question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: What are the database roles required for SQL Server Management Tool? | Solution: The following roles are needed to perform certain actions in PIMS SQL Server Management Tool:
The sysadmin Server Role is required to create or delete a database. (Security | Logins | *USER* | Server Roles).
Under User Mapping, the db_datareader, db_datawriter and db_ddladmin database role memberships are re... |
Problem Statement: What can cause some local model structure to be missing when running a global model in Aspen PIMS V11? | Solution: In PIMS V11 and V10 CP3, fixes were made to ensure the global overrides for tables BLNSPEC, CAPS, PROCLIM are all correct as documented in the HELP. This could cause the objective function to be different compared to previous versions of PIMS.
For BLNSPEC, you should see W353 if the global BLNSPEC is ignored ... |
Problem Statement: When converting Titan version 2 file to an Aspen Fidelis Reliability, the converter does not allow this action to happen. It shows an error message saying "Operation is not allowed when the object is closed." | Solution: Titan2 version needs to be 2.24.74. In a later version is added a new property to pipes that Titan2 does not have.
To avoid this issue:
Uninstall your current version of Titan2
Install the Titan version 2.24.74
Open any old *.fid files and simply save (not need to do a Save As, just click Save or the Save bu... |
Problem Statement: How to calculate the volume flow at standard conditions from the free expansion volume flow calculated in the tail pipe boundary of BLOWDOWN. | Solution: To calculate the volume flow at standard conditions from the Free Expansion Volumetric Flow calculated in the tail pipe boundary of BLOWDOWN it is necessary to follow the steps described below, as this calculation is not performed directly in the BLOWDOWN Analysis.
In the parent flowsheet place an independent... |
Problem Statement: Can I use the Rated capacity of a header to calculate Acoustic Induced Vibration in Aspen Flare System Analyzer? | Solution: Since AIV calculations were introduced into AFSA in V9.0, these calculations have used the actual Flow through an object.
In V11.0, a new option has been introduced that allows the user to switch between this current Required Flow and the Rated capacity in the elements to be analyzed.
The user can control... |
Problem Statement: How to set a color scheme in a score plot | Solution: Aspen ProMV allows the user to create a full level spectrum based on the score. To do that, please follow these steps:
1. In the Score Plot do right click and select Properties
2. In the Coloring Ribbon of the Plot Properties Window, select the desire method and style to sort the values. Then click in Appl... |
Problem Statement: In the Safety Analysis, the PSV allows the user to add PRDs (arranged in parallel) to the relief system. | Solution: To add PRDs to the current valve, please follow these steps:
1.- Go to the PRD Data tab for relief device and click on the Add PRD button to add a second PSV.
2.- In the Rating tab, set the desire Allowable Overpressure (%) for the primary PSV and the set Pressure Increase for the secondary PSV
3.- Ensure tha... |
Problem Statement: Differences in shell side velocity between EDR versions | Solution: The shell side model considers that there are different components for the shell side flow:
Crossflow (B stream): Only the crossflow (and part of the window flow) contribute to the heat transfer. The crossflow fraction usually ranges from 30-70 % of the total flow. Lower values will give lower pressure dro... |
Problem Statement: How to use the "Custom Curves" & "Custom Attenuation" for the AIV Calculations | Solution: Aspen Flare System Analyzer allows the users to enter its own "D/t" and "dB" values to perform the AIV Calculations for the pipes in the network.
Note: These values are coming from operating companies standards (or already implemented curves like CSTI) and are given for calculating acceptable dB (based on th... |
Problem Statement: Procedure to import Aspen HYSYS models to Aspen Economic Analyzer (APEA). | Solution: This solution discusses the step by step procedure to import simulation data obtained from an Aspen HYSYS model into Aspen Process Economic Analyzer.
1. Load the Aspen HYSYS file and make sure all unit operations have converged results and none of them have errors. It's important to make sure all results are... |
Problem Statement: By default Aspen Flare System Analyzer only shows the iteration error for the whole network in the trace window, not the error per unit in the iteration. | Solution: If the user wants to track a detail information of the iteration process inside Aspen Flare System Analyzer, please follow these steps:
1. In the Home Tab, click Calculation Settings
2. In the Solver Tab, check the "Echo error history" and click OK
3. In the View Tab click the Trace option and run the m... |
Problem Statement: Is it possible to know Aspen HYSYS file original version? | Solution: It is very common for users to need to know what version was an Aspen HYSYS file originally developed. This is especially important when the file was saved on a newer version and user is working on an older version, which means the user will not be able to open such file. On those cases, Aspen HYSYS displays ... |
Problem Statement:
In VSTA coding for an AFR module if random.next instruction is declared the sequence of randomness is not "random"; also it does not fix the specific iteration.
Example: When the first iteration is run it will give some values that are not accurate to the ones in the module and when is run it again ... | Solution:
To get repeatable random numbers, is needed to use the same seed value.
Please have a look at the examples on MSDN Random Constructor.
KeyWords:
Random, random.next, VSTA coding, Seed value, Random objects.
