Aspen Energy Analyzer Tutorial

Aspen Energy AnalyzerTutorial Guide www.cadfamily.com EMail:[email protected] The document is for study only,if tort to your rights,please inform us,we will delete Version Number: 7.0 Copyright © 1981 - 2008 Aspen Technology, Inc. All rights reserved. Aspen Energy Analyzer, HX-Net, and the aspen leaf logo are trademarks or registered trademarks of Aspen Technology, Inc., Burlington, MA.. All other brand and product names are trademarks or registered trademarks of their respective companies. This document is intended as a guide to using AspenTech's software. This documentation contains AspenTech proprietary and confidential information and may not be disclosed, used, or copied without the prior consent of AspenTech or as set forth in the applicable license. Although AspenTech has tested the software and reviewed the documentation, the sole warranty for the software may be found in the applicable license agreement between AspenTech and the user. ASPENTECH MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESSED OR IMPLIED, WITH RESPECT TO THIS DOCUMENTATION, ITS QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. Aspen Technology, Inc. 200 Wheeler Road Burlington, MA 01803-5501 USA Phone: (781) 221-6400 Toll free: (888) 996-7001 Website http://www.aspentech.com www.cadfamily.com EMail:[email protected] The document is for study only,if tort to your rights,please inform us,we will delete Contents 1 Technical Support.................................................................................................1 Online Technical Support Center....................................................................... 1 Phone and E-mail ........................................................................................... 2 2 Getting Started.....................................................................................................3 3 Crude Pre-Heat Train Network .............................................................................9 Introduction .................................................................................................. 9 Entering Process Information ..........................................................................11 Setting Unit Preferences .......................................................................11 Creating an HI Case.............................................................................12 Entering Process Stream Data ...............................................................13 Entering Utility Stream Data .................................................................17 Examining the Targets ...................................................................................18 Range Targeting..................................................................................19 Building the Heat Exchanger Network...............................................................21 Accessing the HEN Design View .............................................................21 Modifying HEN Diagram Properties .........................................................21 Adding a Splitter .................................................................................23 Adding Heat Exchangers.......................................................................24 Using the Worksheet to Enter Heat Exchanger Information ........................32 Completing the Pre-Flash Section ..........................................................33 Completing the Heat Exchanger Network ................................................36 References ...................................................................................................37 4 Data Extraction from HYSYS...............................................................................39 Introduction .................................................................................................39 Preparing for Data Extraction ..........................................................................41 Setting Unit Preferences .......................................................................41 Opening a HI Case or HI Project ............................................................42 Examining the Extraction Tips ...............................................................43 Editing the HYSYS Case..................................................................................44 Checking Mode & Solved Status of Unit Operations..................................44 Checking Stream & Unit Operation Names ..............................................46 Checking Mixers & Splitters ..................................................................48 Performing the Data Extraction .......................................................................51 Performing the Initial Data Extraction.....................................................51 Fixing Warnings in the HYSYS Case........................................................58 Performing the Final Data Extraction ......................................................60 Adjusting the Extracted Data in Aspen Energy Analyzer .....................................60 www.cadfamily.com EMail:[email protected] Contents The document is for study only,if tort to your rights,please inform us,we will delete iii ......................................................77 Setting Unit Preferences ........................................................93 HEN Retrofit ...............................92 HEN Retrofit ...............................................................................................Repiping Heat Exchangers ............................................................73 References .................................................................................................................................63 Introduction ...........72 Generating HEN Designs .....................................................Resequencing Heat Exchangers .........................................................................Adding Heat Exchangers ......................83 Performing the Retrofit ..........68 Setting Unit Preferences .......76 Introduction ..........please inform us..........................if tort to your rights...................................................................................63 Navigating Through HI Project ........................................82 Building the Heat Exchanger Network...............cadfamily............................com iv The document is for study only................................................................................90 Entering the Retrofit Environment........................................68 Creating the HI Project......................................................95 www.........we will delete Contents ..............................................................69 Entering Process Stream Data .....................79 Entering Utility Stream Data .................76 Creating an HI Project for Retrofit ........................................................................................................94 Comparing Designs ......................................................................................75 6 Heat Exchanger Network Retrofit...............................................................................5 Automatic HEN Design in HI Project.................................................................................................70 Entering Utility Stream Data ......................................................78 Entering the Process Stream Data..................................com EMail:cadserv21@hotmail...................................................................90 HEN Retrofit ....................64 Creating a HI Project for Automatic Design Generation ............77 Creating the HI Project....... we will delete 1 . Search for technical tips. Product release announcements.aspentech. Registered users can also subscribe to our Technical Support e-Bulletins.com EMail:cadserv21@hotmail. Submit and track technical issues.cadfamily. solutions. Search for and download service packs and product updates.1 Technical Support Online Technical Support Center AspenTech customers with a valid license and software maintenance agreement can register to access the Online Technical Support Center at: http://support. Send suggestions.if tort to your rights. Search for and download application examples. These e-Bulletins proactively alert you to important technical support information such as: • • • • Technical advisories. and frequently asked questions (FAQs).com You use the Online Technical Support Center to: • • • • • • • Access current product documentation. Search for and review known limitations. www.com 1 Technical Support The document is for study only. Service Pack announcements. Product updates.please inform us. cadfamily.aspentech.com 2 1 Technical Support The document is for study only.com EMail:[email protected] will delete . and e-mail for customers who have a current support contract for their product(s).com Support Centers North America South America Europe Asia and Pacific Region Operating Hours 8:00 – 20:00 Eastern time 9:00 – 17:00 Local time 8:30 – 18:00 Central European time 9:00 – 17:30 Local time www. Toll-free charges are listed where available.if tort to your rights. For the most up-to-date phone listings. please see the Online Technical Support Center at: http://support. otherwise local and international rates apply.Phone and E-mail Customer support is also available by phone.please inform us. fax. www. and selecting the program file type you want. 2 3 In the Look in drop-down list. Recalling a Case from Memory Included with Aspen Energy Analyzer are several pre-built synthesis cases. 1 There are three ways you can load a case: o On the toolbar.please inform us.if tort to your rights. You can also open an old case by clicking on the Files of type drop-down list. o o From the File menu. 4 Select a case.cadfamily. find and open the Samples folder. These cases are located in the Samples subdirectory.we will delete 3 . and click the Open button.2 Getting Started This chapter provides a quick introduction to Aspen Energy Analyzer (formerly called HX-Net) by illustrating how to recall a saved case and manipulate data within a Heat Integration Project. The pre-built case appears on your desktop.com 2 Getting Started The document is for study only.com EMail:cadserv21@hotmail. select Open. Double-click the program folder from which you want to select a case. Press ctrl o. click on the Open Case icon. o o From the File menu. you can specify various process and utility stream operating parameters and observe the changes on plots. in the File name field. On the toolbar. 1 There are three ways you can save the sample case: o On the toolbar. Press ctrl shift s.cadfamily. For more information. you will convert a Heat Integration (HI) Case into a HI Project. www. Click the View button to open the HI Case view. In this Getting Started example. click on the Save Case icon. 1 If the Heat Integration Manager is not open when you open the case. find the location where you want to save the case. select Save As. Click the Save button. Click on the Converts Case To Project icon at the bottom left corner of the HI Case view. Type a new name. but a HI Project cannot be converted back into a HI Case.com 4 2 Getting Started The document is for study only. and save the case under a different name. select Heat Integration Manager.com EMail:[email protected]. you should save it using a new name to ensure that the original file remains intact. 2 3 4 In the Save in drop-down list. and Aspen Energy Analyzer will save your case with the new name. there are two ways you can access the Heat Integration Manager view: o From the Managers menu. Start Aspen Energy Analyzer. Converting a HI Case to a HI Project A Heat Integration (HI) Project can be used to design multiple heat exchanger networks. Note: The command to convert HI Case into HI Project is irreversible. for example MYCASE. see Recalling a Case from Memory and Saving the Sample Case Under a New Name. With the HI Project.Saving the Sample Case Under a New Name Before working with the case.if tort to your rights. OR o The Heat Integration Manager view appears. click on the Heat Integration Manager icon. 2 3 4 From the Heat Integration Manager view.please inform us. select Case1 from the list on the right. open an old Aspen Energy Analyzer case: case9s.we will delete . A HI Case can be converted to a HI Project. we will delete 5 . www.5 The Convert Case To Project view appears with a message asking if you want to convert the case to project.if tort to your rights. Grand Composite Curve. and all utility streams information on the Utility Streams page. The Data tab displays all process streams information on the Process Streams page. or General Plot in the Main pane. 6 Select Case 1 from the Viewer pane in the HI Project view.cadfamily. Alpha Plot.com 2 Getting Started The document is for study only. Click the OK button. You can also observe the Composite Curves.com EMail:[email protected] inform us. A new set of pinch temperatures are displayed as well. Aspen Energy Analyzer recalculates all target values and the new results are automatically updated. Click on the Targets tab to view these changes. www. In the Utility Load Allocation Method group. Type 400. 3 4 5 Click in the DTmin field at the bottom left corner of the view.please inform us. The inlet temperature of the stream hot1 is currently specified as 327°C. Change the DTmin from 10oC to 15oC. select the Cheapest Utility Principle method.if tort to your rights. Click the Data tab.com EMail:[email protected] 6 2 Getting Started The document is for study only. Press delete. select the Inlet T cell for the hot1 stream. Consequently.we will delete . 1 2 On the Process Streams page. 6 Select the Name cell of the cw stream.cadfamily. Upon modifying the inlet temperature of hot1. the hot composite curve changes.Manipulating Data in the Heat Integration Project Suppose you want to investigate the effect of increasing the inlet temperature of the first hot process stream (hot1) on the composite curves. Note: The status bars at the bottom of the view indicate that the specified hot and cold utility streams are sufficient in satisfying the utility requirements. and press enter. Click on the Options tab. and then click the Utility Streams page. com EMail:cadserv21@hotmail. 10 Select the cell from the Default cost law. www. The Heat Exchanger Capital Cost Parameters group is a matrix of cost set/law data. Cost Index CW coldwater 5°C 6°C 9360 kJ/hm2°C 5°C 3.please inform us. 9 Click on the Data tab. and press enter. and then Economics page. the hot and cold utility status bar changes from Insufficient to Sufficient. For more information about the cost set.7 Aspen Energy Analyzer will ask you if you want to delete the stream. refer to the Economic Parameters section in the Reference Guide.com 2 Getting Started The document is for study only. then click the Summary page and observe the changes in cost.cadfamily.if tort to your rights. 11 Click the Targets tab.we will delete 7 . Click the Yes button. Type 2500. 8 Create a cold utility stream with the following specifications: Stream Name Name Inlet T Outlet T Clean HTC DT Cont.171e-7 Cost/kJ Once you have specified the cold water utility on the Utility Streams page. select Save. Press alt f4. To exit Aspen Energy Analyzer. Multiple Utilities Targeting for Heat Exchanger Network Synthesis. Trans. On the toolbar. 1998. IChemE. V. U. select Exit. 76. 