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Problem Statement: How does one report phase density for each tray in my column in Aspen HYSYS? | Solution: To display the density of the liquid and vapor phases for each tray in a given column, open the column view to the Performance | Plots page and select the Transport Properties option in the Tray by Tray Properties window. Next, select either the View Graph or View Table button to open the corresponding form a... |
Problem Statement: The column was able to converge in the column environment, but an inconsistency error occurs due to a variable that is a result of column convergence when I turn on the solver in the parent environment. | Solution: This could occur when you have previously converged your column, and then entered the column environment to modify the column unit operations.
Ensure that no variable in the product streams of the column has been specified directly. Add such variables as column specifications on the Monitor / Specs page on th... |
Problem Statement: In a new model, we want to merge the content of subflowsheets from several existing models, while preserving the layout and selected fluid packages originally in the subflowsheet.
What is the recommended procedure for the tasks? | Solution: The first task we discuss here is to move the content of an existing subflowsheet to a new case. Currently, HYSYS does not have an operation to allow a user to export the content of a subflowsheet into a standalone model. If you no longer have the access to the original template file used to create the subflo... |
Problem Statement: How do I create an 'Ignore This Unit Operation During Calculations' checkbox? | Solution: Use the following procedure:
add a standard check box to the extension view,
double-click on the check box or right click and select Check Box Properties,
double-click the Target Moniker box or click the Ellipsis button directly beside it,
select Object is Ignored in Calculations,
change the text in the Label... |
Problem Statement: Is it possible to export the PFD to be pasted in another application such as Word? | Solution: Functionality allowing the export of the PFD was incorporated in Hysys with the v. 2.2 release. To export the PFD, object inspect the PFD background and select Copy Pane to Clipboard. This will copy the PFD to the Windows clipboard. It is then available to be pasted into applications such as MS Word or Paint.... |
Problem Statement: Aspen Properties Enterprise Database (APED) is located on a remote server and you cannot access a database on that server from a client PC using the Aspen Properties Database Manager. | Solution: This problem is caused when the remote server is not configured properly for remote access and/or the Windows Firewall is blocking access.
Follow these steps to configure a SQL Express 2005 server to be used by remote users. All these steps must be performed on the server machine and may be performed through ... |
Problem Statement: Where can I find FAQs on SLM Installation? | Solution: The SLM is a security system which is used across several products. SLM questions will be found by selecting SLM as a product, rather than under each specific software application product name.
Keywords: SLM
References: None |
Problem Statement: When tiny amount of water is added to a flowsheet using the PC-SAFT property method, the computation time increases dramatically. | Solution: Adding a tiny amount of water will activate the association term in PC-SAFT. The association term in PC-SAFT is self-contained and has to be solved within each iteration for the density. The increase of the CPU time due to the association is proportional to N^2 where N is the number of components in the strea... |
Problem Statement: After pasting a copied stream, the newly created stream contains no process information. Is there an easy way to transfer all the process information from the original stream? | Solution: When you create copy a stream (i.e. select Edit | Copy from the main menu, or right click on the stream icon from the PFD and select Cut/Paste Objects...Copy Selected Objects), Aspen HYSYS copies only the user-specified values, including composition. For example, if all values in the original stream are calcu... |
Problem Statement: After creating a new, in-house databank and adding to the Aspen Properties Enterprise Database (APED), how do I generate a report of the components, properties, and values? | Solution: This option is available with aspenONE version V7.2 and higher only. AspenONE V7.2 has a new functionality called APRDTS which exports all the compounds and property names from a given databank to a simple text file. APRDTS will not put the actual values in this report.
To do so, right click on any databank, ... |
Problem Statement: How is wax deposition calculated in the pipe segment using the ProFES wax model? | Solution: The deposition of the wax from the bulk oil onto the pipe wall is assumed to only be due to mass transfer; shear dispersion is not considered to be a significant factor. The rate of deposition is described by:
m' = k[Cwall - Cbulk] * A * MWwax
m' = deposition rate (kg/s)
k = mass transfer coefficient (mol... |
Problem Statement: How does one import or copy composition from Excel to Aspen HYSYS? | Solution: Select the desired range from MS Excel and click Ctrl+C to copy the values to the Windows clipboard. Switch to Aspen HYSYS and open the target stream to the Worksheet | Composition page. View the composition window by selecting the Edit button then press Ctrl+V to paste the values into the form, ensuring that... |
Problem Statement: Sometimes, you or your clients would like to generate PFD tables in different units for different unit operations of the same type. So how do you do it? | Solution: Currently, all graphic user interface features are using the same unit set. You can only use a different unit set within a spreadsheet unit. To create PFD tables showing the same unit parameters in different units, you can consider two options, 1) using HYSYS spreadsheet unit operation, or 2) using user varia... |
Problem Statement: How does one increase the line thickness on a plot within Aspen HYSYS? | Solution: To increase the line thickness for any plot displayed in Aspen HYSYS, follow the steps below:
1) Right-click on the graph and select Graph Control from the ensuing menu.
