question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Why is there a difference between the Standard Gas Flow and the Molar Flow in MMSCFD? | Solution: In Aspen HYSYS, all flows are stored in kgmole/s (what we call Internal Units) and converted to the flows displayed on the screen.
If you ask to see your molar flow in MMSCFD or m3/day(gas), the flow is converted using a pre-defined conversion factor that is hard coded into the program. This conversion fact... |
Problem Statement: How do I reset my APS user registry settings? | Solution: Sometimes, there could be some issues with APS (mostly cosmetic issues like dialog box size/Gantt Screen Display changes etc). These can be reset by clearing out the following folder(s) from the user’s registry:
Close any existing APS instances
Open registry editor
Navigate to the following path: HKEY_CURRENT... |
Problem Statement: Should I Use Improve Local | Solution: , Epsilon, or Both?
Solution
In PIMS-AO there are two settings available which are similar: “Improve LocalSolution” and “Epsilon”. Both these algorithms are designed to prevent sub-optimal results caused by the tendency of the optimizer to leave pools which are initialized with zero flow at the rate of zero ... |
Problem Statement: Why cannot I set NIST binary databanks as Selected databanks? | Solution: When opening File|Options| Properties Basis table, I selected NIST binary databanks into Searched column.
However, the NIST binary databanks are still not used when I am using an activity coefficient method. Why does this happen?
NIST binary databanks, NIST-RK, NIST-IG, and NIST-HOC, are only on Available... |
Problem Statement: When launching Aspen SCM, AspenTech Application Exception Message occurs. | Solution: To resolve the error, follow the below steps:
Go to C:\Users\*UserName*\AppData\Local\Aspen_Technology_Inc\AspenTech.SCM.UI.Shell.ex_Url_pxzmw32phcfzwpquginyos4jnepf24fk\21.0.2.0
Delete user.config file
Open SCM. Error should not appear now.
If the above procedure fails to solve the issue, follow the steps b... |
Problem Statement: How can I speed up the loading time of very large case tables? | Solution: In Aspen PIMS V11, there is a new feature that can speed up the loading of large case tables. The option is located on the Reporting | Miscellaneous tab at the very bottom. When selected, PIMS will skip the processing required to generate the W500 warnings related to the case table. W500 is the warning tha... |
Problem Statement: What Is The Enthalpy | Solution: HYSIM and HYSYS use different reference basis for enthalpy (H) calculation. In HYSIM, H=0 at 0 K and 1 atm (ideal vapour); in HYSYS H=heat of formation at 25 øC and 1 atm (ideal gas). For example, if the heat of formation is 1000 kJ/kgmole, the enthalpy at 25 øC is 1000 kJ/kgmole.
For a liquid water stream ... |
Problem Statement: Using Aspen HYSYS Dynamics with Columns | Solution: Columns are an essential part of most processes. Columns can have many variables that rapidly change during plant operation. Utilizing Aspen HYSYS Dynamics, users can set up models to view and control the dynamic response of columns.
Please click the links above to download the Jump Start Guide and example ... |
Problem Statement: Structure related to table PROCLIM can not be applied directly in table ASSAYS, i.e. you can not write ZLIMTAG or ZQQQTAG rows in table ASSAYS as they are not recognized by Aspen PIMS.
What is the work around to use table PROCLIM to control properties in crudes? | Solution: To apply limits using PROCLIM to the crudes mixture going to the crude units you need to do the following:
Define them as deferred cuts in table CRDCUTS (in volume and/or mass, as required)
Define relevant properties in table ASSAYS and recurse on them defining them in PGUESS
Create PROCLIM structure in a dum... |
Problem Statement: Simple Heater Unit Operation Extension in C#. | Solution: The attached example illustrates how to create unit operations extension in Aspen HYSYS. The model handles backward and forward calculations and allows for multiple specification sets for flash calculations. Pressure drop in the unit is mandatory so flash calculations are pressure explicit. Duty is optional, ... |
Problem Statement: How can a user customize the generation of pseudocomponents in the petroleum characteriztion input formin the petroleum characterization form? | Solution: Quite often the default settings in Aspen Plus will suffice to model petroleum assays in flowsheet simulations. Typically, based on the distillation data provided by the user, a working TBP curve is generated by Aspen Plus engine and the fractions of pseudocomponents are optimized to provide a close match wit... |
Problem Statement: This | Solution: provides an Aspen SQLplus query to return all the references to a manually-entered tag name in the Aspen InfoPlus.21 database.Solution
procedure findchar24 (char24 char(24), qname record)
local i,j,k int;
local c char(80);
j =(select #QUERY_LINES from QueryDef where name = qname);
fo... |
Problem Statement: Are there any plans to match the SI units set in Aspen Plus to the standard SI? | Solution: The SI units in Aspen Plus use the following units of measure:
Length is in meters
Mass is in kilograms
Time is in seconds
Moles are in kgmol
Combinations of the above units are used for all other derived units.