259-272. References Shenoy.we will delete . you can do one of the following: o o o From the File menu.12 You have now completed the HI Project example.if tort to your rights..com 8 2 Getting Started The document is for study only.com EMail:cadserv21@hotmail. Click the Close icon in the top right corner of your Desktop. You can save this case by doing one of the following: o o o From the File menu. click on the Save Case icon.please inform us.cadfamily. www. Press ctrl s. 10 and 6. and Fuel Oil. 7. and Kerosene.com EMail:cadserv21@hotmail. D. Kerosene.please inform us. by the Fuel Oil and Light Naphtha product streams. The crude tower takes the heated feed. respectively. gas. and 4 by the product streams Heavy Naphtha.3 Crude Pre-Heat Train Network Introduction In this tutorial. Linnhoff. The heavier components from the Pre-Flash operation are heated by the hottest portion of the fuel oil in heat exchanger 3. The crude feed is then mixed back together and passed through the desalter unit.if tort to your rights. The concepts introduced here are used throughout the tutorial: • • • creating process and utility streams. kerosene. Heavy Naphtha. Reflux.we will delete 9 . After the crude oil has been heated by the products. The crude oil is split and heated in two heat exchangers.W.com 3 Crude Pre-Heat Train Network The document is for study only. the stripper. The remaining cuts pass to the second column. 8. The proposed flowsheet was adapted from B. Crude oil is often fractionated to produce saleable products such as heavy and light naphtha. et al. respectively.cadfamily. you will design a heat exchanger network for a crude pre-heat train. 5. A network will be created based on a process flow diagram proposed by a contractor. coolers using cooling water. and fuel oils. and then passed through two furnaces. An air cooler. and separates the Light Naphtha and the Fuel Oil cuts. Effluent leaving the desalter is heated up further in heat exchangers 9. Townsend. The stripper column also produces three other products: Gas Oil. Gas Oil. www. it is passed through a Pre-Flash operation to remove the Light naphtha cut. adding heat exchangers. and boiler feed water heaters are used to further cool the product streams down to their target temperatures. and using the worksheet to manipulate the network. please inform us.com EMail:[email protected] will delete .cadfamily.com 10 3 Crude Pre-Heat Train Network The document is for study only.if tort to your rights.Process Flowsheet www. Entering Process Information In order to analyze and create the heat exchanger network described earlier, all of the information from the pre-heat train must be entered into Aspen Energy Analyzer. This includes all process stream information and utility stream information. Setting Unit Preferences Before you begin, verify that the units currently selected in the preferences are the ones you want to use. For this example, the desired unit for energy is MW. 1 2 3 On the Tools menu, click Preferences. The Session Preferences view appears. Click on the Variables tab, and select the Units page. Select EuroSI from the Available Unit Sets list, and click the Clone button. You have created a custom unit set. 4 5 In the Unit Set Name field, change the name of the custom unit set to Energy Integration-Euro SI. In the Display Units group, scroll through the table until you find Energy. The current energy flow unit is set to kcal/h. Note: There is no MW unit in the Energy unit drop-down list, only kW. Since Aspen Energy Analyzer does not have the required unit, the MW unit will be created using the User Conversion. 6 7 8 Click the Unit cell for Energy, then click the Add button. The User Conversion view appears. In the Name field, enter MW. In the second field, enter the conversion factor of 1000, as shown in the figure below. www.cadfamily.com EMail:[email protected] 3 Crude Pre-Heat Train Network The document is for study only,if tort to your rights,please inform us,we will delete 11 9 Click the OK button. The User Conversion view closes, and you return to the Units page. The Energy unit cell now displays the new unit MW*. 10 Click the Close icon to close the Session Preferences view. Creating an HI Case Now, you can create the Heat Integration (HI) Case. To access the main HI Case view, do one of the following. • • From the Features menu, select HI Case. From the Managers menu, select Heat Integration Manager. The Heat Integration Manager view appears. In the left column, select HeatIntegrationCase, then click the Add button. . The Heat On the tool bar, click the Heat Integration Manager icon Integration Manager view appears. In the left column, select HeatIntegrationCase, then click the Add button. • When the HI Case view appears, and you should see the Process Streams tab as shown in the figure below. www.cadfamily.com EMail:[email protected] 12 3 Crude Pre-Heat Train Network The document is for study only,if tort to your rights,please inform us,we will delete Entering Process Stream Data You will now begin entering the stream information, starting with the Fuel Oil stream. 1 2 3 Click in the Name column. Type in the name Fuel Oil, then press the ENTER key. The cursor automatically moves to the Inlet T cell. This stream exits from the bottom of the crude tower at a temperature of 349°C. Ensure that the Inlet T cell is active, and type 349. The default unit that appears in the unit drop-down list is already degrees Celsius, so it does not need to be changed. The desired outlet of this stream is 194°F. The default units are in degrees Celsius. Ensure that the Outlet T cell is active and type 194. To change the units, do one of the following: o 4 Click on the drop-down list that appears and select F. Press the space bar and type F, then press enter. Aspen Energy Analyzer automatically converts the value to the default units. OR o Once the inlet and outlet temperatures are entered, Aspen Energy Analyzer determines the stream type as hot or cold. The stream type is indicated in the second column by a red arrow for hot streams or a blue arrow for cold streams. Note: The temperature value in the Outlet T cell automatically changes from 194°F to 90°C, because degrees Celsius is the default unit. www.cadfamily.com EMail:[email protected] 3 Crude Pre-Heat Train Network The document is for study only,if tort to your rights,please inform us,we will delete 13 which displays a list of default heat transfer coefficients for various materials.2 12. Repeat steps #2.cadfamily. 6 After entering the information for the last segment (167°C to 90°C). a warning appears. the process stream is complete as should appear as shown in the figure below.please inform us. Note: Double-clicking in the HTC column opens the HTC Default Values view. Stream segmentation is extremely useful for streams that change phase or have nonlinear variations in enthalpy as the temperature changes. the Fuel Oil stream must be segmented.9 8. For this example. Click in the empty Outlet T cell and type 243.com EMail:[email protected] will delete .8 MW. the enthalpy or flow heat capacity must be entered. Click in the Heat Load cell and type 22. click in the target outlet temperature cell (90°C) and click the Insert Segment button.if tort to your rights. If you insert the segment values in the wrong order. www. The enthalpy for this section is 22. 1 Double-click in any cell of the Fuel Oil row (except for the HTC column) to open the Process Stream view. A blank row appears above the target outlet temperature. and #4 to add more segments with the following information: Segment Outlet T (°C) 213 167 90 Heat Load (MW) 5.Segmenting Process Streams To complete this stream's information.com 14 3 Crude Pre-Heat Train Network The document is for study only. The outlet temperature of the first segment is 243°C. All other information is optional.8. #3.9 3 4 5 Note: Always click the target Outlet T cell before clicking the Insert Segment button. 2 To add a segment. enter the following stream information. click on the Graphs tab. the Inlet T values are calculated for you.we will delete 15 . The red arrow beside the stream name indicates it is a hot stream. Enter only the Outlet T values and the Heat Load/Enthalpy values.cadfamily. If you try to enter the segment values in the wrong order.com EMail:[email protected] tort to your rights.com 3 Crude Pre-Heat Train Network The document is for study only. Now that you know how to successfully enter process stream information and create segmented streams. o 9 Enter the stream name. first Inlet T value and the target (last) Outlet T value on the Process Streams tab before accessing the Process Stream view to enter the segment information. 8 Click the Close icon to return to the Process Streams tab of the HI Case view. o o www. a warning appears.7 To view the temperature versus enthalpy plot.please inform us. The plot appears similar to the figure below. 3 3.8 22.if tort to your rights.2 8.8 0.8 17.8 3.6 120 122 163 186 Crude Tower Feed 189 237 265 After entering all the information in the above table.6 5.2 8.com EMail:[email protected] 4.Stream Name Gas Oil Inlet T (°C) 341 210 172 111 Outlet T (°C) 210 172 111 65 135 38 169 77 127 38 136 118 108 71 121 122 163 186 194 237 265 368 Heat Load/Enthalpy (MW) 13.com 16 3 Crude Pre-Heat Train Network The document is for study only.9 0.cadfamily.please inform us.6 19.9 68 Kerosene Reflux Heavy Naphtha Light Naphtha 268 135 251 169 235 127 168 136 118 108 Desalter Feed Pre-Flash Feed 15.2 39.5 8. the Process Streams tab in the HI Case view appears similar to the figure below.4 0.9 13.6 8.3 13. www.we will delete .7 5.8 5.1 11. move the cursor over the <empty> cell to activate .com 3 Crude Pre-Heat Train Network The document is for study only.if tort to your rights.com EMail:[email protected] inform us.we will delete 17 . www.Entering Utility Stream Data Now that all of the process stream information has been specified. The utilities for this example will be selected from the list of default utilities included with Aspen Energy Analyzer. In the Name column. then select it.cadfamily. click on the Utility Streams tab. the utilities to be used for heating and cooling must be specified. Scroll through the list until you find Cooling Water. 1 On the HI Case view. the down arrow 2 3 4 Click the down arrow to open the drop-down list. 5 Repeat steps #2 .#4 to add the following utilities: o o o LP Steam Generation Air Fired Heat (1000) The Utility Streams tab should now appear similar to the figure below. This cost information is required to calculate the operating cost targets for the system.com EMail:cadserv21@hotmail. click on the Open Targets View icon appears at the bottom of the view for all tabs. To open the Targets view: 1 that On the HI Case view.cadfamily. this information is left as is. These targets represent the performance of an ideal heat exchanger network. Since the calculation of the capital cost targets and network capital costs requires at least one set of economic data. Examining the Targets Now that all of the data required to create the crude pre-heat train network has been entered. Note: A default set of economic parameters is supplied by Aspen Energy Analyzer.Note: All utilities have default costs associated with them. The Targets view appears. you can examine the various engineering targets calculated by Aspen Energy Analyzer.if tort to your rights.we will delete . www.please inform us.com 18 3 Crude Pre-Heat Train Network The document is for study only. 6 Click the Economics tab. we will delete 19 . is a key parameter in defining the balance between capital and operating costs. however.com EMail:cadserv21@hotmail. Click on the Plots page to view the plot. as shown in the figure below. 1 2 3 On the Targets view.please inform us. DTmin. 4 To find a better approximation of the optimal DTmin value. which has 19 exchangers (including heaters and coolers). DTmin. Therefore. may require less energy from the utility streams than the targets shown in the Energy Targets group.cadfamily. www. The minimum approach temperature.if tort to your rights. The network. Click the Calculate button. to perform the calculations. Click the Clear Calculations button to clear the plot before you perform a new calculation.The minimum number of units required to build this heat exchanger network is 11.com 3 Crude Pre-Heat Train Network The document is for study only. The network you will build is based on the Process Flowsheet. you need to narrow the calculations. click on the Range Targets tab. You can find the optimal value for DTmin by performing a Range Targeting calculation. Range Targeting One of the main objectives when creating a heat exchanger network is to minimize the capital and operating costs. located below the Range Targets tab. which displays the Total Cost Index Target vs. the network that will be built will be over the unit targets. For the purpose of this application.5°C. It is 19.com EMail:cadserv21@hotmail. however. In the Upper DTmin cell. In the Interval Size cell. 10 To verify this value. In the Lower DTmin cell. Move across the row to find the corresponding DTmin value. 13 Click the Close icon Case view.com 20 3 Crude Pre-Heat Train Network The document is for study only.5°C.5 Click the DTmin Range button. This is the step size that will be used between the lower and upper DTmin values. The results indicate that the optimal DTmin value is 19. leave the DTmin value at 10°C. enter 15.if tort to your rights. This view allows you to specify the range of calculations.5°C.cadfamily.please inform us.we will delete . The Range Target view should appear like the figure below: 6 7 8 9 Click the Calculate button. enter 0. enter 25. 12 The new plot shows that the optimal DTmin value is 19. The Range Targets view appears. to close the Targets view and return to the main HI www. 11 Examine the values in the Total Cost Index column for the minimum value. click on the Table page. Aspen Energy Analyzer automatically closes the Range Target view and performs the new calculation.5. click the Open HEN Diagram Properties View icon OR Right-click on the Grid Diagram. 2 From the list in the Property Presets view.if tort to your rights. The Heat Exchanger Network click the Open HEN Grid Diagram icon (HEN) Design view appears with the Grid Diagram tab active. select Preset 4: (Temperature). This property preset sorts the streams by their temperatures and displays both process and utility streams. The Design On the HEN Design view.we will delete 21 . In the HI Case view. 3 www. click the Open Palette View icon Tools palette appears. as shown in the figure below. . Modifying HEN Diagram Properties To open the Property Presets view.cadfamily.com 3 Crude Pre-Heat Train Network The document is for study only. .com EMail:cadserv21@hotmail. and then select Properties from the Object Inspect menu.please inform us. Click the Edit button.Building the Heat Exchanger Network Accessing the HEN Design View To access the heat exchanger network (HEN) design. On the Design Tools palette. do one of the following: 1 . The Property Preset: Preset 4 view appears. The heat exchanger name will now appear above the heat exchanger object in the Grid Diagram.cadfamily. 6 Click the Close icon to close the Property Preset 4:(Temperature) view and the Property Presets view.if tort to your rights. www.4 5 Click the Annotations tab.com 22 3 Crude Pre-Heat Train Network The document is for study only.com EMail:cadserv21@hotmail. In the Heat Exchangers group.we will delete . click the Middle drop-down list and select Name as shown in the figure below.please inform us. To expand the splitter. The Desalter Feed stream exchanges heat with the Light Naphtha stream in exchanger 6 and the Fuel Oil stream in exchanger 10. 