2) On the first page tab (i.e. Data) of the Graph Control window and highlight the curve of interest from list on the left hand side.
3) Inp... |
Problem Statement: Is it possible to report Std Gas Flow using a different pressure basis? | Solution: Std Gas Flow is based on the molar volume of an ideal gas at standard conditions (in Aspen HYSYS, standard conditions are 15 Celsius and 1 atmosphere if SI units are selected and 60 Fahrenheit and 1 atmosphere if Field units are selected). This value is a direct conversion from the stream's molar flow rate ba... |
Problem Statement: Basic Aspen Solubility Modeler work flow | Solution: The basic work flow is as follows -
1. The Aspen Solubility Modeler from Windows start menu will open up its installation folder. The bin sub folder contains the help file. The NRTL-SAC holds the actual files.
2. Setup Excel for using Solubility Modeler. Use the file help since it has step by step ins... |
Problem Statement: The RESET button on the column view does not appear to remove all the estimates. Why is that? | Solution: The column RESET button clears the currentSolution as well as any estimates generated by column. If you have manually entered some estimates on the Parameters | Profiles pagetab or the Parameters | Estimates pagetab, then clicking the RESET button will not remove those estimates.
In order to remove any estima... |
Problem Statement: What flash types are available in Aspen Properties Toolkit and what are the KODE, SPEC1 and SPEC2 arguments for FLSH_PFLASH? | Solution: To be able to use the Aspen Properties general flash utility for flash calculations, FLSH_PFLASH, you must specify one of the following combinations of information for two and three-phase flash calculations:
? Temperature and pressure (TP flash)
Pressure and molar vapor fraction (PV flash)
Temperatu... |
Problem Statement: How do I get started using Aspen Properties Mobile on an iPhone, iPod or iPad? | Solution: Here is a Step by Step Tutorial for Aspen Properties Mobile.
Once connected to the Aspen Properties interface, you will see the message ?Creating a new case will clear the current case?. Select Clear to proceed. Then select ?Create new case? to start a new case.
Components can be added under the ?Components? ... |
Problem Statement: After run, when opening 'Results Window', the transport map does not show correctly. | Solution: The reason is that the path to the geo sets need to be fixed. Those files are all in the relative path. The followinsg are the procedures to fix it,
1. Right click 'Maps' on the model tree, select 'Set Folder for MapX Files...', select the Maps folder which gets installed in the sample model directory, or if ... |
Problem Statement: Stream Cutter does not solve. What do I do? | Solution: 1. Make sure you have a transfer basis. Double click on the cutter || Transition tab || choose a Transfer basis (usually T-P flash). If no radio button is chosen then bottom of this window will show Transitions Not Ready. The following picture shows the interface.
2. If the Transfer basis is ready but the... |
Problem Statement: Can Aspen HYSYS predict the composition of combustion gases? | Solution: By using the Gibbs reactor, Aspen HYSYS can predict the composition of exhaust gases resulting from the combustion of fuel gas. For this, it is required to define the composition of the fuel gas, as well as the expected combustion products, like CO, CO2, NOX, etc.
The Gibbs reactor calculates the outlet compo... |
Problem Statement: How do you view and compare static properties in Aspen Properties Mobile? | Solution: Tap the information button () next to any component to view more details, including the chemical formula, CAS number, list of synonyms, and a list of static properties (molecular weight, critical constants, and other values which are independent of temperature and pressure).
Use the Compare button on the Comp... |
Problem Statement: When using the Hayden-O''Connell model at elevated temperatures and pressures, you might encounter a discontinuity in the predicted PVT-behavior and related properties, such as vapor phase densities, fugacity coefficients etc. | Solution: The discontinuity is caused by an automatic constraint mechanism which steps in any time you are trying to use the Hayden-O''Connell model beyond the range of its applicability. This constraint mechanism will recalculate the vapor phase molar volume. Hence, the effect on density and other derived properties.
... |
Problem Statement: Why does my column not converge if I turn the solver on inside Column Environment, but if I do the same in the main PFD it converges? | Solution: When you turn the solver on in the column environment you are running the column solver only.. In this scenario, you can run into two situations; one in which the column will converge, and a second in which it will not.
Scenario 1 - No product streams interact with any feed streams outside the column environm... |
Problem Statement: How to access the Aspen Properties functions in MS Excel 2007? | Solution: In order to get the Aspen Properties function in MS Excel 2007, you need to add the Aspen Properties Excel 'Add-in' following the steps given below.
