question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: How do I return from the Blowdown sub-flowsheet to the main flowsheet? | Solution: Go to the Flowsheet/Modify tab and click the Go to Parent button.
Keywords: Blowdown, flowsheet
References: None |
Problem Statement: I would like to automate the Health Summary Report for a selected Aspen InfoPlus.21 system. | Solution: Before you start, please first follow the instructions included within the Aspen SQLplus Reporting help. Aspen SQLplus Reporting page can be accessed by following this URL in the IE browser on the Web server:
http://localhost/SQLplus/Report.aspx?IsPublic=true&ReportName=HealthSummary [localhost]
Before config... |
Problem Statement: In the Aspen InfoPlus.21 Manager under the File menu option, there is an option to 'Restore Group Configuration'.
Below this, there is an option to 'Replace' or 'Merge' Current Configuration.
Under Merge, there is an option to 'Overwrite' or 'Keep' Existing Tasks.
What do these all mean? | Solution: The Restore Group Configuration option is used to reinstate the list of defined IP.21 tasks in the IP.21 Manager along with the start up order of the tasks.
At some point, the list of tasks was saved or should have been saved using the File | Save Group Configuration option into a file with an .ipg extension.... |
Problem Statement: How can I bypass the login prompt that requests username and password when launching the PCWS web page? | Solution: Follow these steps to change the internet settings so that it automatically logs in without prompting for the username and password:
1. Open Control Panel and select Internet Options for the Internet Properties dialog box to open.
2. Under the Security tab, select Local Intranet, and click on the Sites butto... |
Problem Statement: What needs to be done in order to migrate from a Framework Security server to a Local Security server? | Solution: In order to migrate from a Framework Security Server to a Local Security server please do the following:
1. On the Framework Security server open AFW Tools and switch to the 'Transfer AFWDB Data' tab.
2. Export the Roles and Applications by clicking the 'Export' button. A drive and path can be placed in front... |
Problem Statement: A customer is looking for a | Solution: to automate the Aspen Extractor stop/restart procedure when having to reboot the APRM/IP.21 server.
Questions:
1. Is it a must to disable the Extractor Scheduler prior to stopping the Aspen IP.21 Database and Aspen related services or will it be enough to just stop the Aspen Extractor Service?
2. Are there a... |
Problem Statement: How to initialize the vessel temperature profile for dynamic simulation? | Solution: A vessel can be configured to account for heat transfer between vessel fluid and surrounding environment. A detailed heat loss model includes inside vapour and liquid phase heat transfer coefficients, outside heat transfer coefficient, and heat conduction through the metal wall and insulation.
HYSYS calculate... |
Problem Statement: aspenONE Process Explorer (A1PE) returns the following error: Server is unable to acquire SLM_RN_PME_IP64_PRDSRV license, and no value shows. | Solution: Make sure that IP.21 server is running under a granted license status
Open the IP.21 Admin
Right click over the server name | properties and then check license status.
If IP.21 is running with a license denied or grace period mode it will cause this problem in A1PE.
If the license status is Granted then do th... |
Problem Statement: How do I find heat of fusion for a chemical? | Solution: Follow the steps below
Search for the chemical in Aspen Plus properties environment or Aspen Properties (KB 000096832)
Click the Retrieve parameters button
A pop up window appears. You can select copy pure component parameters to input if you would like to see the parameters on input forms as well
In the ... |
Problem Statement: VBA Automation does not explicitly reports Unit Operations and/or Process streams status. | Solution: The easiest way to acknowledge the calculation status of a piece of equipment or stream in a simulation is by accessing its Status bar. This can be accomplished by making use of the below BackDoor command:
Dim hyApp As HYSYS.Application
Dim hyCase As HYSYS.SimulationCase
Dim b As Object
Dim te... |
Problem Statement: How do I specify distillation temperature corresponding to x% EVAP [Petrol]? | Solution: The x% EVAP [Petrol] is found under the calculator tab in the Workbook. This is often used to obtain the % corresponding to a distillation temperature. By default, the value is <empty>.
The x% EVAP correlation is available under the Petroleum correlation type on the Correlation Manager. The Distillation Temp... |
Problem Statement: Why is the number of identical items field not adjusting my quoted item? | Solution: The software requires 2 fields to be entered correctly for this to work:
1. The 'Quantity adjustment option' field must be set to 'Y'.
2. The 'Unit of measure' field must be set to 'Items'.
Keywords: quoted, identical items, unit of measure, ITEMS, quantity adjustment, quantity
References: None |
Problem Statement: How do I add a Motor Operated Valve? | Solution: Solenoid valves are created via Instrument Installation Bulks:
Start with a Plant Bulk Pipe component
Go to Options | Instrumentation
Select the Control Valve location (pipe line number, enter 0 to install on given pipe)
Must specify an On/Off valve
Select “Remote ControllType” as “M”
Keywords: Motor, operate... |
Problem Statement: What is the default productivity in the Economic Evaluation products, and what does it include? | Solution: The Economic Evaluation products use a default productivity of 100 percent. The 100 percent productivity assumes a 42 minute work hour due to breaks and delays.