In the SI units set in Aspen Plus or Aspen Properties, molar properties are defined using kmoles... |
Problem Statement: How do I create and distribute a unit set to be used by others? | Solution: You can create your own customized units sets and distribute it to others by creating a template. Create a new simulation case using General with Metric or English units templates depending on your needs. Then, go to Unit sets at top under Home ribbon and create New . Then, modify the units as desired.
Â
Onc... |
Problem Statement: It is possible to publish standard Process Explorer plots to aspenONE Process Explorer.
This Knowledge Base article shows how it is done. | Solution: · In Aspen Process Explorer click the Tools tab
· Select Plot Utility icon in the Ribbon
· Plot Utility dialog box opens
· Define File or Folder path to where your Process Explorer plot files are saved
· Define the Destination path – Public or Private
· Click Export X... |
Problem Statement: What is the use of table _BIASRESULTS in APS? | Solution: This table contains the biased and unbiased simulation results for a stream property. The following are the steps on how to configure and work with this table:
1. Add a keyword PUB_BIAS_RESULTS in CONFIG table, and set it as Y;
2. Set scheduled bias for any stream property in screen “Simulator \ Schedule Prop... |
Problem Statement: This Knowledge Base article shows how to resolve the following CIMIO timeout errors that occur when DCOM configuration is used.
CIMIO_USR_GET_RECEIVE, Error receiving a GET reply from device
CIMIO_MSG_RECV_TIMEOUT, Time-out trying to receive a message | Solution: There should be a user account on the OPC server machine which has the same name and password as the user account which started the OPC client (Asyncdlgp.exe). User name and/or password mismatch causes the above error.
To fix this problem, create or modify a user account on the on the OPC server to match the ... |
Problem Statement: How will PIMS calculate property values of blended crude defined in table CRDBLEND while in Table ASSAYS, property values are entered for this blended crude? | Solution: CRDBLEND table is used to create a new crude from a blend of one or more crudes. PIMS will calculate the property values for the new blended crude linearly based on the fractions of the component crudes entered in table CRDBLEND, even if properties for the new blended crude are also defined in the ASSAYS tab... |
Problem Statement: Known Issue: In which case does the “Do not allow overlapping crude run events” setting fail?
CQ00769845 | Solution: There is a setting called “Do Not Allow Overlapping Crude Run Events” in Model Settings-> Advanced. As it states, it prevents the overlap of crude run events against a crude unit. However, I noticed that even though I had this setting checked ON, my crude run events could overlap. What could be the reason?
... |
Problem Statement: I have this parameter unit which tracks cut points of my process unit. What are the different methods by which I can change them? | Solution: Method 1: Using the Gantt Screen and Unit Operation Event
Add PM1 to the corresponding event screen’s control variable list
2. Add a unit operation event on PM1, and change the cut points as per the time stamp
Method 2: Using Excel Units Workbook
The only challenge with this approach is to make sure the b... |
Problem Statement: How do I seclude the APS excel instance as a separate instance? | Solution: APS, as already known, always opens with an excel instance. If you open the excel units workbook when APS is open, the title bar will say Excel for APS as per the following screenshot
In v8.8 and above, any external excel files opened will also be tied to the excel for APS (by default)
For example, if the us... |
Problem Statement: Why am I unable to run a distillation column without a condenser?
There is a Completion Status message: Feed (or pumparound stream) to the top stage must be specified when Condenser=None or Condenser Duty=0 (Specifications | Setup | Configuration sheet) | Solution: If there is no condenser and no liquid stream to a column top, the top stage will dry up, which is not allowed in RadFrac. Either a liquid feed stream in stage 1 or a pumparound to the same stage is a required input for the model.
If you define a liquid feed stream on the top stage of the column, remember to... |
Problem Statement: How does HYSYS calculate the Enthalpy of a stream? | Solution: The enthalpy reference state used in HYSYS is the heat of formation of an ideal gas at 25 C. You can view this value in the Basis Environment, Point tab page of a pure component as Heat of Form (25 C). For a stream made up of multiple components, the reference state will be the sum of the individual heats of ... |
Problem Statement: How to Create a Memory Dump for 32bit AspenTech Applications | Solution: Step 1.
For Orion, MBO and Olefins, you may see a dialog showing the reason why the application is crashing. Press the PrtScn key to caputure a screen shot to record this information, and the application window.
