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Problem Statement: What is the best exchanger configuration for tubeside, vertical condensation? | Solution: There are 2 choices for condensation inside vertical tubes:
1. The normal condenser has the vapor entering at the top with downward flow of both the vapor and condensate.
2. The knock-back condenser is the alternative. With a knockback condenser the vapor enters from the bottom. As the condensate f... |
Problem Statement: Excess demand (orders) and shipments during the present time period in DM is consuming the next time period's forecast. | Solution: Adjust the Demand Plan Option switches in the APPDATA table switches:
(DMPLNET_LABS) Net Abs Left - # of Net Abs Pds to left [0-n] - Limits the number of prior months in which excess orders can be netted out of the forecast. Set to zero for no netting of the forecast.
(DMPLNET_LREL) Net Rel Left - # of Net Pd... |
Problem Statement: You have a CDM case you need to work on but are unable to view any menus upon opening the model. Why is this? | Solution: One of the reasons for this message to occur is when table $TCASES (defines the fully qualified file name of each remote case) does not point to the correct paths or remote cases of the Shared Libraries.
In order to resolve this problem, load your CAPS case file, open any set or tables and open the Attribute... |
Problem Statement: How to resolve the following error message while opening Exchanger Design and Rating interface? | Solution: EDR temporarily stores all the recent files for quick accessibility. When this memory reaches a limit, EDR informs the same to user with the above dialog box. Clicking on Yes, clears the temporary memory without removing the actual files from the location. While clicking on No, still allows the user to start ... |
Problem Statement: When the data was published from any application with a specific publisher topic in order for the Aspen Reporting Framework (ARF) to start listening to that topic and update the ARF database the same topic name called subscriber topic needs to be added within ARF. This | Solution: outlines how to add these Subscriber topics from the ARF GUI.Solution
Go to Start-->Programs-->Aspentech-->Aspentech Infrastructure-->Aspen Reporting Framework which opens up the ARF Administrator window.
? Navigate to the Configure Operations tab in the ARF Administrator and click on Add Button nea... |
Problem Statement: What is the definition of Predictor / Price and when is it used? | Solution: A predictor may help to explain the behavior of the series being forecast.
Some examples of predictor are
? Weather
Crude Prices
Government metrics e.g. Durable goods index, CPI ?
Working days in a month
Keywords: None
References: None |
Problem Statement: When opening an Exchanger Design and Rating (*.EDR) file, the program crashes. | Solution: There have been a few occasions when opening an EDR file the program crashes. The crash generally seems to occur just after the program has reported connecting to local server for Aspen Properties.
The workaround is to open the file in a text editor, like NotePad, for example and save. It is suspected that wh... |
Problem Statement: How can I model heat exchangers with a different number of tubes in each pass? | Solution: From Aspen Shell & Tube Exchanger V7.20 onwards, it is possible to specify passes with a different number of tubes as given inSolution #128490.
In older versions of Aspen Shell & Tube Exchanger it is only possible to model exchangers with the same number of tubes in each pass. On some occasions users wish t... |
Problem Statement: In APC Builder, the master model can be updated by various cases. However, only one trial (TTSS) is selected to update the master model. If the master trial is changed, there is no way to know which trials of the case the curve comes from. | Solution: The master model in APC Builder can comprise of response curves from several cases. If you want to know which case is used to update the curve in the master model, go to the master model node and select on that response curve. The cases that have the response curves will be highlighted; Yellow highlight is ... |
Problem Statement: Is Aspen Collaborative Demand Manager supported in a virtual environment? | Solution: The following table illustrates Aspen Collaborative Demand Manager (listed as Aspen Chemical Supply Chain) and the supported virtualization technologies.
Virtualization Technology
Aspen Chemical Supply Chain
VMware ESX Server
Yes
Microsoft Hyper-V
Yes
Citrix Presentation Server
Yes
Microsoft Terminal Server
Y... |
Problem Statement: I am unable to pass data between Aspen Tasc+ and Aspen HYSYS. | Solution: 1. Go to START | Program Files | .... | Aspen HTFS+ 2006(or 2006.5) | Version Control Utility and select version 20 for 2006 version or 21 for 2006.5 version. Next, go to START | Program Files | ..... | Aspen HYSYS 2006 (or 2006.5) | Restore File Associations.
If the above procedure does not solve the probl... |
Problem Statement: Is it possible to make sure the outlet stream is at saturated condition, either a saturated liquid or saturated vapor? | Solution: The saturation temperature may not be known because exact pressure drop has not been determined. In order to specify saturated conditions, specify a vapor mass fraction equal to 1 (for saturated vapor) or 0 (for saturated liquid) and keep temperature empty. You must keep the flowrate field of the desired stre... |
Problem Statement: Why are the nozzle sizes in TEMA are different than my specifications? | Solution: The nozzle size in TEMA can be different that the specifications when whenever there are incomplete nozzle size specifications.
Entering only the nominal diameter specification is not enough. You have to specify actual OD and ID or wall thickness. If you enter only a standard nominal diameter, Tasc+ uses a ... |
Problem Statement: When a user trying to log into the Collaborative Forecasting application, the server returns the following unexpected condition error message:
Note: Administrator - can login and add a new user to Aspen Collaborative Forecasting. | Solution: This error can also appear when the AeBRSSLM.dll DLL is missing in the CF domain folder. You can get it from the attachment to this document: put it into the domain folder and then restart the server.