4 5 Now release the mouse button. In this procedure. The splitter appears as a solid blue dot. 1 Click the Open Palette View icon the Grid Diagram tab. www.Adding a Splitter To maintain a logical order. Drag the cursor over the Desalter Feed stream until the Bull's eye icon appears. click the blue dot once.cadfamily.please inform us.if tort to your rights. the Design Tools palette must be available. . The crude oil feed is split before it enters heat exchanger 10 and 6 on the Process Flowsheet. so we must split the Desalter Feed stream. mixers and splitters. you will add a splitter to the Desalter Feed stream in the flowsheet. You will now place the first heat exchanger on the Desalter Feed stream. located in the bottom right corner of Note: To add heat exchangers.com 3 Crude Pre-Heat Train Network The document is for study only. The Design Tools palette appears.we will delete 23 . 2 3 Right-click and hold on the Add Split icon . you will place the heat exchangers in a position similar to that shown on the Process Flowsheet. The stream will now appear as shown in the figure below.com EMail:cadserv21@hotmail. com EMail:cadserv21@hotmail. right-click and hold on the Add Heat Exchanger icon . 3 4 Release the mouse button.we will delete . A light blue dot will appear underneath the cursor as you drag it to the new stream. then drag the cursor to the Light Naphtha stream. 5 www.Adding Heat Exchangers Adding Heat Exchanger 6 In this procedure. Click and hold on the red dot. 1 2 In the Design Tools palette. Note: The streams on the Grid Diagram appear dashed because the energy in the streams has not been satisfied. you will place an exchanger between the Light Naphtha stream and the Desalter Feed stream. This is Exchanger 6 on the Process Flowsheet.com 24 3 Crude Pre-Heat Train Network The document is for study only. The heat exchanger appears as a sold red dot. the lines representing the streams changes from dashed to solid.if tort to your rights. Release the mouse button. Drag the cursor to the top branch of the split on the Desalter Feed stream until the Bull's eye icon appears.cadfamily. The heat exchanger appears. As heat exchangers are placed and stream energy is satisfied.please inform us. if tort to your rights. In the Name field.we will delete 25 .com 3 Crude Pre-Heat Train Network The document is for study only.com EMail:cadserv21@hotmail. 11 Click the Tied checkbox by the Desalter Feed stream (cold stream) inlet temperature field. you can tie the inlet temperature of the hot stream entering the heat exchanger. 7 8 9 10 Click the Data tab. Click the Notes tab.cadfamily. Double-click either end of the heat exchanger (the grey circles) to open the Heat Exchanger Editor view. 6 Aspen Energy Analyzer may appear to move the heat exchanger to the bottom branch. Note: The Desalter Feed stream passes through the hottest part of the Light Naphtha stream.The Grid Diagram tab should now appear as shown in the figure below. www.please inform us. type Exchanger 6. The view now appears as shown in the figure below. If this happens. adding a heat exchanger to the second branch later in the tutorial will result in Exchanger 6 showing on the top branch. therefore. 14 The heat exchanger now solves and appears as shown in the figure below.cadfamily.com 26 3 Crude Pre-Heat Train Network The document is for study only. 15 Click the Close icon to close the Exchanger 6 property view. Note: Since the Desalter Feed stream is being heated from its initial inlet temperature.we will delete . All values in black have been calculated by Aspen Energy Analyzer and cannot be altered.if tort to your rights. Before the calculation can occur. enter 121°C.com EMail:cadserv21@hotmail. Note: All values in blue have been entered by the user and can be altered. you can “tie” this value to the inlet temperature value found on the Process Streams tab on the main HI Case view. you must specify the cold stream outlet temperature.please inform us. www.12 Click the Tied checkbox by the hot stream inlet temperature field. 13 In the cold stream outlet temperature field. This value comes from the Defaulter Stream outlet target temperature on the Process Flowsheet. please inform us.Adding Heat Exchanger 10 1 2 In the Design Tools palette. then drag the cursor to the Fuel Oil stream.we will delete 27 . 3 4 Release the mouse button.if tort to your rights. 5 www. right-click and hold on the Add Heat Exchanger icon . The Grid Diagram tab should now appear as shown in the figure below. The heat exchanger appears as a sold red dot.com 3 Crude Pre-Heat Train Network The document is for study only. A light blue dot will appear underneath the cursor as you drag it to the new stream. Drag the cursor to the empty branch of the split on the Desalter Feed stream until the Bull's eye icon appears. The heat exchanger appears. Click and hold on the red dot. Release the mouse button.cadfamily.com EMail:cadserv21@hotmail. you must change the balance of flows going through the splitter on the Desalter Feed stream. which is also the mixer temperature of 121°C. From the Process Flowsheet. Click the Data tab. Aspen Energy Analyzer automatically calculates the inlet temperature of the hot stream to be 232.6°C to its target temperature. you know that the temperature of the hot stream entering the exchanger should be 167°C. then press the enter key. type 120°C. 13 Click the Close icon to close the property view. www. We also know the Fuel Oil stream temperature exits the exchanger at 120°C. 11 In the Desalter Feed cold stream outlet temperature field.7°C. Note: According to the Process Flowsheet.com EMail:[email protected]. Click the Notes tab.we will delete . however.please inform us. type Exchanger 10.com 28 3 Crude Pre-Heat Train Network The document is for study only. enter 121°C.6 7 8 9 Double-click on either end of the heat exchanger (the grey circles) to open the Heat Exchanger Editor view. 12 In the empty hot stream outlet temperature field. the Desalter Feed is being heated from its inlet temperature of 15. The exchanger solves. 10 Click the Tied checkbox by the Desalter Feed cold stream inlet temperature field.if tort to your rights. In the Name field. In order to adjust this temperature. then press the enter key. Now you will adjust the split ratio: 1 3 Arrange the heat exchanger view and the Split Editor view so you can see both views clearly. you have to click the Pin icon and change the Modal views to Non-Modal views. click the Segments drop-down list and select Split Fraction. The Property Presets view reappears. type Split Ratio.com 3 Crude Pre-Heat Train Network The document is for study only. You want this view open so you can observe the changes in the hot stream inlet temperature. ensure the split ratio values are visible on the Grid Diagram view: 1 2 3 4 5 6 7 On the Design Tools palette. and Split Ratio appears in the list. In the Streams group. then click the Edit button. www. To open all views. 2 Open the splitter view by double-clicking on either end of the splitter. To decrease the inlet temperature for Exchanger 10. In the list. An effective way of doing this is to decrease the flow of the cold stream. The Split Editor view appears as shown in the figure below. Double-click on either end of Exchanger 10 to open the heat exchanger view.Adjusting the Split Ratio Before you adjust the split ratio. The Property Presets view appears. then press enter. The Property Preset: Split Ratio view appears. select Split Ratio. In the Name field. Note: Remember. the heat exchanger views and Split Editor view are Modal views. The split ratio values now appear on the Grid Diagram view for the Desalter Feed stream. you must transfer less energy in the heat exchanger. The New Property Preset view appears.we will delete 29 .if tort to your rights. click the Open HEN Diagram Properties View icon . The default ratio is 0. Click the Annotations tab.com EMail:[email protected]:0. Click the New button.cadfamily.5.please inform us. Click the Close icon on both the Property Preset: Split Ratio view and the Property Preset view to close them. Note: From the Process Flowsheet. you know the air cooler cools the Light Naptha stream from the Exchanger 6 outlet temperature of 107°C to the stream target temperature of 71°C. This means that this stream's energy requirements have been satisfied.we will delete . Adding Two Coolers You will now place an air cooler on the Light Naphtha stream and a cooler on the Fuel Oil stream.#5 from either of the "Adding Heat Exchangers" procedures to add an air cooler between the Air stream and Light Naphtha stream.com EMail:cadserv21@hotmail. 2 3 4 5 www. Flow Ratios column. 7 8 9 Open the Property Presets view by clicking the Open HEN Diagram Properties View icon in the Design Tools palette.8 for Exchanger 6. 1 Follow steps #1 . Select the Preset 4: Temperature to display the temperature value above the streams for each segment. The split ratio will be approximately 0. downstream from Exchanger 6. Click the Tied checkbox by the hot stream inlet temperature field. Click the Data tab. Open the Heat Exchanger Editor view by double-clicking on either end of the newly inserted heat exchanger. The line representing the Desalter Feed stream is now solid. 5 6 Close the Split Editor view and the Exchanger 10 property views.4 In the Split Editor view.2 for Exchanger 10 and 0.please inform us.cadfamily. Continue to adjust the split ratio until the hot stream inlet temperature for Exchanger 10 is about 167°C. Click the Notes tab.75 and observe the inlet temperature change in the heat exchanger view. Examine the Grid Diagram to confirm which table row affects which branch of the split.com 30 3 Crude Pre-Heat Train Network The document is for study only. Note: The rows in the Branch Streams table represent the two branches of the split. In the Name field. Change the flow ratio value from 0.5 to 0.if tort to your rights. type Air Cooler. click in the top cell with the blue text. Click the Close icon on the Property Preset view to close the view. 7 8 9 Add a cooler between the Fuel Oil stream and the Cooling Water utility stream. 12 Click the Tied checkbox by the hot stream outlet temperature field. Open the Heat Exchanger Editor view by double-clicking on either end of the newly inserted heat exchanger.com 3 Crude Pre-Heat Train Network The document is for study only. In the Name field.6 Click the Tied checkbox by the hot stream outlet temperature field. The heat exchanger now solves.please inform us. you know the cooling water utility cools the rest of the Fuel Oil stream from the Exchanger 10 outlet temperature of 120°C to the stream target temperature of 90°C. 11 Click the Tied checkbox by the hot stream inlet temperature field.com EMail:cadserv21@hotmail. www. Note: From the Process Flowsheet.if tort to your rights. type CW1.we will delete 31 . The Fuel Oil and Light Naphtha streams should appear as shown in the figure below. Click the Notes tab. 10 Click the Data tab. The exchanger solves.cadfamily. downstream from Exchanger 10 on the Fuel Oil stream. Follow steps #1 .Using the Worksheet to Enter Heat Exchanger Information After the desalter operation.cadfamily. 3 4 5 In the Heat Exchanger column. You also know the Pre-Flash Feed stream exits the exchanger at 122°C. The final values are calculated and appear on the worksheet. you know that both the Heavy Naptha stream and the Pre-Flash Feed stream enter Exchanger 9 at their inlet temperatures. On the HEN Design view. 6 7 Click the checkbox in the Tied column beside the Hot T in column. The "yellow light" icon disappears. This stream will first pass through Exchanger 9 and transfer heat with the Heavy Naphtha stream. In the following procedure. click the Work Sheet tab (see figure below).#5 from either of the "Adding Heat Exchangers" procedures to add a heat exchanger between the Pre-Flash Feed stream and the Heavy Naphtha stream. Click in the Cold T out cell and enter 122°C. indicating a fully solved heat exchanger. Note: From the Process Flowsheet. In the Exchanger 9 row.com 32 3 Crude Pre-Heat Train Network The document is for study only.com EMail:[email protected] inform us.if tort to your rights. the crude oil is represented by the Pre-Flash Feed stream. The newly added heat exchanger is named E-104.we will delete . you will use the Work Sheet tab to modify the heat exchangers: Note: You can only add heat exchangers in the Grid Diagram tab. click the checkbox in the Tied column beside the Cold T in column. Click on the Grid Diagram tab. 1 2 Close any property views that are open. 8 www. click in the cell with E-104 and type Exchanger 9. The exchanger solves. Add a heat exchanger on the other/empty branch of the Pre-Flash Feed and connect the exchanger to the Reflux stream.9 To satisfy the rest of the energy in the Heavy Naphtha stream. follow steps #1 .#5 from either of the "Adding Heat Exchangers" procedures to add a heat exchanger between the Heavy Naphtha stream and the Cooling Water utility stream. Refer to steps #1 through #5 in Adding a Splitter on page 23. Completing the Pre-Flash Section To complete the section between the desalter operation and the pre-flash operation. This is also the mixer temperature. Add a heat exchanger between the top branch of the split Pre-Flash Feed stream and the Kerosene stream.com EMail:[email protected] tort to your rights. downstream from Exchanger 8.please inform us. 11 In the CW2 row.com 3 Crude Pre-Heat Train Network The document is for study only. In the cold stream outlet temperature field. 12 Rename the new exchanger CW3. 11 Add a heat exchanger between the Cooling Water utility and the Reflux stream. The default split of 0. Satisfying the Kerosene and Reflux Streams: 1 2 3 4 5 6 7 8 9 Add a splitter to the Pre-Flash Feed stream downstream from Exchanger 9. click the checkboxes in the Tied columns beside the Hot T in and Hot T out columns. 10 Click the Work Sheet tab and rename the new exchanger CW2. 13 Click the Tied checkboxes for both the hot stream inlet and outlet temperatures.we will delete 33 . if required (see Adjusting the Split Ratio on page 29).50 to each branch should be sufficient. www. Ensure that the hot stream outlet temperature of Exchanger 7 is 135°C. four more exchangers and five coolers must be added. Rename the new exchanger Exchanger 7. This is also the mixer temperature. enter 163°C.cadfamily. the Pre-Flash Feed stream should appear similar to the figure below. 10 Adjust the split ratio of the Pre-Flash Feed stream. Click the Tied checkbox for both the hot and cold stream inlet temperatures. In the cold stream outlet temperature field. Click the Tied checkbox for both the hot and cold stream inlet temperatures. You can do this by using just the Grid Diagram tab. or both Grid Diagram and Work Sheet tabs. Rename the new exchanger Exchanger 8. The exchanger solves. After the addition of these two exchangers. and the hot stream outlet temperature of Exchanger 8 is 169°C. enter 163°C. 2 3 4 5 6 7 8 9 Rename this heat exchanger Exchanger 5. The exchanger solves. enter 172°C. 11 Click the Tied checkboxes for the hot stream inlet and outlet temperatures. downstream from the splitter.14 Add a heat exchanger between the Cooling Water utility and the Kerosene stream. downstream from Exchanger 5. Rename this heat exchanger BFW Heating 1. 10 Rename this heat exchanger CW5.we will delete . enter 210°C. www. Satisfying the Gas Oil Stream 1 Add a heat exchanger between the Pre-Flash Feed stream. and the Gas Oil stream. downstream from BFW Heating 1. This value comes from the Process Flowsheet Add another heat exchanger between the Gas Oil stream and the LP Steam Generation utility.if tort to your rights.please inform us. The exchanger solves.com 34 3 Crude Pre-Heat Train Network The document is for study only. 16 Click the Tied checkboxes for both the hot stream inlet and outlet temperatures.cadfamily. In the hot stream outlet temperature field. 