You may override the default 100% productivity from the Project Basis View | Basis for Capital Costs | Construction Workforce | Wage Rates form. Yo... |
Problem Statement: Is it possible to estimate parameters for two isomer molecules which cannot be found in the database? | Solution: If the desired isomers are not available in any of the Aspen Plus data banks, it will be necessary to directly define them to keep on working. But, if only the structure for each of the isomers is drawn without any additional parameters entered, the results will be the same for each of them because Aspen Plus... |
Problem Statement: Why is the escalation cost not appearing on my report? I added escalation index values (Project Basis View | Escalation) and selected Accumulated as the method. | Solution: When accumulated is selected as the method, only the forward escalation (present to future) is reported as a lump sum. The forward escalation values are entered in the ESCALATION INDICES section. Once Escalation Indices are provided, then a lump sum Escalation Cost will be reported in the Non-Field Cost Summ... |
Problem Statement: Can I zoom in on the ACCE input forms? The data entry is small and difficult to read. | Solution: Yes, it is possible to zoom in on the forms to make them larger and easier to read. Hold down he ctrl key on keyboard and scroll using your mouse wheel or touch pad.
Keywords: zoom, forms, small
References: None |
Problem Statement: Why are there no warnings flagged for Sound Power Levels (SPL) when using E.I. Guidelines (2008e) as screening criteria for acoustically induced vibration (AIV) calculations? | Solution: Aspen Flare System Analyzer (AFSA) does not flag a warning if E.I. Guidelines (2008e) screening criteria is selected and the Likelihood of Failure (LOF) is less than 0.5.
When the calculated results for AIV-SPL are greater than 155 dBa and the result is not being flagged (i.e., font is not red; there is no “... |
Problem Statement: Was the gProms born from ACM? What is a conversion tool? | Solution: Both ACM and gProms originated in Imperial College, London and have common roots. However, that does not mean we can convert easily between them. We have no way to reconcile these two products.
Keywords: gProms, ACM, Aspen Adsorption, Aspen Custom Modeler
References: None |
Problem Statement: How to create the connection of the Aspen Adsorption with the Comsol? | Solution: It need to use 3rd party tool. It is should be possible using Excel as a bridge application. Currently, after build the model in Aspen Adsorption, with installation of Aspen Simulation Workbook, Excel can be used as input and output interface of Aspen Adsorption.
Keywords: gProms, Aspen Adsorption, Comsol
Ref... |
Problem Statement: Are the Escalation Values applied to User-Entered Costs? | Solution: All user-entered costs (quoted cost items, quoted equipment costs, library items, material/labor lump sum additions, project indirects, etc) are assumed to be valid at the User base time point.
The User Base Indices (UBI) only applies to the system generated costs which are adjusted to User cost values (at t... |
Problem Statement: How RPLUG calculates the heat transfer to environment in Aspen Plus Dynamics? | Solution: When “Model equipment heat capacity” is chosen, the heat transfer between the fluid and the material of the reactor is calculated with the mass of the material and heat transfer coefficient. The heat transfer between the fluid and wall is calculated according to:
Q_flux_wall = U_wall*(Ti - T_wall),
Where,
T_... |
Problem Statement: What are the various unit operations in Aspen HYSYS that facilitate heat transfer modeling? | Solution: Aspen HYSYS features a variety of unit operations to facilitate heat transfer modeling. Users can use the following unit operations from Model Palette to model heat transfer.
Heater/Cooler: The Cooler and Heater operations are one-sided heat exchangers. The inlet stream is cooled (or heated) to the required ... |
Problem Statement: How can I set the condenser temperature for a Radfrac column if I'm not using a Partial-Vapor-Liquid condenser type? (Note: only the Partial-Vapor-Liquid condenser type allows temperature to be specified on the Condenser tab of the Radfrac input form.See article How do I set the condenser temperatur... | Solution: It is possible to set the condenser temperature using a design specification inside the column. The design spec (dependent) variable would be the stage 1 (condenser) temperature. The vary spec (independent) would be condenser duty. Note that the condenser duty would need to be one of your operating specs fr... |
Problem Statement: Is it possible to skip installation of the SQL Express Engine? | Solution: You need to change the registry to tell the installer to skip installation of the SQL Express engine on the client machine. This is needed for customers whose IS policy prohibits installation of any SQL engine on the client PC.
1. For 2006.5, merge the attached ( MSDE_fool_installer.reg) registry into the ... |
Problem Statement: How to change the Unit Basis for a project in Aspen Capital Cost Estimator? | Solution: In this example we show how to change the units for the Wire Size to mm2.
When you have a project there is a Unit Basis library associated to it, for example US_IP:
This unit basis doesn't have mm2 by default so you need to change the specification for this.