1. Click on MS Office button (colored button upper left hand corner of the Excel file, next to save button) II Excel options II Add-ins II Manage 'Excel add-... |
Problem Statement: Why can't I close my case using Ctrl+Z? This used to work in previous versions of Aspen HYSYS. | Solution: New in Aspen HYSYS 2006.5, Ctrl+J was added as a shortcut key to close simulation cases. The old shortcut key used for this purpose (Ctrl+Z) is currently used for for the ?Undo? feature, in accordance with Microsoft standards.
Keywords: shortcut, short, cut, hotkey, hot, key, close, case
References: None |
Problem Statement: What's new in version 2006 for Expander Simulation? | Solution: In versions of HYSYS prior to HYSYS 2006, Performance curves for expanders could only be specified in terms of Volume Flow vs Head
Entering data in this form required the user to convert from the data format typically provided by expander vendors as Mass Flow vs Shaft Power. The need to perform this convers... |
Problem Statement: How do I model a batch process in Aspen HYSYS? | Solution: A batch process can be modeled with Aspen HYSYS by leveraging specific features and capabilities available in Aspen HYSYS Dynamics. For example, the Event Scheduler can be used to trigger the start-up and shutdown sequences related to your batch process. For more details on the capabilities and features of As... |
Problem Statement: How do I subcool a stream? | Solution: Add the attached user variable 'subcool.huv' to a stream.
The 'subcool.huv' user variable will set the temperature of a stream such that it is subcooled by the amount you specify in the user variable 'Worksheet | Uservariables | Subcooling'. For a pure water stream at atmospheric pressure where you set it to ... |
Problem Statement: Which versions of Aspen FCC are compatible with Windows 2000? | Solution: Aspen FCC 10.2 DOES NOT WORK WITH WINDOWS 2000 OR OFFICE 2000. It is based on the old RT-Opt 10 software which never ran on 2000.
Aspen FCC 11.1 will support NT and 2000. Please note that we support Office 97 on NT and Office 2000 on Windows 2000. There will be no mixing and matching of Office versions with O... |
Problem Statement: What are the advantages and disadvantages of installing the Aspen Properties Enterprise Databanks (APED) on a central SQL server and not installing the databanks on each workstation in an organization? | Solution: Accessing data from the central server will be slower than the local database, plus the added cost of administering it centrally. The benefits lie in the fact that company-specific databases can be centrally created, controlled and deployed thus ensuring that all users and applications that need them have acc... |
Problem Statement: How do I add the Energy Stream and Composition tabs to my workbook so that they are always present when I open a new case? | Solution: You can add a composition tab to the workbook by going the workbook menu at the top of your program (only available with the workbook open) and choosing Setup. This will bring up a window with the heading Workbook Tabs on the left. Press the Add button. A window displaying all the default workbook tabs is sho... |
Problem Statement: Why I am getting an error that says Unable to Load Extension Server? | Solution: The error message is shown in the following image:
This error message refers to the fact that the simulation case has been opened uses an Aspen HYSYS extension that is not registered on the current machine. Aspen HYSYS extensions are external pieces of code (in the form of a DLL) that must be registered l... |
Problem Statement: How can a user customize the appearance of sets and tables in SCM? | Solution: Sets and tables appearance may be customized, including the Information Table (INFO) and the Error Messages Table (ERROR).
To perform this action, open SCM and select OPTIONS / SYSTEM from the toolbar. Then, click on the tab EDITORS.
The EDITORS window contains various features that can be modified in order t... |
Problem Statement: The table for the UNIFPS parameter used in the PSRK Equation of State requests Aij, Aji,Bij,Bji, Cij,and Cji; however, there is no documentation regarding the temperature dependency. | Solution: The UNIFPS parameter has the following dependence:
tau = exp -(UNIFPS(1)/T + UNIFPS(2) + UNIFPS(3)*T)
This parameter is used in a special UNIFAC model (model name = GMUFPSRK) which is used in the PSRK property method. This property method uses the PSRK equation of state, which uses a mixing rule that incorp... |
Problem Statement: What is Aspen Solubility Modeler? | Solution: Aspen Solubility Modeler is a new part of Aspen Properties introduced in V7.0 as part of the Process Development module. It consists of a series of Excel workbooks which were developed using Aspen Properties Excel Add-In and Aspen Properties. Each workbook is associated with an Aspen Properties backup file.
... |
Problem Statement: When entering PROP-DATA for asymmetric binary parameter such as HENRY for a legacy databank using DFMS, do you need to enter both the ij and ji values if one set is meaningless? | Solution: For asymmetric parameters where only one of the two parameters is available or meaningful, use a value of missing (1e35) or an asterisk (*) in place of the missing value. For example, for Henry constants only one compound in many pairs is plausibly the solvent, so one of the two values is meaningless. In this... |
Problem Statement: How do you configure and view calculations in Aspen Properties Mobile? | Solution: The current version (V7.2.1) of Aspen Properties Mobile is designed to calculate and report pure component properties for one or more species. Thermophysical and transport properties can be calculated for the liquid, vapor, or solid phases.