Keywords: Collaborative Forecasting
Encountered
Unexpected condition
Fulfilling
Request
Server error
CF login... |
Problem Statement: In Aspen Properties V7.2 and newer versions, new steam table data such as ?IAPWS-1995? was introduced. Since Aspen Properties can be used inside of Aspen Exchanger Design and Rating (EDR) when generating stream physical properties, it is possible to use this steam table in EDR now for physical proper... | Solution: describes how to use and its validity range/circumstances.
Solution
Firstly, users need to make sure Aspen Properties V7.2 or newer is installed and registered properly, whereSolution 126231 can be consulted.
After Aspen Properties is installed and associated with EDR properly, go to Input | Property Data |Ho... |
Problem Statement: When I run a Shell & Tube Exchanger case, the calculation stops and gives error message input Error 1122 ? The data input for Number of tube passes, 1 is beyond the permitted range, from 2 to 16. Where does this error come from and how can it be resolved? | Solution: This error is due to the user specifying the numbers of tube pass as 1 combined with a U-tube rear head type. These inputs can be found either on the Input | Exchanger Geometry | Geometry Summary | Geometry tab, Input | Exchanger Geometry | Shell/Heads/Flanges/Tubesheets/Shell/Heads tab or the Input | Exchang... |
Problem Statement: If deresonating baffles are used in designing a heat exchanger, how is an external user informed of the deresonating baffles? | Solution: As of now, Aspen Shell & Tube Exchanger does not display deresonating baffles in TEMA sheet or setting plan.
The user can add information on deresonating baffles in the remarks column under Problem Definition-> Heading/Remarks-> TEMA Specifications Sheet.
Keywords: Deresonating baffle, EDR, TEMA sheet
Referen... |
Problem Statement: When importing process and property data from Aspen HYSYS to Aspen Tasc+, certain streams may carry additional information that result in warning messages being generated in Aspen Tasc+. This is of particular concern for streams in Aspen HYSYS leaving a 3-phase separator. | Solution: In Aspen HYSYS, if a vapor product stream from a 3-phase separator is attached to a heat exchanger and you import the process and property data from that heat exchanger into Aspen Tasc+, you will ultimately transfer the properties of all three phases present in that vapor stream (the existing vapor phase, and... |
Problem Statement: How do I set token limit user alerts through the Aspen Licensing Dashboard? | Solution: This KB article explains how to set user alerts through the Aspen Licensing Dashboard. For information regarding installation and configuration of the Aspen Licensing Dashboard, please see KB 146044.
Setting Alerts
You can use the Set Alerts button on the Aspen Licensing Dashboard screen to enable email or ev... |
Problem Statement: Aspen Supply Chain Connect users are using Informatica 8.6.0 to get material on orders data from SAP and put them into Demand Manager 2006.6. Is Informatica Powercenter 8.6.X is going out of standard support? | Solution: Informatica PowerCenter 8.6.X end of standard support will be on December 2011. Informatica yet to announce End of Extended Support for 8.6.X.
Keywords: Informatica PowerCenter 8.6.X
End of support
End-of-Life
Informatica products
References: None |
Problem Statement: Fouling factors reported in TEMA sheet do not match the fouling factors specified in the process data sheet. How does Aspen Tasc+ calculate the fouling factors reported in the TEMA sheet? | Solution: Fouling factors found on the Input | Process Data page are based on local area (i.e. tube ID for tube side, finned area for finned tubes).
Output fouling factors and heat transfer coefficients are calculated relative to the standard reference area (based on the tube OD).
Output tube side fouling (based on... |
Problem Statement: How do I use the validation routine when using CUSFMT or CUSSQL import options when importing material master? | Solution: To get the processed records and accepted records reflected correctly, please put APPEND RECCNT NEXT NULL ACTUAL at the very beginning of the FMTDATA statements (PROMAST).
To get detail information in validation log, for CUSSQL method because the DM tool can?t recognize the custom validation logic in the FM... |
Problem Statement: How do I update McAfee protection rules to enable Email option in Sharepoint?
Several features of Aspen Search use SharePoint including: Email, Alerts.
In order to be able to Email a search result to a colleague, or trigger an alert whenever an item is changed, email must be correctly configured on t... | Solution: addresses this problem.
Solution
1. Open McAfee VirusScan Console
2. Select Access Protection
3. Click the Task menu and select Properties, and the Access Protection Properties window comes up.
4. On the Access Protection Tab, select Anti-virus Standard Protection category
5. ... |
Problem Statement: After running the file, the Input Error 1198 appears in Results | Results Summary | Warnings & Messages.
How can I get rid of this error? | Solution: Incorrect shell nozzle locations can lead to flooding in condenser shells. As the message states, the shell inlet nozzle has to be at the top and the shell outlet nozzle must be at the bottom to prevent the shell flooding during the condensation.
To modify the nozzle location, you must go to Exchanger Geometr... |
Problem Statement: How to changed default unit set in EDR? | Solution: To change default unit set in EDR, please go to File and then click on Options page to open Program settings window.
In Program settings window go to General page and Click the pull-down arrow next to the units of measure option to change default unit set and Click OK to save the change.
Please find below scr... |
Problem Statement: How does Optimal Forecast Method handles set DMPST and forecasting parameter ERRCALC in Aspen Collaborative Demand Manager? | Solution: DMPST (Past periods set) contains 24 periods and forecasting parameter ERRCALC (Number of past periods to be used to compare forecast and shipments - Default value is 6) is set to 6.
