question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Is the calculated Mach number based on mass (design) flow or rated flow? | Solution: Aspen Flare System Analyzer calculates the Mach number of all pipes based on the specified mass (design) flow.
However, if the user decides to use the relief valve’s rated flow for tailpipes, the Mach number for the pipes specified as tailpipes will be calculated based on rated flow.
ThisSolution illustrate... |
Problem Statement: How to minimize breaking links between ASW workbook and (Aspen Plus, Aspen HYSYS or Aspen EDR) model variables?
Root Cause:
The links between ASW workbook and simulation model variables can be broken in many ways. The best practices followed by root cause explanation show in “ | Solution: ” section.
Solution
1) Do not edit a simulation while developing the ASW interface.
- Problems may occur if you change the paths or delete variables that are linked in ASW, and in turn, this may cause ASW links to stop working.
2) Never save a simulation with a new name while it is open in Aspen Simulation W... |
Problem Statement: If closed by accident, how do I re-display the Model Palette in Aspen Plus? | Solution: In Aspen Plus, there are two methods to turn the Model Palette on and off:
The hotkey (shortcut) method: Press the F10 key to toggle the Model Palette
The manual method:
In the Simulation Environment
Click the View tab in the Ribbon and then click the Model Palette button
You may hover the mouse pointer o... |
Problem Statement: APC controller with direct OPC connection can not write to certain DCS tags while CIMIO for OPC can. The observed error status is failure with E_BADTYPE | Solution: For certain OPC server, a Write from a client has to match data type of the DCS point before the written value is accepted. A mismatch data type will result in a write failure with an error status E_BADTYPE. Reading the same tag returns the valid value with no error status.
CIMIO for OPC is an OPC client b... |
Problem Statement: This knowledge base article shows you how to install the Microsoft .Net Framework 4.x download, which is located on the aspenONE Media. | Solution: .NET Framework can be obtained from the version of the aspenONE media that you are trying to install, located in the 3rd Party Redistributables folder:
NOTE: Your version of aspenONE may have different .NET Framework versions. Below is an example of aspenONE V11.
To install .NET Framework:
Make sure you ope... |
Problem Statement: Does the FCC unit calculate the carbon content in the produced coke? | Solution: You can find the hydrogen content in Advanced/ Results/Coke Distribution. You could safely assume that the rest is carbon content in coke.
Key Words
FCC
Coke
Carbon content
Keywords: None
References: None |
Problem Statement: After a new installation of the Aspen MES Web Server, the aspenONE Process Explorer home URL displays a blank page on all browsers.
This article the possible cause and re | Solution: to this behavior. Solution
Access the IIS homepage on the Web Server with the following URL:
http://localhost/iisstart.htm
If the above URL also returns a blank page, most likely the Static Content feature was not installed on the Web Server while installing IIS.
To enable Static Content on Windows Server ... |
Problem Statement: Are the parameters generated by SR-POLAR available? | Solution: For polar components (dipole moment >> 0), if you do not enter the SR-POLAR scalar parameter RKUPP0, the system estimates RKUPP0, RKUPP1 and RKUPP2 from vapor pressures using the Antoine vapor pressure model.
If you do not enter at least one of the SR-POLAR binary parameters RKUKA0, RKUKA2, RKULA0, RKULA2, o... |
Problem Statement: Does Acid Gas -Chemical Solvents property method support Amine Blends in Aspen HYSYS? | Solution: The Acid Gas - Chemical Solvents property package supports the following amines and amine blends in Aspen HYSYS V9.0.
In Aspen HYSYS V10.0, the following amine blends are supported.
Keywords: Acid Gas - Chemical Solvents, Amine Blends
References: None |
Problem Statement: When using RadFrac user can specify efficiency in Column| Specification| Efficiency folder and when using specific packing type HETP can be included. HETP can be also considered as efficiency factor. How Aspen Plus perform the calculations when both Efficiency and HETP are specified in column inputs? | Solution: For an equilibrium based column, the efficiencies are used for the concentration calculations. Then, the HETP is used in the sizing or rating of the column. Both types of specifications are considered in the output results.
To check difference in a specific column, one can create two columns with almost the s... |
Problem Statement: This knowledge base article provides an example Aspen SQLplus script which calls the Aspen Framework Application Programming Interface (API) to retrieve a list of Aspen Security roles and role members. | Solution: Before you can run this example you must:
1. Include a reference in Aspen SQLplus using View |
Keywords: None
References: s to the libraries 'PFWSecurityAPI 1.0 Type Library' and 'AuthWrapperSvc 1.0 Type Library' as shown on the screen grab below:
2. In the example query below, change the line objSe... |
Problem Statement: For rate based columns, the temperature reported under Performance Tab - Column Profiles Page is not consistent with the Worksheet Tab reported values for overhead vapor stream. Why? | Solution: The reason why there might be an inconsistency is that the temperature reported on Performance Tab - Column Profiles Page is the stage liquid phase temperature. The vapor phase temperature that is reported on the Worksheet tab is slightly different because the stage phase does not have to be in equilibrium f... |
Problem Statement: Does the Fired Heater in Hysys model the conversion of H2S to SO2? | Solution: The Fired Heater in Hysys is not designed to model the conversion of H2S to SO2. In V9.0 we have the Sulfur Recovery Unit Operations integrated into Hysys and this should be used to model the conversion process.