The way to do this is by closing your project and t... |
Problem Statement: Is there a way to specify API 650 standards for my process vessel? | Solution: Yes, you may specify the Vessel Design Code in the Project Basis View | Basis for Capital Costs | Design Basis | Equipment Specs. There you can specify ASME, which refers to ASME code, Section VIII. Note that ASME code, Section VIII complies with API 650 standards.
Keywords: API 650, API, 650, vessel, ASME
... |
Problem Statement: What does the Accessories cost field in the Customer External Files | Civil Material mean and how does it work? | Solution: The Accessories cost field in the Customer External Files | Civil Material refers to Anchors and Embedments costs in user currency per unit volume of concrete. These items are generated for certain equipment foundations and can be viewed in the Evaluation Report. For example, if a project scenario contains ... |
Problem Statement: How to handle MPI related errors in PIMS when using parallel processing? | Solution: In V9, V10 and V11, PIMS replaces MPICH2 with Microsoft MPI (MSMPI), which should be in “C:\Program Files\Microsoft MPI\Bin\”. Users may need to uninstall MPICH2 or disable MPICH2 service from task manager if it exists on the machine before. In the registry, please also confirm MPIExecDirectory does exist for... |
Problem Statement: When an EO script (from model manager) is copied to notepad, it loses all the cariage returns (as shown below). Is there a workaround? | Solution: This problem is observed in older builds of notepad like version 1709. In newer builds like 1809, the problem is not observed. Easy workaround is to copy the script to Wordpad or MS Word
Keywords: Equation oriented, global scripts, local scripts
References: None |
Problem Statement: When grouping several trends in one trend plot, how can I display all the titles for each of the trends?
For example, in the plot below, how can include T011 and T012 in the plot title. | Solution: To display more than one line of title to show several trends, go to Gantt & Trend Chart Options (or access through Gantt > Preferences) and in the Graphic Features tab, uncheck the option “Show only one trend title for each Y-axis for multiple trends”.
Click “OK” to apply changes. Now you should see all the... |
Problem Statement: In several of the heat exchanger input forms, there are options for specifying cladding. Included in those options, there is a Cladding location field with SHELL, TUBE or BOTH as available selections. What does the cladding location option include when specified for a heat exchanger? | Solution: The Cladding location tells Icarus which pieces to clad. It specifically refers to the Tubesheet, but also entails ancillary items. Note that tubes are never clad.
The TUBE option will clad one side of the tube sheet as well as the channel(s) and heads that are in contact with the tube side material.
The SHEL... |
Problem Statement: Sometimes when storing PIMS model in a OneDrive folder, users might get errors related to files not being opened when running the model. These errors might vary for each user but if you are working with a model that is stored in OneDrive and are getting these types of errors, you can try the | Solution: described in this article.
Example of error: ERROR. COULD NOT OPEN FILE...
Solution
To solve the issue, you will need to pause OneDrive syncing while you are using PIMS. To do right click on the OneDrive cloud icon on the notification area. This will display a list of options. Click on “Pause Syncing”.
Yo... |
Problem Statement: I specified the distance to the Motor Control Center (MCC) on the area electrical specification (Area Specifications | Area Electrical | Distance to Motor Control Center) as 500 ft. Now I am receiving a warning which states the SPECIFIED DISTANCE TO MCC MAY GENERATE OVER SIZED WIRE/CABLE. However, e... | Solution: Electrical wire is a much higher voltage than instrument wire (480/460 volts for electrical wire compared to 24 volts for instrument wire). Due to the lower voltage, the Icarus cost engine does not check voltage drops on instrument signal wire. It does, however, calculate voltage drops on electrical wire and... |
Problem Statement: How to define Min% and Max% in Blends in MBO？ | Solution: In MBO, it is a good practice to define reasonable Min%, Max % and Threshold for all components. This would guide the optimizer to search in a more practical and limited space and help with convergence.
To define MIN% and MAX% in blends, users should go to Model>>Product and under Components, Min% and Max% of... |
Problem Statement: What are the file formats in Aspen Plus simulations? | Solution: File Type Extension Format Description
Compound *.apwz Binary Compressed file which contains the model (the BKP or APW file) and external files referenced by the model. You can add additional files such as supporting documentation to the APWZ file
Document *.apw Binary File containing simulation input, result... |
Problem Statement: How to create submodels to replace PIMS internal structure for CRDTANKS and CRDALLOC tables? | Solution: In PPIMS model, CRDTANKS and CRDALLOC tables are used to define tank beginning inventory and allocation to crude units. PIMS takes care of the internal structures for both tables.
In some cases, users would prefer to set up submodel tables to replace the PIMS internal structures for crude tanks so as to add c... |
Problem Statement: What are the various available specification types for a heat exchanger in Aspen HYSYS? | Solution: The available specification types for a heat exchanger include the following (these can be added via the Specs Page)
Specification Description
Temperature The temperature of any stream attached to the Heat Exchanger.