17 Close any property views that are open. 15 Rename the new exchanger CW4.com EMail:cadserv21@hotmail. Click the Tied checkbox for the hot stream inlet temperature only. downstream from Exchanger 7. Click the Tied checkboxes for both inlet temperatures. Add one more heat exchanger between the Gas Oil stream and the Cooling Water utility. In the hot stream outlet temperature field. Click the Tied checkboxes for the Pre-Flash cold stream inlet and outlet temperatures. In the hot stream inlet temperature field. enter 243°C. 1 2 3 4 Add a heat exchanger between the Pre-Flash Feed stream and the Fuel Oil stream.if tort to your rights.please inform us.Satisfying the Pre-Flash Feed Stream This is the last heat exchanger required to satisfy the Pre-Flash stream.we will delete 35 . www.com EMail:cadserv21@hotmail. The Grid Diagram tab and Work Sheet tab should now appear similar to the figures below. Rename the heat exchange Exchanger 4. This temperature comes from the Process Flowsheet.com 3 Crude Pre-Heat Train Network The document is for study only. The heat exchanger solves. upstream from Exchanger 10 on the Fuel Oil stream.cadfamily. The exchanger solves. The exchanger solves and all streams are satisfied. and for the cold stream inlet temperature. The Fuel Oil stream should appear similar to the figure below.com EMail:cadserv21@hotmail. 11 Add the final heat exchanger between the same streams as in step #4 above. www. 2 Rename the heat exchanger Exchanger 3.if tort to your rights. Click the Tied checkboxes for the hot stream inlet and outlet temperatures. Add a heat exchanger between the Fuel Oil stream and the LP Steam Generation utility. Add the first fired heater by placing a heat exchanger between the Crude Tower Feed and Fired Heat (1000) utility.please inform us. Rename the exchanger BFW Heating 2. Click the Tied checkbox by the cold stream inlet temperature. The exchanger solves. between Exchanger 4 and Exchanger 10. The heat exchanger solves. enter 265°C. The furnaces will be replaced with heaters on the Fired Heat (1000) stream.Completing the Heat Exchanger Network The rest of the heat exchanger network consists of heat exchangers to satisfy the Fuel Oil stream and two furnaces. Note: Ensure that you place the hot end of the heat exchanger between the Fuel Oil stream inlet and Exchanger 4. 4 5 6 7 8 9 10 In the cold stream outlet temperature field. indicating that there are no unsatisfied streams.cadfamily. not between Exchanger 4 and Exchanger 10. The status bar on the Grid Diagram tab will appear green.we will delete . 1 Add a heat exchanger between the Fuel Oil stream and Crude Tower Feed stream. and no uncalculated heat exchangers.com 36 3 Crude Pre-Heat Train Network The document is for study only. 3 Click the Tied checkboxes for the hot stream inlet and outlet temperatures. 13 Click the Tied checkbox for both cold stream temperatures. The heat exchanger network is complete. 12 Rename the exchanger Furnace 2. Rename this exchanger Furnace 1. downstream of Exchanger 3. downstream from Furnace 1. Guy.. Marsland. D.H.com 3 Crude Pre-Heat Train Network The document is for study only.please inform us. References Linnhoff.. D. B. Thomas..A. www. IChemE England...Confirm your heat exchanger with the completed HEN diagram and worksheet as shown in the figures below.cadfamily.F. 1982.R..E.W.com EMail:[email protected] tort to your rights. Townsend. A User Guide on Process Integration for the Efficient use of Energy. Boland.. A. When you examine all of the calculated values. Hewitt. G. you will notice that all values are very close to those indicated on the initial Process Flowsheet.we will delete 37 . B. R. com EMail:[email protected] tort to your rights.cadfamily.we will delete .www.please inform us.com 38 3 Crude Pre-Heat Train Network The document is for study only. www.we will delete 39 .hsc.0 or higher installed on your computer in order to use this tutorial. and that you understand how to create streams and create a heat exchanger network using the Grid Diagram.com EMail:[email protected] and can be found in the Samples\HYSYSTestCases directory.if tort to your rights. This tutorial assumes that you have used HYSYS and understand how to navigate through Aspen Energy Analyzer.please inform us. The HYSYS case that will be extracted is a modified version of the sample HYSYS case G-2. Note: You must have HYSYS version 3.cadfamily. you will examine one of the default HYSYS cases provided with Aspen Energy Analyzer. and then extract the information into Aspen Energy Analyzer. In this tutorial.com 4 Data Extraction from HYSYS The document is for study only. The file included with Aspen Energy Analyzer is named dataext.4 Data Extraction from HYSYS Introduction One of the extremely useful features of Aspen Energy Analyzer is its ability to extract information from HYSYS or Aspen Plus so that heat integration analysis can be performed on a pre-built simulation. without having to reenter the information. It is also assumed that you have completed the HI Case or HI Project tutorial. cadfamily.please inform us. www.com 40 4 Data Extraction from HYSYS The document is for study only. The natural gas industry commonly uses tri-ethylene glycol (TEG) for gas dehydration where low gas dew point temperatures are required.we will delete . such as in the design of offshore platforms in the Arctic or North Sea regions or for other cryogenic processes.if tort to your rights.com EMail:[email protected] HYSYS flowsheet is shown in the figure below. it is always wise to read the Extraction Tips so that you can find as many possible problems in your simulation flowsheet before performing the first extraction.if tort to your rights. included in the \Samples\HYSYSTestCases directory of your Aspen Energy Analyzer program. then click the Units page. this stream is mixed with stream Water To Saturate.com 4 Data Extraction from HYSYS The document is for study only.cadfamily. This stream is updated by the recycle operation. verify that the units currently selected in the preferences are the ones you want to use. select SI in the Available Unit Sets list. 1 2 3 4 Open HYSYS (version 3. and when the rest of the simulation has been built. the TEG only stream is being heated at the same time that the pressure is greatly reduced. Stream TEG Feed absorbs most of the water in the Gas To Contactor stream.The composition of the natural gas stream (Inlet Gas) has been provided on a water-free basis. If it isn't. but it is easier to compare numbers if they use the same units. The rich TEG stream from the absorber bottoms (Rich TEG) is heated to 220 °F by the hot lean TEG from the regenerator (Regen Bttms).we will delete 41 . Aspen Energy Analyzer will perform the unit conversion calculations when it extracts the data from HYSYS. A recycle operation is required to complete this simulation because the lean TEG is being returned to the contactor. www.please inform us. A multiple attachment has been used to display two options. and is fed to the stripper column for regeneration. An initial estimate of the lean TEG is required to run the contactor. where it is contacted with a regenerated lean TEG stream (TEG Feed).0 or higher). The regenerated TEG is cooled and returned to the top of the TEG absorber. To ensure water saturation. In the HYSYS Tools menu. Setting Unit Preferences Before you begin. a heat exchanger using steam or a valve. the regenerator will calculate the new lean TEG. The Session Preferences view appears. Preparing for Data Extraction HYSYS or Aspen Plus data can be extracted into either HI Project or HI Case. The Unit Set Name should be SI.com EMail:cadserv21@hotmail. select Preferences.hcs. This scrubbed stream (Gas To Contactor) is fed to the TEG Contactor. Click the Variables tab. For the purposes of demonstrating Aspen Energy Analyzer capabilities to extract HYSYS data. The water-saturated gas stream Gas + H2O is then fed to a scrubber to knock out the free water. The stripper column is a refluxed tower consisting of 3 stages plus a condenser. Open the case dataext. Before performing a data extraction. do one of the following: • • From the Features menu. In Aspen Energy Analyzer.we will delete . From the Managers menu. such as newDataEXT. • The HI Case view or HI Project view appears.please inform us. Opening a HI Case or HI Project To access the HI Case view or HI Project view. click the Heat Integration Manager icon Integration Manager view appears. select Heat Integration Manager. then click the Add button.com EMail:[email protected] 42 4 Data Extraction from HYSYS The document is for study only.hsc.cadfamily. The Heat Integration Manager view appears. Save the modified case under a new name. select HeatIntegrationCase or HeatIntegrationProject. select HeatIntegrationCase or HeatIntegrationProject. select HI Case or HI Project. open Aspen Energy Analyzer. Before you can examine the extraction tips. The Heat On the tool bar.5 6 7 From the Windows Start menu. repeat steps #3 and #4 to set the units to match the HYSYS case. then click the Add button. In the left column.if tort to your rights. www. . open the HI Case view or HI Project view. In the left column. Do not save any changes over the original case. You are now ready to look at the extraction tips. www. The Extraction Tips view appears. the Data Extraction icon appears only on the Process Streams tab.com 4 Data Extraction from HYSYS The document is for study only. Examining the Extraction Tips In the HI Case view.com EMail:cadserv21@hotmail. The Extraction Wizard appears.cadfamily.if tort to your rights.please inform us. In the HI Project view.we will delete 43 . 1 Click the Data Extraction icon . 2 Click the Tips button. it appears on the Process Streams page of the Data tab. we will delete . It is good practice to read these tips before every extraction.Read all tips carefully before continuing to the next section. Editing the HYSYS Case Before you extract information from HYSYS. it will not produce messages about others that can result in incorrect targets. such as repeated names. The sample case should be in steady state mode.com 44 4 Data Extraction from HYSYS The document is for study only. and absolutely essential to the extraction. Checking Mode & Solved Status of Unit Operations In order to extract a HYSYS case into Aspen Energy Analyzer.cadfamily. This will allow you to find some if not all of the errors before you perform the data extraction. Ensure that the HYSYS case to be extracted is open and that you've set the unit preferences as described in steps #1 and #2 in Setting Unit Preferences on page 41. ensure that the Steady State Mode icon is active. and ensure that the case converges.com EMail:cadserv21@hotmail. www. as shown in the figure below. On the HYSYS tool bar. If it is not. you will use the tips you just reviewed to check the HYSYS case to be extracted to find possible problems. the case must be in steady state mode (tip 3) and the entire flowsheet must be solved (tip 2). they will be checked first. Since these conditions are very easy to check. click the Steady State Mode icon . Although Aspen Energy Analyzer will produce warnings about many of the issues in HYSYS.if tort to your rights. as you will be manipulating the case based on these tips.please inform us. and all unit operations should be outlined in black. all energy streams should appear dark red.please inform us.1 2 On the flowsheet. if the sample case is not solved. However. check the following: www. All material streams should appear dark blue.cadfamily.com 4 Data Extraction from HYSYS The document is for study only.we will delete 45 .if tort to your rights. verify that all streams and unit operations have been solved by doing one or both of the following: Examine all streams and unit operations.com EMail:cadserv21@hotmail. 3 Check the Object Status Window at the bottom left corner of the window for error messages. The sample case provided is solved. cadfamily. and the valve will not result in any changes to the network built in Aspen Energy Analyzer. 1 Access the Object Navigator by doing one of the following: o o o On the toolbar.if tort to your rights.e. Since multiple attachments pose problems for Aspen Energy Analyzer. The easiest way to check for this is by using the Object Navigator.we will delete . 8. This will display all unit operations and streams. Click the Solver Active icon . either within one flowsheet or across multiple flowsheets (tips 6. These items may already be removed from the sample case. In the Flowsheets group. it could be because the solver is not active. there are no streams and unit operations forming a second system). Delete valve VLV-101and the material stream TEG out.). Check that there are no extra unit operations or streams in the flowsheet (tip 1). Check your HYSYS manuals for more information on how to solve flowsheets. 2 Search for unit operations and streams that have the same name. Remove the Valve and Extra Stream In the sample case DataEXT. The Object Navigator appears as shown in the figure below. In the Filter group. only has a multiple attachment to a valve and a heat exchanger. select the main flowsheet. Press the F3 hot key. however. . remove the valve and extra stream. www. 9. nor the targets calculated.com 46 4 Data Extraction from HYSYS The document is for study only. 1 2 Disconnect stream TEG only from valve VLV-101..hsc. If the Trace Window is empty.please inform us. click the All radio button. The stream TEG. Checking Stream & Unit Operation Names Checking for Duplicate Names Multiple tips warn of extraction problems due to streams and unit operations having the same name. and the flowsheet is not solved. all of the operations and streams are directly related to the flowsheet (i. click the Object Navigator icon In the Flowsheet menu. select Find Object.com EMail:cadserv21@hotmail.• • • • Check the Trace Window for the streams or operations that are missing information. you will find that there is a heat exchanger and a stream with this name. This takes care of tip 9. There are two objects named E100. 2 Examine the Regen Feed stream. which appears in the following figure. The streams Sour Gas and Regen Bttms exit the condenser and reboiler. Rename the stream to TEG out. Using the Object Navigator.if tort to your rights. there is no exchanger on the Regen Feed stream. If you look on the flowsheet. respectively. 3 Open the TEG Regenerator sub-flowsheet. In this case there are none.com EMail:[email protected]. o o All the inlet and outlet streams entering and exiting each column are subject to this rule.3 Scroll down the Flowsheet Objects list. www.please inform us. so it will not pose a problem. 4 Checking for Streams that Span Multiple Flowsheets 1 Use the Object Navigator to check for names that appear in more than one flowsheet.we will delete 47 . the Regen Feed stream exits a heat exchanger before entering the TEG Regenerator subflowsheet. This may already be corrected in the sample case. however. Look for any stream that contains a heat exchanger in both the main flowsheet and the sub-flowsheet. repeat step #2 to ensure that there are no other multiple names. In the main flowsheet. In this sub-flowsheet.com 4 Data Extraction from HYSYS The document is for study only. Aspen Energy Analyzer uses the stream entering the reboiler and returning to the column during extraction. o 6 To do this. Inlet Gas and Water to Saturate.please inform us. therefore. there are no multiple splitters or mixers in series.com 48 4 Data Extraction from HYSYS The document is for study only. Open the T-100 column sub-flowsheet.com EMail:[email protected] tort to your rights. however. There is no reboiler or condenser on this column. this will not create a stream duplication. This will display all material streams existing in the flowsheet.cadfamily. Check for non-isothermal mixers (tip 10). 