Key Words:
H2S Recovery, SRU, Fired Heater
Keywords: None
References: None |
Problem Statement: When I try to add one of the built in columns an error message like: This template case .... does not exist or is unreadable appears - Why am I seeing this and what should I check? | Solution: The error message indicates that Aspen HYSYS could not locate or read source files of the built-in columns (referred to as “Template Case”). This issue could be caused by missing source files or incorrect template file path specification.
It is more likely that template file path was incorrectly specified. T... |
Problem Statement: What are the options to export drawings from EDR Mechanical to external software? | Solution: Our Inventor interface creates a 3D model that can be exported to AutoCAD. This model is 100% scalable as the user would expect since it is 100% created in Autodesk 3D modelling tool (Inventor). The negatives are that the model is not complete (we do not have all flange types for example) but the major parts... |
Problem Statement: How can I simulate inorganic materials in Aspen HYSYS? | Solution: You can add inorganic material from Aspen Properties database. But for your information, Hysys can model solid handling to limited extent. HYSYS is basically a VLE (Vapor liquid equilibrium) simulator.
HYSYS doesn't account for solid-liquid-vapor equilibrium. Their vapor pressure information is by defaults se... |
Problem Statement: Why HYSYS reports the current value of reflux ratio even if the column does not have a condenser? | Solution: If the column does not have a condenser, the current value of reflux ratio in column specifications is reported for the 1st stage of the column. You can double click the reflux ratio in the specifications and check it.
The definition of reflux ratio is the molar flow of liquid leaving a stage, divided by the... |
Problem Statement: What is the difference between the Gradients reported in Aspen HYSYS Pipe Segment? | Solution: The Gradients reported under the Performance | Profiles section of a Pipe segment represent Pressure drop due to different effects.
Each gradient reports the pressure loss per unit length [Pressure Drop/ Distance] for different reasons:
Friction Gradient: Pressure loss per unit length due to friction.
Static ... |
Problem Statement: How can I switch among HYSYS cases? | Solution: Whenever users have two or more HYSYS cases open, it will be possible to switch among cases by going to File | Activate.
The image below illustrates the case in which three HYSYS cases are open. The active case is the one shown on the upper-central part of the HYSYS window (‘ClausProcess.hsc’ in this example)... |
Problem Statement: For more details about concept of application snanpshot and histroy dataset has been describes in KB article ID 38557. Please refer through below link:
https://esupport.aspentech.com/S_Article?id=000038557
The purpose of this article is to describe steps to retrieve application snpashot & history, us... | Solution: Assumptions – An online application is already deployed through DMC3 builder.
From the Online menu, access the “Configure Server” option to confirm the history retention configuration. This action will open the Configure Online Server program. You should the following dialog:
To get the snapshot for a deploy... |
Problem Statement: Can polymer reaction kinetics can be modified in Aspen Plus Dynamics? | Solution: By default, most of the polymer kinetics models (except Free radical and Ziegler Natta) are closed form. So, the reaction parameters are not available for modification during dynamic run, estimation and optimization. In closed form, the rate of reaction is calculated by a procedure that uses same reaction sub... |
Problem Statement: How to use Table CASE with a global model | Solution: Table CASE in a MPIMS Model will allow user to run stacked cases, make local model case modifications and update any global model tables.
To access local model:
a. Use MODEL Keyword in Global Case Table as follows:
Enter the keyword MODEL in the column below the case identifier, but above the keyword TABLE.... |
Problem Statement: Why is BLOWDOWN stopping calculations before reaching the Pressure Halt Condition? | Solution: BLOWDOWN solver checks if the next time step will go below the Pressure Halt Condition; if it does, then it will stop the solver, this is to avoid potential negative pressures or other instabilities at low pressures.
Usually pressure does not change much at the end of the blowdown, so solver will stop at the ... |
Problem Statement: Why am I unable to get results for ISENEXMX in property analysis? | Solution: ISENEXMX is the isentropic exponent of the mixture. When you define this property set, please request ISENEXM for liquid or vapor phase under Qualifiers..
It does not make sense to report ISENEXMX for a total phase when there are two or three phases present, just like viscosity. After defining the phase, you... |
Problem Statement: Infoplus.21 administrators add users to roles via the AFW manager. This can be quite tedious unless those users are already grouped under an active directory group. One way is to use SQLplus to extract the users and their role from a flat file or text file and add the users to their respective roles.... | Solution: You do this by calling a COM object from within SQLplus query writer using the CreateObject function. Use this CreateObject function to call AspenTech.AFW.PFWSecAPI. This will expose the function you require - AddMembersToRole. This function allows you to add a user to a particular role.
An example SQLscript ... |
Problem Statement: How can the Event/Gantt screens in APS model be grouped? | Solution: In APS, Grouping of the Event/Gantt screens can only be done at the Database level using the Database Tables, at the moment there is no way available to group the Event/Gantt screens using the APS User Interface or at Application Level.