Keywords: None
References: None |
Problem Statement: When calculating Entropy Departure using Aspen HYSYS fluid package, I get a different value than that obtained when using the same fluid package in Aspen Properties. | Solution: The formula to calculate entropy departure (S-SIG) in Aspen Properties is different than that in Aspen HYSYS.
In Aspen HYSYS, the entropy departure function is calculated using equation (1):
(1)
Where:
S = Molar Entropy
SIG = Molar Ideal Gas Entropy
R = Gas Constant (8.314 J / (K x mol))
Z = Compres... |
Problem Statement: As mentioned in the article What is the "Choose Label Variable" in Aspen HYSYS V8?, the user can display at the same time 2 different variable labels for the Material Streams on the PFD, but in some of these labels contain an asterisk (*) next to the value, and others don't. | Solution: The variables that are user inputs will have an asterisk (*) on its variable label, while the variables calculated by Aspen HYSYS won't.
Keywords: PFD Label, Asterisk, Display, Material Stream, Input, Calculated.
References: None |
Problem Statement: How to fix the message ERROR> 'LIB- #' CODE OF ACCOUNT IS NOT DEFINED? | Solution: This error message appears on the Economic Evaluation software when the COA for a Unit Cost Library item (LIB model) has not been correctly defined.
To solve it, the user should check the following:
On the Codes of Accounts Definitions, check if the defined COA indeed exist on the list.
If the COA is user... |
Problem Statement: What is the root cause of the following error message?
ERROR> 'CCP- #' PIPELINE SEGMENT IS ALLOWED ONLY IN PIPELINE AREAS? | Solution: This message appears in an ACCE project when a component of the “Above grade or buried pipeline segment” class (PCCP) is added into a regular ACCE area (Grade, Pad, Open, Module, etc.).
These types of components are special and can only be correctly evaluated when these are added into a Pipeline Area. For inf... |
Problem Statement: After migrating datasheet from previous versions to V10 or V11, the "Select Class" list no longer shows the defined classes when generating a new datasheet (creating a blank datasheet not associated with any equipment objects). | Solution: Starting in V10, a functionality was added to hide sub objects or objects which were determined as not likely to be created as a standalone object. When the HideForDisplay flag is set in the Datamodel, users will not have the ability to create the objects via the "Select Class" list. Users can either change t... |
Problem Statement: Why do I get the “Result Warning 1299: Thermal leakage across the longitudinal baffle is estimated to be significant (…)”? | Solution: After completion of the main calculation, thermal leakage across the longitudinal baffle is estimated based on some simplified assumptions (the procedure is explained in the HTFS report SM25: Estimation of Thermal Leakage Effects in TEMA F-shells). This does not affect the results and is only used to issue th... |
Problem Statement: What is the difference between the Classic and the Online Dynamic alignment methods? | Solution: Aspen ProMV have two different methods to align batch data:
The Classic method allows to use the following approaches:
Linear interpolation of the time scale: The user must choose the variable to warp against (Clock_Time is the default).
Offline Dynamic warping: Calculates an optimal match between two given ... |
Problem Statement: How to attach a petroleum assay to a material using VBA? | Solution: To attach a petroleum assay is necessary to use backdoor mechanism by the command Call simcaseBackDoor.SendAttachObject2("FlowSht.1/StreamObject.400(1)/Viewable.397:PetroleumAssay.500", assayMoniker). For further information of how to use a backdoor method please refer to the following article How to use the ... |
Problem Statement: Is possible to edit the wetted area exponent for fire calculations? | Solution: Starting in V11, Supercritical, Wetted (API), and Semi-Dynamic Flash Fire scenarios now allow you to edit the wetted area exponent for fire calculations involving partial confinement.
This new feature was added to model fire under an air-cooled exchanger and partially enclosed fire, as the API 521 allows u... |
Problem Statement: Why does the Tube Wall Thickness reported on the TEMA sheet not match with the Tube Wall Thickness input? | Solution: On Plain tubes, the tube wall thickness input is effectively the value reported on the TEMA sheet (Tks, Average).
However, for Lowfin tubes, the Tube Wall Thickness input refers to the unfinned regions, and the TEMA output reports the Tube wall thickness under fin (thickness on finned region), which can be sp... |
Problem Statement: How do I prevent the tray warning/error "Total liquid rate is above the maximum weir loading" on Aspen HYSYS? | Solution: On distillation tray columns, at high weir loadings, possible adverse hydraulic results as follows:
Large crests and high froth heights and “jet flooding”
Crests that are so large that those crests do not fit into downcomer mouths, and “choke flooding” occurs
High froth heights sometimes yield excessive press... |
Problem Statement: What information should I enter in the Equipment/Item Class and Equipment/ItemType fields when adding a User model in the Economic Evaluation (EE) products? | Solution: The Equipment/Item class and type are used to allow the EE applications to calculate the Engineering cost of items not included in the system library, such as Quoted Equipment and Equipment Model Library (EML) objects.