1 Open the property view for the Saturate mixer. so the Water to Saturate stream should be cooled down to the temperature of the Inlet Gas and the mixer outlet stream Gas + H2O. Note: The temperatures of the two inlet streams. however. Use the Object Navigator to see if there are any internal streams existing within any sub-flowsheet that do not represent a real stream. www. highlight each sub-flowsheet in the Flowsheets group of the Object Navigator. In this case. Since the reboiler and condenser must be taken into account. o o o Checking Mixers & Splitters The last items to check before performing the data extraction in HYSYS are mixers and splitters. The Dry Gas stream exiting the T-100 column is entering a heat exchanger. In this case. as it is acting as an absorber. 4 5 Return to the main flowsheet. so there will be no stream duplication in this case. no changes are required. you will have to manually delete them after the data extraction. then select the Stream radio button in the Filter group. all of the internal streams do represent real streams in the process. there are two mixers that should be checked to see if they are isothermal.o o The Sour Gas stream does not have any exchangers on it on the main flowsheet so it will not pose any difficulties. All internal streams will be extracted as real streams. enters a heat exchanger in the main flowsheet. and click on the Worksheet tab. before it enters the mixer.we will delete . If there are streams that you do not want extracted. The Regen Bttms stream. are not the same temperature. 14 The entire flowsheet should now recalculate.com EMail:cadserv21@hotmail. and its outlet stream will be a new stream named Water to Mixer. 13 On the Design tab. Also. Click on the Worksheet tab. Click in the inlets stream cell Water to Saturate. define a new outlet stream named Mixer Outlet. and an energy stream as Q201. 3 4 5 6 7 8 9 Close the Water Cooler property view. You will now check the second mixer to see if it is non-isothermal: www. 15 Close all property views. click on the Parameters page. even if the inlet temperatures are identical.we will delete 49 . the outlet temperature can be different than the original outlet stream due to phase changes. Click the Design tab. outlet stream as Gas+H2O. Define an energy stream named Q-200. Therefore. The rest of the flowsheet will not be calculated. then click the Connections page. This is less than the original outlet temperature of the Gas + H2O stream. In the Water to Mixer Temperature field.please inform us. enter 29.44°C to make it the same as the mixer inlet stream temperature. 11 Move the cursor over the Mixer Outlet stream. The fly-by for the Mixer Outlet stream indicates that the calculated temperature is 28. delete the now unnecessary Water to Saturate stream. Add a cooler named Water Cooler. Note: The first part of the flowsheet will now calculate.69°C. and define a pressure drop of 0 kPa. 10 As per (tip 1). which is 29. and set the inlet stream as Mixer Outlet. click on the Parameters page. and define a pressure drop of 0 kPa. 12 Add a heater with the name Gas + H2O Heater. Its inlet stream is the Water In stream you just created. a heater is required between these two streams. select the Water to Mixer stream.if tort to your rights.2 Create a new material stream named Water In.cadfamily.44°C.com 4 Data Extraction from HYSYS The document is for study only. On the Design tab of the cooler property view. This should be done because. and from the drop-down list. Copy all of the information from the Water to Saturate stream by using the Define from Other Stream button. Open the Saturate mixer property view. The Water Cooler property view appears as shown in the figure below. com 50 4 Data Extraction from HYSYS The document is for study only. The entire flowsheet should solve at this point. click on the Connections page.com EMail:cadserv21@hotmail. So. This is the same as the two inlet temperatures. The fly-by for the TEG from Mixer stream indicates that the temperature calculated is 145. enter the MakeUp TEG to Mixer temperature as 145.if tort to your rights. This is the same as the other mixer inlet stream. Replace the outlet stream with a new stream TEG from Mixer.07°C. 23 Delete the now unnecessary stream MakeUp TEG. 28 Close HYSYS. On the Connections page of the Designs tab.please inform us. 25 Move the cursor over the TEG from Mixer stream. 27 If you want. 20 On the Worksheet tab.cadfamily.1°C. 26 Open the property view for the pump P-100.we will delete . you do not need to heat or cool this stream.16 Open the property view for the MakeUp mixer. Do not save over the original case. the stream MakeUp TEG must be heated up to the mixer outlet temperature. and click on the Worksheet tab. click on the Parameters page. 19 On the Design tab. replace the inlet stream TEG to Pump with the stream TEG from Mixer. you can manipulate the PFD to make it appear neater. Delete the stream TEG to Pump. create a stream named Cool MakeUp TEG based on the information in the stream MakeUp TEG. Define a new energy stream as Q-202. Set the inlet stream as Cool MakeUp TEG and define the new outlet stream as MakeUp TEG to Mixer. 24 Close all property views. and re-open the MakeUp mixer property view (if not already open). Save the modified HYSYS case (renamed in step #7 of Setting Unit Preferences). 22 On the Design tab. 17 Using the same procedure as step #2. Note: In this case. then define a pressure drop of 0 kPa. www. 21 Close the Heat MakeUp TEG heater property view. and replace the inlet stream MakeUp TEG with the stream MakeUp TEG to Mixer. 18 Add a heater named Heat MakeUp TEG. please inform us.Modify Heaters .Economic Data 4 Click the Next button.com 4 Data Extraction from HYSYS The document is for study only.Select Flowsheet . It is also important to remember that the extraction cannot perform perfectly on the first attempt. Data extraction can also be performed in HI Case. but for this tutorial you will use HI Project. The next page appears. The Extraction Wizard appears.we will delete 51 .Select File .com EMail:cadserv21@hotmail. Open a new HI Project. economic file.Modify Utilities . After the extraction is complete.Set Options . Note: The Extraction Wizard takes you through the following steps for the extraction process: . and the simulation file. the warning section will indicate that more changes are required to our HYSYS flowsheet. re-open it at this time.Modify Coolers .cadfamily. Click the Data Extraction icon . Performing the Data Extraction Performing the Initial Data Extraction 1 2 3 If you have closed Aspen Energy Analyzer.if tort to your rights. where you can select the utilities file. It is important to remember that in other cases. www. you will also have to deal with LNG exchangers.This is all of the work that will be performed on this particular case before performing the first extraction. select the HYSYS radio button. The Ignore radio button is selected in the Pumps. Aspen Energy Analyzer automatically selects the default utility and capital cost default files.if tort to your rights.com 52 4 Data Extraction from HYSYS The document is for study only.cadfamily. All checkboxes in the Live Steam group are checked.we will delete . Recycle Blocks. www. 1 Ensure that the following options are set: o o o The Only streams with phase changes checkbox is checked. accept the default selection. Click the Browse button and locate the file you saved in step #28 in Checking Mixers & Splitters. 2 3 4 In the bottom group. but you can change the selection if required. You can click the Browse button to select different files for the utility and capital cost data.com EMail:cadserv21@hotmail. 1 For the Utility File and Capital Cost File.Select File (Step 1 of 7) The data extraction process requires utility and economic information in order to perform the extraction and the costing target calculations.please inform us. and Pipe Segments group. Click the Next button to set detailed options for extraction. Set Options (Step 2 of 7) You can select different options that will affect the way in which the data is extracted. Aspen Energy Analyzer starts HYSYS running and will extract the data. Click the Next button to see the utilities to be added. When you click the Next button after setting the options.com 4 Data Extraction from HYSYS The document is for study only.please inform us.cadfamily.2 Click the Next button to select the flowsheet(s) to be extracted.com EMail:cadserv21@hotmail. www. So make sure all the checkboxes under the Selected column are checked. 2 In this tutorial. 1 Wait until the Extraction Wizard (Step 3 of 7) view appears as shown in the figure below.we will delete 53 . 3 Modify Utilities (Step 4 of 7) The utilities listed on this page are used in the extraction. you will be extracting data from all three different flowsheet.if tort to your rights. Select Flowsheet (Step 3 of 7) The data from the selected flowsheet(s) is exported. 1 If you want to modify the utilities to be added. click on the cell under the Utility column. The blue color indicates you are allowed to change the utilities. Click the Next button to see the utilities to be used with the heaters. Open the drop-down list in the cell and select the utility you want. the default utilities selected by Aspen Energy Analyzer are sufficient and do not require any modification.com EMail:cadserv21@hotmail. 2 3 4 in the You can also add more utilities by clicking the down arrow <empty> cell and selecting the new utility from the drop-down list.please inform us. click the Modify button. In this tutorial.cadfamily.we will delete . you can modify the default utility matched with each heater. Click the Next button to see the utilities to be used with the coolers. the text changes to blue color.if tort to your rights. The Modify button is replaced by the Lock button. Note: When you click the Modify button. 1 2 3 4 If you want to modify the default utility matched with each heater. In this tutorial. the text changes to black and it cannot be modified.com 54 4 Data Extraction from HYSYS The document is for study only. www. When you click the Lock button. Modify Heaters (Step 5 of 7) On this page. the default utilities selected for the heaters are sufficient and do not require any modification. you can modify the default utility matched with each cooler.cadfamily. click on the cell under the Utility column. you can see and modify the type of economic data to be used for all stream matches in the heat exchanger network. 1 2 3 4 If you want to modify the default utility matched with each cooler. the default utilities selected for the coolers are sufficient and do not require any modification.please inform us. Open the drop-down list in the cell and select the utility you want.we will delete 55 . Click the Next button to see the economic data for the heat exchangers.com EMail:[email protected] tort to your rights. Economic Data (Step 7 of 7) On this page.Modify Coolers (Step 6 of 7) On this page. In this tutorial.com 4 Data Extraction from HYSYS The document is for study only. www. The Reset button allows you to reset to the default values. Click the Next button. A message appears indicating that the HYSYS file was extracted successfully. www. to close the Heat Exchanger Capital Cost view. the default economic data the heat exchangers are sufficient and do not require any modification.1 If you want to edit the economic data for the heat exchanger.com EMail:[email protected] will delete . click the Edit Economic Data button.please inform us. The Heat Exchanger Capital Cost view appears.if tort to your rights. and Click the Close icon return to the Extraction Wizard (Step 7 of 7).cadfamily. and the Summary view appears as shown in the figure below.com 56 4 Data Extraction from HYSYS The document is for study only. 2 3 4 In this tutorial. 5 Click the Finish button. and any heat exchangers that could not be placed properly. Note: You can review the Summary view at any time in HI Project by clicking the Data Extraction Report button on the Notes tab when you select the Scenario level in the Viewer group.if tort to your rights. you will return to it and fix the problems.com EMail:[email protected] 4 Data Extraction from HYSYS The document is for study only.6 Click on the Report tab. The second section displays the utility streams that have been selected from the list of default utilities in order to satisfy the heat load on the heaters and coolers. www. The warning section should have the warnings as shown in the figure below.we will delete 57 . o The first section of the report displays the new streams that have been created in Aspen Energy Analyzer and the corresponding streams in the HYSYS case. o o 7 Close the Summary view.please inform us. Since there are still some problems in the HYSYS case. and read the report carefully. so there is not much sense in examining the data extracted at this point. The third section displays warnings of any potential problems that were found in the HYSYS case. The data will have to be extracted again after the new modifications to the HYSYS flowsheet. 5 0.com 58 4 Data Extraction from HYSYS The document is for study only.Fixing Warnings in the HYSYS Case The HYSYS case should be open because Aspen Energy Analyzer automatically opens it during the data extraction process. You should be able to reach a tolerance of 0. www.1.1. In HYSYS. o o 4 Close the Recycle property view. ensuring that the flowsheet continues to solve. as indicated in the warning. The second warning was about a temperature enthalpy reversal. Variable Vapor Fraction Temperature Pressure Flow Enthalpy Composition Tolerance 0.01 o o 3 Reduce other tolerance values. Although this will not affect the data extraction process.cadfamily. 5 Open the property view for heat exchanger E-100. it can improve the results within the HYSYS case.5 0.we will delete . The flowsheet should still solve. open the property view for this operation. The streams listed are around the heat exchanger E-100. altering the tolerances can result in an unsolved flowsheet.0. Begin by reducing the tolerance to 1.0 or less. however. o 2 The Composition tolerance is 10. Reduce the Composition tolerance.please inform us.5 0.if tort to your rights. The composition tolerance should always be 1. then click the Variables page.01 0.com EMail:[email protected] 0. Continue to reduce the tolerance by 0. Reduce the tolerances as indicated in the table below. 1 The first warning is about the tolerances on the Recycle operation. Click the Parameters tab. Some of the other tolerances are quite high. 7 To solve the problem. In the Temperature cell of the Steam Out column. since the steam is acting as the hot stream and should be cooling down in temperature.cadfamily.com EMail:cadserv21@hotmail. enter -8°C. 10 Close the E-100 property view. 8 9 In the Temperature cell of the TEG Out column. set the Steam Out temperature lower than the Steam In temperature.if tort to your rights. enter 148°C. The Steam In temperature is lower than the Steam Out temperature. This should solve the converge from wrong direction problem.we will delete 59 .6 Click the Worksheet tab. The entire flowsheet should solve.com 4 Data Extraction from HYSYS The document is for study only. www.please inform us. 11 Save the modified case and rename it newDataEXT.hsc. This does not make sense. The Status bar in the E-100 property view turns yellow and indicates a Converge From Wrong Direction problem. click on the Scenario level in the Viewer group. 