In this specific example, does the optimal forecast method selection process ignore the first 18 periods ?
No. It fits each met... |
Problem Statement: How do you save the Tasc+ TEMA Sheet in an Adobe Acrobat PDF format? | Solution: Tasc+ does not have an option to directly create PDF files for the TEMA datasheet or any of the other HTFS+ results forms. If you have the Adobe Acrobat PDF Writer software (or one of the many inexpensive or free PDF writer work-alikes), you can PRINT the TEMA data sheet and choose the PDF print driver from t... |
Problem Statement: In Exchanger Design & Rating (EDR) V7.3.1, you can enter the percentage of the Impingement plate perforated area for values between 1 to 100. Values less than 1% are taken as a fraction. | Solution: In Aspen Shell &Tube Exchanger, Input | Exchanger Geometry | Nozzles | Impingement | Impingement plate perforated area, the % value is not applicable for whole range (0-100%). For values lees than 1% Shell & Tube handles it as a fraction in order to be able to import files from V7.30 or older without any corr... |
Problem Statement: 在Aspen Properties (物性程序) V7.2和以上版本里，一个新的蒸汽表数据'IAPWS-1995'被引入了。既然Aspen Properties (物性程序)可以在EDR (换热器)程序里面使用，现在在EDR (换热器)程序里面这个新的蒸汽表也能被用户使用了。此解决方案详细讲述怎样在EDR里使用它，以及它的可用区间。 | Solution: 首先，用户要确保Aspen Properties V7.2或者更高版本已经正确的被安装和注册。关于此详细信息可以在解决方案126231里找到。
在确保Aspen Properties V7.2或者更高版本已经正确的被安装和注册及连接到EDR后，用户应该到Input | Property Data |Hot/Cold Stream Compositions | Property Methods 界面，从物性方法的下拉菜单里选择'IAPWS-95'。
请注意，只有在Aspen Properties V7.2或更高版本与EDR连接使用时，此新的蒸汽表才会可用。
然后，用户应该到Input | Property Data... |
Problem Statement: Installing TASC 2004.2 after TASC+ 2004.2 was installed cause both software versions stop working. Now the following error appears:
Error: unable to load dynamic library zetasc | Solution: 1. Check the active version of Tasc+. Click on the Windows START button, then go to Programs | AspenTech | Aspen Engineering Suite | HTFS+ 2004.2 | Version Control Utility. Make sure the version control utility is pointing to the correct version (13.3), if not, please change the version:
2. Manually correct... |
Problem Statement: General rules for avoiding instability (warning) in a thermosiphon. | Solution: General rules for avoiding instability (warning) in a thermosiphon:
1. Since instabilities are associated with two-phase effects, ensure that a significant fraction of the pressure drop around the loop occurs in the single phase region (i.e. inlet pipe network). It can be achieved by
placing valve in the inle... |
Problem Statement: Sometime when users open their *.EDR cases, they find the tree-menu on the left hand side of the diagram has disappeared. If they do not know how to restore it, it will be very inconvenient. | Solution: The reason why the tree-menu has disappeared is because the ''Hide Folder List'' button has been clicked down accidentally, as shown below.
This is for better view of information on certain folders. As soon as users want to move to other folders, they can restore the tree-menu by clicking up the ''Hide ... |
Problem Statement: When performing a search, the following error is displayed:
The attempted operation is prohibited because it exceeds the list view threshold enforced by the administrator. | Solution: The problem is occurring because the default SharePoint setting is to limit database operations to 5000.
The reSolution to this error is:
1. Login to the Aspen Search server machine as the installation administrator.
2. Open SharePoint 2010 Central Administration.
3. Go to Application Management > Manage We... |
Problem Statement: How are diametric clearances defined? | Solution: Baffle OD to shell ID diametric clearance: twice the average distance between the baffle's edge (uncut portion) and the inside shell wall of the shell
Shell ID to Outer Tube Limit diametric clearance: twice the distance between the inside wall of the shell and the outside wall of the outmost tube
Keywords: ... |
Problem Statement: Why am I unable to publish or re-publish from Aspen Collaborative Demand Manager (CDM) to Aspen Collaborative Forecasting (CF)? Publish/republish does not complete. When I check CF the last republish date is in the past and the data in CF does not match DM.
Its possible that I can possibly see an err... | Solution: Check to see if the sets OVERRIDS and SOVERRID are in sync. The two sets must contain the same data in order to publish/republish from DM to CF. Delete the data in SOVERRID that is not in OVERRID and re-run republish.
Keywords: Publish
Re-publish
References: None |
Problem Statement: How do I configure Aspen Search when the test to confirm the connection to network share resources doesn't pass? | Solution: To identify the cause:
Verify the credentials for the SOLR search engine
Verify the LDAP configuration domain name and domain account credentials
To verify the SOLR search engine credentials:
1. Open Internet Explorer and enter the following URL:
http://<Aspen Search Server Name>:8080/solr/admin/
2. Enter... |
Problem Statement: If your Aspen Search fails to process new or updated models, or services no longer work as expected, this might be the result of a password change on the Installation administrator?s account. If the Installation Administrators account has recently undergone a password update, follow these steps to r... | Solution: If the Installation Administrators account has recently undergone a password update, follow these steps to resolve the issue:
Services
1. Open Services manager (Start | Administrative Tools | Services)
2. Right Mouse Click: Apache Tomcat 7 and select Properties
3. Select the Log On tab
4. ... |
Problem Statement: The user has an AKU shell, with steam inside the tubes and a boiling liquid on the shell side. Aspen Hetran assumes he wants the first pass (top half of the u tubes) to receive the hot steam (horizontal partition). In his heat exchanger, the partition is actually vertical, so the hot steam goes into ... | Solution: It will not impact the thermal calculations. Steam will be condensing isothermally (no impact on the MTD). The film coefficient will also not be affected. The coefficient is also so high for steam that it has very little affect on the required surface area.