If the entered class and type symbols match with one applicable combinations of system symb... |
Problem Statement: As mentioned in the article How can I use MS Excel to retrieve the heating and cooling curve of a heat exchanger in user specified units? the user can retrieved information from the heating and cooling curves using VBA macros but due to the structure underlying the scripts of the above article, it wi... | Solution: Below is some sample VBA to show how to get this value as a workaround:
Private Function GetCurveOffset(ByRef hcurve As HeatExchangerCurve) As Integer
Dim bdCurve As BackDoor
Dim curvenames As TextFlexVariable
Dim names() As String
Dim i As Integer
GetCurveOffset = HEmpty 'initialize ... |
Problem Statement: How to calculate the maximum flow allowed for a valve for which the valve flow coefficient (Cv) is already known? | Solution: To be able to calculate the maximum flow that is going to be allowed through a valve for which we already know the Cv it is necessary to look for the flow at which the valve may be choked, to do this we must iterate the inlet flow value until the error message "The valve rating method fails to find a solution... |
Problem Statement: What does the following error message mean and how do I fix it?
FATAL> 'GP - n' DATA SEQUENCE ERROR OR INCOMPLETE DATA SET | Solution: This message appears in an ACCE project which has enabled the Pipeline Areas and it refers to incomplete information present in the current project.
The root cause of this message is that no components have been yet added to the Pipeline Area. Different from regular process areas available in an ACCE project,... |
Problem Statement: A desalter unit in an oil refinery is a process used to remove salt from crude oil. The salt is dissolved in the water, not in the crude oil itself. Is it possible to model such a unit in Aspen HYSYS? | Solution: Up to V11, there is not a specific unit operation to model a crude desalter unit in Aspen HYSYS. However, the vessel itself can be modeled using a three-phase separator. To model the salt content, you would have to use an Electrolyte Thermo package such as OLI or Electrolyte NRTL from Aspen properties.
Pleas... |
Problem Statement: When a data source is deleted from ADSA before it is purged from aspenONE Search, it will continue to appear in the Add Tags.. search results. This is because purging the data source after it has been deleted from ADSA will not remove it from aspenONE Search, so the question is:
How do I delete a pur... | Solution: To delete an old data source, paste the following URL into your web browser's address bar (after making necessary changes described below):
http://<web_server_name>:8080/solr/update?stream.body=<delete><query><![CDATA[(ace_nav:tag)AND(tag_datasource:<old_data_source>)]]></query></delete>&commit=true
-where-
... |
Problem Statement: I have multiple versions of Aspen Flare System Analyzer installed on my machine but cannot get to import HYSYS stream sources into my Aspen Flare model. What can I do to resolve this problem? | Solution: Sometimes, when multiple Aspen Flare System Analyzer (AFSA) versions are installed on a machine, the ‘Import HYSYS Stream Sources’ feature might not work properly.
Something that usually makes the trick to overcome this issue is to run the Aspen HYSYS ‘Set Version’ tool (as Administrator).
... |
Problem Statement: I am unable to import my RAM asset register into my Aspen Fidelis Reliability (AFR) model | Solution: Aspen Fidelis Reliability gives users the option to populate their simulation models’ RAM data using the Import function in the RAM Data environment, Home ribbon.
If you find that you are unable to import Ram data and instead are receiving an error message from AFR, try the following:
Check that all the tabs ... |
Problem Statement: What does the following message mean and how do I fix it?
“Pipe #: The estimate for the outer heat transfer at segment #, increment # may not be valid because the heat transfer is a mixture of free and forced convection" | Solution: This message is generated when the specification for air velocity, in the HTC pipe calculation is very low.
Increasing the value for the air velocity can get rid of the message.
At low velocities, HYSYS assumes the heat transfer could be caused due to fixed and forced convection, however, HYSYS currently ha... |
Problem Statement: Why Does Changing Dimension Set Not Change Unit In Drawing Editor? | Solution: When using the OOTB Heat and Mass Balance (HMB) Header in Drawing Editor, the user may notice that changing the Dimension Set in Explorer does not convert the value displayed in the HMB in Drawing Editor. The Dimension Set actually is supposed to have effect on the entire workspace. The reason why variables a... |
Problem Statement: When attempting to open any Aspen Fidelis Reliability (AFR) file, the user gets the recurrent error message "Recover Model", even if the model was saved correctly. Choosing “Discard Recovery”/”Save Backup As” does not solve the error. | Solution: This error happens when there are unrecovered files, from a previous crash for example. If something got stuck in the temp files that might cause this error to pop up unexpectedly.