In order to group the Flowsheet screens at the Database level, we must m... |
Problem Statement: How to make the Small Trends/Trend Thumbnails visible in APS Interface? | Solution: A Trend screen graphically depicts the following information:
- Minimum bounds
- Maximum bounds
- Points at which bounds have not been maintained.
This area of the screen contains the charting of tank or stream properties. Moving the cursor over a trend line displays a tool-tip that shows the time correspondi... |
Problem Statement: When modeling two compressors in parallel, I seem to lose a degree of freedom, why is that? | Solution: If the compressor discharge streams of both compressors are directly connected to a mixer, you loose a degree of freedom. This is because the mixer might have Equalize All option enabled for stream pressures, so only one discharge pressure is needed to set the discharge pressure of the other train. If you ad... |
Problem Statement: How do I open and view a TRANCOL file from a PIMS-AO execution using the AO Marginal Analysis Viewer? | Solution: V10 now allows generation of TRANCOL reports for PIMS-AO executions. These reports can be viewed with the new AO Marginal Analysis Viewer. First create the report using the “Create XLPTC File” option in MODEL SETTINGS | Reporting | Outputs tab.
This will create a file called tr000xxx.xlptc where xxx is the ... |
Problem Statement: When user is running an Aspen Plus simulation file, he may get an error as below.
LYNGBY MODIFIED UNIFAC MODEL: GMUFLBY HAS MISSING PARAMETERS:
UNIFAC GROUP STRUCTURAL INFORMATION PARAMETER, UFGRPL(DATA SET 1),
MISSING FOR COMPONENT PROPA-01; NO UFGRPL PARAMETERS SUPPLIED BY USER;
DEFAULTS NOT FOU... | Solution: The RKSMHV2 property method is based on the Redlich-Kwong-Soave MHV2 equation-of-state model, which is an extension of the Redlich-Kwong-Soave equation of state. The Lyngby modified UNIFAC model is used to calculate excess Gibbs energy for the MHV2 mixing rules.
The parameter UFGRPL stores the modified UNIFAC... |
Problem Statement: When you want to update the simulation model file location or link another file (including renamed file), how to accurately do it without breaking the links between ASW workbook and simulation model variables?
Root Cause:
Wrong procedures can break the links, for example: add the new file to the Org... | Solution: The accurate way to update the simulation model file location or link another file (including renamed file) is using “Change case link” button showed in figure 2.
Figure 2. “Change case link” button for renaming or switching simulation model file.
When the “Change case link” is grey in Organizer | Configura... |
Problem Statement: Why does Viscosity shows <empty> when I use the OLI Electrolyte package? | Solution: Different from the normal workflow followed in Aspen HYSYS, when using the OLI Electrolyte package, some mayor results will not be displayed under the Properties summary of a stream:
The reason for this is that the stream properties will not be calculated by the normal HYSYS engine, but by the OLI engine i... |
Problem Statement: How to find the vapor pressure value in Aspen HYSYS? | Solution: You can locate the true vapor pressure value in stream / properties. Click Append new correlation (the green cross in the bottom), in the correlation picker dialogue, under Standard, Apply True VP at 37.8 C.
Keywords: Vapor pressure, Aspen HYSYS
References: None |
Problem Statement: How is resident time defined in case of different liquid and vapor velocities in a RPLUG reactor? | Solution: The residence time is always the same, irrespective of the liquid hold up calculated (liquid is assumed to be the reactive phase).
The residence time definition is the next: Volume of the reactor / Volumetric flowrate.
This calculation does not consider the liquid hold-up.
“No-slip” condition is assumed when ... |
Problem Statement: Through the | Solution: articles (KB 000038262: Jump Start Guide to Activated Exchanger Design & Rating in Aspen Plus V8.4; KB 000038240: How to rigorously model a kettle reboiler in Aspen Plus), user knows the workflow of convert shortcut calculation to rigorous modeling of heat exchanger through activated Exchanger Design & Rating... |
Problem Statement: Why does the Aspen HYSYS Depressuring utility calculate negative flowrate and show severe temperature fluctuations? | Solution: The possible reason is that the recycle efficiency selected was not realistic. Providing 1% as the recycle efficiency gives a more realistic answer than 100% in all instances for multicomponent systems. Reduction of the Recycle Efficiency prevents phases from instantaneously reaching equilibrium and allows fo... |
Problem Statement: When running the model with AO, Error below appears.
Error E074. Group Tag INF in Table GROUPS Matches an Existing Stream or Utility Tag | Solution: The specific tag INF is used to build some infeasibility structures for AO. DR don't use this tag.
As a workaround, please replace the different tag name instead of INF.
The fix of this problem is included in V9.0 or later.