Click on OK, and you will see the following window. For some other applications, you do not see t... |
Problem Statement: What is the significance of Time Period Settings in an APS/MBO model? | Solution: APS will calculate material/property balances at every time period that it creates. With more time periods, there are more balance equations, and therefore more detail. However, more periods have a negative impact on simulation speed. The challenge is to leverage the amount of detail and the simulation speed.... |
Problem Statement: Is it possible or advisable to run two different versions of APS/MBO against the same DSN? | Solution: This scenario will not be possible if:
- One of the two versions are after v8.7, and the other version is before 8.7 AND
- The model has pipelines
If the model does not have pipelines, an APS/MBO database is backward compatible (meaning a v9 database can be opened successfully in v7)
Though from the databas... |
Problem Statement: An error is received after selecting the Test Connection button on the AFW Security - Configure Data Source screen
The main screen displays the status:
Error number: 80040e4d
Authentication failed. | Solution: AFWDB data source missing. Please create it manually.
1. Go to ODBC Data Source Administrator(32-bit)
2. Click on System DSN tab
3. Click on “Add” button to create new data source
4. Select Microsoft Access Driver(*.mdb) and click on “Finish” button.
5. Type a Data Source Name, i.e. AFWDB
6.Click ... |
Problem Statement: A user does not wish to display certain stream components in the Composition page of the Workbook. However, if these columns are deleted, the calculated compositions for all other components appear as <empty>. | Solution: If the user chooses to delete a stream column in the Compositions page of the Workbook, This will be deleted in the main flowsheet Thus, the flowsheet will be unable to solve completely. This is not a defect, but the way the Workbook is implemented.
User should select the option ‘Hide object’ instead. This m... |
Problem Statement: How do I model pipeline pressure surge analysis using Aspen HYSYS | Solution: 1. The Pipe Segment model (part of standard HYSYS) has a slug analysis section on the Flow Assurance tab. This capability will analyze the potential flow conditions (flow, pressure drop, amounts of liquid and vapor, elevation changes) and predict if slugging could occur and how big the slugs may be.
2. ... |
Problem Statement: A customer is developing a custom portal view with all the input boxes and display elements of a standard aspenONE Process Explorer plot hidden except for the trend plot itself once called.
This knowledge base article shows how to format a URL that will hide different display elements of A1PE plot an... | Solution: aspenONE Process Explorer supports the following URL settings/switches:
ShowLegend=0 or 1 (no or “yes”)
ShowTimeline
ShowChart
ShowTagInput
Below is a usage example that will display only the following trend plot: A1113D.appid-1.pt-1.cat-1.def-0.s-a.xml
http://localhost/ProcessExplorer/WebControls/PBPlots.a... |
Problem Statement: Couldn’t be able to run the PIMS model under Chinese character folder with the following error: | Solution: Problem could be resolved in the following way:
1.Change the system locale to Chinese on the Administrative tab. Then restart the machine.
2.Set the Format to Chinese on the Format tab.
Both DR and AO would be able to read the Excel tables from PIMS model with Chinese character, and the Chinese characters w... |
Problem Statement: How do I regress Activity Coefficient data? | Solution: In this example, NRTL will be used as the base property method. Two components were selected for which the database does not contain binary interaction parameters. They were chosen arbitrarily to illustrate the results of this exercise.
The first step is to create a mixture Data Set and input the Activity ... |
Problem Statement: When using a Data fit block, how would you deal with the situation where one of the Input variables is a spec variable in a Design- specification? | Solution: If an input variable is the spec in a design specification, you will need to switch the Input/Result label in the Data Fit. In the attach example, a heat exchanger block is used to regress the value of the
Keywords: regression fit design-spec target goal manipulated
References: Heat transfer coefficient (U-RE... |
Problem Statement: When a simulation file that includes a Excel calculator block is saved as a *.bkp file, another embedded file will be generated (*.apmbd). When a special character such as ä, ö or similar, are present in the path where the file is located (for example: C:\Users\mayordom\Desktop\Temporär), the softwar... | Solution: ID 144587). Thus, the following error message is displayed:Solution
Avoid the use of special characters in the file name or any folder included in the path. If the file is saved as a document file *.apw or as a compound file *.apwz, then the error is not reproducible as the embedded file is not created separa... |
Problem Statement: This article discusses how to configure InfoPlus.21 to use OPC server time stamp for get records. | Solution: User can follow below manual steps to change existing records in case IP.21 server time is used for IO time stamp by default.
1, In InfoPlus.21 Administrator, Cim-IO, IO_Timestamp_SRC, we can specify whether timestamp comes from Cimio Client (IP.21 server), or Cimio Server.