Aspen Properties Mobile offers a number of calculation methods includ... |
Problem Statement: How does one delete references to extension unit operations in a case where the extension units themselves are not registered? | Solution: The situation arises when a simulation file is copied from one machine to another but the latter machine does not have the same extensions registered as the first machine.Typically users would register the required extensions on the second machine as well, however; occasionally it may be advantageous to get t... |
Problem Statement: What is the difference between between the DBR Amine Package and the Amine Pkg available in Aspen HYSYS? | Solution: Both property packages are based on AMSIM, which is an amine simulator developed by DBR & Associates. The DBR Amine Package, which was introduced in Aspen HYSYS 2004, uses the latest version of AMSIM (currently v7.3) whereas the Amine Pkg uses an earlier version of AMSIM (v7.0). Although the Amine Pkg has not... |
Problem Statement: NRTLSAC spreadsheets don't work with new AspenProperties.xla when using Aspen Solubility Modeler. | Solution: V7.0 will deliver a new product called Aspen Solubility Modeler. The product consists of a set of Microsoft Excel spreadsheets and Aspen Properties files configured to allow customers to quickly and easily calculate the solubility information using the power of the Aspen Properties engine. When a spreadsheet ... |
Problem Statement: Why can I not see the current data in my strip chart? The integrator is running, but the plot does not appear to be updating properly. | Solution: Depending upon the state of the simulation, it is possible that the low bounds for the plot may have been set such that no current data can be plotted on the chart. To rectify this, right click on the plot and select Graph Control. Next, click on the Time Axis pagetab, and change the Low Time and High Time ac... |
Problem Statement: How do I provide specifications for the MASSBAL equation based solver? | Solution: Specifications used for the MASSBAL equation-based solver can be populated on the Parameters page. The Create Specs button is useful in that it gives the user a good start. What it does is check for unit operations/streams (except SOURCE streams) with specified values and add them to the list of specification... |
Problem Statement: Why does the status bar on my heat exchanger read insensitive? | Solution: The insensitive message in the status bar of a heat exchanger is the equivalent of having a column not converging. At one point during the iterations, the error is not changing anymore.
To work around this problem, the specs for the heat exchanger can be changed to first solve (converge) the heat exchanger. T... |
Problem Statement: Can I see the results for other variables in the Case Study which are not selected as dependent variables? | Solution: For each calculated state, the Databook tracks only the dependent variables, thus it is not possible to see the results for other process variables that have not been selected as dependent variables in the Case Study.
If desired, it is possible to add more dependent variables even after running the Case Study... |
Problem Statement: How can I access mixed phase (combined liquid) properties via OLE Automation? | Solution: The HYSYS Fluid object offers properties (.VapourPhase, .LightLiquidPhase, .HeavyLiquidPhase) which can be used to get objects, of type FluidPhase, for the vapour, light and heavy (usually water) liquid phases of the stream. There is no direct way to obtain a combined liquid phase object. However, this can be... |
Problem Statement: The default calculation mode inside Aspen Properties is Property Analysis. How do you change the run type to something else such as Data Regression or Assay Data Analysis? | Solution: If you want to perform Data Regression, Estimation or Assay Data Analysis. Aspen Properties will allow you to enter the data, but the regression forms are not enabled by default. Go to the Tools pull-down menu and change the Calculation type to Regression. You will see Regression in the top frame of options i... |
Problem Statement: How can I eliminate the message Error in retrieving the list of available PVT Engines? | Solution: A HYSYS Upstream license is needed to access the features and functionality of the PVT Environment. If you don't have the appropriate license for HYSYS Upstream, you will receive the message Error in retrieving the list of available PVT Engines if you attempt to access these features. Note that the HYSYS Crud... |
Problem Statement: How do you select components in Aspen Properties Mobile? | Solution: To select components, follow these steps:
(1) Tap the Components icon on the navigation bar at the bottom of the screen to start selecting components (chemical species).