To solve this issue, the users can manually clear their temp folder cache:
Make sure there are no instances of AFR open on the ma... |
Problem Statement: Is there an alternative to the SUMIF formula in Excel to maintain OXE compatibility? | Solution: Currently in APS, the SUMIF formula is not OXE compatible. To maintain the OXE compatibility, you can use a combination of the IF and SUM formulas as follows:
1. IF(D15=5,E17,0)+IF(D16=5,E18,0)+IF(.....)+IF(......)..., or
2. Put all IF conditions in a column below #END and then have a SUM function at the bott... |
Problem Statement: How to convert a standalone model into an online continuous model | Solution: Aspen ProMV is a multivariate data analysis (MVA) software package that allows the user to deploy and monitor real time models. To deploy an online model, please follow the following steps:
1. Open the desire standalone model, right click and select “Export Online Model”.
2. Open ProMV Online Continuous and ... |
Problem Statement: How do I prevent the tray warning/error "Total liquid rate is above the maximum weir loading" on Aspen Plus? | Solution: On distillation tray columns, at high weir loadings, possible adverse hydraulic results as follows:
Large crests and high froth heights and “jet flooding”
Crests that are so large that those crests do not fit into downcomer mouths, and “choke flooding” occurs
High froth heights sometimes yield excessive press... |
Problem Statement: What’s New in V11: Better User Control of Fire Water Header, Loop, and Lateral Piping Calculations | Solution: Currently in the utility piping plant bulk and area level utility piping, the length of firewater loop and firewater lateral piping lines is based on the utility length parameters. The length of firewater loop and firewater lateral lines is 2 times the utility length parameter. Because it is typically differe... |
Problem Statement: How to use drag and drop functionality in EDR V11? | Solution: Any input node in the EDR navigation tree can be dragged from the source EDR application and dropped anywhere in the target EDR application. Drag and drop can only be between two EDR applications of the same type
The EDR Navigator is shown below. For example, to copy all exchanger geometry, click and drag t... |
Problem Statement: Is possible to define the Orifice Designation and the In/Out Flanges sizes for a PSV Custom Size Orifice? | Solution: For Standard API orifice sizes, the Orifice Designation and the In/Out Flanges are selected for you as per API 526.
Starting on V11, is possible to define those values for Custom Orifices sizes as well. This can be done from from the Preferences Manager | Orifice Manger, on the ‘Designation’ column. The repor... |
Problem Statement: For the Leung Method in PSV Line Sizing, what is the difference between “In line: K Entrance” and “In line: K in” and what information should I enter/read? | Solution: Overall, “In line K” represents the fitting loss coefficient in the inlet piping line. This coefficient is calculated from the fittings that are installed in the pipe. When using the Leung Method, there is no automatic way of calculating the equivalent length from a fittings list, so the coefficient K is used... |
Problem Statement: Do applications that connect to Aspen InfoPlus21 via the API or ODBC return data when Aspen InfoPlus21 is in license denied status? | Solution: YES; Applications that connect to Aspen InfoPlus21 via the API or ODBC will continue to return data. Only applications that verify the license status like Aspen Process Explorer will fail to return data when Aspen InfoPlus21 is in license denied status.
KeyWords:
license denied
api
odbc
Keywords: None
Ref... |
Problem Statement: Why a PRD reports "zero/empty" for its flange sizes? | Solution: In the Aspen Safety Analysis Environment, the flange sizes are populated according to the American Petroleum Institute (API) standard guidance table (API 526). When you select a Standard valve orifice, Aspen HYSYS checks that the Pressure and Temperature Limits are not exceeded for the selected valve. If thes... |
Problem Statement: How are substreams defined and how do they work? | Solution:
Substream classes are the building blocks of stream classes. Stream Classes are used to differentiate between the properties of each substream in the simulation.
The Substreams classes are for usage of specific types of components on the streams. Depending on which substream class is selected on the Stream C... |
Problem Statement: Can Aspen Flare System Analyzer perform heat transfer calculations with the environment? | Solution: Aspen Flare System Analyzer (AFSA), can perform evaluations of the transferred heat between the pipe operations and the external environment.
To activate these calculations, the user should verify the following inputs are correctly activated:
1. Under Home | Calculation settings, make sure the checkbox is act... |
Problem Statement: How can I control the number of rows or columns in the Spreadsheet operation in Aspen HYSYS? | Solution: The user can adjust the number of rows and columns on the top left hand corner of the Parameters tab.
The effect will take place once the user switches back to the Spreadsheet tab of the unit operation, the number of rows and columns will be adjusted to those values specified on the Parameters tab.
Keywords... |
Problem Statement: When using the Aspen Properties add-in in Excel, is it possible to review a historical record of the calculations the Add-In performs, as in Aspen Properties Standalone? | Solution: When running an Aspen Properties Excel add-in file, a temporary history (*.his) file is created under "C:\Users\username\AppData\Local\Temp"
This temporary file, however, does not store the full historical record as Aspen Properties Standalone does, so it's recommended to run the standalone application to o... |
Problem Statement: What is the name of the OPC.DeltaV.1 COM application? | Solution: The COM application name for the OPC.DeltaV.1 OPC server is “FRSOPCDV”.