Delta Temp The temperature difference at the inlet or outlet between any two streams attac... |
Problem Statement: How to do Aspen MBO model validation and find missing data? | Solution: Apen MBO model validation is a crucial step to troubleshoot model infeasibility and convergence issues. In MBO models, almost more than 50% infeasibilities come from missing or bad inputs.
Users need to check if there are missing data in the model:
Verify all tank properties exist
Populate reasonable Defaults... |
Problem Statement: What are the various mathematical/logical in Aspen HYSYS that automate tasks and support engineering calculations? | Solution: Following mathematical/logical operations are available in Aspen HYSYS to automate tasks and support engineering calculations.
Balance: The Balance operation provides a general-purpose heat and material balance facility. The only information required by the Balance is the names of the streams entering and le... |
Problem Statement: How do I add costs for a Close Circuit Television (CCTV) system? | Solution: The option to add a CCTV system is found under Project Basis View | Basis for Capital Costs | Design Basis | Electrical Specs. This option is also available in the Area Specs | Area Electrical. Change the option from N to Y to include it.
CCTV is part of the Communication and Alarm Systems section. Other o... |
Problem Statement: Cim-IO store file does not forward and tags do not update after communication is restored. This behavior can be caused by multiple network cards or a difference in configuration between the Cim-IO client and Cim-IO Interface server. | Solution: On the Aspen Cim-IO client server [Aspen InfoPlus.21], check the file ..\AspenTech\CIM-IO\etc\cimio_logical_devices.def and note the NODENAME referenced for the given Aspen Cim-IO interface.
EX; LogicalDevice NODENAME Service
On the Aspen Cim-IO interface server, check the ..\AspenTech\CIM-IO\log\CimIO_MSG.l... |
Problem Statement: How do I get temperatures for different % true boiling points (TBP) in Workbook? | Solution: If the desired temperatures are for 0%, 5%, 10%, 30%, 50%, 70%, 90%, 95%, 100%, these variables can directly be added from the Calculator variables option.
However, if you want to get boiling point temperature for a percent (%) not available in the above option, one workaround is to follow the following step... |
Problem Statement: Which property value will PIMS use for transferred stream in destination local model if there are multiple property values defined? | Solution: In MPIMS models, streams can be transferred between local models to reflect the practical refinery/petrochemical materials distribution.
It is common properties for these transferred streams are defined/recursed in source plant as well as destination plant. MPIMS will take the following hierarchy to pick prop... |
Problem Statement: How do I adjust Scaffolding costs? | Solution: Scaffolding costs may be adjusted from the Contracts | Contractors form in the Project Basis View. Right-click on the desired contractor and select Edit. In the next form, you will see an option for Scaffolding. You may adjust the cost directly by entering a USD amount or by entering a % of DFL.
Keywords: ... |
Problem Statement: Which P&ID related items may I locate in shared directories? | Solution: Note these settings may be made from Tools | Options | Preferences | Locations tab | Other Location Specifications
The following items may be set to shared folders:
PIDDir
PIDDrawingsDir
PIDIconsDIR
The following items may not be set to shared folders:
PIDBitMapDir
PIDDrawingsSysDir
Keywords: P&ID, shared, ... |
Problem Statement: In the BJAC databank, there are 5 types of Fuel Oil:
Fuel Oil Number 1 (k=11.0)
Fuel Oil Number 2 (k=11.0)
Fuel Oil Number 3 (k=11.0)
Fuel Oil Number 6 (k=11.0)
Fuel Oil Number 6 (low range)
What is the difference between the Fuel Oil Number 6 (k=11.0) and Fuel Oil Number 6 (low range)? | Solution: Fuel oil number 6 (k=11.0) has a temperature range of 150-900 F, whereas Fuel oil number 6 (low range) has a temperature range of 80-200 F (299.8 -366.4 K). Low range refers to the temperature range over which the properties are curve-fitted.
k=11.0 is the crude oil characterization factor. The K Factor (also... |
Problem Statement: Can I save the customized Recap of Design and apply that list for subsequent runs in Aspen Exchanger Design & Rating (EDR)? | Solution: The Recap of Design screen summarizes the basic geometry and performance of all designs reviewed up to that point. The side-by-side comparison allows you to determine the effects of various design changes and to select the best exchanger for the application. You can customize what information is shown in the ... |
Problem Statement: How to use KEEPLOCL setting to preserve local model constraints in global model matrix? | Solution: In MPIMS and XPIMS models, select KEEPLOCL option to preserve any local model structure that intersects with local model purchase and sales vectors in the local table ROWS, RATIO, or MIP. The purpose of this feature is to keep any linear-programming structure, with some exception, that you have added to local... |
Problem Statement: This knowledge base article describes how to solve the Report Writer error:
The macro `AspenRpt.xla!ATMenuRunReport' cannot be found. | Solution: 1. Press ALT + F11 to open the VBA editor and compile, click OK on the compile error dialog
2. This will automatically invoke the reference window, Uncheck Missing: AspenRpt
3. Now go to Tools |
Keywords: ARW error
Macro AspenRpt.xla cannot be found
Aspen Report Writer error
References: s
... |
Problem Statement: Can I include effects of radiative heat transfer for a pipe in Aspen Flare System Analyzer? | Solution: Yes, users can include effects of radiative heat transfer for a pipe in Aspen Flare System Analyzer (AFSA) by enabiling the Enable External Radiative HTC option on the Calculation Settings|General Tab.
