Aspen Energy Analyzer Tutorial - baixardoc

Aspen Energy

Analyzer

Tutorial Guide

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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.

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Phone: (781) 221-6400

Toll free: (888) 996-7001

Website http://www.aspentech.com



Contents iii

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


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



iv Contents

5 Automatic HEN Design in HI Project...................................................................63

Introduction .................................................................................................63

Navigating Through HI Project ..............................................................64

Creating a HI Project for Automatic Design Generation .......................................68


Creating the HI Project.........................................................................69

Entering Process Stream Data...............................................................70


Generating HEN Designs ................................................................................73

References ...................................................................................................75

6 Heat Exchanger Network Retrofit.......................................................................76

Introduction .................................................................................................76

Creating an HI Project for Retrofit ...................................................................77


Creating the HI Project.........................................................................78

Entering the Process Stream Data..........................................................79


Building the Heat Exchanger Network.....................................................83

Performing the Retrofit ..................................................................................90

Entering the Retrofit Environment..........................................................90

HEN Retrofit - Resequencing Heat Exchangers ........................................92

HEN Retrofit - Repiping Heat Exchangers ................................................93

HEN Retrofit - Adding Heat Exchangers ..................................................94

Comparing Designs .......................................................................................95



1 Technical Support 1

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.aspentech.com

You use the Online Technical Support Center to:

• Access current product documentation.

• Search for technical tips, solutions, and frequently asked questions

(FAQs).

• Search for and download application examples.

• Search for and download service packs and product updates.

• Submit and track technical issues.

• Search for and review known limitations.

• Send suggestions.

Registered users can also subscribe to our Technical Support

e-Bulletins. These e-Bulletins proactively alert you to important technical support information such as:

• Technical advisories.

• Product updates.

• Service Pack announcements.

• Product release announcements.



2 1 Technical Support

Phone and E-mail Customer support is also available by phone, fax, and e-mail for customers who have a current support contract for their product(s). Toll-free charges are

listed where available; otherwise local and international rates apply.

For the most up-to-date phone listings, please see the Online Technical

Support Center at:

http://support.aspentech.com

Support Centers Operating Hours

North America 8:00 – 20:00 Eastern time

South America 9:00 – 17:00 Local time

Europe 8:30 – 18:00 Central European time

Asia and Pacific Region 9:00 – 17:30 Local time



2 Getting Started 3

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.

Recalling a Case from Memory

Included with Aspen Energy Analyzer are several pre-built synthesis cases. These cases are located in the Samples subdirectory.

1 There are three ways you can load a case:

o On the toolbar, click on the Open Case icon.

o From the File menu, select Open.

o Press ctrl o.

2 In the Look in drop-down list, find and open the Samples folder.

3 Double-click the program folder from which you want to select a case.

You can also open an old case by clicking on the Files of type drop-down list, and selecting the program file type you want.

4 Select a case, and click the Open button. The pre-built case appears on your desktop.



4 2 Getting Started

Saving the Sample Case Under a New Name

Before working with the case, you should save it using a new name to ensure

that the original file remains intact.

1 There are three ways you can save the sample case:

o On the toolbar, click on the Save Case icon.

o From the File menu, select Save As.

o Press ctrl shift s.

2 In the Save in drop-down list, find the location where you want to save the case.

3 Type a new name, for example MYCASE, in the File name field.

4 Click the Save button, and Aspen Energy Analyzer will save your case with the new name.

Converting a HI Case to a HI Project

A Heat Integration (HI) Project can be used to design multiple heat exchanger networks. With the HI Project, you can specify various process and utility

stream operating parameters and observe the changes on plots.

In this Getting Started example, you will convert a Heat Integration (HI) Case

into a HI Project.

Note: The command to convert HI Case into HI Project is irreversible. A HI Case can be converted to a HI Project, but a HI Project cannot be converted

back into a HI Case.

Start Aspen Energy Analyzer, open an old Aspen Energy Analyzer case:

case9s.hch, and save the case under a different name. For more information, see Recalling a Case from Memory and Saving the Sample

Case Under a New Name.

1 If the Heat Integration Manager is not open when you open the case,

there are two ways you can access the Heat Integration Manager view:

o From the Managers menu, select Heat Integration Manager.

OR

o On the toolbar, click on the Heat Integration Manager icon.

The Heat Integration Manager view appears.

2 From the Heat Integration Manager view, select Case1 from the list on the right.

3 Click the View button to open the HI Case view.

4 Click on the Converts Case To Project icon at the bottom left corner of the

HI Case view.



2 Getting Started 5

5 The Convert Case To Project view appears with a message asking if you

want to convert the case to project. Click the OK button.

6 Select Case 1 from the Viewer pane in the HI Project view.

The Data tab displays all process streams information on the Process Streams page, and all utility streams information on the Utility Streams page.

You can also observe the Composite Curves, Grand Composite Curve, Alpha Plot, or General Plot in the Main pane.



6 2 Getting Started

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. The inlet temperature of the stream hot1 is currently specified as 327°C.

1 On the Process Streams page, select the Inlet T cell for the hot1 stream.

2 Type 400, and press enter.

Upon modifying the inlet temperature of hot1, the hot composite curve

changes. Consequently, Aspen Energy Analyzer recalculates all target values and the new results are automatically updated. A new set of pinch

temperatures are displayed as well. Click on the Targets tab to view these changes.

3 Click in the DTmin field at the bottom left corner of the view. Change the

DTmin from 10oC to 15oC.

4 Click on the Options tab. In the Utility Load Allocation Method group,

select the Cheapest Utility Principle method.

5 Click the Data tab, and then click the Utility Streams page.

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.

6 Select the Name cell of the cw stream. Press delete.



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