2, User will need choose from ‘Ci... |
Problem Statement: The default pump unit operation in Aspen HYSYS is based on a centrifugal pump. In the industrial environment, reciprocating pumps are used in many cases. So, how can reciprocating pumps be simulated using Aspen HYSYS? | Solution: Aspen HYSYS does not differentiate between centrifugal or reciprocating pump during simulation when calculating theoretical power requirement. You can supply a Q vs H as a vertical line as Q is independent of the required pump head in case of reciprocating pump simulation. Note that Aspen HYSYS has more flexi... |
Problem Statement: This article provides you a way to display current time in a Graphic designed by Aspen Process Graphic Editor. You can adjust the timestamp format by changing the SQLplus query if needed. | Solution: 1- Go to Aspen SQLplus, Create a query
WRITE CAST(CURRENT_TIMESTAMP AS CHAR FORMAT 'DD-MON-YY HH:MI:SS')
2- Click on the Menu Record | Save As...
3- Type a name such as My_Clock , select QueryDef, click on Create
Select TSK_IQ1, click on OK
4- Go to Infoplus.21 Administrator, search for the record My_Cloc... |
Problem Statement: How do I enable Extrapolate for Aspen Calc calculations' parameter using an Aspen InfoPlus.21 query? | Solution: In Aspen SQLPlus, use View /
Keywords: Aspen Calc
Aspen SQLPlus
Extrapolate
References: s... menu option to add references to the CalcScheduler and Aspen Calc Components:
Click on the Ok button and copy the following code into the query writer:
LOCAL CALCCMD, CALCNAME, CALCULATION, FOLDERNAME,GROUPNAME, APA... |
Problem Statement: How can I quickly create a new SQL database for PIMS results? | Solution: In Aspen PIMS V11, there is a new feature that allows users to perform many tasks related to their SQL database. The new feature can be accessed within PIMS by going to TOOLS | SQL Server Management Tool as shown below.
To create a new SQL database simply click on the + icon.
In the Database Name window, t... |
Problem Statement: When starting the aspenOne Process Explorer, the following error message may sometimes appear:
The file Templates/Basic/Trend no longer exists. If it is in your home page preferences or as a Tile then please update those settings.
How can this be resolved? | Solution: This issue is caused by the Trend plot template missing or corrupted. Download the attached trend plot template and paste it into the following directory: C:\ProgramData\AspenTech\A1PE\Files\Templates\Basic . This will overwrite the damaged or corrupted template and resolve the issue.
The name of the Trend... |
Problem Statement: How can I perform an isentropic flash in the V-L region? | Solution: A Design Spec block can be used to vary the temperature of a stream to achieve a desired entropy (or keep entropy constant). However, this will not work for all cases.
Consider you are working with a pure component (rather than a mixture) and the desired entropy lies inside the V-L region. For pure component... |
Problem Statement: How to regress PSRK parameters from Liquid Vapor Pressure data. | Solution: In general for Equation of State methods, the model specific critical constants and ideal gas heat capacity (CPIG) parameters can be regressed to fit pure component data. The pure component behavior and parameter requirements used by the PSRK method are described in the help topic Aspen Plus
Keywords: PSRK, ... |
Problem Statement: How to Unmatch Imported Events from Existing Events? | Solution: This Tech Tip explains what does it mean to unmatch internal events from existing events, what tables are involved in this process and what is the recommended workflow to use Application ID.
When you unmatch an internal event from an imported event, you are actually deleting the values in columns MOVEMENT_I... |
Problem Statement: When using electrolytes is GAMMA on a mole fraction or on a molality basis? | Solution: There are a few prop-set properties that report activity coefficient for an electrolyte mixture.
GMTRUE is the Activity coefficient of a true species (molality scale)
GXTRUE is the Activity coefficient of a true species (mole fraction scale)
GAMMA is the Activity coefficient of a species (mole fraction scale)... |
Problem Statement: Can I run Multi-Start in a Multi-Plant Model? | Solution: This Tech Tip gives a brief description of how to run Multi-Start Analysis in Multi-Plant Models.
Multi-Start is one of the different methods of comparison of Global Optimization and is one of the feature available in the Aspen PIMS Advanced Optimization package (PIMS-AO), it is available for Multi-Plant mo... |
Problem Statement: aspenONE Alerts is a web application that provides an easy way to subscribe to the alarm states of various tags. When the tag reaches that alarm state, it will be added to the Alerts page in aspenONE Process Explorer, allowing for easy monitoring.
When e-mail alerts are enabled for an alert subscript... | Solution: To designate a phone number for alert subscriptions:
From the Alerts application, click the envelope icon on the aBar. The Alert Subscription dialog box opens.
In the E-mail box enter the phone number syntax instead of the user's email address. An example of such a syntax is shown below. (Note: The syntax wil... |
Problem Statement: Would like a list of all Standard CIMIO Interfaces(Sold by AspenTech and supported by Aspen Tech Support). | Solution: Standard CIM-IO Interfaces (Effective July 1th 2006).
*** IMPORTANT NOTICE ****
This list contains standard interfaces, in the sense that they are sold by Aspen and supported by our support team.