The only problem will be with the tubesheet layout d... |
Problem Statement: I am upgrading a file in Simulation or Rating mode that has User specified properties in both vapor and liquid phase, from V8.4 to any newer version.
The results of the overall film coefficients do not match between versions, the key results as area ratio or outlet temperatures are inconsistent betwe... | Solution: This error can happen when values entered manually for Vapor mass fraction has been omitted as shown in the screenshot below:
Even though there are only vapor properties, and that the vapor mass fraction would be 1, if this value is left empty, the program could perform an extrapolation of the properties, thu... |
Problem Statement: No vibration analysis is given for an un-baffled axial flow exchangers | Solution: Vibration calculations are performed for X-shell (un-baffled, but with support plates), but not for un-baffled axial flow exchangers, like an E shell for example.
Vibration is in general excited by crossflow over a tube bundle. With an axial flow bundle, it can be argued that excitation forces for vibration a... |
Problem Statement: Why bubble and/or dew point does not match with Aspen Plus or HYSYS flash? | Solution: If you have properties data at only one pressure level or two pressure levels with significant pressure difference, then you may observe some difference in the bubble and/or dew point from Aspen Plus or HYSYS. The error comes due to error introduced during interpolation. There are two things you can do to min... |
Problem Statement: In Aspen Shell & Tube Exchanger, on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab the program reports ''Bundle Entrance Flow Area'' and ''Bundle Exit Flow Area'' values in the Rho*V2 analysis section. How are they calculated? | Solution: The Bundle entrance and exit flow areas are output on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab. They are calculated according to the methods given by TEMA. From TEMA 9th Edition (2007), the flow area calculations are described in details in Section 10 ''RGP-RCB-4.62 SHELL OR B... |
Problem Statement: Acoustic resonance is normally important only in gases as the speed of sound is normally too high in liquids. It occurs when the frequency of an acoustic wave in the heat exchanger coincides with the tube natural frequency. It should be noted that even if the acoustic wave does not cause tube vibrati... | Solution: The acoustic frequency is used as characteristic frequency in lock-in effect.
The acoustic frequency of the shell can be altered by inserting a deresonating baffle (also called detuning or acoustic baffle). This is a plate placed parallel to the direction of the crossflow to alter the characteristic length. I... |
Problem Statement: As described in | Solution: 127550, Aspen Shell & Tube Exchanger program conducts Rho*V2 analysis by calculating the Rho*V2 values in the various region inside the exchanger and comparing them with the TEMA recommended limits. If the TEMA limits are exceeded, ''Operation Warning 1341'' will be generated.
This is straightforward for si... |
Problem Statement: AspenONE Process Explorer automatically associates a userID to a comment regarding a particular tag. Can I changed the userID of the comment? | Solution: All comments are added to the history repeat area of the record Comments defined IP_CommentDef. The username associated with the comment can only be edited programmatically using Aspen SQLplus by changing the field IP_CMT_SUBMITTER in the proper occurrence. Alternatively, the comment can programmatically b... |
Problem Statement: What is the fouling calculation option? How it is considered in maximum fouling calculations? | Solution: The fouling calculation option determines how the program will determine the maximum fouling on each side.
Program will default to the actual hot / cold side ratio.
Fouling calculations determine the exchanger fouling that would lead to a specified duty.
Some shell side or tube side fouling may be initially... |
Problem Statement: The aspenONE Process Explorer (A1PE) search invoked from the A1PE Admin page can be stuck after a scan is initiated.
This is mainly due to the improper resource allocation for the Aspen Dispatch Service and the Apache Tomcat Manager Service.
In order to resolve this error, try the steps mentioned in ... | Solution: Search can freeze or crash when Aspen Security is configured for the InfoPlus.21 Database.
In this case, the memory pool for the Tomcat Service needs to be increased.
1. Open Tomcat7w.exe located in <AspenTech Shared>\Tomcat7.0.57\bin. Click on the Java tab
Maximum memory pool is by default 256MB. The m... |
Problem Statement: Aspen Tasc (HTFS), Aspen Hetran (B-Jac) and Tasc+ seem to have many overlapping features. Which product should be used when and why? | Solution: Currently, there is some confusion among our customers over our current heat transfer products. We are going through a transition stage as we replace certain products.
Aspen Tasc+ is our new thermal design program for shell & tube heat exchangers. It does the complete thermal design (including vibration analy... |
Problem Statement: 在Aspen EDR (换热器)程序里，用户可以选择使用自定义的物质组分，作为单一物质或混合中的一部分。用户需要先在Aspen Properties (物性程序)里将自定义组分定义好，然后将Aspen Properties与EDR程序连接到一起。
用户可以在EDR内生成物性数据，并在相应界面里观测到具体数据。
但是，当完成连接后，把这些带有自定义组分的EDR文件进行保存后再重新打开此文件时，之前添加的自定义组分会消失不见。
此即决方案将讲述怎样使用、调整Aspen EDR(换热器)和Aspen Properties (物性)程序之间链接功能里的Advanced Options (高级选项)来... | Solution: 这个问题的原因，是因为用户之前选择了'Import existing Aspen Properties (.APRBKP) file'选项来连接Aspen Properties 文件和EDR文件。
用户应该选择?