Also, users require to select ‘Yes’ for External Radiative HTC option on the Heat Transfer Parameters Tab o... |
Problem Statement: What is the liquid maximum velocity exponent and multiplier? These options are found in the Line Sizing Model section of the Project Basis View | General Piping Specs: | Solution: These parameters are used to calculate the maximum allowable velocity. The liquid maximum velocity multiplier, A, defaults to 100 ft/s. The liquid maximum velocity exponent, B, defaults to 0.5 They are used in the equation shown below with liquid density to calculate Vmax. This equation, as well as the on... |
Problem Statement: When opening a v10 case file and in v11 and trying to upgrade the CAP library case file GML_V11-0.CASX, you might get the below error message: | Solution: This error message is caused because sometimes the RLIBMGR could be corrupted in the upgrade process. To resolve this, follow the below workaround:
From the command line, run:
COPY RLIBMGR C:\Program Files\AspenTech\Aspen Caps\Shared Libraries\GML_V11-0.CASX
COLLECT
LINK
Then proceed with the upgrade.
Keywo... |
Problem Statement: How does combine layers work in LNG Exchanger during dynamic modelling? | Solution: With the Combine layers check box selected, individual layers (holdups) carrying the same stream in a single zone is calculated using a single holdup.
Each layer type is included in several sets, usually only the same layer type carrying the same stream in a single zone, so this option is used to make each s... |
Problem Statement: VBA automation can access all setting inputs for an Adjust UnitOp. However, how can a spreadsheet cell be connected to the Target value? | Solution: The easiest connection would be to connect the Spreadsheet cell to Adjust’s User Supplied Target Value cell (instead of making use of the SpreadSheetCell Object option). The code below shows a sample code based on the Sweet Gas Refrigeration Plant.hsc sample file. The Adjuster’s Target Value cell is linked to... |
Problem Statement: What are internal model structures for CRDMIX table? | Solution: CRDMIX table in PIMS is used to specify that receipts contained in table RECEIVE are actually a mix of crudes. This forces the system to build the appropriate structure to cause the affected crudes to travel to the common destinations in the ratio of the receipt.
For example, MIX crude is mixed by 20% ans and... |
Problem Statement: What are the differences between two warning messages in Aspen MBO during optimization? | Solution: During MBO optimization, you may receive following two messages when receiving an incompleteSolution, which provides slightly different indications about what is the issue and how to do next step troubleshooting.
1. Infeasible nonlinear problem
In this case, MBO algorithm has detected that there is not enoug... |
Problem Statement: What is the meaning for W918 and how to solve it in PIMS? | Solution: In PIMS model, W918 reflects the issue that material balance VBAL/WBALxxx code does not match volumn code yyy in submodel Szzz.
In submodel Szzz, column yyy has -999 placeholders in E, G, L or R rows and a 1.0 in a VBALxxx or WBALxxx material balance row. The material balance row stream code xxx does not matc... |
Problem Statement: How does Aspen Capital Cost Estimator determine pipe lengths for a pump? | Solution: ACCE uses the equations described below where:
HDFT = Feet of head
GPM = Gallons per minute
Note these lengths are for Installation Bulk Piping which may be modified from the Options menu in the Pump component.
The drains are a set length at 15' and are independent of the flow and head.
In this example, a... |
Problem Statement: How do I view and modify the index file? When I double-click it, nothing happens. | Solution: Before you can view and modify the index file, first you have to select one. To select an index file, go to the Project Basis View and right-click on Index. Choose select to display the available options. Once the selection has been made, you may now double-click Index and view/modify the percentages.
Keyw... |
Problem Statement: Why are output XML and BMS files not updated after Aspen BCI mapping table changes? | Solution: The changes in the excel BCI mapping tables need to be saved in the excel file. Meantime, we may also need to Refresh Tables in order to make the changes loaded to Aspen BCI if you see the discrepancies between BCI mapping tables and output files.
Keywords: None
References: None |
Problem Statement: How can I create a Pressure-Entropy (P-S) curve for a pure component? | Solution: The Analysis tools in Aspen Plus/Aspen Properties can be used to evaluate different thermodynamic properties and their dependency on each other.
Even though there is not a one-click option to create a Pressure-Entropy curve, the same Analysis tools can be employed to create one.
This example attempts to do ... |
Problem Statement: When using Parametric Analysis in Aspen PIMS, users can define different types of variables using TYPE column. This article explains and exemplifies all the available types. | Solution: Table PARAOBJ defines the variables to be analyzed and the changes for the evaluation. There are five types of variables that can be defined in table PARAOBJ for Parametric Analysis. The following table shows an example of all these types.