CIM-IO FOR DOW MOD DCS via MIF is no longer supported a supported Interface and is no longer included in this list... |
Problem Statement: How do I resolve the error when Excel does not load COM Add-ins, even after they have been enabled? | Solution: Check the registry key:
HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\ AspenTech.PME.ExcelAddin.Process Data\LoadBehavior
It should be set to 0x0000003(3). This directs Excel to load the Add-Ins when starting. If it is not then change it to a value of 3.
If this does not resolve the problem then to... |
Problem Statement: What is the difference between static pressure and total pressure? | Solution: Starting with version 3.0 of FLARENET, the static pressure is shown by default rather than velocity (dynamic) pressure or total pressure. If you select the Display total pressure check box on the General tab of the Preferences Editor, the total pressure is displayed instead.
Static pressure (Ps) is the pre... |
Problem Statement: How can I manage the cases in my Aspen PIMS SQL database? | Solution: In Aspen PIMS V11, there is a new feature that allows users to perform many tasks related to their SQL database. The new feature can be accessed within PIMS by going to TOOLS | SQL Server Management Tool as shown below.
When the SQL Database Management Tool opens, make sure you are displaying the desired da... |
Problem Statement: Overview of Firewall security, Antivirus scanning and Windows permission requirements for APC Products | Solution: Follow our permission checklist to make sure machines and networks are configured with required permissions.
Windows Permission requirement
APC Server applications requires service account during installation. This service account needs to have local and domain administrative privileges.
Aspen Process Contro... |
Problem Statement: Aspen Tag Browser on a workstation gives error No data sources found. Please check ADSA configuration and it won't show any servers, while the Aspen Process Explorer and the Process Data Add-in work fine along with the ADSA test. | Solution: The issue occurs when the user has configured the Aspen Tag Browser to connect through the MES Web Server.
You can fix this in Aspen Tag Browser | View | Options | MES Web Server, and uncheck the Use MES Web Server option. The error message will disappear after you uncheck the option.
Keywords: Configuration
... |
Problem Statement: What is the time span (t1 and t2) meaning in the aspenOne Process Explorer (V11) page saving URL?
In the aspenOne Process Explorer V11, after we saved a trend/plot, we are able to copy the URL of the trend/plot and share it to the A1PE in the other machines.
Here is a sample of the saved URL: http:... | Solution: The time span t1 and t2 in the aspenOne Process Explorer page saving URL is the Unix Epoch Time.
For the URL sample above:
t1=1567696324794 = Thursday, September 5, 2019 10:12:04.794 AM GMT-05:00 DST
t2=1567703524794 = Thursday, September 5, 2019 12:12:04.794 PM GMT-05:00 DST
Here is a link you could conve... |
Problem Statement: What is the best way to control the composition or quality of a recursed pool? | Solution: In the past some have used the PIMS blending tables to setup and control the properties of a pool such as a reformer feed pool. While this is possible, it is not ideal. The best way to control properties of a recursed pool, is to create the recursed pool in a submodel and use Process Limits (defined in Tabl... |
Problem Statement: How do I suppress the message box: Do you want to save changes to Units.xls? | Solution: There is a setting keyword DO_NOT_SAVE_EXCEL that can be used in the CONFIG table, with a value of Y.
This keyword can be used for both APS and MBO.
From the next launch, APS/MBO will suppress the excel save dialog prompt while closing the software.
Keywords: None
References: None |
Problem Statement: How do I use the Spot Crude Evaluation feature in PIMS Assay Management? | Solution: 1. Start Assay Manager
2. Click on the Spot Crude Evaluation button on the ribbon
3. Find and select the desired crude, then click on “Use Selected Assay”
4. On the “Setup Evaluation” tab fill in the appropriate data. Typically, we would use case 1 (Base Case) for the reference case and run t... |
Problem Statement: There are so many parameters used in UNIQUAC activity coefficient model in Aspen Plus. How should I understand them, and how does Aspen Properties regress these coefficients? | Solution: Aspen uses the normal UNIQUAC equation:
Where
Although this UNIQUAC equation looks a little complex, it only has 2 adjustable parameters: τij and τji. They are the binary interaction coefficients, and are dependent of temperature. In real simulations, only τij and τji need to be regressed using experimen... |
Problem Statement: This Knowledge Base article shows how to delete a graphic or a trend published to aspenONE Process Explorer. | Solution: Before MES V9.0
When a graphic or a trend is published to aspenONE Process Explorer, it appears in the Menu Tree but there is no obvious way to delete it from the tree as there is no recycle bin to drag it to or a context menu with the Delete option.
The proper way to delete a graphic or a trend from the asp... |
Problem Statement: It is not always known which Aspen Manufacturing Suite Applications are eligible to have security set in the AFW Security Manager.