(2) Tap the ?+? button on the upper left side of the screen to open the Search Components screen
(3) Select the search mode - you can ... |
Problem Statement: When all parameters are entered after a regression, then regression is executed again the model does not seem to start at the point where the previous regression ended. Why would this happen? | Solution: When you run a problem containing multiple regressions, the regressed parameter values from one regression are used automatically in the subsequent regressions. However, if you re-run a regression, it may not start at exactly the same point as the previous regression ended, and the residual (RMS and/or SSQ) m... |
Problem Statement: Is it possible to automatically save a converged simulation prior to entering dynamic mode? | Solution: New in Aspen HYSYS 2006, you can set Aspen HYSYS to save the Steady State case automatically before you switch the case to Dynamics. This option can be set via the Simulation | Dynamics pagetab as shown in the figure below:
With this checkbox active, HYSYS will automatically save a copy of your steady sta... |
Problem Statement: I have written some VB code to launch Aspen HYSYS, but when I run the code, the Aspen HYSYS splash screen appears, and then nothing else. Why did Aspen HYSYS not open? | Solution: If you check in your Task Manager, you should see hysys.exe running in the list of Processes. This means that Aspen HYSYS did open and is running. It is just that it is running in invisible mode. You will need to add the following line into your code to make the running instance of Aspen HYSYS visible:
hyAp... |
Problem Statement: How do you manually restore the APV80, NISTV80, and FACTV80 databases in Aspen Properties Database?
Occasionally from installation problems or other changes in the Aspen Properties Enterprise Database, the APV, NISTV and FACTV databases provided by AspenTech will not be created in the Aspen Propertie... | Solution: This knowledge base describes how to manually restore the Aspen Engineering Suite (AES) V8.0 databases on Windows XP. If you need to restore AES V7.xA databases seeSolution 124819 for details.
First check for the existence of APV80.MDF, NISTV80.MDF and FACTV80.MDF and corresponding *.LDF files in the folder:
... |
Problem Statement: Where can I find stream and other results calculated by the MASSBAL subflowsheet? | Solution: In MASSBAL flowsheet mode, the Massbal flowsheet writes out calculated values to streams and pertinent unit operations. Users can also look on the Results page in the MASSBAL Op (PH1 and PH2 files) for any other results.
In Sequential Modular flowsheet mode, the MASSBAL flowsheet solves using the HYSYS solver... |
Problem Statement: I have specified all inlet streams and have specified nothing in the outlet streams. Why am I getting a consistency error? | Solution: In this type of scenario, it is likely that a stream variable has been specified in both the main PFD and in the column environment. For example, the pressure has been specified in the feed stream in the main PFD and also in the feed stream in the column environment (i.e. the same pressure has been specified ... |
Problem Statement: Is it possible to call Aspen Properties Excel Add-In functions from VBA? | Solution: No, you cannot call the Aspen Properties Excel Add-In functions (such as a TPFlash function) from VBA. These functions are Private and can only be called by the Add-In itself.
In order to develop some applications (or engineering calculations) using the Aspen Properties Excel Add-In that requires the abilit... |
Problem Statement: Why IAPWS-97 is not implemented in Aspen Properties?
Isn't the IAPWS-97 better than IAPWS-95? | Solution: The IAPWS-95 formulation is actually a better formulation to use, in particular in process simulation. It provides a reliable, continuous property values and derivatives with respect to temperature and pressure. While the 95 version is a rigorous equation of state (Helmholtz energy-based), just like the steam... |
Problem Statement: The following error message is generated when the calculator is launched:
Error in getting units from Units.dat file in /Engine/xeq. Please check if the file is missing or corrupted. | Solution: This error occurs when the Aspen Properties Excel Calculator needs to be added to the Excel environment. This is known to occur when using the Lite Client.
To add the Aspen Properties Excel Calculator to the Excel environment:
Open Microsoft Excel 95, 97 or 2000.
Go to the Tools menu and select Add-ins. The ... |
Problem Statement: What formats does Aspen HYSYS support when importing oil assay information? | Solution: Previously, only assays in binary *.oil format could be imported. New in Aspen HYSYS 2006.5, PIMS-generated assay files in *.csv format can be imported directly into the Oil Environment. Since many of the commercial assay generator tools can convert their assay format to PIMS *.csv format, this new feature op... |
Problem Statement: Are there resources available that contain the measured mixture data (i.e. TXY, PXY, etc.) that went into creating the binary pairs for Aspen Plus/Properties in v7.2. Is there any document or location where users could access this data? Is that data made public? | Solution: The experimental binary data used to regress the binary parameters in the databanks are not available to customers; however, the NIST ThermoData Engine (NIST-TDE) will have binary data in V7.3 and higher.
Keywords: None
References: None |
Problem Statement: Why doesn't my bubble point match the pure component NBP? | Solution: For equation of state based models (such as PR or SRK), the bubble point of a pure component is based entirely on the critical properties contained in the Aspen HYSYS component database. Although all equations of state will ultimately use the same pure component input parameters to calculate the bubble point,... |
Problem Statement: Where did the property package options go? | Solution: In previous versions of HYSYS, the calculation options available for Property Package were scattered in the SetUp tab. This made it difficult for users to find and select the different calculation methods they want to apply.