Keywords: 用户自定义组分，非数据库组分，Aspen Properties (物性), Aspen EDR (换热器), 保存重新打开,,数据消失, CN-
References: an external Aspen Properties (.APRPDF) or Aspen Plus (.APPDF) file?选项来进行相应的连接操作，以解决自定义组分数据丢失的问题。
用户需要进行以下步骤
... |
Problem Statement: What kind of data can Aspen Search access and processed? | Solution: Aspen Search is able to detect and extract metadata from the following file types:
Filetype
Name
bkp
Aspen Plus
apw
Aspen Plus
hsc
Aspen HYSYS
doc
MS Word (2003)
docx
MS Word (2007+)
xls
MS Excel (2003)
xlsx
MS Excel (2007+)
xlsm
MS Excel (macros, e.g., Aspen Simulation Workbook files)
Note: ASW files are t... |
Problem Statement: Where do I find the documentation which includes information about Lag Analysis in Collaborative Demand Manager (CDM) | Solution: When you installed CDM, you should have CAPHelp located here C:\Program Files\AspenTech\Aspen CAPs\CAPHelp\DM_Help\USEnglish
Keywords: None
References: None |
Problem Statement: Is there a way to bring B-jac (*.bjt) files into Tasc+? | Solution: When one opens a B-jac (.bjt) file in Tasc+ version 2004.2, an error will occur stating a Hetran license does not exist. However, the HTFS+ User Interface will continue to open.
As long as Results exist in the bjt file, the user can then click on Run - Transfer - Tasc+. The user can then switch to the Tasc+ a... |
Problem Statement: Aspen EDR does not accept the user input for Nozzle ID/OD under Geometry/Nozzle/Shell. | Solution: EDR does not allow geometry changes when the tube layout in Geometry Summary is in Use Existing Layout option.
To change the geometry, the tube layout is set to default as New Optimum Layout.
Keywords: Nozzle ID, thickness, tube layout.
References: None |
Problem Statement: Once a user adds a new analysis with a new date and saves the model, the old analysis is dropped from the list and cannot be selected again. How does feedstock analysis date works in AOS? | Solution: Any analysis data has a time stamp. AOS uses the available analysis fit for the model period. User can only see the 'active' analysis data from the screen. If delete the current active analysis, the nearest old analysis will be used as current active analysis. Any newly added analysis after the active analysi... |
Problem Statement: An element that has been marked as inactive in Demand Manager is still showing original history and working forecast data. | Solution: An override has put historical data back onto one of the attributes of the inactive element.
When an element has become inactive via the re-alignment process, the original history of the element is moved to the re-aligned element.
There is no need to do overrides to remove the history, the re-alignment proces... |
Problem Statement: What is the deresonating baffle? | Solution: A deresonating baffle is a type of baffles that is used avoid acoustic vibration problems.
When a heat exchanger has a flow-induced vibration problem, some corrective actions are available to reduce or eliminate the problem. First, verify that the vibration arises from shell-side flow, not from some other ext... |
Problem Statement: How to model electric heaters using Aspen Exchanger Design and Rating tool | Solution: Electric Heater has electric wires inside the tubes providing heating to the process fluid on the shellside. In Aspen Exchanger Design and Rating (EDR), users cannot directly model the wires. However, we can use the following workflow to model electric heaters
When the Shell & Tube Heat Exchanger in EDR is us... |
Problem Statement: What is the easiest way to get Aspen Plus data into Acol+, Aerotran, Hetran, Plate+, TASC, and Tasc+? | Solution: Here are the steps to follow:
1 - In Aspen Plus the Aspen Plus flowsheet, it is best to use a HeatX block. The HeatX block is preferable even over the Hetran and Aerotran blocks
2 - It is good practice to solve the HeatX block once in the Shortcut mode (see the shortcut radio button in the below figure). This... |
Problem Statement: Why does TASC+ no longer appear available after installing the Teams 2006 update? | Solution: The early release of Aspen Engineering Suite 2006 was only targeted toward specific Teams and Icarus Users. For this reason when HTFS+ 2006 is installed, the only product that will show up in the menu is Teams (i.e. TASC+ and all the other products will not be available for the early release.
For those cust... |
Problem Statement: If multiple shells in series and parallel are simulated, are the reported pressure drops for one exchanger or for all of the exchangers combined? | Solution: The pressure drops are total pressure drops of all the exchangers in series (per parallel path).
For example, if you have a total of 6 exchangers; 3 shells in series in 2 parallel trains (that means 3 exchangers in each parallel path), then the pressure drops (shell side pressure drop and tube side pressure d... |
Problem Statement: Customer has AspenONE EDR V7.1 installed. APED is configured and ready to be used. Customer starts EDR V7.1 and attempts to fetch properties data from Aspen Properties data bases. He gets the following error:
Failed to create Aspen Properties Object, please install Aspen Properties from Aspen One DVD... | Solution: Run Aspen Properties Registry Fix Utility from:
Start\Programs\AspenTech\Process Modeling V7.1\Aspen Properties and Select Aspen Properties 23.0
Keywords: EDR
Object
Properties
References: None |
Problem Statement: Why am I unable to enter the number of baffles for K and X shells? | Solution: In Aspen Shell &Tube Exchanger, K and X shells are considered to be unbaffled units and so do not allow baffles to be entered.