Nor is it easy to locate the respective XML files to be imported into the AFW Security Manager. | Solution: Here is the list of Aspen Manufacturing Suite applications eligible to have security set in the AFW Security Manager. Also included is the default location for each XML file:
Process Explorer: C:\Program Files (x86)\AspenTech\APEx\Pe\pe.xml
Process Graphics Editor: C:\Program Files (x86)\AspenTech\APEx\GE\gra... |
Problem Statement: This Knowledge Base article shows how to change the timeline span from within the graphic and be able to get, as variables, the beginning and end timelines. | Solution: In order to be able to change the timeline span from within the graphic, the following java script functions were added to the aspenONE Process Explorer (a1PE) graphics page and are now supported in graphic script actions for a1PE:
setTimeWindow(millisec_T1, millisec_T2)
Description:
The setTimeWindow() meth... |
Problem Statement: Is it possible to simulate the pyrolysis of high density polyethylene (HDPE)? What thermodynamic model should be used? | Solution: Attached is a model of HDPE pyrolysis in Aspen Plus.
Open a new file and start with polymer template.
Add PC-SAFT to the database on the Components | Specifications | Enterprise Database sheet.
Specify HDPE to have a type of oligomer and ETHYLENE-R as segment on the Components | Specifications | Selection she... |
Problem Statement: I can't delete pipeline route from APS. There is a message: At least one entity (Inv 25549) has used this route thus it cannot be deleted now. | Solution: Routes without any pipeline events can be deleted. If a route has been used by other entities, it should not be deleted and you should get the following message:
To delete a pipeline Route, you can use the following script:
Delete FROM [DBNAME].[dbo].[PLINV_DEST] where PLINV_XSEQ in (SELECT [X_SEQ] from ... |
Problem Statement: How do I make sure the SQL Database Management Tool is showing the most current data in my database? | Solution: In Aspen PIMS V11, there is a new feature that allows users to perform many tasks related to their SQL database. The new feature can be accessed within PIMS by going to TOOLS | SQL Server Management Tool as shown below.
If this tool is open while you are executing more PIMS runs, the screen data may need to... |
Problem Statement: what is the rules of generating Cable trays for Electrical cable and Instrumentation cable? | Solution: Cable tray type can be selected at area and/or project level. If you don't set the tray length, ACCE system will create E&I cable tray lengths equal to the distances from the area to the motor control and control centers. If the number of runs to the centers require more than one tray, the system will genera... |
Problem Statement: How to add and customize a stream properties table on the PFD? | Solution: The attached pdf document illustrates how to customize the workbook. The attached HYSYS file (openable in V8.8 or later) is used to generate the illustrations.
Keywords: Stream, Table, Worksheet, Workbook, Properties, Variables, sort, hide, display, reveal
References: None |
Problem Statement: How to model a simple reactor for biomass digestion without knowing specific reactions sets and kinetics.
In this situation, when you are building a larger model of installation using biomass combustion products and you don't want to concentrate on complex digestion process, you can simplify that par... | Solution: In order to model a simple reactor for biomass combustor, you will need to have data to specify the composition of inlet and outlet stream and properties of biomass (for example laboratory analysis results).
This example is based on the Solids Getting Started Example. This example uses COAL; however, the Ult... |
Problem Statement: How can I automate pump or compressor shutdown during HYSYS dynamic simulation? | Solution: In the attached case Shut down pumps AT.hsc, a spreadsheet Pump control is included which acts as an On/Off switch for each of the two pumps, P-100 and P-101. If a value of 0 is entered in cell B1 or B2, it will shut down pump P-100 or P-101, respectively, via the output from C1 or C2.. To start it up again, ... |
Problem Statement: Occasionally, users have issues when exporting tag data from aspenONE Process Explorer (A1PE) to a CSV file and then importing the CSV file into MS Excel.
This Knowledge Base article shows how to properly import A1PE generated CSV files into Excel. | Solution: Here are the steps to properly import A1PE generated CSV files into Excel:
1. In aspenONE Process Explorer click the Export to CSV icon
2. When prompted by the Internet Browser to open or save the CSV file, choose to save it
3. Next, in MS Excel, click From Text in the Excel Data tab, browse to ... |
Problem Statement: How viscosity of multiple polymer component mixture is handled by Van Krevelen model? | Solution: In Aspen polymer, the van Krevelen binary polymerSolution viscosity model treats a multicomponent polymer mixture as a quasi-binary system consisting of a pseudo-polymer component and a pseudo-solvent component. It takes the average of properties of polymer species and solvent species, respectively.
Pseudo-po... |
Problem Statement: How to view the equations and coefficients used in Aspen Inferential Quality files, in case of working with an old/ previous IQF or IQM file? | Solution: The inferential sensing application is used to infer the value of a critical process variable or product property, from the values of other process variables and their relationships, which are continuously measured.