KeyWords:
DCOM
dcom
identy
Keywords: None
References: None |
Problem Statement: How to replace the IO_Tagnames in Aspen CimIO transfer records using Aspen SQLPlus. | Solution: Here is a query that updates the IO_Tagnames in transfer records for existing occurrences. A CSV file with the format “IO_TAGNAME, IO_VALUE_RECORD&FLD” that contains the updated tag names and existing record and field names is required. IO_Record_Processing must be OFF for the transfer record(s) that will b... |
Problem Statement: How are Electrical Testing Man Hours calculated? | Solution: ACCE calculates and reports testing man hours for Electrical items in COA 791(Electrical Circuit Testing). These man hours are reported at the area level and do not include any material costs.
The Man Hours for electrical testing are calculated as a contribution of the items installed at the Area level as co... |
Problem Statement: The Aspen Plus stream report is not showing any results. Although the simulation status shows the Results are Available, no data is displayed on the Stream Summary form. | Solution: If you are using Aspen Plus V10 and seeing this behavior, please review article 47643 and try the solution recommended beforehand.
A certain degree of corruption in the file can cause this type of behavior, where the results are indeed calculated and present, but the stream summary is not able to display them... |
Problem Statement: Is possible to specify the BatchSep External Exchanger is used for heating AND cooling? | Solution: From BatchSep | Heat Transfer | Configuration | External exchanger you can click on both Heating and Cooling options to specify the unit is used for heating AND cooling. From there you need to choose which will be the Initial Mode as well:
Then you will need to define the Externa Exchanger Heating and Coo... |
Problem Statement: How can I include a heat exchanger in an Aspen Flare System Analyzer simulation? | Solution: Aspen Flare System Analyzer does not have a heat exchanger model, since it focuses on analyzing the hydraulic aspect of the flare network.
However, the user can add a dummy pipe, which preferably should have the same diameter as the upstream pipe and 0.0 length to avoid unexpected pressure loss.
After adding ... |
Problem Statement: How is Aspen Online connected to retrieve/send data from/to IP.21 (on V9 and newer versions)? | Solution:
Aspen OnLine (AOL) allows automation of the transfer of validated plant data to rigorous process models, removing the need for engineers to perform the laborious and repetitive task.
Due to this information transfer, it is required for AOL to communicate with both the Data Historian and the Advanced Process... |
Problem Statement: Is possible to include Column Internals on a BatchSep? | Solution: When Pressure Profile and Holdups are calculated from tray and packing hydraulics (A) (Setup | Configuration), tray and/or packing geometry must be specified for each stage on the Column Internals form (B):
You can define multiple sets of column internals, but only the one marked as Active will be used f... |
Problem Statement: Why is Aspen Flare System Analyzer not using the Heating spec I enter for a pipe? | Solution: In Aspen Flare System Analyzer (AFSA), the user can enter either a Duty value or an Outlet Temperature value to be applied to any pipe unit operation on the Heat Transfer Tab.
AFSA is also able to calculate the heat transfer across a pipe exchanged with the environment, using the ambient temperature and wind ... |
Problem Statement: Where are AspenONE installation logs located? | Solution: The AspenONE installation logs are located in C:\Users\USERNAME\AppData\Local\Temp
KeyWords:
log
MES
Keywords: None
References: None |
Problem Statement: Can I overwrite the Heat of Reaction calculated by HYSYS to match experimental or literature data? | Solution: The Reaction Heat in HYSYS is a calculated value and can not be directly entered by the user. This value is calculated using the Heat of Formation at 25 C values of the participating reactants and products.
In order for the user to be able to modify this value, it's necessary to overwrite the Heat of formati... |
Problem Statement: How are Instrument Testing Man Hours calculated? | Solution: ACCE calculates and reports testing man hours for Instruments in COA 691(Instrument Testing). These man hours are reported at the area level and do not include any material costs.
The Man Hours for Instrument testing are calculated as a function of the instrument type and quantity in the project.
To calcula... |
Problem Statement: How does the Schedule Property Bias work for the Yields and properties to which it applies? How does it work for other properties? | Solution: Use the Scheduling Property Biasing dialog box to add, modify, and delete schedule (time-dependent) property bias . A Schedule Property Bias allows the user to modify the properties of effluent (overflow) streams.
Yield biasing is only valid for the properties: VOL and WGT.
If yield biasing is applied to the ... |
Problem Statement: Can I have multiple Aspen HYSYS cases open at the same time in the same Aspen HYSYS window? | Solution: Yes, you can have multiple Aspen HYSYS cases open at the same time.
Every time you open an Aspen HYSYS case in the same window by going to File | Open or by launching an Example file while another case is currently open, the cases that were already active are NOT closed, they are just hiding in a different ... |
Problem Statement: Do I need to install the ABE V11 Local Server on my machine to access the new PSV Datasheets in either Aspen Plus or Aspen HYSYS? | Solution: No, it is not needed to install the ABE V11 Local Server on the clients if the ABE Server being deployed is the Enterprise Server. The Safety Analysis in either Aspen Plus or Aspen HYSYS will call the PSV Datasheets from the server, where the ABE V11 Enterpise Server should be installed.
