AspenEDRV7 3 2-Rel

Release Notes

Aspen Exchanger Design and RatingV7.3.2

Version Number: V7.3.2November 2011

Copyright (c) 2011 by Aspen Technology, Inc. All rights reserved.

Aspen Exchanger Design and Rating, and the aspen leaf logo are trademarks or registered trademarks of AspenTechnology, Inc., Burlington, MA.

All other brand and product names are trademarks or registered trademarks of their respective companies.

This document is a guide for using AspenTech's software. This documentation contains AspenTech proprietary andconfidential information and may not be disclosed, used, or copied without the prior consent of AspenTech or as setforth in the applicable license agreement. Users are solely responsible for the proper use of the software and theapplication of the results obtained.

Although AspenTech has tested the software and reviewed the documentation, the sole warranty for the softwaremay be found in the applicable license agreement between AspenTech and the user. ASPENTECH MAKES NOWARRANTY OR REPRESENTATION, EITHER EXPRESSED OR IMPLIED, WITH RESPECT TO THISDOCUMENTATION, ITS QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULARPURPOSE.

Aspen Technology, Inc.200 Wheeler RoadBurlington, MA 01803-5501USAPhone: (1) (781) 221-6400Toll Free: (888) 996-7100URL: http://www.aspentech.com

Aspen Exchanger Design and Rating V7.3.2 Release Notes iii

Contents

1 Introduction.........................................................................................................5

Related Documentation.....................................................................................5Technical Support ............................................................................................5

2 What’s New..........................................................................................................7

Aspen Exchanger Design and Rating ...................................................................7Aspen Air Cooled Exchanger ..............................................................................8Aspen Fired Heater......................................................................................... 10Aspen Plate Exchanger.................................................................................... 13Aspen Plate Fin Exchanger............................................................................... 14Aspen Shell & Tube Exchanger......................................................................... 15Aspen Shell & Tube Mechanical ........................................................................ 20

3 Software Fixes ...................................................................................................31

Aspen Exchanger Design and Rating ................................................................. 31Aspen Air Cooled Exchanger ............................................................................ 31Aspen Fired Heater......................................................................................... 32Aspen Plate Exchanger.................................................................................... 32Aspen Plate Fin Exchanger............................................................................... 33Aspen Shell & Tube Exchanger......................................................................... 33Aspen Shell & Tube Mechanical ........................................................................ 34

4 Known Issues.....................................................................................................39

Aspen Exchanger Design and Rating ................................................................. 39Aspen Fired Heater......................................................................................... 40Aspen Shell and Tube Exchanger...................................................................... 40Aspen Plate Fin Exchanger............................................................................... 41

iv Aspen Exchanger Design and Rating V7.3.2 Release Notes

Introduction 5

1 Introduction

This document describes the New Features and Known Issues for the AspenExchanger Design and Rating applications, which include the following:

Aspen Air Cooled Exchanger (AirCooled)

Aspen Shell & Tube Exchanger (Shell&Tube)

Aspen Shell & Tube Mechanical (Shell&TubeMech)

Aspen Fired Heater (FiredHeater)

Aspen Plate Exchanger (Plate)

Aspen Plate Fin Exchanger (PlateFin)

Related DocumentationIn addition to this guide, the following additional documentation is available.

Aspen Exchanger Design and Rating Help

Aspen Exchanger Design and Rating Installation Guide

Technical SupportAspenTech customers with a valid license and software maintenanceagreement can register to access the online AspenTech Support Center at:

http://support.aspentech.com

This Web support site allows you to:

Access current product documentation

Search for tech 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

Send suggestions

Report product defects

Review lists of known deficiencies and defects

6 Introduction

Registered users can also subscribe to our Technical Supporte-Bulletins. These e-Bulletins are used to alert users to important technicalsupport information such as:

Technical advisories

Product updates and releases

Customer support is also available by phone, fax, and email. The most up-to-date contact information is available at the AspenTech Support Center athttp://support.aspentech.com.

Software Fixes 7

2 What’s New

This chapter lists all of the new features included with V7.3.2.

Aspen Exchanger Design andRating

New Features and EnhancementsThe following new features and enhancements were added in release V7.3.2:

Product Training

Product Training

A new page has been added to the Online Training Center to act as a focalpoint for EDR product information and training materials. It is accessed byselecting from the toolbar drop-down box Help | Product Training.

8 Software Fixes

Under Featured Training Materials you will find direct links to Online TrainingMaterials organized under the headings:

Best Practices

Getting Started

Multi-Product Integration

What’s New

Within the EDR Online Training Center the following actions are available:

Search for on-line training materials

Access the AspenTech Customer Support Center

Access the Submit an Incident section on the AspenTech CustomerSupport Center

Access the Live Chat section on the AspenTech Customer Support Center

Access the Training Class catalog

Access the Training Class schedules

Access the EDR LinkedIn page

This online content will help you become more familiar with the EDR productsand their capabilities through direct access to the latest tutorials, bestpractice articles, and other self-help tools.

Aspen Air Cooled Exchanger

Product DescriptionAspen Air Cooled Exchanger (AirCooled) is a program for the Design,Rating/Checking, and Simulation of air coolers and other tubular crossflowheat exchangers. The program can be used standalone by the thermalspecialist for exchanger design or as an integrated product with AspenTech'ssteady-state process simulation programs Aspen Plus and Aspen HYSYS.

When used as a stand-alone program in design mode, AirCooled candetermine the optimum heat exchanger configuration that satisfies thespecified heat duty, allowable pressure drop, and/or maximum velocity. Theprogram can also be used to check and rate heat exchangers for requiredprocess duties.

When integrated with Aspen Plus or Aspen HYSYS, AirCooled providesengineers with the ability to rigorously model heat exchanger operation andidentify capital saving opportunities in the overall process configuration.Bottlenecks can be identified, process improvements can be modeled forvarious process operating scenarios, and costly maintenance schedules can beoptimized.