This inference yields a model whose corresponding stream of data values simulates the expected... |
Problem Statement: This Knowledge Base Article answers the following question:
Can existing Process Graphics that have links to other displays and files on the network (such as Excel files) be published to aspenONE Process Explorer and maintain this linking functionality? | Solution: Currently this is a manual process - neither Aspen IP.21 Process Browser Graphic Studio nor Aspen Process Explorer Graphics Editor will publish Excel files to the web server based on links in a graphic.
The Excel files must be manually copied to the desired destination on the web server, such as
C:\ProgramDat... |
Problem Statement: How to input NC Solid stream component attributes? | Solution: For a Non-conventional Solid stream, following Component Attributes are mandatory & should be consistent with each other:
PROXANAL
ULTANAL
SULFANAL
PROXANAL:
Enter the component attribute for the solid component in NC Solid stream as weight % on a dry basis, except for moisture. PROXANAL values for FC, VM and... |
Problem Statement: How to apply the ABML correlation for a submodel stream. | Solution: ABML is applicable to BLENDS property only, not for submodel stream property. If you want to also use the ABML correlation for a submodel stream property, then you need to introduce the Table AMBLSUBF.
Use table ABMLSUBF to invoke ABML correlations that convert properties “created” in a submodel table (SXXX) ... |
Problem Statement: When cimio_msg.log reaches 1 mb, the log file is copied to cimio_msg_backup.log, and a new version cimio_msg.log is created. This process is repeated each time the log file reaches 1 mb, and the previous log file is lost.
How to collect more information in the log file if needed? | Solution: The size of the log can be configured using the following settings.
Open the Cim-IO Interface Manager and select Cim-IO Interfaces, or
the Cim-IO IP21 Connection Manager and select Cim-IO Connections.
Edit the field Max log size (Mb) to set the desired log size.
You must restart the CIM-IO Client and/or Serv... |
Problem Statement: In short, what are the steps to be using the ‘new’ pipeline functionality in APS, post v8.7? | Solution: The following steps summarize how to use the new pipeline functionality in versions 8.7 and above:
Note: If you have pipelines in your existing model, you will be forced to go through the following steps by the DBUpdate tool
Define Locations (Model-> Pipeline -> Location)
Assign Tanks at locations (Optional ... |
Problem Statement: Can I set a time limit on my Aspen PIMS runs? | Solution: In PIMS-AO there is an option to set time limits on individual cases of a multicase run. This is available in the model settings under Non-Linear Model (XNLP) | General tab as shown below.
When this is activated, PIMS will stop any individual case whose optimization time exceeds the specified limit.
Keyword... |
Problem Statement: APS Error “compile error the variable is not defined” | Solution: When selecting edit in excel, the error appears “compile error the variable is not defined”.
Please follow the steps below to fix the problem.
Open Excel file (any file is fine)
Press Alt + F11 key Microsoft Visual Basic for Applications is launched.
Go to the menu [Tool] –[Option]
Select the option “Require... |
Problem Statement: How to add penalties to OBJFN from Non-Linear Equations? | Solution: In some scenarios, we may want to add penalties for capacity and process limits when it reaches certain thresholds. There are multiple ways to add penalties to OBJFN row and non-linear equation dialog has the function to add penalties.
Let’s take capacity threshold penalty for an instance. Firstly, one new pe... |
Problem Statement: Is there any way to use a different mix of nitrogen and oxygen, or even include other inerts like oxygen or argon inside the FCC? | Solution: Currently when the user works with the FCC, the composition for the air is fixed (79% N2 and 21% O2). The only way to change this is through the EO variables (AIRPLTP.BLK.DRYAIR_N2_MOLPCT and AIRPLTP.BLK.DRYAIR_O2_MOLPCT) corresponding to those, since those are currently connected to Aspen HYSYS otherwise.
A... |
Problem Statement: How is the LHSV (liquid hourly space velocity) calculated for Hydrocracker Reactor in Aspen HYSYS Refining? | Solution: LHSV for Hydrocracker Reactor is calculated as follows:
LHSV = Feed Volumetric Rate/Total Catalyst Volume.
Where, Feed Volumetric Rate is user specified the flow rate and Total Catalyst Volume is calculated from the user specified deails for the the catalyst weight, catalyst density and void fraction for eac... |
Problem Statement: How is Enthalpy calculated in Aspen Plus? | Solution: The enthalpy of a compound at a given temperature and pressure is calculated as the sum of the following three quantities:
DHFORM: This is the Ideal Gas Heat of Formation and refers to the enthalpy change involved in reacting the elements at 298.15 K and 1 atm at their reference state (vapor, liquid or so... |
Problem Statement: How can I create a new user-defined unit from APS flowsheet? | Solution: We can directly create a new user-defined unit in APS flowsheet. The unit information will be saved to database tables.