Keywords: PIMS AO
INF
E074
References: None |
Problem Statement: What is different about the horizontal and vertical orientations of the vessel in the Depressuring Utility and how does the model take the orientation into account? | Solution: The main differences are in the geometry of the vessel. If there is liquid in the vessel, the following things will be affected:
1. Wetted Area. This will have a major effect on heat input to the vessel when the API Fire method is used.
2. Area of vapor-liquid interface. This should not have that much of an... |
Problem Statement: How do I setup Aspen Calc event driven calculations? | Solution: An Aspen InfoPlus.21 external task is used to drive calculations when a change is detected in an Aspen InfoPlus.21 database. Here are the steps to set up an event-driven calculation:
Start Aspen InfoPlus.21.
Run the batch file EventCalc.bat to load AspenCalc.rld. That file is located under the AspenTech\Aspen... |
Problem Statement: When installing EIU or other excel Add-in the next error is prompted:
The following | Solution: cannot be loaded beacuse Microsoft support for the .Net framework 4.0 is not installedSolution
In some rare occasions the Visual Studio tools for Office are not installed within the .NET framework. You can download the tools in the next link:
Please see the links below for installing .NET 4
https://msdn.micr... |
Problem Statement: Is there any easy way to get mass density of pure component from Aspen Plus? | Solution: In Aspen Plus, Pure component property analysis feature can be used to generate tables and plots of pure component properties as a function of temperature and pressure.
The detailed mass density of pure component property analysis procedure is listed below and demonstrated in figure 1:
1) Click the ‘Pure’ an... |
Problem Statement: Is there any way to turn on and off PIMS-AO with visual basic command? | Solution: There is no direct call to turn AO on and off, however, we could use the below command.
To turn it on, the user need to set two integer settings (after opening the model):
go_PimsWin.SetIntegerSetting(UseXslpOn, 1);
go_PimsWin.SetIntegerSetting(UseXnlpMGOn, 1);
Then close and reopen the model to ... |
Problem Statement: How to use 'Publish Plan' in PIMS | Solution: This KB article will take Volume Sample model as an example to show you the procedure to Publish Plan in PIMS.
1. Launch Windows Service Access by going to the location C:\Program Files (x86)\AspenTech\AspenEIF\SDK\bin, then click on Windows Service Access.
2. Choose Subscribe radio button, and enter topic 'R... |
Problem Statement: Sometimes the historian files get corrupted, this can be due to many reasons including power failure. In general, customers will notice that although they can start the database without indication of a problem, when they try to view the data using Aspen Process Explorer or Aspen SQLplus they will get... | Solution: Open the Aspen InfoPlus.21 Manager and start the database
Click in Actions>Repair Archive
Select the repository containing archive file sets to be repaired
Click Next
Select the archive file sets to be repaired - for each file set decide whether to allow extension of the end time - see How should I answer the... |
Problem Statement: What is the use of table _ZBIASRESULTS in APS? | Solution: If the PUB_BIAS_RESULTS keyword is set to 'Y' in the CONFIG table, period bias results are published to the _ZBIASRESULTS table. Previously bias results were published to the _BIASRESULTS table.
1. Add a keyword PUB_BIAS_RESULTS in CONFIG table, and set it as Y;
2. Set scheduled bias for any stream property... |
Problem Statement: Can I still open the Classic Flowsheets in PIMS V10? | Solution: Classic flowsheets are simple block flow diagrams of PIMS results that have always been available with PIMS. Although more modern options are currently available, the classic flowsheets are still available in Aspen PIMS V10 as well.
As mentioned previously, classic Flowsheets are very basic yet they can be... |
Problem Statement: Is there any way to allow me install PIMS patch silently? | Solution: Yes, we could silently install PIMS patch on the machine.
Eg, we want to install CP1 silently for PIMS V10. Please refer the steps as below.
1. Open CMD and run with administrator.
2. Please refer following command to install the patch.
The first command should point to the patch location.
Then using the 2n... |
Problem Statement: How to do model comparison on matrix level in PIMS | Solution: To do model comparison on matrix level, there are two tools we can use in PIMS:
1. Matrix Comparison Function:
PIMS provides matrix comparison function under Run menu. By selecting the matrix files from model folder, PIMS will create a report to include all the differences between two matrices.
2.Solution Br... |
Problem Statement: How can I add Annotations to a Plot in A1PE? | Solution: To add annotations to a plot:
Click the New (“+”) icon under Notes in the Annotation Panel and then click the Annotation icon. The annotation is added to the center of the plot, where you can move it as desired as shown in the below screenshot.
-Or-
Position your mouse cursor at the desired location in the ... |
Problem Statement: How do I customize stream properties for all my streams in a HYSYS case? | Solution: To customize the stream properties for all the streams in your case, follow the steps outlined below:
Start HYSYS. Go to File | Options | Simulation and uncheck the last two checkboxes under Stream Property Correlations group (Activate correlations for standard, Black Oil and Electrolytes and Confirm Before A... |
Problem Statement: How to place an Annotation over a range of time in A1PE? | Solution: To place an Annotation over a range of time:
After adding an annotation, click and hold the Annotation flag. A Prime annotation that marks the end of a time range of interest is created as shown below.
Drag the Prime annotation flag to some point after the beginning annotation.