Software Fixes 9


Improved method for handling the viscosity of two liquid phases

Specification of a scaling factor for heat transfer coefficients is nowavailable as an option for outside enhancement

Improved reporting of humidity ratio when wet air is cooled below its dewpoint

Corrected output for nozzle velocities with multiple bundles per unit

Improved calculation method for single phase heat transfer in horizontaltubes

Improved method for handling the viscosity oftwo liquid phasesAn improved method has been incorporated for calculating the effectiveviscosity of two immiscible liquid phases, usually oil and water. There is a newprediction of the inversion point at which the continuous phase changes fromwater to oil, with the result that the oil dominant region will extend to loweroil volume fractions. This means that the effective viscosity will tend to behigher than predicted by the previous method when the oil volume fraction isbetween the old and new inversion point. The new HTFS method gives slightlylower effective viscosities than the old method in the water dominant regionand somewhat larger reductions in the oil dominant region. Thus the neweffective viscosity can be greater or smaller than from the previous methoddepending on the oil volume fraction.

In addition, the HYSYS method for oil-water viscosities is now available as anoption. The major difference in the HYSYS method is that the oil is assumedto be dominant for oil volume fractions above 0.5, and the water is dominantbelow 0.33. A weighted mean is used in the transition region.

Differences between the predictions of the three methods will generally belarger for heavy oils than for light oils.

It is also now possible to specify that the program uses the higher of the oiland water viscosities, and this is the default for condensation and falling filmevaporation.

A final option is that it is possible to apply the former HTFS method (the onlyoption in V7.3.1 and earlier).

Improved calculation method for single phaseheat transfer in horizontal tubes

The calculation method for single phase heat transfer in horizontal tubes hasbeen improved so enhancements to laminar heat transfer from naturalconvection have an upper limit. This could result in lower coefficients towardsthe high Reynolds number end of the laminar range.

10 Software Fixes

Compatibility NotesAspen Air Cooled Exchanger V7.3.2 can be installed and used at the sametime as V7.3.1 and other previous versions of Aspen Air Cooled Exchanger.

Aspen Fired Heater

Product DescriptionAspen Fired Heater (FiredHeater) is a program for the simulation and rating offurnaces and fired heaters. The program calculates heat transfer and otherkey parameters in a variety of tube configurations in both box and cylindricalfireboxes using the well stirred, imperfectly stirred, or long-furnace models.In addition, the heat transfer in up to nine convection banks can be handled.


Calculation and reporting of flue gas properties using Aspen Properties

Detailed reporting the draft calculation and flue gas properties

Improved treatment of the air pre-heater

Detailed reporting of peak tube calculation parameters

Improvements to the Firebox diagrams (inclusion of roof tubes)

Increased allowance for pressure losses in U-bends and fittings

Calculation of flue gas properties using AspenProperties

All flue gas property calculations in FiredHeater are now performed usingAspen Properties (except when specified by the user). All the flue gasproperty calculations are performed “under-the-hood” and require no actionsby the user and there is no discernible impact on speed of calculation. UsingAspen Properties gives the benefits of improved accuracy in propertycalculations and resultant energy balances. Flue gas properties are reportedin Results | Calculation Details | Flue Gas Properties.

Software Fixes 11

Detailed reporting of draught calculation

A new form detailing draught (pressure) losses on the flue gas side for majoritems has been added to the output forms (see Results | CalculationDetails | Draught Details). This reports the total and individual components(friction, buoyancy, acceleration) of draught loss for major items on the fluegas side. The draught calculation is based on the methods described in HTFSResearch Network report RM20.

Improvements to Air Preheater

By default, FiredHeater now performs an energy balance on the air preheater(if specified) so that the heat load on the combustion air side balance the heatload on the flue gas side. The air preheater is specified on the ProgramOptions | Thermal Analysis | Preheater form (see below). If thepreheater is designated as an included flue component, then the user has theoption to either calculate or specifiy the flue gas temperature drop. IfCalculate gas DT is selected then an energy balance is used to calculate thetemperature drop of the flue gas based on the required combustion oxidant(air) temperature at the burner, and the preheater draw-off fraction. Theresults for the preheater, including a calculated UA value are reported onResults | Thermal Hydraulic Summary | Flue Gas | Air Preheater.

12 Software Fixes

Detailed Reporting of Peak Tube TemperatureParameters

Parameters in the API 530 peak tube calculation are now reported on Results| Thermal Hydraulic Summary | Firebox | Peak Temperatures andFluxes.

Firebox diagram: Inclusion of Roof Tubes

Roof tubes are now included in the firebox diagram.

Software Fixes 13

Increased pressure drop in U-Bends and Fittings

The default allowance for pressure drop in process-side U-Bends has beenincreased from 0.5 to 1.0 velocity heads (approximately equivalent to 50 tubediameters). This is believed to be more in line with experience. This defaultvalue can be overridden on Program Options | Pressure drop.

Compatibility NotesAspen Fired Heater V7.3.2 can be installed and used at the same time asV7.3.1 and other previous versions of Aspen Fired Heater.

FiredHeater is compatible with all versions of Aspen Properties. No furtheraction is required if Aspen Properties V7.3 (installed automatically with V7.3.2of EDR), V7.2, or V7.1 is registered. If another version of Aspen Properties isregistered, compatible versions of FlueGasxx.x.aprpdf andSteamxx.x.aprpdf should be placed in the <EDR>/Dat/Props folder. Theseare generated by opening FlueGas.aprbkp and Steam.aprbkp andexporting the above aprpdf files with the version number included in thename (i.e., xx.x = ‘25.0’, ’26.0’ …).

Aspen Plate Exchanger

Product DescriptionAspen Plate Exchanger enables the optimum design, rating, and simulation ofplate and frame heat exchangers.


Fully Implemented Active Input Checking

Fully Implemented Active Input Checking

Aspen Plate Exchanger V7.3.2 now has the same input functionality as Shelland Tube and other heat exchanger programs. With each new input, alldefaults are recalculated, and all inputs are rechecked. Mandatory inputsdisplay with a blue-green background until a value is supplied. If any inputvalue would generate a fatal error, then the background to the input showsred. Any inputs which are not used for a particular calculation type are grayedout, making the input process much simpler for new users.

Some of this functionality was available previously, but the graying out, theblue-green background, and the red background have been extended andimproved by the fully implemented input checking.