Unless no Enterpise ... |
Problem Statement: Is possible to specify the BatchSep Coil is used for heating AND cooling? | Solution: From BatchSep | Heat Transfer | Configuration | Coils you can click on both Heating and Cooling options to specify the coil is used for heating AND cooling. From there you need to choose which will be the Initial Mode as well:
Then you will need to define the Coil Heating and Cooling options from their re... |
Problem Statement: How to automatically updating attribute value based on changes made in another attribute in ABE? | Solution: Automation can be achieved in ABE using Demon and Event KB script. This article assumes users have already been familiar with the use of these two KB types. In this article, we will utilize ModifyAttribute() Event to automatically update attribute value when another attribute is modified.
A use-case for the f... |
Problem Statement: How to Uninstall AspenTech Software | Solution: Open the start menu and search for the AspenTech Configuration folder, and open the Uninstall AspenTech Software option (this requires admin rights):
When the new window opens, select the software you want to uninstall (you can select all by checking the Products option) and click uninstall to proceed:
... |
Problem Statement: HYSYS is calculating different pump powers in Dynamic and Steady-State modes. What might be causing this discrepancy? | Solution: HYSYS Dynamics has an Inertia feature that allows the user to model inertia and friction losses to the fluid:
The friction loss to the fluid can significantly contribute to the total calculated pump power:
To prevent HYSYS Dynamics from calculating the friction loss power component, set the Rotational Ine... |
Problem Statement: When using a Column Internals analysis in Aspen HYSYS, where can I find the Weir loading results of each tray? | Solution: Weir Loading is calculated and reported when performing a Column Internals Analysis. To find these results the user needs to make sure that the Column Internals Analysis has run and generated results.
Open the Hydraulic Plot results:
In the following window, select the tray or trays you’re interested on a... |
Problem Statement: Column pressure variables are not available as ‘write’ variables in the Hysys object VBA library. Therefore, when implementing an automation solution, how can the value of the variables be set from an MS Excel spreadsheet using VBA? | Solution: The Hysys type library (Hysys.tlb) contains all the objects and paramaters associated with the Hysys application and accessible via VBA in MS Excel. Users can create variables in VBA that reference these objects in the Hysys library. However, there are some objects that are not directly available in the libra... |
Problem Statement: Is it possible to model nozzle welds using UW-16 rules for Partial Penetration? | Solution:
In Aspen Shell and Tube Mechanical (EDR), every nozzle on the Code Calcs is modeled as per UW-16 section of the ASME Sec. VIII Div. 1 code; where the nozzle welds are specified. Per code, every nozzle weld specification falls into the UW16.1 sketches.
One can select most of the available ASME weld types und... |
Problem Statement: Example of a User kinetics subroutine for RBatch | Solution: Attached is an example of a User kinetic subroutine for RBatch
It illustrates the use of IRRCHK, KFORMC, and VOLL calls, and the use of RATES vector.
This routine is a simple illustration of an Aspen Plus user-defined kinetic routine that can be used with any of the kinetic reactors (RCSTR, RPlug, or RBatch),... |
Problem Statement: How can I see all the items stored inside an APWZ file? | Solution: APWZ files are compressed folders that contain the actual Aspen Plus file and any auxiliary file needed to correctly run the simulation.
These auxiliary files include Excel spreadsheets linked to a Calculator block, PSV information from the Safety Environment, etc.
The file contained inside the APWZ folder ca... |
Problem Statement: Is possible to specify the BatchSep Jacket is used for heating AND cooling? | Solution: From BatchSep | Heat Transfer | Configuration | Jacket you can click on both Heating and Cooling options to specify the jacket is used for heating AND cooling. From there you need to choose which will be the Initial Mode as well:
Then you will need to define the Heating and Cooling options from their resp... |
Problem Statement: Code calculations using Rich Text are incomplete on V11 | Solution:
Aspen Shell and Tube Exchanger V11 is 64-bit and requires 64-bit Microsoft Mathematics to be installed. On systems where this is not installed, the rich text Code Calculations report will be missing parts:
This is how the section above should look with 64-bit Microsoft Mathematics installed. The missin... |
Problem Statement: Is possible to exclude Heat Exchanger units from the Activated Energy Analysis? | Solution: The easiest way to exclude units from the Activated Energy Analysis (without deleting them), is move them to a Hierarchy block (Aspen Plus) or into a Subflowsheet (Aspen HYSYS), and then just uncheck such Hierarchy/Subflowsheet sections from the Energy Analysis Scope.
How do I transfer several streams and e... |
Problem Statement: Back to basics: how to interpret matrix row and column nomenclature in PSCP? | Solution: In PSCP matrix file dialog, we can search column and row names to find the corresponding matrix structure.