If the “Prime” annotation i... |
Problem Statement: What is the definition of stable/unstable node and saddle in Azeotrope Search? | Solution: When talking about Residue Curves, pure components and azeotropic points are called nodes. Three different types are possible:
Stable node: This is the pure component or the azeotropic point with the highest boiling temperature and lowest vapor pressure in a distillation region. All residue curves end at stab... |
Problem Statement: Although I give a limit of maximum pressure drop through the shell/tube side, EDR still calculates a | Solution: with a larger pressure drop. Why EDR ignores my input in allowable pressure drop?
Solution
EDR allows the use to input an allowable pressure drop for shell side and tube side under Input – Problem Definition – Process Data.
However, the allowable pressure drop is only going to work when you’re running the de... |
Problem Statement: Is it ok to install 3rd party views on our Aspen MBO database? | Solution: The publish tables are open interface tables to allow users to read the data for reporting/interface purposes only. There should not be a problem if the 3rd party views are neither writing data to the publishing tables nor touching the core tables.
Adding views that only read data from above mentioned tables... |
Problem Statement: How to move and remove Annotations in A1PE? | Solution: 1. To move an annotation:
On the plot, click and drag the annotation to the desired location.
2. To remove an annotation:
a. On the plot, drag it to the right, off the plot
b. Or highlight it in the Notes pane and click the Delete icon as shown below.
Keywords: Annotations
A1PE
References:... |
Problem Statement: Why can’t I use Activated Economics in Aspen HYSYS or Aspen Plus? | Solution: In some instances, Activated Economics in Aspen HYSYS or Aspen Plus will be completely disabled, which usually means that all the options in the Economics ribbon will be completely greyed out. This includes being unable to turn on the Economics analysis and being unable to use the Send to APEA button.
This h... |
Problem Statement: It has been observed that the Aspen Process Data Service keeps re-appearing in the Configured Services list for a data source in the ADSA, even after it had been removed. When it is present, it causes Aspen Process Data Add-ins to fail. How can it be prevented from sneaking back in when no one is loo... | Solution: Functionality of the Aspen Process Data Service in the ADSA is dependent on a Windows service by the same name.
If you do not want the Aspen Process Data Service to re-appear in the Configured Services list for a particular data source in the ADSA, please change the Startup Type option in the Windows Services... |
Problem Statement: How to customize the stream line color in HYSYS flowsheet based on stream type? For example, feed stream: light blue, normal stream: dark blue (default), steam: light green, product stream: dark green, waste water: pink, waste gas: brown, etc.
Root Cause
HYSYS provides several built-in Process Flow ... | Solution: First of all, user should create a user variable (name: stream color), assign different user variable values to different streams for distinguishing the types of streams. For example, empty: normal stream, 1: feed stream, 2: steam, 3: product stream, 4: waste gas, 5: waste water. (Please refer to theSolution ... |
Problem Statement: Why is the water Latent Heat of Vaporization calculated by HYSYS sometimes different from the values in the Steam Tables? | Solution: To evaluate and/or report the Latent Heat of Vaporization of a pure water system in HYSYS, we generally recommend using one of the Steam Table property packages, particularly if you are interested in comparing the results to a specific reference (e.g. paper, steam tables, text book etc.). Still, you may find ... |
Problem Statement: How to resolve the pop up error received in Excel -Run Time Error '1004': Cannot edit a macro on a hidden workbook, unhide the workbook using the unhide command ? | Solution: This problem is caused due to a setting enabled in PIMS, this issue can be resolved by disabling the Excel add in setting in PIMS.
1.Open PIMS > Tools >
2. Go to Program Options (Spreadsheets) > Enabling “Do not load installed Excel Add ins on launching Excel” , The purpose of this setting is for if you ar... |
Problem Statement: How do I create a stream or unit operation Results Table with a set of user default variable in Aspen HYSYS? | Solution: When you right-click on any stream or unit operation icon in the Flowsheet and select Show Table, a default properties set Result Table appears. You can modify the set on properties for each stream/unit operation, but when adding a new Result Table, it will contain the default properties set.
To modify the d... |
Problem Statement: Where can I find a list of the functions used by the Spreadsheet? | Solution: You can find a detailed list of functions and syntax used in Spreadsheet Operation by pressing on Function Help located at the bottom of Spreadsheet window.
Keywords: Spreadsheet, Functions
References: None |
Problem Statement: How can I customize my unique AspenHysys workbook template and apply it to multiple simulations? | Solution: Follow the steps to create customized Workbook view in
Knowledge Article 109088-2: How do I create a custom tab in the workbook?
To set it as a template for repeated use, on the Export tab, select either the Workbook or Pages option.
If Workbook option, give it a file name and select a folder to save in. It w... |
Problem Statement: This Knowledge Base article provides steps to resolve the following error:
“Failed to validate install, install directory: xxx
which may be encountered when one attempts to upgrade a 32-bit version of the Aspen InfoPlus.21 database to a 64-bit version. | Solution: When upgrading from a 32-bit to a 64-bit version of Aspen software, you must first uninstall the 32-bit version, reboot the server and then install the 64-bit version. This is as designed and as expected because there is no direct upgrade method from a 32-bit version to a 64-bit version.