By default - Input | Exchanger Geometry | Geometry Summary is set to be unbaffled� and all other parameters for baffles are greyed out.
In order to prevent vibration, the workarou... |
Problem Statement: This knowledge base article outlines how a user can schedule different synchronization operations within the Aspen Reporting Framework GUI so that the tasks will run automatically at the scheduled time. | Solution: Aspen Reporting Framework has ability to allow the users to schedule all the synchronization operations (Master Data Sync, Process Data Model and Process Cube) that are in the Schedule Operations tab within the Aspen Reporting Framework GUI. Note that by default there will not be any schedules attached to the... |
Problem Statement: Where is the feature Symmetry 1 and Symmetry 2 from TASC in Aspen Shell & Tube Exchanger V8.8.2? | Solution: The Symmetry 1 and Symmetry 2 options from TASC has been replaced by Tube in reference location in the grid in Exchanger Geometry | Bundle Layout | Pass details tab.
If the user selects ‘Yes’, Symmetry 1 results are obtained. If ‘No’ is selected, Symmetry 2 results are obtained. These two options have the fol... |
Problem Statement: When I model a Shell & Tube Exchanger case either in Aspen HYSYS and export it to Aspen Shell & Tube exchanger, or I model the heat exchanger in the standalone program setting the vaporizer type as Flooded evaporator or kettle; the heat exchanger does not solve and the error message Input Error 1124... | Solution: For Kettle Vaporizer type the allocation of the Hot Fluid has to be on the tube side. To resolve the error message, switch the streams so that the hot stream is on the tube side.
Keywords: Input Error 1124, Hot fluid allocation, Shell & Tube Exchanger, Flooded evaporator or kettle
References: None |
Problem Statement: Within the Aspen EDR programs, it is possible for users to create their own chemical properties databank for those fluids that are not found in any of the EDR databanks (B-JAC Databank, COM-Thermo or Aspen Properties).
The private databank can accommodate up to 400 different fluids, where details on ... | Solution: The databank is contained in three files;
D_IDPriv
D_FxPriv
D_VaPriv
These files will normally be in the folder where the program has been installed, e.g. 'C:\Program Files\AspenTech\Aspen Exchanger Design and Rating V7.2\Dat\PDA' and can be copied across.
However, the files could be located in a different ... |
Problem Statement: In Aspen Shell & Tube Exchanger, on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab the program reports ''Shell Entrance Flow Area'' and ''Shell Exit Flow Area'' values in the Rho*V2 analysis section. How are they calculated? | Solution: Shell entrance and exit flow area values are output on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab. They are calculated according to the methods given by TEMA. From TEMA 9th Edition (2007), the flow area calculations are described in details in Section 10 ''RGP-RCB-4.62 SHELL OR ... |
Problem Statement: As described in | Solution: 121775, users can transfer a heat exchanger case between Aspen Shell & Tube Exchanger and Aspen Shell & Tube Mechanical, by going to Run | Transfer, and selecting the desired program name.
However, this behavior will cause Aspen Shell & Tube Exchanger and Aspen Shell & Tube Mechanical programs to be opened ... |
Problem Statement: What is the fouling calculation option? How it is considered in maximum fouling calculations? | Solution: The fouling calculation option determines how the program will determine the maximum fouling on each side.
Program will default to the actual hot / cold side ratio.
Fouling calculations determine the exchanger fouling that would lead to a specified duty.
Some shell side or tube side fouling may be initially... |
Problem Statement: Why is a K Shell is not supported in Thermosyphon mode? | Solution: The reason why a K Shell is not supported in Thermosyphon mode is because the Tasc+ thermosyphon option assumes that the vapor and liquid leave from the same nozzle and flow via pipe work to the column. In K-shells it is assumed (in Tasc+) that the vapor and liquid leave via separate nozzles, so the Tasc+ ... |
Problem Statement: How do I add my user to a Aspen Collaborative Demand Manager (DM) Model? | Solution: The following steps can be used. To add a new user (in this case, use your computer login id), update the following tables:
? USERIDS
USERINFO - Access type SAVE
RBTUSERS
RBTURMAP -(Super User: 1)
Afterwards, save the case performing File|Save As and give it another name.
Keywords:
References: ... |
Problem Statement: Properties for hot stream or cold streams can be entered using three different databanks (B-JAC, COMThermo or Aspen Properties). However, if the User Specified option is chosen, when should one enter specific enthalpy? | Solution: Depending upon the phase on each process stream, only certain property information need be supplied. Specific enthalpy is required in the following cases:
1. For single phase fluids, duty (Q) is found by
Q = M Cp DT
In the above equation, M is the mass flowrate (kg/s), Cp is the specific heat capacity... |
Problem Statement: How do you specify the properties for the heat exchanger materials when they are not in the databank? | Solution: When a material is in the Aspen Tasc+ databank, you can click on the TOOLS pull down menu and then click on DATA MAINTENANCE | MATERIAL DATABANK.
When you see the diagram of the heat exchanger, click on the DATABANK pull-down menu and select one of the databases and begin perusing the current materials.
If yo... |
Problem Statement: How can I create Feedstocks in Aspen Olefins Scheduler? | Solution: Below arethe step by step instructions for adding a new feedstock.
Initial requirements:
A.- Configure all feedstocks in the Aspen Furnace Configuration Utility prior to creating a new feedstock in AOS.
B.-Information about the molecular Composition or PIONA analysis for each new feedstock is needed.