TYPE 1 – Default if TYPE is blank. Indicates the item to be varied wi... |
Problem Statement: The following warning message may appear in the CimIO_MSG.log file on the Aspen Cim-IO server if it’s V11.0.1 or later and Aspen InfoPlus21 is V10.1 or less.
27-MAR-2020 13:04:41.198, Logged by CIMSERV_ST on node SERVCIM:
Warning, CIMIO client node [SERVIP21] v15.1.1.35 NOT compatible with CIMIO ser... | Solution: The warning message indicates that the Aspen Cim-IO client system will not provide Store & Forward traceability through fields in IoDeviceRecDef record. Due to the new store and forward queue the following fields are no longer updated with timestamps indicating store and forward activity. [IO_FWD_ASYNC_STATU... |
Problem Statement: How relief valve unit operations works in steady state? | Solution: The example file shows how the Relief Valve works in Aspen HYSYS.
Here are some important points about relief valve in HYSYS
1. In addition to defining the feed stream 1, the outlet stream 2 , pressure should also be defined. If the outlet stream pressure is not defined 'Unknown Product Stream Pressure' warni... |
Problem Statement: What is the picketed weir option in the tray internals design section? | Solution: The picketed weir option adds pickets to the outlet weir of the tray. This lowers the effective weir length, which in turn increases the weir load (gpm/ft). Picketed weirs are helpful in situations of low liquid rates across tray decks by promoting even liquid distribution.
The amount of picketing may be a... |
Problem Statement: How is PO period (Payout Period) calculated shown in Cash flow spreadsheet? | Solution: The payout period is calculated in the 'Cashflow' spreadsheet as:
(last negative NPV period number) - (last negative NPV value) / (PV of cashflows value at the first positive NPV period).
For example, if NPV becomes positive in period number 1, the payout period is calculated as:
PO = D1 - D116 / E109 (all ... |
Problem Statement: For the Aspen Hydraulic subflowsheet, I want to be able to add multiple pipe segments on the same unit operation, but it does not show me the Append segment option, as in the Aspen HYSYS main flowsheet pipe segment. How can I append the different segments in the same block using Aspen Hydraulics? | Solution: Within the Aspen Hydraulics subflowsheet, the append segments option is NOT available for the Aspen Hydraulics Pipe Segment. Instead, use Aspen Hydraulics Complex Pipe Segment, in this unit operation the append segments option is available under the Design | Data form.
Additional information: If you would li... |
Problem Statement: In the PCWS > History > Inspect page, there's a CCF Snapshot to get historical CCF file. Please note that, the CCF snapshtos are generated base on current CCF file structure, include the calculations and variables. | Solution: The help change is in the PCWS Web Help Inspector Page topic.
Item 7. in the list of features discusses the CCF Snapshot. This information should include the following:
The CCF that is downloaded is always based on the latest available CCF to guarantee that the database record structure matches the current p... |
Problem Statement: Is it possible to use the Column Internal Analysis feature in Aspen HYSYS Dynamic Mode? | Solution: The Column Internal Analysis feature allows you to analyze different column internals configurations. Unfortunately, this analysis tool is not available in Aspen HYSYS Dynamic Mode. When users select the Internals tab in the Column Property view while in Dynamic mode, they will be presented with the following... |
Problem Statement: How to increase the diagnostics of a calculator block? | Solution: You can increase the Calculator defined variables Diagnostics message level to 8 in Control Panel or History file on the Block Options | Diagnostics sheet; this will print the value of all input and result variables in the Control Panel and History file.
Key Words
Calculator
Diagnostics
Control Panel
History... |
Problem Statement: What is the limitation of “Estimated Mass Transfer Coefficient (MTC)? | Solution: If MTC values are not constant and other available methods fail, you can use “Estimation” method.
In this method, MTC values will be calculated as a function of supplied isotherm. Usually this approach does not provide most accurate value, rather this can be used as initial rough guide. You can fine tune the... |
Problem Statement: How do I set the condenser temperature in a Radfrac column? The option is greyed out. | Solution: The condenser type must be set to Partial-Vapor-Liquid on the RadFrac Specification | Configuration tab. This will unlock the condenser temperature input.