LP matrix row and column names consist of a system-defined type identifier, concatenated with user-defined tags for materials, nodes, modes, & c. Each of these constituent parts is separated from the ot... |
Problem Statement: Why are the heat flow terms in my Pipe Segment not balanced? Is the energy balance satisfied? | Solution: In the Pipe Segment Worksheet tab, the energy flow of inlet stream, outlet stream, and energy stream (heat loss) can be viewed from the "Heat Flow" term. With the Pipe Segment as the control volume, this heat flow term should be balanced. But in some cases, users may find that the total inlet heat flow may no... |
Problem Statement: The Debugging feature in Microsoft VSTA 2017 will not work with Aspen Fidelis Reliability (AFR) V11 unless certain settings are configured in Visual Studio 2017. Instead, AFR V11 will crash when attempting to debug custom routines in VSTA. | Solution: Visual Studio 2017 requires a debug setting to be checked for the debug feature of user coding to work properly. Below are the steps required to ensure the debug setting is checked:
1. Click “Debug” from the Ribbon
2. Select “Options…”
3. Expand the “Debugging” section and select “General”
4. Locate t... |
Problem Statement: When trying to generate a report in Aspen Flare System Analyzer through File | Print, the following error comes up and Flare closes after hitting Cancel. | Solution: This message can indicate that the Aspen Flare System Analyzer file in use could be corrupted. The message specifically comes up when the user chooses to print the report for All Scenarios.
To fix the corruption on the file and allow AFSA to correctly generate the Print report, the user can re-generate the ... |
Problem Statement: What does double banked mean on a Plate Fin Heat Exchanger? How can I select that configuration? | Solution: Double banking occurs on a Plate Fin Exchanger when two adjacent layers of the same stream appear in a layer pattern, or whenever two hot stream layers or two cold stream layers occur together.
You have two options to define this configuration:
Specify a Fraction Double Banked for each layer (Exchanger Geom... |
Problem Statement: How to model a Wet Gas Compressor in Aspen HYSYS? | Solution: Aspen HYSYS allows the user to specify GMF (Gas Mass Fraction) or GVF (Gas Vapor Fraction) performance curve data for a single or multiple collections.
Note: The Wet Gas Compressor is only an operating mode, is not another unit operation.
To model a Wet Gas Compressor follow these steps:
1. On the Parameters... |
Problem Statement: When we use APS and open an excel file we cannot reload simulator because APS looks for the index/excel macros in the wrong excel file rather than in the Units file linked to APS.
If we do not have any other Excel file open we can reload simulator because APS can find the macros of the correlations, ... | Solution: The issue can be resolved by adding EXCEL_IGNORE_REMOTE_REQ keyword in the CONFIG table. Please set the value to "Y".
This way Excel files are open in different instances of Excel and do not interfere with APS Simulation and excel interaction. It prevents APS, MBO from accessing the incorrect workbook in t... |
Problem Statement: Example of hematite (Fe2O3) production from Iron chloride with HCl scrubbing | Solution: To simulate the process of hematite production, we will part from the reactions which form said component. We are going to obtain hematite from a couple of iron chlorides, which reactions are:
The solid hematite is separated, whilst the remaining HCl is cooled down and separated on an absorber column, wi... |
Problem Statement: Example of a User kinetic subroutine for RPlug | Solution: Attached is an example of a User kinetic subroutine for RPlug
It illustrates the use of IRRCHK, KFORMC, and VOLL calls, and the use of RATES vector.
This routine is a simple illustration of an Aspen Plus user-defined kinetic routine that can be used with any of the kinetic reactors (RCSTR, RPlug, or RBatch), ... |
Problem Statement: This solution outlines what may cause an Instrument alarm to display the error message below even though the analytic is already deployed. It will also discuss how you can prevent this error message from appearing in the future. | Solution: This error message occurs in a deployed model if Aspen Asset Analytics attempts to refresh the model with new rule history data where no rule history data exists. By default, Aspen Asset Analytics attempts to refresh rule history data every 5 minutes, so if the record associated with Instrument alarms does no... |
Problem Statement:
Known issue: Excel add-in runtime error in V11 and V10 | Solution:
A problem was found with the signing of Excel VSTO (.NET) add-ins. This problem affects add-ins used for Aspen Basic Engineering and Aspen Fidelis Reliability, V10 and V11.
The issue will be fixed with an emergency patch. In the mean time, here are the possibilities of what the user would see (depending o... |
Problem Statement: What is a hyFluid and how to use it? | Solution: A hyFluid object is derived from a single Process Material Stream and is an internal copy of a Process Material Stream (share many of the properties) that can be manipulated for property calculation purposes without interfering in the simulation.
To create a hyFluid from a Process Material Stream and use it ... |
Problem Statement: When using Oil and Gas Feed option in a stream, in the section of Gas-Oil Flash Calculation, pressure and temperature are specified for each stage as well as GOR and WOR information, and when observing the Stage GOR, it can be seen that the Total GOR is not the cumulative sum of each stage GOR. | Solution: GOR is the volumetric model flow ratio of gas and oil, while WOR is the volumetric flow ratio of water and oil. However, when more than one stage is selected, the calculations changes and are as follows:
The first stage is flashed at set conditions, then only liquid phase goes to next stage where now it is f... |
Problem Statement: As mentioned in the article What is a hyFluid and how to use it?, Aspen HYSYS allows the user to generate a copy of a Process Material Stream and evaluate different flash conditions but in some occasions after the user sets a new flash condition and retrieves a thermodynamic property it isn't updated... | Solution: Every time the user changes a flash condition (i.e. T, P or H) of a hyFluid object it must be reflash to retrieve the new thermodynamic properties at those new conditions as the Aspen HYSYS Engine doesn't do it automatically.