The input checking process has in places been made more rigorous,preventing inconsistencies not checked for in previous versions. Some cases

14 Software Fixes

which previously ran, may thus now fail, but it should be clear which missingor incorrect inputs are causing the problem.

Compatibility NotesAspen Plate Exchanger V7.3.2 can be installed and used at the same time asV7.3.1 and other previous versions of Aspen Plate Exchanger.

Aspen Plate Fin Exchanger

Product DescriptionAspen Plate Fin Exchanger (PlateFin) enables you to simulate the performanceof plate-fin heat exchangers, either the large brazed aluminum cores used forcryogenic duties, with up to 20 process streams, or units in other metals usedfor duties at ambient temperatures and above. It also provides facilities fordoing a “first shot” design of this type of exchanger and for modelingthermosiphon reboilers.


Option to specify flow maldistribution on a layer by layer basis for eachstream.

More robust iteration for recirculating flows in thermosiphons and kettles;heat balance is preserved when the flow changes.

Mass flux output for X-flow streams.

Use correct mass flux in calculations for multi-pass layer elements in X-flow exchangers (single passes in X-flow, and multi-pass elements in axialflow are unaffected).

Improved exchanger weight calculation in Design

Properties recalculation at the beginning of a run is now an option, ratherthan automatic.

Application Control options, mainly for future use when matching facilitiesare put in Simulators, to speed up solution times.

Specification of heat load as a fraction of stream maximum load.

Exchanger effectiveness (fraction of maximum possible heat load) as aninput and output.

Option to specify minimum pressure in calculations. The default for this isno longer tied to maximum pressure drop, so messages that pressurechanges have been scaled (based on maximum pressure change/minimum pressure) will now be much less likely to occur.

Multiple repeated near-identical messages are now suppressed, unless anew option to show all messages is invoked.

Streams with only hardway fin are now permitted.

Software Fixes 15

The layer schematic on the Layer types input is now generated even if noexchanger length is input.

Compatibility NotesAspen Plate Fin Exchanger V7.3.2 can be installed and used at the same timeas V7.3.1 and other previous versions of Aspen Plate Fin Exchanger.

Aspen Shell & Tube Exchanger

Product DescriptionAspen Shell & Tube Exchanger (Shell&Tube) is a program for the Design,Rating/Checking, and Simulation of shell and tube, double pipe, and multitubehairpin heat exchangers. The program can be used standalone by the thermalspecialist for exchanger design or as an integrated product with AspenTech'ssteady-state process simulation programs Aspen Plus and HYSYS.

When used as a stand-alone program in design mode, Shell&Tube candetermine the optimum heat exchanger configuration that satisfies thespecified heat duty, allowable pressure drop, and/or maximum velocity. Theprogram can also be used to check and rate heat exchangers for requiredprocess duties.

When integrated with Aspen Plus or HYSYS, Shell&Tube provides engineerswith the ability to rigorously model heat exchanger operation and identifycapital saving opportunities in the overall process configuration. Bottleneckscan be identified, process improvements modeled for various processoperating scenarios, and costly maintenance schedules optimized.


A more comprehensive set of tubes is selected for vibration checks.

User can specify additional tubes on the input tube layout for vibrationchecks.

Vibration-check tubes can be highlighted on the tube layout output –including an indication of any vibration risks, from fluid elastic instabilitiesor resonances.

Improved handling of U-bends and local shellside velocities in vibrationchecks.

Improved tabular output from vibration and resonance checks.

Plugged tubes can be individually identified in the tube layout input andwill appear in the tube layout output.

Properties recalculation at the beginning of a run is now an option, ratherthan automatic.

Application Control options, mainly for future use when matching facilitiesare put in Simulators, to speed up solution times.

16 Software Fixes

Exchanger effectiveness (fraction of maximum possible heat load) as aninput and output.

Option to specify minimum pressure in calculations. The default for this isno longer tied to maximum pressure drop, so messages that pressurechanges have been scaled (based on maximum pressure change/minimum pressure) will now be much less likely to occur.

Multiple repeated near-identical messages are now suppressed, unless anew option to show all messages is invoked.

Improved default nozzle locations for vertical E-shells.

No-U-bend-heat-transfer option now available in unbaffled exchangers.

Improved bundle entrance calculations with use-existing-layout and withno-tubes-in-window.

Improved calculation of kettle large shell diameters.

Sealing strip orientation under user control, and always defaulting totransverse.

Additional information in Recap of Designs table.

The calculation method for single phase heat transfer in horizontal tubeshas been improved so enhancements to laminar heat transfer from naturalconvection have an upper limit. This could result in lower coefficientstowards the high Reynolds number end of the laminar range.

Details of Vibration Analysis Improvements

New Methods for Selection of Representative Tubes

In previous versions of Aspen Shell & Tube Exchanger, the program selected5 representative tubes on which to perform vibration analysis. For manyarrangements of E-type shell exchangers, this was adequate to establishwhere vibration problems would occur within a tube bundle. However as thevibration methods and the shellside modeling were improved and bettermodeling of divided flow shells, U-bend bundles, and impingement deviceswas available, it was clear that the analysis required extension.

In Aspen Shell & Tube Exchanger V7.3.2, the program will select up to 9tubes for vibration analysis depending on:

shell type

baffle type & baffle cut

rear head type (rear tubesheet or U-bends)

presence of impingement devices

nozzle orientation

Vibration Result Reporting

The vibration reports have been modified and improved to enable viewing ofresults for a larger number of tubes. Design of these reports has beenreviewed by the Tubular Exchangers Review Panel. The new reports havebeen configured to list the tubes analyzed in columns and the key vibrationparameters in rows.

Software Fixes 17

This arrangement allows more tubes to be shown. If required, scroll barsappear.

Tube Layout Vibration Results Display

Go to Results | Mechanical Summary | Setting Plan & Tube Layout andthe Tube Layout tab. This can now show the tubes selected for vibrationanalysis.

Click the Vibration tubes button.

18 Software Fixes

Tubes included in the vibration analysis have a red v superimposed over thetube circle.

The table below the tube layout shows data on both program-selected anduser-selected tubes and indicates which tubes might be at risk fromresonance or fluid elastic instability.