If your condenser is not a partial-vapor-liquid type and you still need to adjust the condenser temperature, then please see article How can I set the co... |
Problem Statement: My column converges, but an outlet stream does not. How do I fix this? There is a warning which states the temperature of the stream can not be found at the specified conditions. | Solution: To resolve this issue, open the column and go to the Flowsheet tab. On this form, change the Transfer Basis for the problematic stream to T-P Flash. This should allow the stream to converge. The choice of T-P Flash means the temperature and pressure values will be transferred across the boundary from the c... |
Problem Statement: The following message below appears every time that I try to open Aspen Plus, Aspen HYSYS or Economic Evaluation with the Statement
'Please wait while Windows configures Economic Evaluation Vx.x' | Solution: This configuration message appears every time you open Economic Evaluation, or Programs linked to it (Aspen Plus, Aspen HYSYS), due to a corrupt installation process when the AspenONE Engineering software package was installed the very first time. Hence, the following procedure has to be followed in order to ... |
Problem Statement: After setting the affinity in the Aspen infoPlus21 Manager in V10.1, the affinity settings are reset after 15 minutes. | Solution: If the Aspen InfoPlus21 system was upgraded from a prior version the affinity settings were configured using batch file and query that executes on a schedule. For reference, here is a link to the legacy process for setting affinity. https://esupport.aspentech.com/S_Article?id=000076419
Remove affinity.bat,... |
Problem Statement: How many vessels and what type of orientations can be modeled for a Fire Emergency Scenario in Aspen HYSYS/Plus Safety Analysis? | Solution: In Aspen HYSYS/Plus Safety Analysis, users can select up to 3 vessels in the Number of Vessels field and can select Horizontal, Spherical, or Vertical (incl. bottom head & no bottom head) as the orientation of the vessel under fire. The default value is Horizontal.
The Head Type can be selected as well bas... |
Problem Statement: What can I check if my PID controller is not taking action to control downstream pressure? | Solution: Below are a few ideas for settings to check. Please also feel free to contact AspenTech Support for further assistance.
Ensure the proper action, direct or reverse, is selected.
Check the Tuning Parameters. Some values may cause the valve to respond too slowly with respect to process conditions.
Ensure the ... |
Problem Statement: How do I check the temperature profile of a pipe segment? | Solution: After the pipe has converged, go to the Performance tab and click the View Profile button. This will length profile data for the pipe segment, including temperature.
Special note: the number of segments shown in the profile may be modified on the segment itself (Rating tab | Design | Increments).
Keywords:... |
Problem Statement: In a Shortcut Dryer Type, there is no way to add the Exit Stream Moisture Content. | Solution: This issue can happen, if the component to be considered as moisture under Simulations | Setup | Solids | Solid Characterisation is not specified.
To specify Water as the Moisture component, select it and move it to the right for the appropriate substream:
Once user specifies this moisture component, it will... |
Problem Statement: Is it possible to set a volumetric flow specification for a stream in Aspen HYSYS Dynamics? | Solution: Yes, this can be set via the Material Stream Dynamics tab | Specs form. You may make the selection in the Flow Specification section.
Keywords: Volumetric, flow, dynamics
References: None |
Problem Statement: Can I perform Flow Assurance in Aspen HYSYS Pipe Segment? What are the Piping Flow Assurance studies I can perform? | Solution: Yes, Aspen HYSYS Pipe Segment allows users to perform Flow Assurance studies to check the physical structures of a pipe against the predicted wear caused by the type of fluid it is carrying to estimate the functional viability of the pipeline over time.
Users can predict the formation of hydrates, the rate o... |
Problem Statement: Aspen Simulation Workbook (ASW) built-in functions to fetch various attributes of a loaded simulation case | Solution: There are few built-in ASW formulas or functions to fetch various attributes of the simulation case.
ASW Active Simulation:
“ASWActiveSimulation” returns the name of the active simulation
ASW Get Table / Model variable Attribute:
“ASWGetTableVariableAttribute” returns the given attribute of the variable ref... |
Problem Statement: Why cannot a user select the files to be compared on the File Comparison screen of the Aspen Version Comparison Assistant (AVCA)? | Solution: On the File Comparison screen, users can select the files that they want to compare, as well as view file information and previous comparison information.
However, when the file names are different users cannot select the files to be compared. Ensure that the files to compared have the same file names in the ... |
Problem Statement: Even though Heat Capacity is listed as a property that can be modified by making use of Tabular properties, its calculation inside the Simulation environment depends on the Enthalpy calculations. | Solution: Since Heat Capacity is a reflection of Enthalpy, the Enthalpy field can be modified inside the properties environment to get the desired information. For this, the user can
- Go into Fluid Packages > Tabular > Options and activate the ‘Use HYSYS’ tick box for both Enthalpy(L) and Enthalpy(V)
- On the Informat... |
Problem Statement: Aspen BCI and BMS system mapping is important configuration to make the output files generating correct format and information for Honeywell automated in-line blend control system. | Solution: The table below lists the mapping between BCI table and BMS system. Column Names are the columns in BCI tables which are used as labels assigned to corresponding information in BMC system.
Keywords: None
References: None |
Problem Statement: For the hydrocracker feed characterization, I have a question about the fingerprint bias factors. Specifically for the light, medium and heavy component ratios - what are the basis for the cuts? Are there temperature cut-offs for each one? | Solution: There aren't any hard-coded limits to the biases, but it is possible you could make them so large that they could cause an issue. For the cut point biases, the default cut points are 400F, 650F, and 1000F. So anything boiling less than 400F is light lump, anything between 400F and 650F is medium, 650+ is he... |
Problem Statement: Can I plot more than one variable after running a case study? | Solution: The Case Study plotting options depend on which Case Study Type is selected under the Case Study Setup tab. When Case Study Type is selected as ‘Sensitivity’ analysis, plot options allow up to two dependent variables and the option to select all the independent variables on the same plot.