To summarize: The fi... |
Problem Statement: What are the recommendations of Recycle Efficiency and PV Work Term for full liquid systems? | Solution: For full liquid system, the recommendation for the recycles efficiencies in the depressurizing utilities is 1% for each phase and for PV Work Term is 60-70%.
Keywords: Recycle Efficiency, PV Work Term
References: None |
Problem Statement: The TRANCOL report was not previously available for PIMS-AO executions | Solution: V10 now allows generation of TRANCOL reports for PIMS-AO executions. These reports can be viewed in the traditional Excel, HTML, or TXT formats. Alternatively, the new AO Marginal Analysis Viewer can be used which allows you to perform what-if scenarios by seeing results when swapping independent and depende... |
Problem Statement: When doing tray design in Aspen HYSYS, I got below warning even I have KG-Tower software installed and running.
How to activate KG-Tower in HYSYS? | Solution: The issue is basically that HYSYS does not support KG-Tower versions released after that HYSYS release. For example, Aspen HYSYS V7 and V8 do not support opening KG Tower V5.1 from within HYSYS. You need to upgrade HYSYS to newer versions (like V9 or V10).
Keywords: KG-Tower
Version
Activation
References: Non... |
Problem Statement: Starting from Aspen InfoPlus.21 cumulative patch V7.3.0.3 and higher, there Is an application that allows the user to redefine certain Aspen InfoPlus.21 folder locations. This is to help users who do not want these folders to be in the Microsoft default locations in the system drive.
The Aspen InfoPl... | Solution: The following folder locations are defined in the IP21Profiles.xml
<IP21 Data Root>
Aspen InfoPlus.21 root folder. Other folders locations are derived from this folder.
<IP21GroupFolder>
Aspen InfoPlus.21 group folder where snapshots, out and error files are located.
<SQLplusCompressedSource>
Location of the ... |
Problem Statement: How to exclude NobleNet Portmapper service from IP21 Health Check monitoring? | Solution: 1. Edit the file ..\AspenTech\InfoPlus.21\db21\etc\ ServicesList.cfg
2. Comment the line “NobleNet Portmapper for TCP;NobleNet Portmapper for TCP
3. Stop\start TSK_HLTH
Keywords:
References: None |
Problem Statement: When using Calculator block in Aspen Plus, a warning message Disable FORTRAN BLOCK RESULTS due to variable accessing or Disable FORTRAN BLOCK OUTPUT due to variable accessing showed in Control Panel and this block never executes. How can this problem be fixed?
Root Cause:
This warning message indica... | Solution: Try to activate all the streams or blocks that the Calculator block is trying to use.
Keywords: Aspen Plus, Calculator, Deactivate, Fortran
References: None |
Problem Statement: How to resolved the problem that Reported Compositions in Aspen Plus Do Not Reflect Specified Input? | Solution: To avoid this problem, make sure that feed composition inputs add up to unity
Calculate one component composition by difference (1 – xxxx).
Normalized the composition in Excel before sending to Aspen Plus.
To copy all stream composition values at once, you can use Excel copy-paste to copy the composition valu... |
Problem Statement: When any DMC plus system is upgraded from lower to upper version, the old license file needs to be replaced with a new file. Once the replacement is complete, whether or not the DMC plus/DMC3 applications are able to acquire the license and working fine needs to be ensured. The steps to validate the ... | Solution: .Solution
To validate any DMC plus/DMC3 application after an old license file is replaced with a new one, following steps are to be performed on the machine:
DMC Plus application
1. If DMC+ Model is installed on the machine where file is replaced, start this program through Start\Programs\Aspentech\
a. ... |
Problem Statement: When I do a simple Copy and Paste a plot into Excel, I find that I cannot edit or move the plot. Why does this happen and what do I do if I want to make changes? | Solution: When you copy a plot it is saved as a bitmap.
Using a simple paste in Excel, it assumes that the plot is an Activex Object and that is how it is pasted by default. Alternatively you can use Paste Special instead of a simple Paste (from the Edit menu choose Paste Special, or use the right mouse button on the s... |
Problem Statement: How do you manually change the authentication mode of SQL Express to SQL Server Authentication Mode? | Solution: There are two possibleSolutions to this problem.Solution 1
AspenTech applications require Microsoft SQL Server Express to be installed with SQL Server Authentication Mode in order for Aspen Properties Enterprise Database (APED) to function properly. Check the aspenONE Installation guide for the version of SQL... |
Problem Statement: Ramp-handle MVs with Test Swtich set to OFF seem to be stepping when in calibrate mode | Solution: This behavior is by design. When a controller is in Calibrate, the level is treated by the engine as a programmed imbalance so it would float around rather than controlling at setpoint. When the level is close to a limit, the controller will calculate MV moves in order to balance the ramp and turn it around.... |
Problem Statement: How do I copy record security permissions using IP.21 administrator and then paste them to another record? | Solution: Make sure you have Change Security user rights.
Right click and select copy permissions from the source record.