User-specified Tubes for Vibration Checks

Shell&Tube selects representative tubes for analysis which it deems shouldcover the worst cases for all TEMA geometries.

Now, in addition to the program-selected tubes, the user can nominateaddition tubes that are deemed important to analyze.

To allow you to interactively edit any aspect of the tube layout, first navigateto Input | Exchanger Geometry | Geometry Summary. Make sure thatyou have selected Use existing layout.

Now navigate to the next tab on Input | Exchanger Geometry | GeometrySummary | Tube Layout. Right-click the tube you want to nominate andfrom the drop down list which appears, select Vibration Tube and Mark.

The vibration characteristics of this tube will now be amongst those analyzed,appearing in the short summary table beneath the Tube Layout withinResults. These user-specified tubes also appear in the full vibration reports.

Interactive Specification of Plugged Tubes

If tubes in an operating exchanger are found to be leaking, this is oftenrepaired by inserting plugs in both ends of the tube at the tubesheets. Inprevious releases, the user could designate the total number of tubes

Software Fixes 19

plugged, and there was also an option in the Pass Details to designate thenumber of tubes plugged in each pass. In Aspen Shell & Tube ExchangerV7.3.2, the user may interactively specify tubes in any pass which areplugged.

To mark a tube in any pass as plugged, navigate to Input | ExchangerGeometry | Geometry Summary | Tube Layout. Right-click the tube youwant to nominate and from the drop down list which appears, select PluggedTube and Mark.

As illustrated, for user-specified vibration tubes, you need to be able tointeractively edit the tube layout to designate specific tubes that are plugged.Make sure you have selected Use Existing Layout in the GeometrySummary tab.

The program will take account of these plugged tubes assuming they are nolonger being available for heat transfer and modeling the effect on the tubeside pressure drop and tube side heat transfer coefficient.

Compatibility NotesAspen Shell & Tube Exchanger V7.3.2 can be installed and used at the sametime as V7.3.1 and other previous versions of Aspen Shell & Tube Exchanger.

20 Software Fixes

Aspen Shell & Tube Mechanical

Product DescriptionAspen Shell & Tube Mechanical (Shell&TubeMech) is a comprehensive set oftools for the complete mechanical design or rating of shell & tube heatexchangers and basic pressure vessels.

When used with Shell&Tube, Shell&TubeMech provides bi-directional datatransfer, eliminating the need for data re-entry and ensuring consistencybetween thermal and mechanical designs. This enables engineers to bothoptimize and efficiently validate the thermal and mechanical designs of shelland tube heat exchangers.

When used as a stand-alone program in design mode, Shell&TubeMech canoptimize the design of most components including flanges, tubesheets,expansion joints, supports, shell, and nozzle reinforcement. They conform toTEMA standards and several international codes including, ASME Section VIIIDiv.1, AD Merkblätter, CODAP, and EN13445.


The 2011a addenda of the ASME 2010 Code and material propertiesupdate. Among the highlights in the 2011a addenda of the ASME 2010code are:

o Revised shell longitudinal stress calculation for distributor belts

o Revised tubesheet effective bolt loads

o Revised appendix 26, expansion joints

o Updated acceptable editions of referenced standards, e.g. B16.5

Updated wind and seismic load calculations per ASCE/SEI 7-10

Finned tubes calculations per ASME VIII-1-UG-8(4)

Maximum nozzle external loads per TEMA RGP-RGB-10.7

Nozzle external loads per WRC-537

Metric bolt dimensions per PD 5500 and EN 13445

Added bolt tensioner clearances in flange design/rating

Improved the application of UCS-68(c) PWHT for the reduction in impacttesting exemption temperature

Hydrostatic pressure based on MAWP (new and cold) or MAWP (hot andcorroded)

Improved processing of combined loadings

New input for desired MDMT

Software Fixes 21

The 2011a addenda of the ASME 2010 Code andmaterial properties update

Aspen Shell and Tube Mechanical has been updated with the 2011a addendaof the 2010 ASME code. New materials were added and obsolete materialswere deleted. The Code and material standard year is shown below.

Among the highlights in the 2011a addenda of the ASME 2010 code are:

Revised shell longitudinal stress calculation for distributor belts

Revised tubesheet effective bolt loads

Revised appendix 26, expansion joints

Updated acceptable editions of referenced standards, e.g. B16.5

Revised shell longitudinal stress calculation for distributorbelts

22 Software Fixes

When a distributor belt is present, the shell stress calculations will nowinclude the net shell cross sectional area after deducting the shell cut-outarea. The User can control the total percentage of the shell cut-out(s) via thisinput under Nozzles-General | Domes/Distributor Belts.

The program defaults to 33% total cut-out.

Revised tubesheet effective bolt loads

Table UHX-8.1 has been introduced in UHX that determines which bolt loadshould be used in the design of tubesheets. This table dictates that the flangeoperating bolt load should be used instead of the maximum of the operatingor gasket seating condition for the pressure-only load cases (1 to 3). If suchcases control the design, the tubesheet may benefit if the flange design isgoverned by the gasket seating condition (e.g. a hard gasket). This effect isonly applicable to flanged tubesheets.

Revised appendix 26, expansion joints

Several corrections were made affecting nomenclature, sketches, and axialdisplacement calculations.

Updated acceptable editions of referenced standards, e.g.B16.5

Software Fixes 23

Updated wind and seismic load calculations perASCE/SEI 7-10

The program now calculates the wind and seismic load calculations perASCE/SEI 7-10. This procedure substituted the previously used method,ASCE/SEI 7-05.

Finned tubes calculations per ASME VIII-1-UG-8(4)

The program now calculates the maximum allowable working pressure(MAWP) using the root diameter and the minimum wall thickness of thefinned section and also using the plain diameter and thickness. The programthen selects the case that results in the lower MAWP. Prior program versionscalculated the MAWP using the plain tube geometry under the assumptionthat the fins added strength.