... |
Problem Statement: Unable to print TEMA sheets within TASC+ after receiving ERROR 482 and BLABEL1 messages. | Solution: This is usually caused by an internal network problem (i.e. there are disruptions on the network or to the network printer that the TEMA sheets are being printed from). To resolve this issue, ensure that all network disruptions have been reconciled on internal networks before trying to print out TEMA sheets.
... |
Problem Statement: How do I change my language in Collaborative Demand Manager (CDM)? | Solution: The change the CAP language, select Options > Settings and select your favorite language from the Current Language drop down.
Keywords: None
References: None |
Problem Statement: How to I use the interactive tube layout feature to customize tube layouts? | Solution: The steps are as follows (if in Rating/Checking mode then skip to step 3):
1) Run Aspen Tasc+ in design mode to determine the specific heat exchanger geometry for your process.
2) Click on Run - Update file with geometry to automate the transfer of information to the Input - Geometry section to ... |
Problem Statement: How do I get the desired symmetry in Tube Bundle Layout? | Solution: Starting Aspen Shell & Tube Exchanger V7.2, User can get desired Tube Layout symmetry using the new layout options incorporated in Aspen Shell & Tube Exchanger application. Following instructions will guide the user setting up these new tube layout parameters.
1. Go to Input | Exchanger Geometry | Bund... |
Problem Statement: In Aspen EDR programs, there are some features that are designed to assist in users' inputs.
For example, when users finish input on one tab they may want to be navigated to the next tab that requires inputs. They may also want to be reminded by the program that which input sections are completed and... | Solution: There are similar features in Aspen EDR programs.
? The ''Next'' button is for navigating users to the next form that requires inputs. This will help users to go through the various inputs on different tabs step-by-step.
? The ''Go Back'' ''Go Forward'' buttons are for tracking users' view... |
Problem Statement: Consider the case where liquid enters around the periphery of a tube at a constant flow rate with gas flowing upwards in the tube. At low gas flow rates, the liquid falls down the tube in a film and passes out from the bottom of the tube. As the gas flow rate is increased, a condition is reached wh... | Solution: In a vertical thermosiphon reboiler there is the possibility that in the axial outlet nozzle or tube exit, the vapour velocity may not be sufficiently high to lift the liquid out of the reboiler. This phenomenon is related to flooding and flow reversal in two-phase flow.
From Results > Thermal / Hydraulic Su... |
Problem Statement: When in ?Rating / Checking? or ?Simulation? mode under Input | Problem Definitions | Application Options | Application Options tab, the Pass Details can be set under Input | Exchanger Geometry | Bundle Layout | Pass Details tab. From this input form, details can be entered specifying the number of ro... | Solution: explains how to activate the form.Solution
From the Input | Exchanger Geometry | Geometry Summary | Geometry tab, for the Tube Layout there are a number of options to specify the location of the tubes in the bundle;
New (optimum) Layout: A set of internal rules is always used in Design mode, where exchanger g... |
Problem Statement: How do I export a TEMA sheet to Excel? Sometimes I have problems running the default template when I export. | Solution: To export a TEMA sheet to Microsoft Excel:
1. Go to File/Export to/To excel using the specified template
2. When it specifies what template to use, select
AspenTech\Aspen HTFS+ 2004.2\Dat\Template\Tasc+TEMAsheet.xlt.
If that template does not work, create a blank excel sheet and reference that fi... |
Problem Statement: The effective tube length is the length for heat transfer. In fixed tubesheet arrangements, the effective length is the tube length minus the tubesheet thicknesses and projections beyond the tubesheet as can be entered from Input > Exchanger Geometry > Shell/Heads/Flanges/Tubesheets > Tubesheets tab... | Solution: explains other geometry items that should be considered with a K or X- shell. Solution
In an X-shell, the shellside inlet flow (if condensing) normally enters at the top of the shell and is distributed along the tube length to then flow diametrically across the bundle to then be removed at the bottom of the s... |
Problem Statement: The customer has a mixed phase (vapor & liquid), multi-component (wide boiling) hot stream he wants to condense. He wants to enter the vapor phase composition and the liquid phase composition of the hot fluid. Hetran will allow him to enter composition for both phases only when he uses the narrow ran... | Solution: Yes, this is by design. The user has two additional options: Multi-component - curve specified by the user where he can do the same thing or Multi-component - curve calculated by program where the program based on the VLE calculations will determine the quality.
Keywords: Hetran, Tasc+, multi-component
Refere... |
Problem Statement: Can I design a spiral heat exchanger in Aspen TASC or Tasc+? | Solution: Aspen TASC, Tasc+, or Hetran can not design or rate spiral heat exchangers.
Keywords: Spiral Heat Exchanger.
References: None |
Problem Statement: Is it feasible to design electrically heated exchangers using Aspen Shell & Tube Exchanger? | Solution: Aspen Shell&Tube can indeed be used to design electrically heated ''shell and tube'' heat exchangers although the process is a little complicated and it does have some limitations. Advice about this procedure is given below.
? Electrically heated units differ from traditional units in that they hav... |
Problem Statement: How is the turbulent buffeting frequency calculated? | Solution: The turbulent buffeting frequency equation used by Aspen Shell & Tube Exchanger is the same used in the TEMA (Tubular Exchanger Manufacturers Association) standard and HTFS:
where:
do -= outside diameter tubes (inches)
xl = Pl / do
xt = Pt / do
Pl = longitudinal pitch (inches)
Pt = transverse pitch (inches)... |
Problem Statement: What does Longitudinal fin cut and twist length refer to? | Solution: The tube has cuts through the fin channels circumstantially at specified intervals along the tube length. The fins are then bent (or twisted) on one side of each cut, creating a discontinuity that promotes turbulent fluid flow, thereby enhancing heat transfer efficiency.