1 2 In HI Project. Perform the steps in Performing the Initial Data Extraction on page 51. Select the stream Steam_In_to_Steam_Out. click the Scenario level and return to the Process Streams page on the Data tab. When the extraction Summary view appears again.if tort to your rights. Eleven streams have been extracted. however. You are now ready to extract the information from HYSYS again. this stream will become unsatisfied. as noted after step #11 in Fixing Warnings in the HYSYS Case on page 58.com EMail:cadserv21@hotmail. It should no longer display any warnings. read the report carefully. you can examine the newly create streams heat exchanger network. examine the Grid Diagram to see if there are any exchangers on this stream. In the Viewer Group. There are two options in this case. then press the Delete key on the keyboard. The first is to make E-100 a heater.Although this should now take care of the warnings listed in the Data Extraction report. which will automatically cause Aspen Energy Analyzer to select a utility for it.cadfamily. leave the HYSYS case as it is and you will manipulate the data in Aspen Energy Analyzer after the next data extraction. For now.com 60 4 Data Extraction from HYSYS The document is for study only. Steam is used in the heat exchanger E-100. then click the Process Streams page. 3 4 5 6 7 www. When the Steam stream is deleted. The second is to manually replace the heat exchanger in HYSYS with a heater. Click the Data tab. Even though this is a utility stream it will be extracted as a process stream. Before deleting the Steam stream. click on the SimulationBaseCase design. Adjusting the Extracted Data in Aspen Energy Analyzer Now that all of the HYSYS information has been extracted into Aspen Energy Analyzer. Re-extracting the data into an existing project will generate inaccurate results. Performing the Final Data Extraction You do not have to close the HYSYS case to perform the data extraction. 1 2 Create a new HI Project.please inform us. one stream will be manually deleted as it is actually a utility stream.we will delete . Leave HYSYS open and return to Aspen Energy Analyzer. locate the stream Steam_In_to_Steam_Out. In the Viewer group of the main HI Project view. On the Grid Diagram. there is one more potential problem. There is one heat exchanger on this stream that is matched with the stream TEG_only_to_TEG_out. Changes were made to the process stream data in Aspen Energy Analyzer to account for duplicate streams. The Property Presets view 12 Select Preset 6: Alphabetical. All required adjustments to the HYSYS flowsheet were performed. and the heat exchanger network was completed by adding the final heat exchanger. 13 Add a heat exchanger between the TEG_only_to_TEG_out stream and the utility stream LP steam. Close the Property Presets view. The heat exchanger will solve. 9 in the lower right-hand corner of the 10 Click the Open Palette View icon Grid Diagram tab.com 4 Data Extraction from HYSYS The document is for study only.we will delete 61 .com EMail:cadserv21@hotmail. . Return to the SimulationBaseCase design. which orders the streams alphabetically and shows the utility streams.8 Click the Utility Streams page. 15 Click the Tied checkbox for both of the cold process stream temperatures. There are utilities that have been added during the extraction process. and can continue on in the analysis of the existing network.if tort to your rights. You can now be confident that the targets calculated by Aspen Energy Analyzer are accurate. The network status bar turns green.cadfamily. so a utility will not have to be added to take into account the stream that was deleted. and all streams and heat exchangers are completely satisfied and solved. including three steam utilities.please inform us. 14 Open the heat exchanger property view. The Design Tools palette appears. The data extraction process is now complete. 11 Click the Open Property Preset View icon appears. or can perform changes to improve the network. www. and no warnings appeared in the extraction summary report. cadfamily.com 62 4 Data Extraction from HYSYS The document is for study only.www.com EMail:[email protected] tort to your rights.we will delete .please inform us. enter stream and utility information. then use the Aspen Energy Analyzer Recommend Designs feature to automatically generate heat exchanger network designs. it is highly recommended that you complete the Crude Pre-Heat Train Network tutorial on page 9 before starting this tutorial. as shown in the figure below.com EMail:[email protected] will delete 63 .com 5 Automatic HEN Design in HI Project The document is for study only. you will create an Aspen Energy Analyzer HI Project. At the Project level. If you are a new user to Aspen Energy Analyzer. To demonstrate Aspen Energy Analyzer's ability to optimize HEN designs. Within each Project.please inform us. you define what you want to design. you will build a very simple network that will be far above the target values. there can be numerous Scenarios and Designs. then use the Recommend Designs feature to optimize the network design. It is assumed that you know how to add and complete heat exchangers on the Grid Diagram tab.if tort to your rights. In this tutorial.5 Automatic HEN Design in HI Project Introduction This tutorial serves two functions: • • Introduces the Aspen Energy Analyzer Heat Integration (HI) Project environment. www. Aspen Energy Analyzer provides you with a self-contained environment where you can create a HI Project with multiple Scenarios and Designs. Demonstrates how to use the Recommend Designs feature to automatically generate Heat Exchange Network (HEN) designs.cadfamily. assumptions and specifications defined at the Scenario level.we will delete . These conditions include process stream specifications. and information required to generate a design. The Scenario level contains the assumptions.if tort to your rights. and the Worksheet pane. A Scenario can contain multiple designs. The generated designs are determined by the conditions.please inform us. the Main pane. utility streams. and economic factors. The three sections are displayed and labeled in the figure below.com EMail:[email protected] Project level contains only the most general description of the problem set being examined. conditions. Navigating Through HI Project The Heat Integration Project View The Heat Integration Project view in Aspen Energy Analyzer is divided into three sections: the Viewer group.com 64 5 Automatic HEN Design in HI Project The document is for study only. The Design level contains the generated HEN design solutions. www.cadfamily. click on the + or . Aspen Energy Analyzer automatically creates a Scenario and Design level.com 5 Automatic HEN Design in HI Project The document is for study only.Viewer Group The Viewer group is always visible in the Heat Integration (HI) Project view and contains the Aspen Energy Analyzer tree browser. You cannot delete the default Scenario and Design levels.cadfamily. www. which is used to access. To expand or compress the tree.beside the level you want to view.com EMail:[email protected] tort to your rights.please inform us.we will delete 65 . create and delete Scenario and Design levels within a HI Project. When you create a new HI Project. Click the Calculate button. For more information. Use this tab to manipulate the utility load allocation method and access the utility and HTC databases. or DTmin. The options on this tab are useful for determining the optimal minimum approach temperature. All three pages on this tab contain the target values calculated by Aspen Energy Analyzer.cadfamily. Here. you enter all process and utility stream data and set the cost parameters.Main Pane At the Scenario level. Worksheet Pane The Worksheet pane of the HI Project view displays the entered and calculated values. the Main view displays the Heat Exchanger Network (HEN) diagram. The following sections describes some of the commonly used tabs available at the Scenario and Design levels of the HI Project view. Use this tab to compare all designs within a Scenario. value. you can display all designs or display only completed designs. You can select the type of plot to display from a drop-down list at the top of the view. the Main pane displays a plot.please inform us.we will delete . and use the plot or the table to find the DTmin value for a minimum area or minimum cost value. You can also display the designs as a percentage related to the target values. Designs tab Options tab Notes tab www.com 66 5 Automatic HEN Design in HI Project The document is for study only. At the Design level. Use this tab to enter notes for the Scenario level.com EMail:[email protected] tort to your rights. Tab Data tab Targets tab Range Targets tab Description On this tab. Scenario Level The following table lists and describes the tabs found at the Scenario level. These values represent the performance of an ideal heat exchanger network design for the entered stream and economic data. refer to Range Targeting on page 19. both at the Scenario and Design levels. if tort to your rights. This tab displays detailed information about each heat exchanger. which automatically records and displays all modifications made to the Grid Diagram.Design Level To view the Design level. This tab shows all the same targets information available at the Scenario level. To view a design. click the design name. This tab also contains a Modification Log page.com EMail:cadserv21@hotmail. To do this. The Main pane now displays a Grid Diagram instead of a plot. click the + beside the Scenario folder. Any designs contained within the Scenario appear in the tree. The following table lists and describes the tabs found at the Design level. Now that you have an understanding of the setup and structure of the HI Project views. Tab Performance tab Worksheets tab Heat Exchangers tab Targets tab Notes tab Description This tab displays the performance information for all heat exchangers and utilities in the design.com 5 Automatic HEN Design in HI Project The document is for study only. you are ready to begin the tutorial. This tab displays notes for a particular design. When the checkbox is unchecked. When the Show All checkbox is checked. expand the tree in the Viewer group. this tab shows all heat exchangers.we will delete 67 . this tab provides an alternative way to manipulate the heat exchangers on the Grid Diagram.please inform us. www.cadfamily. only solved exchangers appear. As in HI Case. The Session Preferences view appears. A drop-down list appears containing various unit options as shown in the figure below. Setting Unit Preferences In this section. the temperatures are in Celsius. select kJ/s.cadfamily. you will define a new unit set.Creating a HI Project for Automatic Design Generation In the following sections you will set unit preferences. 1 2 3 4 Start the Aspen Energy Analyzer program. From the Tools menu. and the MCp is in kJ/C-s. if it is not already open. and enter process and utility stream data. scroll to the MCp cell. then click the Clone button. In the Display Units group. select the unit set SI. rename the New User set to Application 2 Units. Click the Variables tab. select Preferences. the HI Project must contain all required process stream data and utility streams that are sufficient to satisfy the energy demands of the process streams. scroll down the list to find the Energy units cell. For this tutorial.if tort to your rights. 8 9 From the drop-down list.we will delete . so in some cases you can choose which units you want to display.com 68 5 Automatic HEN Design in HI Project The document is for study only. Note: The unit kJ/s is equal to kW. 5 6 7 In the Unit Set Name field. then select the Units page.com EMail:cadserv21@hotmail. In the Available Unit Sets list. www. The default unit is kJ/h.please inform us. create the HI Project. In the Display Units group. This will create a cloned unit set named New User. click the down arrow. In the Energy unit cell. To use Aspen Energy Analyzer’s Recommend Design feature. enter a file name and location. 13 Click the Close icon to close the Session Preferences view. On the Save Preference To save. which will allow you to use it for future cases. 11 Scroll through the rest of the list and change the units for the following variables: o o o o o Ht Tran Coeff (kJ/s-m2-C) Heat Flux (kJ/s-m2) Fouling (C-m2/kW) Enthalpy per Length (kJ/s-m) Power (kJ/s) Although some of these variables may not be used.10 In the MCp cell.com 5 Automatic HEN Design in HI Project The document is for study only. it is always a good idea to keep all of the units consistent. it is not recommended. select HI Project. In the left list. from the Managers menu. select HeatIntegrationProject. do one of the following: • • From the Features menu. Creating the HI Project In this section you will create the Heat Integration (HI) Project. To access the HI Project view. www. then click the Save button. click the drop-down arrow and select kJ/C-s.cadfamily. then click the Add button.please inform us.com EMail:cadserv21@hotmail. Click the Heat Integration Manager icon . The manager view appears. Although you can overwrite the default preference set included with Aspen Energy Analyzer.we will delete 69 . 12 Optional: At this point you can save the newly created preference set. . or. click the Save Preference File icon File view. select Heat Integration Manager. The HI Project view appears.if tort to your rights. Type h1. then select the appropriate units from the drop-down list. Aspen Energy Analyzer automatically converts the value to the default units. www. The default units that appear in the unit drop-down list are already the desired unit.com 70 5 Automatic HEN Design in HI Project The document is for study only.please inform us. Data tab. type the known temperature in the cell. then press the enter key.com EMail:cadserv21@hotmail. enter 80°C. if you enter 176°F. click on **New**. a blue arrow indicates a cold stream. 5 6 7 In the MCp cell. 1 2 3 4 Ensure that you are in the Scenario view. In the Name column. In the Outlet T cell. Process Streams page. Aspen Energy Analyzer knows if the stream type is hot or cold.4 kJ/s-m2-C. as shown in the figure below.Entering Process Stream Data In this section you will enter data for the all the process streams. A red arrow indicates a hot stream. In the HTC cell. so they do not need to be changed.cadfamily.we will delete . A red or blue arrow appears in the second column.if tort to your rights. Aspen Energy Analyzer converts this value to 80°C. The cursor automatically moves to the Inlet T cell. enter 0. In the Inlet T cell enter 230°C. degrees Celsius. If you know the temperature in a unit other than the default. enter 30 kJ/°C-s. Next you will add more streams to the HI Project. After you enter the inlet and outlet temperatures. For example. 4 0.4 0.1 0.4 0.1 0.1 0.1 0.1 0. Name h2 c3 c4 h5 h6 h7 h8 h9 h10 c11 c12 c13 c14 c15 h16 h17 h18 h19 h20 h21 c22 c23 c24 c25 c26 h27 h28 Inlet T (°C) 200 40 140 110 115 105 110 117 103 170 175 180 168 181 110 115 105 110 117 103 170 175 180 168 181 115 117 Outlet T (°C) 40 180 280 45 40 40 42 48 50 270 265 275 277 267 45 40 40 42 48 50 270 265 275 277 267 42 43 MCp (kJ/°C-s) 45 40 60 0.1 0.4 0.4 0.cadfamily.1 0. Shenoy (1995).1 0.4 0.4 0.4 0. The stream information provided is from U.4 0.1 0.4 0.com EMail:[email protected] 0.if tort to your rights.1 0.Using the procedure you just learned.1 0.1 0.please inform us.4 0.4 0.4 0.1 0.1 0.4 0.4 0.1 0.4 0.com 5 Automatic HEN Design in HI Project The document is for study only.1 0.4 8 Verify that the information you just entered on the Process Streams page matches the figures in the table above.4 0.1 0.4 0.4 0.1 0. enter the data for following process streams.1 0.4 0.1 0.4 0.4 0. www.1 0.1 HTC (kJ/s-m2-C) 0.1 0.4 0.1 0.we will delete 71 .4 0.4 0. 1 On the Data tab. then press enter.if tort to your rights.com 72 5 Automatic HEN Design in HI Project The document is for study only. In the Name column. 