The program can use a low-fin tubes databank from the thermal program(Shell & Tube Exchanger) or one built into Shell & Tube Mechanical. Theprogram will also use the low-fin tube geometry from Shell & Tube Exchangerwhen data is transferred to Shell & Tube Mechanical. The User can alsooverride the finned tube geometry, as shown here:

Maximum nozzle external loads per TEMA RGP-RGB-10.7

The program now calculates the maximum nozzle external loads per TEMARGP-RGB-10.7. The User can also select nozzle external load calculations perTEMA or in combination with HEI and WRC:

24 Software Fixes

If the User does not enter nozzle external loads, the program will calculatethe maximum co-current external nozzle loads (radial forces with moments).

If the geometry parameters exceed the limits on design, the program willprovide the option of using extrapolated results in conjunction with U-2(g).

Nozzle external loads per WRC-537

The program can now calculate the nozzle external loads per bulletin WRC-537. If the WRC chart parameters are exceeded, the program extrapolates tofinish the calculation. When the chart parameters are exceeded, U-2(g) isused and a note is provided. If the User selects the older WRC-107 designprocedure, the program will also extrapolate if necessary using the new WRC-537 design procedure to finish the calculations.

Typical warning message if User selects nozzle external load calculations perWRC-107 and the geometric parameters are exceeded:

A warning message is also provided in the WRC detail calculations report.

Metric bolt dimensions per PD 5500 and EN 13445

Added processing of metric bolt dimensions per PD 5500 and EN 13445 allowsthe designer to use the British code bolt specifications per PD 5500, table 3.8-2 or the European code bolt specifications per EN 13445 Table GA.8-1 in thedesign of body flanges. Dimensions not shown on applicable standards weretaken from TEMA metric bolt tolerances or otherwise interpolated from metricminimum flange geometry.

Software Fixes 25

Added bolt tensioner clearances in flangedesign/rating

Added processing of bolt tensioner clearances in flange design or ratingsallows the User to design body flanges taking into consideration the variousclearances necessary to use hydraulic bolt tensioners. If the body flangegeometry is specified, the program will issue a warning if not enoughclearance is available to use hydraulic bolt tensioners.

26 Software Fixes

Improved the application of UCS-68(c) PWHT forthe reduction in impact testing exemptiontemperature

An additional input item has been added to better process the governingtesting exemption temperature by the use of Post Weld Heat Treating when itis not otherwise a requirement of ASME VIII Div 1.

Hydrostatic pressure based on MAWP (new andcold) or MAWP (hot and corroded)

An input option has been added that will allow the User to select the basis forthe calculation of the hydrostatic test pressure. The default will continue tobe the design pressure.

Software Fixes 27

The option is also in the Costing Database:

Improved processing of combined loadings

Processing of combined loadings per ASME VIII-2 section 4.3.10 has beenenhanced. Now the User will have access to an input screen to overrideprogram-calculated values. The results have been enhanced with additionalintermediate values using the governing case per table 4.1.2., design loadcombinations. Typical input screen if User desires to override program defaultresults:

28 Software Fixes

Example of output:

Design Load Combination

- 1 - P + Ps + D- 2 - P + Ps + D + L- 3 - P + Ps + D + S- 4 - 0.9P + Ps + D + 0.75L +0.75S- 5 - 0.9P + Ps + D + (W or 7E)- 6 - 0.9P + Ps + D + 0.75(W or 7E) + 0.75L + 0.75S- 7 - 0.6D + (W or 0.7E)- 8 - Ps + D + F

load **Effective** Bending Torsional AllowableCase Pressure Force Moment Moment vs (4.3.44)

psi lbf*in lbf*in lbf*in psi

- 1 - 356 66152 0 0 20000- 2 - 356 66152 0 0 20000- 3 - 356 66152 0 0 20000- 4 - 320.4 66152 0 0 20000- 5 - 320.4 66152 3048000 0 20000- 6 - 320.4 66152 2286000 0 20000- 7 - 0 0 3048000 0 20000- 8 - 0 66152 0 0 20000

load ********************* stresses ***************************Case sigmatm sigmasm Tau sigma1 sigma2 sigma3 Limitpsi (4.3.32) (4.3.33) (4.3.34) (4.3.41) (4.3.42) (4.3.43) (4.3.44)

- 1 - 16242 7713 0 16242 7713 -178 14224- 2 - 16242 7713 0 16242 7713 -178 14224- 3 - 16242 7713 0 16242 7713 -178 14224- 4 - 14618 6919 0 14618 6919 -160 12802- 5 - 14618 7390 0 14618 7390 -160 12799- 6 - 14618 7272 0 14618 7272 -160 12798- 7 - 0 471 0 471 0 0 471- 8 - 0 -231 0 0 -231 0 231

New input for desired MDMT

The User can now enter the desired MDMT:

Software Fixes 29

The summary Design Specifications will report the calculated MDMT:

If the calculated MDMT is higher than the desired MDMT, is warning is issued.

Compatibility NotesAspen Shell & Tube Mechanical V7.3.2 can be installed and used at the sametime as V7.3.1 and other previous versions of Aspen Shell & Tube Mechanical.

30 Software Fixes

Software Fixes 31

3 Software Fixes

Aspen Exchanger Design and Rating includes a number of software fixes thatfurther improve the product.

Aspen Exchanger Design andRatingThis section describes the software fixes to the overall Aspen ExchangerDesign and Rating program.

CQ Number Description

CQ00431362 Fixed incomplete hyperlinks in import from Aspen Plus (HYSYS)

CQ00450331 Fixed EDR import from Aspen Plus failure due to "ActiveX

component can't create object"

CQ00405390 Fixed a significant memory leak in bjacwin.exe

Aspen Air Cooled ExchangerThis section describes the software fixes to Aspen Air Cooled Exchanger.


CQ00448487 Corrected blank or zero x-side pressure drops when no fans

selected

CQ00447651 Corrected tube length calculation error in Air Cooled Condenser

design mode

CQ00446357 Corrected bubble point calculation for a vapor only stream

CQ00444313 Add scaling factor for outside heat transfer coefficients

CQ00439350 Fixed incorrect nozzle velocity

CQ00436962 Corrected outlet summary reporting of liquid properties at inlet

when liquid fraction is zero

32 Software Fixes

Aspen Fired HeaterThis section describes the software fixes to Aspen Fired Heater.