When Case Study Ty... |
Problem Statement: How do Halt Conditions work in BLOWDOWN? | Solution: In BLOWDOWN, two different Halt Conditions can be set-up in the Run Controls tab, the Time and the Pressure. This can be seen simply as 'IF/THEN' logical statements running in parallel. For example:
'IF the BLOWDOWN analysis time is greater than the <900 seconds>, THEN pause the BLOWDOWN analysis... |
Problem Statement: Why is the Model Pressure drop option disabled for pipes (Blowdown and vapor/liquid outlet lines) when using Single Vessel Blowdown template? | Solution: The Model Pressure Drop check box is selected when users want to model the pressure drop across the pipe. If this check box is cleared, then the pipe is modeled as a vessel. In the single vessel template, the pipes before the orifice are modeled as open-ended vessels. Blowdown does not model pressure drop for... |
Problem Statement: How can we report Bulk Modulus? | Solution: Bulk Modulus is not a property that is directly reported in Aspen HYSYS. However, it can be calculated either in the Aspen HYSYS Spreadsheet for any given stream or by using a User Variable with the calculations you want, which will then be available for all streams.
The attached zip file contains a HYSYS cas... |
Problem Statement: Is there a way to add more intervals to the Heat Exchanger Performance table? | Solution: When an exchanger is using Simple End Point heat exchanger method. (This can be viewed on Design|Parameters page). The exchanger Performance Tabular Results will only show the inlet and outlet points (end points) results.
When an exchanger is using using Simple Weighted heat exchanger method which has defaul... |
Problem Statement: This article explains how to generate an XML output file when recipes are submitted through Blend Controller Interface (BCI). XML generation is only applicable for Honeywell BPC-MBO recipes. | Solution: Prior to generating an XML file, enter the XML file name using the RREP Input field found under the Program Options dialog box.
The XML output format does not support custom data sections (e.g., custom Booleans, custom reals, or custom text). A warning will be generated when the recipe is submitted. To outpu... |
Problem Statement: What is the Aspen Process Economic Analyzer Options question when I open ACCE? | Solution: This option allows Aspen Process Economic Analyzer (APEA) to be run inside of ACCE. APEA allows the user to connect to Aspen Plus or HYSYS to import the equipment from the simulation file. If you are not planning on doing so, then feel free to leave this feature turned off.
Keywords: Aspen Process Economic ... |
Problem Statement: What are Boundary Nodes? When are they added to the Aspen Hydraulics subflowsheet? | Solution: When building the flow network in Aspen Hydraulics, HYSYS automatically adds Boundary Nodes to all the inlet and outlet streams in Steady State mode.
The Aspen Hydraulics Boundary Node controls whether a boundary is considered a pressure, flow, pressure and flow, or <none> specification. This boundary type sp... |
Problem Statement: How do I define a hypothetical component (hypocomponent) with Molecular Weight over 1000 on Aspen Flare System Analyzer? | Solution: Aspen Flare System Analyzer does not allow you to create a component with Molecular Weight greater than 1000. For more information on the maximum molecular weight allowed for a hypothetical component, please see the link below:
https://esupport.aspentech.com/S_Article?id=000091203
However, there is a workaro... |
Problem Statement: How can I report properties for a nonconventional component? | Solution: To report non-conventional properties follow the steps below:
1. Change the Stream Class to a non-conventional type (e.g. MIXNC) over the Simulation environment in Setup | Stream Class.
2. Look for the non-conventional component property using the <add properties> button at the end of the results form (e.g.... |
Problem Statement: How can I restore the Flowsheet or Model Palette on Aspen Plus if I am unable to see it? | Solution: Flowsheet
If you accidentally closed the Flowsheet, please go to View and select Flowsheet
Model Palette
If you accidentally closed the model palette in the Simulation Environment, please make sure it is visible under View | Model Palette
If you still cannot view it, it is likely because the model palette is... |
Problem Statement: Why is the “Column Design” tab not visible? | Solution: In V9, Column Hydraulic Analysis was introduced to replace Legacy Hydraulics (tray and pack sizing and rating) to evaluate the pressure profile in a Column.
When opening a file built in V9.0 or older version in V10 and latest versions, the following message will appear:
If “Use Legacy Hydraulics” is selected... |
Problem Statement: How many workspaces can be created in the Administration Tool using the feature of using local databases? | Solution: Since the introduction of local databases in ABE V8.8, you can create as many workspaces as you require using a database type of MS SQL LocalDB. Please note that this type of local database is only useful when you are creating small projects in ABE that only a single user can access. For bigger projects, you... |
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