To increase the convenience of selection for the desired property package options, ... |
Problem Statement: What is NPSH for a pump? | Solution: Net Positive Suction Head (NPSH) is an important factor to consider when choosing a pump. Sufficient NPSH is required at the inlet of the pump to prevent the formation of small bubbles in the pump casing which can damage the pump. This is known as cavitation. For a given pump, the Net Positive Suction Head re... |
Problem Statement: Does Aspen Solubility Modeler support electrolytes calculation with ENRTLSAC property method? | Solution: Aspen Solubility Modeler does not support electrolytes. The property method used in Aspen Solubility Modeler is the NRTL-SAC and the databank used is called NRTL-SAC . This databank contains parameters for more than 100 common solvents. This parameter contains a representation of each of these solvents as a c... |
Problem Statement: When we changed a computer name, Aspen Properties stopped working. How do we fix this? | Solution: Aspen Properties uses SQL database which by default gets register for the machine name on which you have installed Aspen Properties. When you change computer name to new computer name Aspen Properties still refers to old computer name and that is the reason it stops working.
To solve this problem, all you nee... |
Problem Statement: What is velocity in the slug tool? | Solution: Velocity in the slug tool is defined as the slug translational velocity. It determines the frequency of the slug fronts but does not determine the liquid flowrate occurring in slugs. Think of a wave travelling round a sports stadium. At any one time there may be 100 people (slug volume) with their hands in th... |
Problem Statement: In the Performance tab of the LNG heat exchanger, how Aspen HYSYS calculates the LMTD value, which does not correspond to a calculation based on a overall energy balance. | Solution: The steady state model of an LNG in Aspen HYSYS is based on the concept of energy integration. Aspen HYSYS generates two composite curves, the cold composite curve combines all cold streams connected to the LNG. The hot composite curve will do the corresponding combination for all hot streams. Aspen HYSYS spl... |
Problem Statement: My feed is not all reacting (or my reaction is not going to completion). What should I check? | Solution: Check that the base component for your reaction is set properly. For example, if your reaction is: CH4 + 2O2 -> CO2 + 2H2O
and you expect it to reach to 100%, make sure that your base component is CH4. Also, check that you have enough reactant and check that your stoichiometric coefficients are set properly. ... |
Problem Statement: How to access the number of the feed stage knowing the name of the feed stream or vice versa through automation. | Solution: 1. You have to use the tray section object that is inside the columnsubflowsheet.
2. This object has a FeedStages object that contains the collection of all feed stages
3. Each FeedStage object in this collection has a name property which is the stage name where the feed occurs
4. Each FeedStage object in thi... |
Problem Statement: How can I change the units and scale of a HYSYS plot? | Solution: By default, HYSYS plots will display all variables using the active unit set, however each variable on a plot can be modified as desired. To change the display units for a specific variable, follow the steps outlined below:
- Right-click on the graph and select Graph Control from the ensuing menu.
- In the ... |
Problem Statement: Sometimes it is desirable to have a second stream act as an exact mirror of the original stream, so that whenever the original stream's state changes, the change is reflected in the mirror stream automatically. | Solution: There are several methods that can be used to achieve this effect within Aspen HYSYS. One of the simplest ways is to leverage the functionality of the BALANCE and SET operations. The BALANCE operation is used to ensure that compositions are preserved by selecting MOLE as the balance type (via the Parameters p... |
Problem Statement: How can I open the Calculation.xls file from the Aspen Solubility Modeler folder without error messages?
Opening the file from the directory the C:\Program Files (x86)\AspenTech\Aspen Solubility Modeler VX.X\NRTL-SAC, this error message appears on screen:
! Unable to generate PDF file from C:\Pro... | Solution: As program Files is a protected directory, sometimes the user may have some problems trying to open the Calculation.xls file from the Aspen Solubility Modeler directory. However, if one copies the .xls Excel file, as well as the file NRTL-SAC_130_Solvents_43_Excipients.aprbkp to a new created folder, for exam... |
Problem Statement: What equipment-specific information is needed to convert a case from steady-state to dynamics? | Solution: The purpose of the attached document is to provide simple and straightforward advice to enable engineers to produce dynamic models of real operating units using Aspen HYSYS. This guide details the basic steps to follow in order to convert a steady-state case into a dynamic case and presents the minimum proces... |
Problem Statement: A sample of Aspen HYSYS extension reaction kinetics in Visual Basic .NET | Solution: First: Download and unzip the attached zip file, bring up Microsoft Visual Studio 2005, load theSolution and build it, you will see the binary dll file is generated in .\bin\debug folder. Copy the EDF file to same folder as DLL file.
Next: Bring up Aspen HYSYS 2006 and register it, close Aspen HYSYS and reope... |
Problem Statement: This knowledge base article provides an overview of FIXA option in CMAN table. | Solution: FIXA is a Plant Scheduler simulator option found in CMAN (FIXA) .It can be set to YES or NO. When set toYES, the simulator does not move fixed activities. An activity is known to be fixed if its hierarchy level in MAKI (LEV) is greater than the fixed level in HIER (FIX, LEV).