CQ00445573 Fixed a case not running and no error message given when no

gaseous fuel composition set

CQ00441564 Increased the temperature limits for flue gases

CQ00440448 Report tube and fin peak temperatures separately

CQ00437854 Output more details of peak tube temperature calculation

CQ00432406 Automatically calculate temperature drop of flue gas given

combustion air preheat

CQ00431142 Correct missing roof tubes in Firebox diagram

CQ00430924 Corrected flue gas properties not being reloaded

CQ00387718 Draught calculations added to results

CQ00386012 Flue gas properties added to results

Aspen Plate ExchangerThis section describes the software fixes to Aspen Plate Exchanger.


CQ00440911 Fixed heat balance method

CQ00411757 Fixed range checking for input parameters in the Process Data

section

CQ00403857 Added plate thermal conductivity to results

CQ00386029 Input Diagram: Correct plate area in Input Diagram

CQ00367649 Corrected crash in temperature cross cases

CQ00273264 Corrected Dew/Bubble point in results forms

Software Fixes 33

Aspen Plate Fin ExchangerThis section describes the software fixes to Aspen Plate Fin Exchanger.


CQ00450146 Fixed negative stream 1 Outlet distributor length in design mode

CQ00449391 Corrected a problem loading a MUI file with single phase vapor

stream with T-h data

CQ00448670 Corrected Labeling of Overall Summary > "Outlet temperature as

input", to allow for the fact that it may not match Process Data >

"Outlet temperature"

CQ00448267 Corrected several issues in crossflow exchangers with multi-pass

crossflow finning for multiple streams

CQ00445808 Fixed blank Hardway Hydraulic Diameter and Flow Area Per Unit

Width

CQ00441651 Improved thermosiphon/kettle flow iteration that preserves a heat

balance when the flow is updated

CQ00435733 Enhanced the program to handle hardway fin only

CQ00430429 Fixed incorrect height of return to column for thermosiphons in

MUSE file output

CQ00429206 Corrected PlateFin kettle calculating significantly different

recirculation rates than MUSE crossflow

CQ00385036 PlateFin printing: output missing labels, there are extra blank

pages

CQ00435300 The EDR install now correctly registers the COM component which

displays the layer type diagram.

CQ00256072 Fixed a crash with 20 stream exchanger

Aspen Shell & Tube ExchangerThis section describes the software fixes to Aspen Shell & Tube Exchanger.


CQ00450814 Fixed estimation of a kettle diameter when not supplied is outside

of the expected range

CQ00449084 Fixed labeling: Area reqd./act. should be Area act./reqd.

CQ00448875 Fixed a problem with No-U-bend heat transfer with unbaffled

exchangers (and a bug with Longitudinal fins and U-bends)

CQ00446108 Fixed a problem with unit of tube OD shown incorrectly in

Mechanical Summary

34 Software Fixes


CQ00441173 Fixed a problem where components are not displayed completely

on the Input Summary

CQ00439927 Fixed a problem opening a HETRAN file when no license is

available

CQ00438754 Corrected shellside knockback condenser for a one pass unit

showing the tubes side nozzles on the same head

CQ00438211 Corrected area in the overall summary for double pipe HX

CQ00437689 Fixed a problem with NTIW and use existing layout

CQ00436168 Improved documentation for the interactive tubesheet layout

CQ00431701 Corrected setting plan for vertical E shell side knock back

condenser

CQ00413614 Clarified documentation for distances in X shell

CQ00417579 Fixed displaying of Latent heat in TEMA sheet for Advanced mode

Aspen Shell & Tube MechanicalThis section describes the software fixes to Aspen Shell & Tube Mechanical.


CQ00450103 Corrected the static head calculation output for kettle shells. Theprogram was using the wrong kettle diameter.

CQ00449993 Corrected a problem with the lifting lugs calculation for kettleunits. The program was using the wrong shell radius.

CQ00449823 Changed panel output formulas for UHH-13 to better match theactual formulas in the code.

CQ00449586 Corrected the equivalent diameter for the tubesheet shearcalculation for U-tubes under the EN code.

CQ00449453 Changed the C factor in the tubesheet calculation when calculatingthe unperforated area using UG-34.

CQ00448297 Corrected a problem with the Minimum Design Metal Temperature(MDMT). It was being calculated incorrectly for the body flangesunder certain situations.

CQ00448284 Added saddle fillet weld leg sizes to differentiate the saddle basedepth dimension from the saddle depth dimension at the shell-to-saddle contact point.

CQ00448060 Provided additional warnings when the gasket compression stressis larger than the yield stress of the flange material. Under theseconditions, the gasket may damage the flange bearing surfaces.

CQ00447872 Added a message to alert the User when he/she enters a gasketdesign factor 'm' that could result in poorly designed body flanges.

CQ00447662 Corrected a problem with the mean gasket diameter for the rearhead flange at tubesheet for a 'W' type head. It did not match theinputted data provided by the User.

Software Fixes 35


CQ00447282 Corrected a problem with issuing Note 810 instead of note 809.When the tube-to-tubesheet joint is expanded-only, if thecalculated UHX tubesheet thickness is less than the clearancesrequired for the expansion process, a warning will be issued if theUser specified the tubesheet thickness. Otherwise, a note will beissued if the program increases the tubesheet thickness toaccommodate the expansion clearances.

CQ00447440 Corrected user interface (UI) problem. The User selection ofnozzle external loads calculation type was being changed by theUI when the file had the old list (prior versions). Also correctedname of method from 'RGB' to the correct 'RGP'.

CQ00447212 Corrected a problem with the weights. The program was notprocessing correctly User specified empty, piping and accessoriesweights.

CQ00446274 Upgraded output for wind and seismic load calculations per NBCC.Added overturning moment to detail output.

CQ00446730 Corrected an output problem with the allowable stresses beingshown in the elastic-plastic procedure for a fixed tubesheetexchanger.

CQ00446467 Corrected the appearance of warning 335 for cases when thewarning was not needed.

CQ00446069 Added nozzle descriptions and accessory weights descriptions toinput and output.

CQ00445961 Corrected a problem with the program attempting to design ashell cover cylinder when none is required.