Then right click on the database (first branch in the administrator) and choose paste permission. A pop-up screen will appear, into which you can drag & drop the destination records to which you wan... |
Problem Statement: What is the Difference Between a Hypocomponent and a Hypogroup in HYSYS? | Solution: A Hypocomponent is a single pseudocomponent. A Hypogroup is collection of individual Hypocomponents. Hypogroups are useful because the Hypocomponents within the Hypogroup can be edited all at once using the Hypotheticals Manager (accessed from the Home ribbon). For example, the Heat of Vapourization method... |
Problem Statement: What are the new external tasks added to Aspen InfoPlus21 Manager starting from V9.1?
TSK_ALRT
TSK_PMON
TSK_ROOTCAUSE | Solution: The tasks TSK_ALRT, TSK_PMON, and TSK_ROOTCAUSE are added starting from V9.1 are related to the Alerts, Pattern Matching, and Persistent alarm functionality respectively which provides added functionality to aspenONE Process Explorer. For more information related to these tasks refer to Aspen InfoPlus.21 Mana... |
Problem Statement: How do I delete an ABE workspace? | Solution: Delete the workspace from the AdminTool using the right-click menu on any workspace. Please note, this is only recommended to be performed by ZyqadAdministrators.
If the workspace just deleted connects to either a SQL Server or Local DB Server, please use the SQL Management Studio to delete the actual databa... |
Problem Statement: Can DMC3 Builder import .prd file (DMCPlus Model prediction file)? | Solution: No. DMC3 Builder cannot import a .prd file.
However, DMC3 Builder can import .cas file (exported cases from DMCplus Model) and these cases after import in DMC3 Builder can be run to get predictions.
Keywords: .PRD
.CAS
Predictions
References: None |
Problem Statement: Can I add new CVs to the controller without revising the Foxboro bridge database and the DMC DCS graphics? | Solution: New CVs can be added to the controller if the CV measurements can be read directly from the OPC server using Cimio for OPC instead of using the FoxBridge interface.
It is also important to note that adding a CV to a controller without updating the FoxBridge and DCC Graphics is not recommended. This is becaus... |
Problem Statement: Is the calculated Mach number based on mass (design) flow or rated flow? | Solution: Aspen Flare System Analyzer calculates the Mach number of all pipes based on the specified mass (design) flow.
However, if the user decides to use the relief valve’s rated flow for tailpipes, the Mach number for the pipes specified as tailpipes will be calculated based on rated flow.
ThisSolution illustrate... |
Problem Statement: How to minimize breaking links between ASW workbook and (Aspen Plus, Aspen HYSYS or Aspen EDR) model variables?
Root Cause:
The links between ASW workbook and simulation model variables can be broken in many ways. The best practices followed by root cause explanation show in “ | Solution: ” section.
Solution
1) Do not edit a simulation while developing the ASW interface.
- Problems may occur if you change the paths or delete variables that are linked in ASW, and in turn, this may cause ASW links to stop working.
2) Never save a simulation with a new name while it is open in Aspen Simulation W... |
Problem Statement: If closed by accident, how do I re-display the Model Palette in Aspen Plus? | Solution: In Aspen Plus, there are two methods to turn the Model Palette on and off:
The hotkey (shortcut) method: Press the F10 key to toggle the Model Palette
The manual method:
In the Simulation Environment
Click the View tab in the Ribbon and then click the Model Palette button
You may hover the mouse pointer o... |
Problem Statement: APC controller with direct OPC connection can not write to certain DCS tags while CIMIO for OPC can. The observed error status is failure with E_BADTYPE | Solution: For certain OPC server, a Write from a client has to match data type of the DCS point before the written value is accepted. A mismatch data type will result in a write failure with an error status E_BADTYPE. Reading the same tag returns the valid value with no error status.
CIMIO for OPC is an OPC client b... |
Problem Statement: What does the Yld checkbox do in the Schedule Bias Dialog in APS? | Solution: If you select the Yld checkbox, the formula used is:
Biased Yield = Current Yield + % Factor * Current Yield
The Constant column is ignored and the factor is assumed to be percent.
For example if the Factor is 1.5 and the yield is 8.0 then
Biased Yield = 1.5/100 * 8.0 + 8.0
This is a different formula th... |
Problem Statement: I have a spreadsheet used to define a stream's composition. Adding a new component to my simulation (from the Properties environment) causes the simulation to unsolve when the Simulation environment is re-entered. Why is this? | Solution: When a user inputs compositional data into a stream (from the composition input form), the stream object is able to modify this data (if necessary) to normalise the stream compositional data (i.e. the stream data can be changed, but maintained in the same proportions such that their sum is equal to unity). A ... |
Problem Statement: An IQ application sets AZUFLAG to one to indicate a new analyzer update is received and validated, does it reset it back to zero? | Solution: When an IQ application with analyzer update module (AZU) receives a new analyzer reading and the analyzer reading passes the validation process, IQ sets the AZUFLAG parameter to one and writes it out to the DCS (if configured). IQ will only write out a one to the flag and only when it has a new, validated an... |
Problem Statement: Since ADSA Directory Server version 7.0, there have been two protocol options available, DCOM and Web Service. You should choose the Web Service protocol if there is a firewall between your computer and the ADSA Directory Server. When you select Web Service and click the Test button, you get an error... | Solution: You must add the ADSAWebService application to IIS on the ADSA Directory Server.