As an example, on the plannin... |
Problem Statement: Why does the status bar on the Deposition | Methods page of my pipe segment indicate Not Calculated? | Solution: As in the figure at the bottom of thisSolution document, the status bar on the Deposition | Methods page the pipe segment may indicate Not Calculated for a variety of reasons:
1. The stream or associated pipe segment does not have enough information to run.
2. The ProFES wax calculation method does not have... |
Problem Statement: When starting Aspen Rxfinery, this error occurs:
Window Title: Critical Error
Error in ConnectServer(), module Com2Dcom. Error message:Method 'GetSimulationEngine' of object 'IAPEngConnect' failed
-OK- | Solution: One of the Rxfinery components registers an older version of a type library. If the products are installed in the correct order, i.e. Aspen Plus 11.1, Rxfinery 11.1, Aspen Plus SP1, Rxfinery SP1, this problem does not occur. If installed in any other order, the Dcom error noted above may occur.
TheSolution i... |
Problem Statement: Is it possible to see Description instead of Tags of Nodes on the Maps? | Solution: Yes, from Program Options | Map select ‘Use Description’ for Label Type
Keywords: DPO Map description
Map Description
Map Label
References: None |
Problem Statement: Freeform line is defined but the freeform data in the Results window does not represent the same. Why? | Solution: Free-form points allow you to more realistically depict the path of a transportation arc. Segments are the building blocks for defining routes.
The 'Show Point to Point Transportation' shows the transportation arcs as a straight line (as the crow flies) from the source node directly to the final destination. ... |
Problem Statement: The error message 'Cavett parameter calculation did not converge' is observed when exiting the Oil Manager. What causes this? | Solution: The error message 'Cavett parameter calculation did not converge' is caused by a failure in the iterative estimation method for the Cavett parameter. This parameter is used to calculate heat of vaporization whenever an ACTIVITY model is used. If you are using Equation of State (EOS) based model, however, this... |
Problem Statement: Occasionally from installation problems or other changes in the Aspen Properties Enterprise Database, the APV7x, NISTV7x and FACTV7x databases provided by Aspen Tech will disappear in the Aspen Properties Database Manager and therefore will not available to use in Aspen Plus, Aspen Properties and oth... | Solution: If you need to restore the databases on the server manually, first check for the existence of APV7x.MDF, NISTV7x.MDF and FACTV7x.MDF (where ?x? is your version number) and corresponding *.LDF files in the folder:
C:\ProgramData\AspenTech\APED V7.x\ (Windows 7)
or
C:\Documents and Settings\All Users\Applicati... |
Problem Statement: When a quoted cost item is entered, Aspen Icarus Process Evaluator (IPE) escalates the Adjusted Total Project Cost (cell C190 on projsum.ics) from the date of the cost engine (1Q98 for versions 5.0 and 5.1) as it does for all generated costs. This presents a problem since most quoted costs are entere... | Solution: In IPE, escalation is calculated simply, using a formula similar to the following: X = A(1 + RN)
where X = total cost, including escalation
A = 1Q98 base cost
R = rate of escalation per period (as shown in field C132 of ProjSum.ics) N = number of periods from 1Q98 to the Start Date of Basic Engineering
So to ... |
Problem Statement: How is the controlling product defined in Aspen Fleet Optimizer? | Solution: Within a given shipment, there can be more than one product to be delivered. A controlling product is a product that will run out first in a given shipment. In the detail window, the row that shows the controlling product of the shipment will be highlighted in red. This feature works only with a forecasted cu... |
Problem Statement: Why is Wetted Area shown as <empty> on Heat flux page of the Dynamic Depressuring utility? | Solution: The wetted area used in the Dynamic Depressuring utility is defined as the surface area wetted by the internal liquid content of the vessel, and is effective in generating vapor when the exterior of the vessel is exposed to fire.
When you select Fire API521 as the operating mode for the Dynamic Depressuring... |
Problem Statement: Tips for using Results Window. | Solution: This is a typical Results Window.
If you want to show the map only without the options, the simple way to do is to make the Option Window float first, then close this option window by clicking the 'x' on its top right.
To make the Option window float, click and hold the option window then drag it to the middl... |
Problem Statement: Making Stream / Operation User Variables get data from Utilities... | Solution: I want to access data from a utility and use it in my user variable, but whenever the user variable runs all the data it tries to obtain is empty. Is there a way around this?