CQ00445571 Corrected a problem with the saddle support friction factor. Undercertain conditions the saddle friction factor was being appliedtwice to the horizontal loads.

CQ00445462 Corrected a problem with the floating head backing ring flangerecess dimension.

CQ00445446 Corrected a problem with nozzle external loads per WRC-107when the nozzles are located on formed heads. The program wasusing an incorrect head dish radius.

CQ00445173 Corrected a problem with an overstressed design. The programwas designing a unit that was overstressed at the tubesheet-to-channel junction and now warning was given.

CQ00445098 Corrected a problem with the tube compressive stress. It wasflagged as exceeding the allowable in the tubesheet detailcalculation section when in fact the tube compressive stress wasunder the allowable.

CQ00444843 Corrected the default saddle location for second saddle. Theprogram was placing the saddle too far away from theflange/tubesheet.

CQ00444566 Changed the calculation of allowable stresses for ASME austeniticmaterials in the European code (EN). The available yields forASME materials are different than specified in the EN code. Willuse the available yield for the calculation of the allowable stress.

CQ00444486 Corrected a problem with the nozzle weld size in the nozzlereinforcement area calculation. The reinforcement area for thenozzle weld was incorrect.

36 Software Fixes


CQ00443841 Corrected a problem with the differential design pressure for U-tube exchangers. The program was not using the correctdifferential design pressure specified.

CQ00442381 Clarified the Code detail ouput in tubesheet design underdifferential pressure for U-tube exchangers.

CQ00442364 Corrected a problem with inputted liftling lugs dimensions. Nowarnings were being provided when the inputted lifting lugsgeometry values were less than recommended.

CQ00442266 Corrected a problem with the exchanger side specification in theMAWP output for nozzle number 10. The program was placing thenozzle in the wrong side.

CQ00442264 Corrected a problem with body flange design in the Europeancode. The program was not using the gasket rib area in the bodyflange calculation.

CQ00441878 Corrected a problem with the warnings concerning overstressingof the front shell flange. The flange in fact was not overstressed.

CQ00441877 Corrected a problem with the nozzles piping interconnectingweights (IW). The shell side weights were being included twice.The tube side nozzle piping IW were being ignored. Neither werebeing added to the operating weight, only to the full weight.

CQ00440903 Corrected a problem with the input for the bolt area ratio. Theprogram was violating the minimum bolt spacing in design modewhen the user selected input for minimum bolt area ratio.

CQ00440761 Corrected a problem with the tube expanded length. It was notbeing provided in the TEMA tubesheet calculation.

CQ00440589 Corrected a problem with the calculation of the cone length forexternal pressure compressive stress calculations per ASME VIII-1App. 8.

CQ00440218 Corrected a problem with the floating head cross over areacalculation per TEMA RCB-5.11. It was not being correctlycalculated and was not being shown in version V7.3.1.

CQ00440104 Corrected a problem with the calculation of nozzle reinforcementper VIII-2 section 4.5. The program was not calculating the shellcompressive stress correctly.

CQ00439967 Incorrect Stiffness Multiplier per figure TEMA 1999 RCB-8.51.Program was using the wrong expansion joint radius.

CQ00439385 Corrected a problem with the lifting lugs. A warning was notbeing provided in the detail lifting lugs section when the User-specified geometry was not adequate.

CQ00439200 Corrected a problem with the Minimum Design Metal Temperature(MDMT) incorrect. The program was defaulting to the wrongmaterial.

CQ00438587 Corrected a problem with the output for external nozzle loads perWRC-107 in component design module. The calculation enginechanges and the component module panel format were out ofsynchronization.

CQ00438476 Corrected a problem with the tubesheet flanged extensionthickness calculation. It was not being performed correctly for aCEU type exchanger.

CQ00438240 Corrected a problem with the lap joint ring flanges shear stresscalculation. It was not being shown on the calculation report.

Software Fixes 37


CQ00438262 Corrected a problem with the number of baffles in the Bill ofMaterials. For some exchangers, the BOM was showing one extrabaffle.

CQ00438120 Corrected a problem with the inputted accessory weight. It wasnot being added to the empty or operating weights.

CQ00438044 Changed method to calculate the material design strength valuesfor certain ASME materials (e.g. Titanium) when used with theEuropean code (EN)

CQ00437952 Corrected a problem with shell side weld overlay thickness. Theprogram was not properly taking the OL thk into account

CQ00437801 Corrected a problem with the nozzle reinforcing material in theEuropean code (EN). The material was not being shown in thenozzle reinforcing detail calculation for the European code.

CQ00436397 Changed formula for lap joint body flanges to show LJ ring contactdiameter G1 instead of gasket reaction diameter G.

CQ00437500 Corrected these issues with a 'P'-type rear head exchanger: Noinput material cells for the rear head cover flange and incorrectbarrel OD for the floating tubesheet.

CQ00437367 Corrected a problem with the hydrostatic test pressures onsummary report. The values reported where incorrect for thehydro calculation case.

CQ00437070 Corrected a problem with the backing ring flange rigiditycalculation. The BR flange rigidity thickness was not being usedfor the actual BR flange thickness.

CQ00436659 Corrected wind longitudinal and tranversed load labels. They wereincorrect in detail calculation report for NBCC 1995.

CQ00436397 Separated gasket reaction diameters G and G1 per ASME codechanges for lap joint flanges. Doing this makes the gaskettreatment the same for all ASME flanges.

CQ00436263 Corrected the rear head cone length calculation. The program wasusing the wrong small cone diameter.

CQ00435394 Corrected problem with the floating head flange inputted gasketthickness. It was being ignored by program.

CQ00435792 Corrected minimum thickness calculation in component designmodule.

CQ00435094 Simply supported tubesheet design procedure incorrectly apply.Some coefficients were not being zeroed out as required by theprocedure and a warning (528) was being issued in error.

CQ00435044 Mean metal temperatures data transfer from multiple shells. Nowmechanical will use the mean metal temperatures from the firstshell transferred from thermal. A message will be issued.

CQ00434389 Corrected a problem with the rear head cover. It was not beingdesigned for a floating head type exchanger, required for thisexchanger type.

CQ00434386 No warning was being issued when the User selects the TEMA boltspacing correction factor and ASME lethal service. These arecontradictory specifications.