2 3 4 5 6 7 8 9 10 Verify that the information on the Utility Streams page appears similar to the figure below.4. Click in the Outlet T cell and enter 350°C. In the Inlet T cell. you will specify all the required heating and cooling utilities for the HEN design. select the Utility Streams page. which means there are not enough cold and hot utilities to satisfy the process streams. The hot and cold status bars at the bottom of the tab display "insufficient". Since the cost information for the utility is unknown and Aspen Energy Analyzer requires cost information for each utility.com EMail:cadserv21@hotmail. Now you will define the cold utility.cadfamily. enter 0. This is the minimum information required for a utility. At least one set of economic data must be available for the calculation of the www.please inform us. click in the <empty> cell and type cu. In the HTC cell. enter 50°C. enter 10°C.4. which means that the hot utility entered has enough energy to heat all of the cold process streams. select the Economics page. Click in the Inlet T cell and enter 400°C. Click in the HTC cell and enter 0. click in the <empty> cell. use the default value. The hot utility is now sufficient.we will delete . Aspen Energy Analyzer supplies a default set of economic parameters.Entering Utility Stream Data In this section. First you will define the hot utility. In the Outlet T cell. Type hu. In the Name column. 11 On the Data tab. economics or forbidden matches. The Recommend Designs view appears as shown in the figure below. utility streams.com 5 Automatic HEN Design in HI Project The document is for study only. In the Preview Input group.com EMail:cadserv21@hotmail. Right-click the mouse button on the selected Scenario. You can then compare the designs and make any modifications required. 3 From this menu. you can preview any of the input values for the process streams. select Recommend Designs. In the Solver Options group. Aspen Energy Analyzer lets you control how many designs are generated. in the Stream Split Options group. you can set the maximum number of branch splits. leave all current default values as they are. use the default values.capital cost targets and network capital costs. This view allows you to control certain aspects of the automatic design feature. 4 5 On the General tab. 6 www. change the maximum number of designs to 5.if tort to your rights. For this tutorial. For this tutorial. 1 2 In the Viewer group. The following menu appears.please inform us. Generating HEN Designs In this section you will use Aspen Energy Analyzer's Recommend Designs feature to automatically generate HEN designs.cadfamily. click on the Scenario level.we will delete 73 . Accept the current default values. com 74 5 Automatic HEN Design in HI Project The document is for study only.if tort to your rights.cadfamily. it appears as though A_Design3 has the smallest total cost index. The view should appear similar to the figure below. click the Designs tab.com EMail:cadserv21@hotmail. This minimal area has been made possible by exceeding the utility energy targets. the time required for the calculations increases with the number of designs. click the design level A_Design3. Aspen Energy Analyzer will begin automatically creating heat exchanger networks. Note: All generated designs will have a name that starts with "A_". If you have time and want to calculate more. For learning purposes. 10 In the Viewer group. Note: Depending on your settings. and vice-versa. change the maximum design value to the necessary number. Depending on the speed of your system. 7 Click the Solve button. This will show all the key variables as a percentage of the calculated target value. click on the design that has the smallest total cost index. indicating that these have been automatically generated by Aspen Energy Analyzer. five will be sufficient. In most cases this will be true. you may have slightly different results in the list of recommended designs.please inform us. 11 On the Notes tab.Note: Aspen Energy Analyzer is capable of solving for more than five designs. 8 At the Scenario level. From the previous figure. then check the Relative to target checkbox. select the Modification Log page. but area values less than the target values. Aspen Energy Analyzer sorts the results by Total Cost Index. however. and A_Design5 has the smallest total area. 9 From the figure above.we will delete . to minimize area you must increase utility consumption. this could take up to ten minutes to complete. This page displays all the actions performed by Aspen Energy Analyzer during the creation of this network design. www. For the step above. some of the designs recommended have total cost indexes higher than the target values. V.please inform us.. www. U.cadfamily. Heat Exchanger Network Synthesis: Process Optimization by Energy and Resource Analysis. if you had a design that was not already minimized for area or cost. however.we will delete 75 .com 5 Automatic HEN Design in HI Project The document is for study only. you can optimize the design by using the retrofit options described in the next chapter. Gulf Publishing Company. USA.com EMail:cadserv21@hotmail. References Shenoy. 1995. Houston.All of the designs generated by Aspen Energy Analyzer are optimal for the given network structure.if tort to your rights. please inform us. You will start by creating a heat exchanger network (HEN) in the HI Project environment.cadfamily.we will delete . you will use four methods: • • • • modifying utility exchangers resequencing heat exchangers repiping heat exchangers adding heat exchangers HEN retrofit focuses on modifying an existing heat exchanger network to improve energy efficiency. The design engineer can apply constraints during the design process that will affect the retrofit calculations. During the retrofit. you will use the Automatic Retrofit feature of Aspen Energy Analyzer. you will enter the Automatic Retrofit environment to retrofit the HEN. Note: It is assumed that you know how to add and complete heat exchangers on the Grid Diagram.com 76 6 Heat Exchanger Network Retrofit The document is for study only. Then.if tort to your rights. The design engineer also has to assess the operational safety and practicality of the optimal designs generated by Aspen Energy Analyzer. In the past.com EMail:cadserv21@hotmail. the design engineer is required to choose one type of modification at a time. HEN retrofits using Pinch technology required an expert user. and the Mathematical programming method reduced the interaction between the design engineer and Aspen Energy Analyzer. Within the retrofit environment. Aspen Energy Analyzer performs the HEN Retrofit algorithm one step at a time so the engineer may still control the decision making process. www.6 Heat Exchanger Network Retrofit Introduction In this tutorial. The default energy units appear in the units of kJ/h. 1 2 3 4 Open Aspen Energy Analyzer if it is not already open. Setting Unit Preferences Before you begin. Click the Variables tab. With the unit set SI selected. 11 In the MCp cell. the temperatures are in degrees Celsius. In the Available Unit Sets group. so.if tort to your rights. select the unit set SI. In the Unit Set Name field.we will delete 77 . In the Energy units cell. A drop-down list appears containing various unit options as shown in the figure below. www.Creating an HI Project for Retrofit The following sections describe how to create a HEN design within the HI Project environment. select kJ/s. For this tutorial. scroll down the list to find the Energy units cell. then select the Units page. scroll to the MCp cell. you will need to define a new unit set. The default unit is kJ/h. From the Tools menu. 5 6 7 8 9 From the drop-down list. In the Display Units group. click the drop down list and select kJ/C-s. click the down arrow.please inform us. 10 In the Display Units group. verify that the units currently selected in the session preferences are the ones you want to use. This will create a cloned unit set named New User. rename the New User set to Application 3 Units. click the Clone button.com 6 Heat Exchanger Network Retrofit The document is for study only.cadfamily. The Session Preferences view appears. select Preferences.com EMail:cadserv21@hotmail. and the MCp is in kJ/°C-s. . so in some cases you can choose which units you want to see displayed. The manager view appears.com EMail:cadserv21@hotmail. it is not recommended. The HI Project view appears. select HeatIntegrationProject.if tort to your rights. In the left list. Click the Heat Integration Manager icon select Heat Integration Manager. Although you can overwrite the default preference set included with Aspen Energy Analyzer.cadfamily. click the Save Preference Set icon File view. which will allow you to use it in future cases. Creating the HI Project Now you will create the Heat Integration (HI) Project in Aspen Energy Analyzer. . 13 Optional: At this point you can save the newly created preference set.com 78 6 Heat Exchanger Network Retrofit The document is for study only. select HI Project. then click the Add button. it is always a good idea to keep all of the units consistent. To access the HI Project view. or.please inform us. then click the Save button. from the Managers menu.we will delete . Although some of these variables might not be used. enter a file name and location. On the Save Preference To save.12 Scroll through the rest of the list and change the units for the following variables: o o o o o Ht Tran Coeff (kJ/s-m2-C) Heat Flux (kJ/s-m2) Fouling (C-m2/kW) Enthalpy per Length (kJ/s-m) Power (kJ/s) The unit kJ/s is equal to kW. www. do one of the following: • • From the Features menu. Aspen Energy Analyzer generates a default heat transfer coefficient value for the HTC cell.cadfamily. enter 45°C. you will segment this stream and add other streams to the HI Project. Segmenting Process Streams The H1 stream requires an enthalpy or heat capacity value to be complete. which contains a list of default heat transfer coefficients for various materials. For this tutorial. Aspen Energy Analyzer converts this value to 45°C. then select the appropriate units from the drop-down list. If you know the temperature in a unit other than the default. you will use the default coefficient values generated by Aspen Energy Analyzer. Accept the default value or select a new default value. Stream segmentation is extremely useful for streams that change phase or have non-linear variations in enthalpy as the temperature changes. In this section you will add streams and segment some of the streams. All other information is optional. 1 2 3 In the Name column. Next. a blue arrow indicates a cold stream. The cursor automatically moves to the Inlet T cell.com EMail:[email protected] 6 Heat Exchanger Network Retrofit The document is for study only. A red arrow indicates a hot stream. For example.3°C.we will delete 79 . When you enter this information. 4 5 In the MCp cell. you will enter data for the process streams on the Process Stream page on the Data tab. Aspen Energy Analyzer automatically converts the value to the default units. so they do not need to be changed. Note: Double-click in the HTC column to open the HTC Default Values view. Type H1.if tort to your rights. The default units that appear in the unit drop-down list are already in degrees Celsius. enter 347. www. In the Inlet T cell. A red or blue arrow appears in the second column.please inform us. type the known temperature in the cell.Entering the Process Stream Data In this section.1 kJ/°C-s. After you enter the inlet and outlet temperatures. click on **New**. as shown in the figure below. In the Outlet T cell. then press the Enter key. enter 180. if you enter 113°F. Aspen Energy Analyzer knows if the stream type is hot or cold. A blank row appears above the target outlet temperature. Click the Insert Segment button.7°C.com EMail:[email protected] kJ/°C-s.we will delete .com 80 6 Heat Exchanger Network Retrofit The document is for study only.3. enter the following stream information. 5 6 7 Click the Close icon to return to the Data tab of the HI Project view. 4 The outlet temperature of the first segment is 202. The MCp for the first segment is 217. Now that you know how to successfully enter process stream information and create segmented streams.0.if tort to your rights. Note: The blank segment row always appears above the row containing the cursor.1 In the H1 stream row. Aspen Energy Analyzer automatically inserts the inlet temperature for the following segment. The process stream is complete as shown in the figure below. Click in the empty MCp cell and enter 217. 2 3 Click once in the Outlet T cell containing the value 45. Click in the empty Outlet T cell and enter 202.cadfamily. www. double-click on any cell (except HTC) to open the Process Stream view. This is the target outlet temperature.please inform us.7. Notes: Enter only the Outlet T values and the MCp values; the Inlet T values are calculated for you. Enter the stream name, first Inlet T value and the target (last) Outlet T value on the Process Streams tab before accessing the Process Stream view to enter the segment information. Stream Name H2 H3 H4 H5 H6 H7 H8 Inlet T (°C) 319.4 297.4 203.2 263.5 248.0 143.7 231.8 176.0 167.1 116.1 146.7 133.3 120.0 99.9 H9 H10 C11 C12 73.2 73.2 232.2 274.3 30.0 108.1 211.3 C13 226.2 228.7 Outlet T (°C) 244.1 203.2 110.0 180.2 143.7 50.0 176.0 120.0 116.1 69.6 133.3 120.0 99.9 73.2 30.0 40.0 274.3 343.3 108.1 211.3 232.2 228.7 231.8 MCp (kJ/°C-s) 136.2 22.08 19.76 123.1 67.41 58.11 51.14 46.49 172.0 158.1 233.6 202.2 169.7 338.2 6.843 57.69 471.9 498.6 333.6 381.2 481.2 352.2 425.4 Verify that the information on the Process Streams page appears similar to the following figure. www.cadfamily.com EMail:[email protected] 6 Heat Exchanger Network Retrofit The document is for study only,if tort to your rights,please inform us,we will delete 81 Entering Utility Stream Data In this section, you will specify all the required heating and cooling utilities for the HEN design. 1 Click on the Data tab, then click on the Utility Streams page. Note: The hot and cold status bars at the bottom of the tab displays "insufficient", which means that there are not enough cold and hot utilities to satisfy the process streams. 2 In the Name Column, click on <empty>. A drop-down arrow becomes active. 3 Click the arrow, and a drop-down list appears containing all of the default utilities available within Aspen Energy Analyzer. 4 Select the following default utilities from the list: o o o o o o Cooling Water Fired Heat (1000) - If a warning box appears, click OK. HP Steam LP Steam Generation MP Steam MP Steam Generation Note: You can change or define economics parameters on the Economics page of the Data tab. Refer to step #6. 