EDR plate

download EDR plate

of 8

  • date post

    24-Nov-2015
  • Category

    Documents

  • view

    98
  • download

    9

Embed Size (px)

Transcript of EDR plate

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    A Brief Tutorial (and sample case for interactive sizing in Aspen Plus V8.0)

    Lauren Sittler, Product Management, Aspen Technology, Inc.Tom Ralston, Director of Equipment Design and Rating, Aspen Technology, Inc.

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    Table of ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    Tutorial Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    Overview of the Example Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    Interactive Sizing in Aspen Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    Using the EDR Sizing Console. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    1

    IntroductionAspen Plus V8 features a unique integrated workflow for transforming Shell and Tube Exchangers and Air Cooled

    Exchangers from simple models to rigorous models in the simulation environment. This new functionality utilizes the same

    rigorous Aspen Exchanger Design & Rating (EDR) methods as the stand-alone product. This integration enables process

    engineers to create designs that are more energy efficient prior to consulting Energy Optimization Experts and Costing

    departments and also serve as an excellent basis for subsequent detailed thermal and mechanical designs. Process

    designs created using rigorous heat exchanger designs are more precise and automatically adapt to changes in process

    design or process operation changes.

    This is not meant to be used as a stand-alone reference document. We recommend that a range of other resources be

    called upon to give the new user a comprehensive view of how to complete rigorous exchanger sizing in Aspen Plus.

    These may include:

    AspenTech support website (support.aspentech.com)

    AspenTech courseware available in on-line and in-person versions

    AspenTech business consultants

    Additional Jump Start Guides

    This Jump Start Guide is mainly focused on the preliminary design of heat exchangers where the objective is to rapidly

    assess the size and cost of exchangers required for a given process duty, including requirements for multiple shells in

    series and in parallel. It assumes that the user has Aspen Plus V8.0 or higher installed on her or his computer and has a

    basic understanding of modeling in Aspen Plus.

    Tutorial OverviewThis Jump Start guide will provide step-by-step instructions for completing interactive sizing in Aspen Plus using an

    example Aspen Plus case file to demonstrate the integrated workflow. The EDR Solution Case for the final EDR design has

    also been included. The files associated with Aspen Shell & Tube Knowledge Base are available for download on the

    Customer Support & Training website.

    Overview of the Example CaseOpen the case Shell&TubeforInteractiveSizing.bkp and Click on the Main Flowsheet tab. This case models a petroleum

    separation process in which the feed is flashed, heated in the tube side of a shell and tube exchanger, and sent to a

    distillation column. The lighter components are distilled off as gas and the heavier components enter the shell side of the

    exchanger, providing the heat source for the cold oil. The warm Natural Gas Liquid (NGL) is then cooled in a cooler and

    pumped as Liquid Natural Gas (NLG). This tutorial will focus on sizing the SHELLTUB exchanger. Currently, this shell and

    tube exchanger is specified using the shortcut method. The tutorial guides you through opening the EDR interactive sizing

    console, using default parameters to generate a preliminary design, and then makes adjustments to the design to make it

    better suited for the process application.

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    2

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    Figure 1. Petroleum Separation Flowsheet

    Interactive Sizing in Aspen PlusGetting Started

    1. Open the file Shell&TubeforInteractiveSizing.bkp. Run Aspen Plus from the Home Ribbon > Run group or by pressing F5.

    2. Run the simulation and ensure there arent errors by looking at the Control Panel. If a simulation does contain any errors

    these must be fixed before EDR rigorous sizing can be used.

    3. Locate the SHELLTUB exchanger, immediately downstream of the first separator. Double-click on the exchanger icon on

    the flowsheet to open the setup form. On the Specifications tab of the set up form, youll see the Calculation box. Notice

    that the calculation mode is currently set to Shortcut.

    Figure 2. Size Shell&Tube in Aspen Plus

    4.Click on the Size Shell&Tube button to begin interactive sizing. The EDR Sizing Console will open inside of Aspen Plus.

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    3

    Using the EDR Sizing Console

    5. On the EDR Sizing Console, you will see that the default parameters (which appear in red) have already been set for the

    geometry. Click the Size Exchanger button to run the optimization and find the first preliminary design. The run status

    tab will become active while calculations are running.

    Figure 3. Size the Exchanger with Default Parameters

    6.When the calculation is complete, the results will be displayed on the Geometry Tab shown in Figure 3. Here, you will

    see the setting plan and stream temperature profiles, as well as the exchanger dimensions and cost information. The

    first design is the default BEM TEMA type with 1 shell, 110 tubes, 1 tube pass, and a 30-Triangular tube pitch. It has a

    total cost of $19,397.

    7. Next, changes will be made to the exchanger to make it better suited for our process. Since we have petroleum oil

    entering the tube side, it is recommended that a removable cover with a floating head and a 90 degree tube pattern be

    used to make defouling the exchanger easy. For greater accuracy, a realistic fouling factor will be specified. Set the

    specifications as shown in Figure 4.

    Figure 4. Geometry Tab Results

    Geometry Tab

    TEMA Type AES

    Tube Pattern 90-Square

    Process Tab

    Fouling Resistance (Hotside and Coldside) 0.001 hF/BTU

  • 2013 Aspen Technology, Inc. AspenTech, aspenONE, the Aspen leaf logo, the aspenONE logo, and OPTIMIZE are trademarks of Aspen Technology, Inc. All rights reserved. 11-3814-0713

    4

    Jump Start: Rigorous Shell & Tube Exchanger Sizing in Aspen Plus V8

    Figure 5. EDR Sizing Console Results

    9. Click the Size Exchanger button again to run the second design.

    10. After the optimization is complete, we can compare the new design with our preliminary sizing. In the middle columns

    as shown in Figure 5, you can see the new design side-by-side with the previous run. In this case, adding a removable

    cover and a floating head has made our design more expensive. Our shell diameter has increased, as well as the

    number of tubes and tube passes. Compare your design with the EDR solution file provided, SHELLTUB Solution.edr.

    11. At this stage, you could continue redesigning the exchanger until it satisfies the desired cost and performance, but for

    now we will keep this as the final design, save it, and update the model in our simulation.

    12. To save this rigorous exchanger design in the Aspen Plus flowsheet, click Accept Design from the EDR Console, as

    shown in Figure 6. The other options available on the console are to cancel the design, open another EDR file or

    template (to start a new design), or save the current results as an EDR standalone file without exiting t