CQ00434373 Actual bolt spacing correction factor calculated not shown. Addedit to detail output.

38 Software Fixes


CQ00434302 Corrected a problem with the nozzle external load calculations perWRC-107. It was not being performed even though the geometryparameters were within acceptable range of the design procedure.

CQ00433624 Corrected a problem with inputted nozzle flange ratings. Theselection of 'Tri-clamp' is not a valid nozzle flange rating option soit is being discarded in processing the nozzle flange rating.

CQ00433398 Corrected refreshing of drawing labels in input summary form.Now the User will see the drawing descriptions.

CQ00433316 Corrected a problem with the calculation of the thickness for thetubesheet unperforated area in a No-Tubes-In-Window design.The unperforated area height and chord lengths were incorrect.

CQ00432971 Corrected the calculation of the final backing ring flange thicknesswhen a recess is present. The program was not properly takeninto account the recess and the corrosion allowance on the sameside.

CQ00432962 Corrected issue with the User-specified nozzle dome weld leg size.The program was ignoring this input.

CQ00432731 Corrected the bolt circle calculation for a reverse flange.

CQ00432538 Corrected a problem with the tube stress calculations. Theprogram was not assigning the correct calculated values againstthe allowable values. This resulted in no warnings in some casesand incorrect warnings in others

CQ00432440 Corrected a problem with the fabrication tolerance. The programwas not taking off the fabrication thickness tolerance from thevessel wall thickness in the nozzle reinforcement calculations.

CQ00432133 Corrected the material default file entries for generic material #6(304SS). The pointer was also set for some 304L materials.

CQ00432109 Corrected a problem with warnings in detail calculations of nozzleexternal loads per TEMA RCB-10.7.

CQ00432035 Corrected a problem with the head minimum thickness percompressed air service or steam service. The program was notincluding in the final thickness the material tolerance.

CQ00431500 Corrected a problem with the implementation of UG-99(b) ASME2010. The hydro test exemption for bolting material calculationwas not clearly shown.

CQ00431222 Made the flanged-and-flued TEMA-type expansion joint outercylinder thickness the same as the flexible element thickness isdesign mode.

CQ00430911 Corrected a problem with the channel stress. The value shown onthe warning could not be found on the detail output. Also, theoption to display both conditions, new and corroded, was notworking properly.

CQ00430829 Corrected a problem with the dished-only head radiography leveland joint efficiency shown on output.

39

4 Known Issues

This chapter contains a summary of known issues or limitations relating tothis release. Workarounds are suggested where possible.

Aspen Exchanger Design andRating

Known Issue Workaround/Comment

CQ00392063 – Labels are missing in

Headings / Remarks

In Input | Problem Definition |

Headings/Remarks, the labels such as

Company:, Location:, Service of Unit:,

etc., are missing for new cases.

Affects all EDR applications.

Select Tools | Program Settings,

Headings/Drawing tab and click OK.

This only need be done one time;

thereafter, the labels are present.

CQ00397130 –Selecting File | Openafter exporting an EDR file to Excelcauses EDR to crash.


Export to Excel, and then close and reopenEDR.

CQ00378264 – EDR fails to identify the

property method specified in the AspenProperties aprbkp file.


EDR does not display the Aspen Propertiesproperty method in imported .aprbkp orreferenced .aprpdf files; EDR alwaysdisplays AMINES. This is a display issueonly; the Aspen Properties methodspecified in the Aspen Properties file isused.

CQ00448491 - On systems where themachine policy disables the launch of theregistry editing tool, installing ExchangerDesign & Rating V7.3.2 or EconomicEvaluation V7.3.2 may cause thefollowing error: Registry editing hasbeen disabled by your administrator

Run the following command to allow theregistry editing tools be used on themachine:

REG addHKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System/v DisableRegistryTools /tREG_DWORD /d 0 /f

40

Aspen Fired Heater


CQ00452232 - FiredHeater has incorrectenumeration items for the “Peak tubetemperature calculation method”(Program Options | ThermalAnalysis | Firebox). The enumerationsitems should be:

0 – Set Default

1 – Fixed heat flux ratio

2 – Adjusted heat flux ratio.

Substitute the existing enumerationitems with the items described to theleft.

Aspen Shell and TubeExchanger


CQ00430263 – Import from an AspenPlus block, such as HEATER, shows anegative pressure drop in EDR Processdata.

Affects Shell&Tube.

If the inlet stream pressure is less thanthe block pressure, a negative pressuredrop will be imported. The workaround iseither to specify a pressure drop for theblock or change the inlet and/or blockpressures to ensure a positive pressuredrop.

For a block with multiple feed streams,the lowest stream pressure is used in theEDR Process data. One workaround is toadd a mixer block upstream of the blockand make sure a positive pressure dropresults.

The Advanced method is not yetavailable for kettles.

Affects Shell&Tube.

None. The Standard Method gives well-proven results.

Nozzles on the side of an exchanger, asagainst on the top or bottom, are notcorrectly displayed on the Setting Plan.

The Example Files provided with theprogram have exchanger materials (andother text strings) omitted from theoutput.

Re-run the files and the missing outputsre-appear.

If the option [undefined] is selectedfor Gasket Materials in Input |Construction Specification |Materials of Construction |Cladding/Gasket Material, theprogram will not run.

A gasket material must be selected.

41

There are problems in some areas withcalculated shellside heat transfercoefficients and pressure gradients for Xshells using the Advanced method.

Shellside heat transfer coefficientsmight be inaccurate for X-shells with4 or more passes

Shellside pressure drops might beunderestimated by a factor of up to 4if there is an in-line pass partitionlane, and possibly by a larger factor ifthere are multiple pass partitionlanes.

The Standard method should be used asan alternative in such cases.

Aspen Plate Fin Exchanger


The Layer Types form in Input |Exchanger Geometry is blank inWindows 7 64-bit running the Germanlanguage pack.

The problem is caused by a failedcomponent registration. To fix:

1. Run the EDR Version Control Utilityfrom the Start Menu.

2. Select Version 26.0.

3. Click the Fix current version button.

42

AspenEDRV7 3 2-Rel

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