5 Verify that the information on the Utility Streams page appears similar to the figure below. www.cadfamily.com EMail:[email protected] 82 6 Heat Exchanger Network Retrofit The document is for study only,if tort to your rights,please inform us,we will delete 6 On the Data tab, click on the Economics page. Aspen Energy Analyzer supplies a default set of economic parameters for a typical heat exchanger. Here, you can change or add another type of installation cost and area-related cost law coefficient if required. At least one set of economic data must be available for the calculation of the capital cost targets and network capital costs. For this tutorial, you will use the default values. Building the Heat Exchanger Network In this tutorial, you will add heat exchangers only to the heat exchanger network. Splitters are not required. Accessing the Design Level To build the HEN diagram, you must enter the Design level of the HI Project view. 1 2 In the Viewer group, click on the + beside Scenario 1 to expand the tree. Click on the design named Design 1. The view appears as shown in the figure below. www.cadfamily.com EMail:[email protected] 6 Heat Exchanger Network Retrofit The document is for study only,if tort to your rights,please inform us,we will delete 83 . Click the Annotations tab.com 84 6 Heat Exchanger Network Retrofit The document is for study only. then select Properties from the Object Inspect menu. Select Preset 4: (Temperature). From the drop-down list. click the Middle drop-down list. Click the Open Property Preset View icon o Right-click on the Grid Diagram. you will add heat exchangers to the network design. In the Heat Exchangers group. The stream name will now appear in the Grid Diagram.Setting the Grid Diagram View Options To modify the appearance of the heat exchanger network design in the Grid Diagram: 1 Open the Property Presets view by doing one of the following: o Click the Open Palette View icon . The Design Tools palette must be visible before you can add heat exchangers. The heat exchanger appears as a solid red dot. The Property Preset: Preset 4: (Temperature) view appears. In the Design Tools palette. Close both the Property Presets and Property Preset: Preset 4: (Temperature) views to return to the HI Project view. then click the Edit button.if tort to your rights. select Name.cadfamily. 3 4 5 6 Adding Heaters In this section. right-click and hold on the Add Heat Exchanger icon . 2 The Property Presets view appears. 1 2 3 Press f4 to open/access the Design Tools palette. www. The Design Tools palette appears.com EMail:[email protected] inform us. 4 Release the mouse button.we will delete . Drag the cursor over the C11 stream until the Bull's eye icon appears. the heat exchanger is red. then select MW from the units list.cadfamily. Since this is a heater. 12 In the Duty field. www.com EMail:[email protected] To attach the heat exchanger to the Fired Heat (1000) stream. Click the Notes tab. 11 On the Data tab. 6 7 8 9 10 Click the Data tab. enter 37. Double-click either end of the heat exchanger (the red dots) to open the Heat Exchanger property view. then drag the cursor to the Fired Heat stream.if tort to your rights. enter HU1.com 6 Heat Exchanger Network Retrofit The document is for study only. Click the Tied checkbox for the C11 cold stream outlet temperature.9. Note: Since the C11 stream is being heated to the known outlet temperature. Release the mouse button. The heat exchanger appears.we will delete 85 . A light blue dot will appear underneath the cursor as you drag it to the new stream. The heat exchanger property view appears as shown in the figure below. click and hold on the red dot. In the Name field. you can “tie” the cold stream outlet temperature value to the outlet temperature value you entered on the Process Streams tab.please inform us. Note: When placing heat exchangers on the stream.if tort to your rights.we will delete .8 www.com 86 6 Heat Exchanger Network Retrofit The document is for study only.please inform us. while the cold streams flow from right to left. Cold Stream (°C) Inlet T Outlet T Tied Tied Tied Name HU2 HU3 Streams C12 & HP Steam C13 & HP Steam Location of Heat Exchanger Place on C12 stream Place on C13 stream Duty (MW) 27. remember that the hot streams flow from left to right.The heat exchanger solves.com EMail:cadserv21@hotmail. and the view appears as shown in the figure below.cadfamily. 13 Use the procedure you just learned and the data in the table below to add the other heaters. you will add heat exchangers to the Grid Diagram. click and hold on the red dot. 10 Click the Data tab. Click the Notes tab.cadfamily. To attach the heat exchanger to the C12 stream.if tort to your rights.we will delete 87 .com 6 Heat Exchanger Network Retrofit The document is for study only. Note: You know from the stream information you entered on the Process Streams tab that the inlet hot stream temperature for E1 is the same as the initial stream temperature for H6. Note: Remember that cold streams flow from right to left. Drag the cursor over the H6 stream until the Bull's eye icon appears. 4 5 Release the mouse button. 11 Click the Tied checkbox for the inlet hot stream temperature."Tied" indicates that you must check the Tied checkbox as indicated. 7 8 9 Double-click either end of the heat exchanger (the gray dots) to open the Heat Exchanger property view. A blank cell in the table above indicates that Aspen Energy Analyzer will calculate the value.please inform us. Place the new heat exchanger upstream from (to the right of) HU2 on the C12 stream. The heat exchanger appears. www. enter E1. 1 2 3 Press f4 to open/access the Design Tools palette. In the Design Tools palette. 6 Release the mouse button. A light blue dot will appear underneath the cursor as you drag it to the new stream. right-click and hold on the Add Heat Exchanger icon . then drag the cursor to the C12 stream. In the Name field. The heat exchanger appears as a solid red dot.com EMail:cadserv21@hotmail. Adding Heat Exchangers In this section. A blank cell indicates that Aspen Energy Analyzer will solve the value. right-click either end of the exchanger and select Delete from the Object Inspect menu. Note: When placing heat exchangers on the stream. If you make an error and need to delete a heat exchanger. 14 Use the procedure you just learned and the data in the table below to add the rest of the heat exchangers and coolers to the Grid Diagram.please inform us. www.cadfamily. while the cold streams flow from right to left. enter 0.com EMail:[email protected] will delete . The heat exchanger solves.7 MW.if tort to your rights. "Tied" indicates that you must check the stream Tied checkbox. 13 In the Duty field. remember that the hot streams flow from left to right. This is important when placing heat exchangers `before' or `after' other exchangers in the design.12 Click the Tied checkbox for the outlet cold stream temperature.com 88 6 Heat Exchanger Network Retrofit The document is for study only. before HU1 Place on C11 stream. before E4 E6 H3 & C12 Place on H3 stream. before E5 CU1 CU2 CU3 CU4 CU5 CU6 CU7 CU8 CU9 H3 & Cooling Water H6 & Cooling Water H10 & Cooling Water H5 & Cooling Water H9 & Cooling Water H7 & Cooling Water H8 & Cooling Water H2 & MP Steam Generation H4 & LP Steam Generation Place on H3 stream. There might be some variation in the heater placement. after E4 Place on C12 stream.7 Tied Tied Tied After entering the information in the table above. after E1 Place on H10 stream Place on H5 stream Place on H9 stream Place on H7 stream Place on H8 stream Place on H2 stream Place on H4 stream Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Tied Inlet T Tied Outlet T Cold Stream (°C) Inlet T Outlet T Tied Load/ Duty (MW) 15.we will delete 89 .com EMail:[email protected] Stream (°C) Name E2 Streams H1 & C11 Location of Heat Exchanger Place on C11 stream. the Grid Diagram should appear as shown in the figure below. before E2 Place on H3 stream.com 6 Heat Exchanger Network Retrofit The document is for study only. before E1 E5 H1 & C12 Place on H1 stream. www.cadfamily.if tort to your rights. after E6 Place on H6 stream.2 E3 E4 H3 & C11 H3 & C12 Tied Tied Tied Tied Tied 0. after E3 Place on C12 stream. after E2 Place on C12 stream.please inform us. 1 2 In the Viewer group.we will delete . select Scenario 1.com EMail:cadserv21@hotmail. Click the Enter Retrofit Mode icon of the view.Performing the Retrofit Entering the Retrofit Environment In this section.cadfamily.please inform us. you will use Aspen Energy Analyzer's retrofit tools to generate optimal HEN designs.com 90 6 Heat Exchanger Network Retrofit The document is for study only. located at the bottom right corner The Enter Retrofit Environment view appears. as shown in the figure below.if tort to your rights. www. com EMail:[email protected] will delete 91 .Note: While you are in the Retrofit Mode you cannot make any changes to the design and stream information. the problem becomes easier to solve. The Tips tab contains the following information: o Reduce the scope of the problem by minimizing the number of streams and heat exchangers in the heat exchanger network. www. This has no effect in the final outcome but makes the solver work more efficiently.please inform us. This can simplify the network and increase the efficiency of the model. Remove the exchanger(s) at either end of the streams that you don't want to modify and update the corresponding inlet or outlet stream temperatures. By removing them. Remove all energy streams.if tort to your rights. The following view appears (Performance tab.cadfamily. Keep stream segmentation to a minimum as they increase the computational power required to solve the problem. Summary page). Energy streams are important to establish the targets of a process but are not necessary to perform a retrofit study. This will ensure that accurate and meaningful designs are generated when retrofit is performed. Combine adjacent heat exchangers between two process streams into one heat exchange when possible.com 6 Heat Exchanger Network Retrofit The document is for study only. o o o Note: Verify that the heat exchanger network represented in Aspen Energy Analyzer matches the setup that exists in the plant before entering the retrofit environment. 3 Click the Enter Retrofit Environment button. 1 2 3 In the Viewer group. Click the Open Palette View icon . you can do the following: www.com EMail:cadserv21@hotmail. Click the Open Palette View icon. click the Move one end of a Heat Exchanger icon . The Design Tools palette appears. On the Design Tools palette. In this example.if tort to your rights.cadfamily.we will delete . On the Design Tools palette.please inform us.com 92 6 Heat Exchanger Network Retrofit The document is for study only. The view for Scenario 1 1 appears. The Retrofit Specifications view appears. 4 5 6 7 Click the OK button to close the view. The Design Tools palette appears. The following view will appear if Aspen Energy Analyzer calculates a cost above what you entered in the previous step. select Design 1 under Scenario 1 1 (blue folder) again.HEN Retrofit . it is not optimal to modify any of the utility heat exchangers. 9 In this view. Entering a value here helps ensure that Aspen Energy Analyzer will generate retrofit solutions. In the Viewer group.Resequencing Heat Exchangers In this section you will generate a retrofit design by resequencing the heat exchangers. click the Modify utility heat exchanger icon . The following view appears. enter a capital cost investment value. Aspen Energy Analyzer begins retrofit calculations. 8 In the Maximum Investment field. select Design 1 under Scenario 1 1 (blue folder). Leave the field blank if you want to see if Aspen Energy Analyzer can generate a solution requiring no capital investment. Click the Run button. Click the Open Palette View icon icon . 11 In the Viewer group. click Keep Design. select Design 1-1S. 5 www. On the Design Tools palette.o o o Click Delete Design to exit the calculation and delete the design.please inform us. Note: To display the exchanger names in the new design. refer to the previous Setting the Grid Diagram View Options section. The Design Tools palette appears.com EMail:cadserv21@hotmail. click the Move both ends of a Heat Exchanger . Click Recalculate and enter a new Maximum Investment value. Verify that the Grid Diagram appears similar to the view below. The Retrofit Specifications view appears.cadfamily. Click Keep Design to finish the calculation and keep the design. 10 For this tutorial.if tort to your rights. The following view will appear if Aspen Energy Analyzer calculates a cost above what you entered in the previous step. Entering a value here helps ensure that Aspen Energy Analyzer will generate retrofit solutions. Leave the field blank if you want to see if Aspen Energy Analyzer can generate a solution requiring no capital investment. Click the Run button. HEN Retrofit . Aspen Energy Analyzer begins retrofit calculations. select Design 1 under Scenario 1 1 (blue folder). A new design called Design 1-1S appears in the Viewer group. 4 In the Maximum Investment field. enter a capital cost investment value.we will delete 93 .Repiping Heat Exchangers 1 2 3 In the Viewer group.com 6 Heat Exchanger Network Retrofit The document is for study only. select Design 1 under Scenario 1 1. HEN Retrofit .In this view. . you can do the following: o o o Click Delete Design to exit the calculation and delete the design. click the Add a Heat Exchanger icon Retrofit Specifications view appears.we will delete .if tort to your rights. 4 In the Maximum Investment field. Click Recalculate and enter a new Maximum Investment value. click Keep Design. refer to the previous Setting the Grid Diagram View Options section. 6 For this tutorial.please inform us. The Design Tools palette appears. Entering a value here helps ensure that Aspen Energy Analyzer will www.com EMail:[email protected] 94 6 Heat Exchanger Network Retrofit The document is for study only. Verify that the Grid Diagram appears similar to the view below. A new design called Design 1-1P appears in the Viewer group. Click Keep Design to finish the calculation and keep the design. Note: To display the exchanger names in the new design. 7 In the Viewer group. enter a capital cost investment value.cadfamily.Adding Heat Exchangers 1 2 3 In the Viewer group. The On the Design Tools palette. Click the Open Palette View icon . select Design 1-1P. click Keep Design.cadfamily.if tort to your rights.generate retrofit solutions. refer to the previous Setting the Grid Diagram View Options section. Click Keep Design to finish the calculation and keep the design. Click the Designs tab. The following view will appear if Aspen Energy Analyzer calculates a cost above what you entered in the previous step. Aspen Energy Analyzer begins retrofit calculations. www.we will delete 95 .com 6 Heat Exchanger Network Retrofit The document is for study only. you can do the following: o o o Click Delete Design to exit the calculation and delete the design. select Design 1-1N. 1 2 In the Viewer group. you can compare each design and decide which one best suits the project requirements. The following worksheet appears. Click Recalculate and enter a new Maximum Investment value. The values displayed may be different than what appears below. Leave the field blank if you want to see if Aspen Energy Analyzer can generate a solution requiring no capital investment. 6 For this tutorial. 5 Click the Run button.please inform us. select Scenario 1 1. 7 In the Viewer group.com EMail:cadserv21@hotmail. Comparing Designs Now that Aspen Energy Analyzer has generated three possible design improvements. In this view. A new design called Design 1-1N appears in the Viewer group. Verify that the Grid Diagram appears similar to the view below. Note: To display the exchanger names in the new design. com EMail:[email protected] Designs worksheet displays data on the original and all the retrofit generated designs.if tort to your rights. 3 Click the checkbox beside Relative to base design to view the above data with percent values relative to the original HEN design.please inform us. All modification changes are compared to the base case design. www. You can change the economic parameters on the Economics page of the Data tab.cadfamily.com 96 6 Heat Exchanger Network Retrofit The document is for study only.we will delete . For each retrofit generated design you can compare the following: o o o o o the payback of the generated design new area required capital investment required energy consumption reduction operation costs reduction Remember that all estimated cost values are based on the Aspen Energy Analyzer default economic parameters. www.cadfamily.if tort to your rights.com EMail:[email protected] inform us.we will delete 97 .com 6 Heat Exchanger Network Retrofit The document is for study only.