By clicking Update Excel, the corresponding excel spreadsheet will be generated in the Units workbook.
Keywords: None
References: None |
Problem Statement: How do I enable HTML reports with frames in PIMS? | Solution: To enable the frame in the HTML reports, using which you can easily navigate through the different sections of the report, follow the below steps:
Go to Tools-> Program Options-> Report tab and check the “Launch HTML reports with Frames” option. When you run the model after doing this, the report will launch ... |
Problem Statement: Aspen PIMS will handle one additive for each specification blend. There may be scenarios when multiple additives are required. | Solution: Special thanks are extended to Sr. Rodrigo Favela of Pemex who authored this paper for the 1995 PIMS User's Conference in Florence, Italy. There are situations that may exist where a client model requires more than one additive in a specification blend. PIMS currently only allows for one additive, therefore, ... |
Problem Statement: The Aspen Physical Property System has several submodels for calculating vapor pressure of a liquid. Antoine vapor pressure model is one of them. Is there any easy way to get Antoine equation constants of pure component from Aspen Plus? | Solution: In Aspen Plus, the equation for the extended Antoine vapor pressure model is illustrated in Help manual (screen shot showed in figure 1). In this equation, nine parameters are used and called PLXANT. First seven parameters are equation constants and last two parameters are temperature bounds.
Figure 1. Exte... |
Problem Statement: How to use Dirty-Water option to simplify the phase calculations | Solution: In applications where the hydrocarbon solubility in the water phase is of great concern (such as in an environmental study), you can use the Dirty-Water method to calculate the valid phases. Dirty-water calculation uses special methods to compute the solubility of organic compounds in the water phase. It’s al... |
Problem Statement: Which property packages can be used to model rate based columns in Aspen HYSYS? | Solution: In Aspen HYSYS, Aspen Rate-Based Distillation can be used to model columns when one of the following property packages is selected in your case:
Acid Gas - Chemical Solvents
Acid Gas - Liquid Treating
Extended NRTL
Keywords: Rate Based Column
References: None |
Problem Statement: Are there any Excel templates to extract data from Excel to Aspen Energy Analyzer? | Solution: You can use specifically formatted excel spreadsheets to import stream information, or complete heat exchanger network designs with splitters and utility heat exchangers, into an Aspen Energy Analyzer case.
You can find empty templates for these data transfer formats as well as complete examples of each type ... |
Problem Statement: Through the | Solution: article (KB 000025309: How do you enter Fisher data for a control valve?), user knows the possibility of customizing Aspen Plus User Interface so that additional series of valve data information can be added into the library of Aspen Plus Valve block. However, the steps described in KB 000025309 is not so cle... |
Problem Statement: If the user is using a fluid package from the Aspen Properties Databank in Aspen HYSYS, where are stored the Henry's constants? | Solution: As mentioned in the How to find Henry coefficients in Aspen HYSYS? article, Henry's Law cannot be selected explicitly as a property method in Aspen HYSYS. However, Aspen HYSYS uses Henry's Law when an activity model is selected and non-condensablecomponents are included within the component list.
If the user... |
Problem Statement: How can I specify heat transfer in a Aspen HYSYS pipe segment? | Solution: There are 4 ways of defining heat transfer in Aspen HYSYS pipe segment.
1. Heat Loss : User need to manually enter the heat loss to the surrounding. Program will not calculate the heat loss and use the user entered value.
2. Overall HTC : Enter ambient temperature and overall heat transfer coefficient; hea... |
Problem Statement: Which method is used by EDR to calculate lifting lugs? | Solution: Lifting lug design is not included in the ASME Code Section VIII Division 1, the default design code used by EDR. Instead, EDR uses a different standard.
Attached to this article you will find a PDF document with the standard being used (variables, equations and example).
Keywords: Lifting lugs, EDR, mechani... |
Problem Statement: What is the Purpose of #AUTO with UNITS.XLS in Aspen Petroleum Scheduler? | Solution: Aspen Petroleum Scheduler, Units.XLS supports many # Commands and #AUTO is one among them.The Purpose of this Command is, to execute excel Macro, when the user hits “OK” button in the Event Dialog box. In other words, while SAVING the event, the Macro gets executed in the background.
The MACRO may be a SIMPL... |
Problem Statement: How can I view two tabs at once in Aspen Plus? | Solution: Often it is useful to be able to view two tabs at the same time. For instance, having two tabs open can make the process for setting up Design Specs or a Sensitivity Analysis easier. As another example, it is possible to leave Stream Results open while still making changes to the main flowsheet without havi... |
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... |
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