The following type of flashes can be done in a hyFluid:
For a Pressure-Vapor Fractio... |
Problem Statement: It is common that users compare thermodynamic models within Aspen HYSYS such as NRTL and General NRTL and observe that there are no real differences in VLE behavior of mixtures between both applications. | Solution: Aspen HYSYS has two different NRTL Fluid Packages, one is NRTL and the other is General NRTL, both models are the same NRTL model indeed:
The real differences lies in the parameters form and the options to calculate these parameters, NRTL model offers a limited unique option to calculate parameters, wherea... |
Problem Statement: How to Control Volumetric Amount of a Stream (or the Addition of Several Streams) in a Submodel of PIMS? | Solution: This question was asked frequently recently. A dummy capacity structure should be added to calculate this.
If you are in table ASSAYS and would like to control the total amount of a crude cut, here is what you should consider:
First go to table ASSAYS and add a dummy CCAPXXX structure. This is not a real cap... |
Problem Statement: How can I add streams in APEA? | Solution: After opening a project within Aspen Process Economic Analizer new streams can be developed. The user can develop completely new streams or use an existing stream as a base, this can be done either from the Project Basis View window or from the Process Flow Diagram. Both procedures are described below.
From ... |
Problem Statement: Why is MW difference observed across the KO drum? | Solution: Inside Aspen Flare System Analyzer KO Drums are used to allow liquid to separate from the feed stream so that it can be removed from the flare system. This block completely removes the liquid phase flow going into the separator feed from the upstream elements of the network, this is applied to the outlets of ... |
Problem Statement: If a user does not have access to SQL server db, how could an APS user differentiate between active and inactive crudes? | Solution: The solution to this question needs us to understand the similarities and differences between CRUDES, CRUPROPS, and CRUDCUTX tables.
The user could still view the data in results tables from “Table View” in APS. For table CRUDES, by design, it shows the records from APS memory. APS does not load inactive cru... |
Problem Statement: In occasions it is necessary sending some properties from all the streams in a Aspen HYSYS simulation to ASW and linking each property of each stream in ASW can take much time. | Solution: In Aspen HYSYS, in Home tab there is an option called Model Summary Grid, which displays some properties of all the streams in the simulation in a template table, it also can display results from unit operations, feed and product streams.
The template can be modified according to the properties that the us... |
Problem Statement: What is the Relationship Among Tables CRUDES, CRDCUTX, and CRDPROPS and How do They Work Together in APS? | Solution: The above question needs to be answered when the user would like to activate or deactivate a crude in APS. In the current functionality, if the user is not the admin of the SQL server db of the model, then the user cannot directly activate a crude. The db admin needs to do that part. However, from V12 onwards... |
Problem Statement: How to manually upgrade Aspen Report Writer to a newer version? | Solution: To manually upgrade Aspen Report Writer to a newer version, users may first get AspenRpt.dll and AspenRpt.xla(m) files of newer versions and follow steps below to properly set up Report Writer.
1. Place new version AspenRpt.dll in C:\Program Files (x86)\Common Files\AspenTech Shared.
Place AspenRpt.xla(m) in... |
Problem Statement: Is CIM-IO communication possible through a firewall?
Installation of firewall: What ports are used for communication between Aspen InfoPlus.21 and Aspen CIM-IO server?
What ports are used for communication between Aspen InfoPlus.21 and Aspen CIM-IO Redundancy (Primary and Secondary) systems communica... | Solution: Yes, CIM-IO communication is possible through a firewall. The ports assigned to Aspen CIM-IO processes On the Cim-IO Interface server are used to tranfer data between the Cim-IO client and server.
What ports are used for communication between Aspen InfoPlus..21 and Aspen CIM-IO server?
Aspen CIM-IO client tas... |
Problem Statement: In our refinery usually we send products to a ship from two or three different tanks. For us it is important to target the qualities in the ship, even if one or more tanks are off spec or in give away.
The function Blend Groups in MBO it seems to target Hdr combine quality, but we have to consider co... | Solution: Attached model (use case WA) demonstrates approach helping customer to set blend group (for U87 from T87A and T87B) considering tank heels also.
The main idea is as follows:
Define a tank representing the ship (SHIP)
Define virtual tanks for each product tank (VT and VT2) that can send product to the ship
Def... |
Problem Statement: Detailed guide is needed to configure clustering in PIMS V10 | Solution: There are some KB articles available for cluster configuration in PIMS like:
How to configure machines for cluster processing of Aspen PIMS
How to define nodes for Aspen PIMS-AO cluster processing
Here you can find more comprehensive guide, which is applicable for V10 and later versions.
Attached document ha... |
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