The Longitudinal fin cut and twist len... |
Problem Statement: How do I resolve error message Improper Aspen Properties Specifications? | Solution: This message appears when you run the EDR program with Aspen Properties selected as the physical property package on the Hot/Cold Stream Compositions datasheet while no component has been selected.
To resolve the issue, you have to add the components by clicking on the Search Databank... at the lower left cor... |
Problem Statement: How do you select Stainless 2205 tubes in Materials of Construction? | Solution: Exchanger Design & Rating has alloy 2205, but listed name in database is not an ASME name. You can find this material if you go to Construction Specifications | Materials of Construction | click on Databank Search | Advanced tab | on SEARCH select ‘'Alloy Design/UNS No, and on LIKE select S32205 (there will... |
Problem Statement: The PROPS program in Aspen HTFS+ is not returning results for pure components or mixtures. | Solution: Make sure during installation that Aspen HTFS+ sub-features are installed. Failure to install all sub-features will result in the features appearing to be available and active, but they will not run.
Keywords: Props, results, missing
References: None |
Problem Statement: Due to some problems in the installation procedure of the early version of HTFS+, some HTFS+ DLLs can not be unregistered or re-registered (after being updated by a patch for example).
As a result:
HTFS+ might not run normally
HTFS+ Data Browser can not be opened from Aspen Plus in a HEATX block
An H... | Solution: Change permissions in Windows registry to \HKEY_CLASSES_ROOT\TypeLib:
1. Log on the machine as a local administrator.
2. Open the windows registry (if you do not know how to do it, you should not be trying to address this problem yourself, ask your IT to do it for you).
3. go to \HKEY_CLASSE... |
Problem Statement: What is Tasc+? | Solution: Tasc+ combines Aspen HTFS with Aspen B-JAC. Click on this link to find out more: Tasc+ Overview.
Keywords: TASC; Shell & Tube; Heat Exchange; Design; Rating
References: None |
Problem Statement: I am getting Operation Warning 1336, saying that I might have a poor heat transfer since the crossflow fraction on the shellside is less than 30%, how can I troubleshoot this? | Solution: Cross and Window flow contribute to the heat transfer in a heat exchanger and where there is a leakage, the cross flow fraction decreases. The program will give a warning message if the cross flow decreased to less than 30% at any point of a heat exchanger indicating that this issue is one of the causes that ... |
Problem Statement: I am trying to change the input information in my Aspen Tasc+ simulation. Why am I not able to change the Shell Type, Shell Diameter, Number of Tube Passes, etc.? | Solution: If you cannot change certain items like Shell Type, Shell Diameter, Number of Tube Passes etc, check the item Tube Layout on the Input > Exchanger Geometry > Geometry Summary > Geometry tab to see if it is set to Use existing layout. If it is, and you need to change any of these values, change the item to Cre... |
Problem Statement: Is it possible to specify variable number of tubes per pass? | Solution: Starting with Aspen Shell & Tube exchanger V7.2, it is now possible to specify and evaluate the variable number of tubes per pass.
The Pass Details facility can be used either to exactly match an existing layout or explicitly to specify a bundle with different numbers of tubes in each tube side pass. Heat tra... |
Problem Statement: Different nozzle types can be set in Input | Exchanger Geometry | Nozzles | Shell Side Nozzles for the ?Nozzle / Impingement type?. Here dome or impingement plates maybe set that protect the tubes directly under the inlet nozzle from damage due to vibration or erosion.
For a dome nozzle the piping ... | Solution: If the nozzle and dome size have not been entered by the user, then the method to determine the sizes is as shown below.
Dome
The dome diameter is based upon the smaller of twice the nozzle diameter or the mean of the nozzle diameter and the shell diameter, i.e., ?* ( nozzle diameter + shell diameter).
... |
Problem Statement: In the Design modes of Aspen Shell and Tube Exchanger, some basic geometry can be selected together with the duty requirements and the pressure drop constraints for the shell and tube side. The program then will look at various geometries that will meet the area requirement (duty) and the pressure dr... | Solution: explains why this may occur.Solution
British / US standard pipe sizes range from 6, 8, 10, 12, 14, 16, 18 and 24 in nominal bore (152, 203, 254, 305, 356, 406, 508 and 610mm) for the shell diameter.
From the standards of the Tubular Exchangers Manufacturers Association (TEMA) standard tube lengths are 8, 10, ... |
Problem Statement: How do I install Aspen Tasc+? | Solution: With the release of aspenONE, you will have received a set of DVDs. Discs 1 to 6 are the product installation DVDs organized according to product family. Aspen Tasc+ is installed as part of the Aspen Engineering Suite (AES) set of products and can be found on DVD number 6.
Installing using the AspenTech Ins... |
Problem Statement: Where can I find the crash log file if Aspen Exchanger Design & Rating is crashing? | Solution: When EDR crashes, it generates log files. You can find this file at following location
C:\Users\[username]\AppData\Local\AspenTech\AspenEDR vX.X
You may need to enable hidden folders on your computer to navigate there:
1. Open control panel
2. Click on appearance and personalization
3. Click on folder optio... |
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