Open IIS, navigate to the Default Web Site under the ADSA Directory Server's node and follow these instructions:
1. Right Click, select Add Application and populate the form with the following values:
· Alias = ADSAWebSer... |
Problem Statement: For Example, crude ABC is a CRDBLEND of 20% AAA and 80% BBB. AAA and BBB have SPG in table BLNPROP of 0.8156 and 0.8081 respectively. Hand calc of the ABC SPG is then 0.8096. However, in the full | Solution: report Purchases for a volume based model, the column Weight is using 1.0 as the SPG of ABC, instead of the correct SPG 0.8096. This results in the overall Recovery Wt% to be way off because the reported mass of crude is much higher than it should be. Why does this happen?
Solution
PIMS is using 1 as the SPG ... |
Problem Statement: How do I use the Export/Import feature in Aspen Flare System Analyzer? | Solution: Steps to Export:
1. Open the case file and go to File --> Export Case In.
2. Enter a file name such as 'C:\abc.mdb' . The path can also be defined using the browse option.
Additional Notes:
A. Out of three file options: .mdb, .xls and .xml; '*.mdb' format works fine in every case. The format *.xml does ... |
Problem Statement: How do I report viscosity in stream results in V9 and later version? | Solution: In order to report viscosity in stream results, you may follow this procedure:
1- Run the simulation.
2- Click Results Summery/Streams. Then, scroll down and click on <add properties>.
3- From the “Enter a search string”, select MU for the pure component viscosity or MUMX for the viscosity of the mixture fro... |
Problem Statement: How to size a LNG (Plate Fin Exchanger) without importing an EDR model in Aspen HYSYS? | Solution: In Aspen HYSYS, if the Convert to Rigorous option is selected an EDR model is required.
To perform the design/sizing of a LNG or Plate Fin exchanger without importing an EDR model, follow these steps:
1. Go to the Simulation Environment and open the LNG operation
2. Go to Design | Parameters an se... |
Problem Statement: In some instances, filter FIR model does not identify correct steady state gain for fast dynamics. | Solution: This is a well-known short-coming of FIR smoothing algorithm, it tends to may adversely affect model responses with fast initial dynamics, for example valve position models. The smoothing logic in FIR algorithm performs a trade-off between fitting the step test data as accurately as possible while not fitting... |
Problem Statement: HPT plots show old controller names if the controller name is change in Aspen Watch. | Solution: The cause of the issue is that the Tomcat database used in HPT search is not automatically updated when the Aspen Watch/Infoplus.21 (IP.21) database is updated with the new controller name. The user would have to manually update this database by performing a re-scan of the database using PCWS, just like when... |
Problem Statement: What is the syntax needed when using VBA or Aspen SQLplus to create, query and display batches? | Solution: 1. Creating a Batch
The following SQLplus example creates a new APRM batch on data source server1 in area demo with batch number 987.
It sets the START TIME, END TIME and PRODUCT PLANNED characteristics.
It then creates a sub-batch, DUMP and sets characteristics UNIT, START TIME and END TIME of this sub-bat... |
Problem Statement: I want to specify a power law kinetic which depends on the reactants and on a catalyst concentration (homogeneous catalyst which is flowing with the other components). Suppose I am considering the following reaction: A + B --> C and I have a catalyst, which is D. The kinetic that I want to specify is... | Solution: To define a reaction in Aspen Plus which is taking into consideration the catalyst concentration for a power-law kinetic, one has to create the reaction as POWERLAW or GENERAL type. You can select the catalyst as a reactant, but the stoichiometric Coefficient should be set to 0, so that it will not be consume... |
Problem Statement: How do I set up a Particle Size Distribution (PSD) for solids modeling in Aspen Plus? | Solution: The attached Aspen Plus V8.8 demo will show you how to define a PSD and use user-guidance diagrams to ensure that the PSD mesh is appropriate for the defined distribution. There is an associated PDF to guide you through the steps.
Click here to play the demo.
This example will cover
· Creating a PSD m... |
Problem Statement: How do I resolve the error Unable to Rename File TEMP.MPS to MPSPROB.MPS when I run a model in PIMS? | Solution: You could be seeing this message because the operating system might be temporarily locking the file. Please try to turn off the indexing and virus scanning for the model folder and this should help resolve the issue.
To turn off File indexing, follow the steps below:
Press Windows Key + S and enter indexing. ... |
Problem Statement: Can V8 co exist with V7.3.2 on same computer? | Solution: Generally, major versions of Aspen Plus can run at the same time on the same machine. We have tested AES V7.3.2 and V8 running on same machine and both versions work in the presence of each other. AES V7.3 and earlier versions can also coexist with AES V7.3.2 and V8 and do not interfere with one another.
Keyw... |
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