The problem here is that utilities attached to streams calculate after the rest of the flowsheet has solved, hence when a stream PostEx... |
Problem Statement: What should I do when the binary interaction parameters are not available? | Solution: When the Binary Interaction Parameters (BIPs) for a thermodynamic model are not provided in Aspen HYSYS by default, it is usually due to one of the following two reasons:
1. The phase behavior of the binary system is very unusual, so that a single set of BIPs is not sufficient to accurately represent the mi... |
Problem Statement: The economic summary table generated after executing a DPO model has a list of data entries in a column named Miscellaneous. This report provides a detailed description on the interpretation of these entries. | Solution: The 'Sample 2' model in the Aspen Supply Chain Planner folder is selected for illustration. A snap shot of the Economic Summary table (Run | Economic Summary) is given in Figure 1.
Figure 1: Economic Summary Report
As evident from Figure 1 the miscellaneous value for JAN is -34.4186. This value is the sum of ... |
Problem Statement: Why is it called film holdup in Slug Tool? How does this differ from Liquid Holdup in the Pipe Profile? | Solution: In a slug, allowance is made for gas bubbles in the slug. The liquid holdup in the slug is the fraction of the pipe cross-sectional area occupied by liquid where this liquid/gas mixture bridges the pipe, with the liquid being the continuous phase. The model takes into account the shape of the interface from t... |
Problem Statement: How does one correct the component density calculated by the GCEOS model? | Solution: The Generalized Cubic Equation of State (GCEOS) is an alternative to the standard EOS property models that enables the user to define and customize a cubic equation. This allows for volume translation correction thereby providing a better representation of liquid volume and density by the chosen property mode... |
Problem Statement: Do I need a license to access the OLI Electrolyte property package? | Solution: A separate license is required to access the OLI Electrolytes property package, however AspenTech does not provide this directly. While certain AspenTech products do have an interface enabling the use of this property model, the license itself is provided by OLI Systems, Inc. Contact information for OLI Sytem... |
Problem Statement: What are the differences among heat transfer models available in the dynamic depressuring utility? | Solution: The differences among the different heat transfer models available in the dynamic depressuring utility are listed in Aspen HYSYS Operations Guide, which is available on the support website via the Documentation link. A summary table is included below for your convenience:
Keywords: depressuring, blowdown, mod... |
Problem Statement: How do you convert Aspen HYSYS files to use Exchanger Design and Rating (EDR)? | Solution: The attached converter allows you to convert Aspen HYSYS files that use the discontinued TASC and ACOL programs so that they will use the Shell&Tube and AirCooled models from Aspen Exchanger Design and Rating.
This converter is designed to work with Aspen HYSYS and Aspen EDR versions V7.0 with CP1 installed a... |
Problem Statement: Can I merge two component lists into one? | Solution: If you are trying to take oil hypotheticals or a group of hypotheticals from one list to another, there is a shortcut. Select the component list (where you want to add) || View || Hypothetical || select a Hypothetical Group (for oil it's a blend) || then click on Add Group.
There is no shortcut option to comb... |
Problem Statement: For two same simulations with the same basis, I am getting two different results. | Solution: The most probable cause is that you binary parameters are changed manually. Please reset the binary parameters for both the files or make them same.
Path to reset the binary parameters:
Go to Simulation Basis Manager (Ctrl + B).
Click on Fluid Pkgs tab.
Select the fluid package and press View.
Click on the ... |
Problem Statement: How to get mass enthalpy--temperature curve in heat exchanger? | Solution: Open the property view of a heat exchanger, and select Performance tab and Tables page. Here you find several columns of data following the flow path, temperature, pressure, enthalpy, heat flow, vapor fraction, and cumulative UA. For enthalpy, only mole based enthalpy is available.
If mass based enthalpy vs t... |
Problem Statement: In the Twu options for PR and SRK. What does the option Water Gas Kij do? | Solution: Water in gas calculations refer to the special temperature dependant Kijs fitted for water - Argon, C1, C2, C3, H2, N2, and CO for the liquid and vapor phase Kijs.
Keywords: Water Gas, Twu, PR, SRK, Kij
References: None |
Problem Statement: How to use MIP type Linkage in Aspen Petroleum Supply Chain Planner | Solution: MIP type Linkage
Forces a more expensive transaction to limit theSolution before a less expensive transaction of the same type (material, transport mode, sub model operation, or capacity) can be included in theSolution. This is similar to PRIORITY column in PIMS
Objective of this modeling
Add the necessary MI... |
Problem Statement: The Transportation Cross-Tab report in Aspen Petroleum Supply Chain Planner returns a Jet Engine error when you try to access it and it does not display data.
How do I fix this problem? | Solution: Delete the Results.mdb that stores all the output data so that it gets recreated. After you delete the Results.mdb file, run the model again.
The Transportation crosstab report should be accessible again.
Keywords: Transportation Crosstab report
Results.mdb
References: None |
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