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Problem Statement: How to model a distillation column in Hysys | Solution: Tips to model a distillation column in Hysys
1. Use the column input expert which guides you through the installation of a column. The input expert is available for standard column templates:
· Absorber
· Liquid-Liquid Extractor
· Reboiled Absorber
· Refluxed Absorber
Â... |
Problem Statement: You want to remove an Exception Type from Aspen Collaborative Forecasting (CF) Exceptions Tab. | Solution: To remove an Exception Type from CF you must first remove it from Aspen Collaborative Demand Manager (DM). In DM navigate to Exception Notification>Define. Highlight the Exception Type you wish to delete. Select Remove. Republish to CF. Open CF and navigate to the Exception Tab. The Exception Type is gone.
Ke... |
Problem Statement: Is there a way to lock my HYSYS PFD so that other users can only run the case, but not add or delete operations and streams? | Solution: With HYSYS v3.4 and up there is a new tab under the Simulation --> Main Properties menu that can be used to accomplish this.
To lock the flowsheet, simply go to the Simulation menu, select Main Properties, go to the Lock tab, and then enter a password. Once the flowsheet is locked users cannot create or delet... |
Problem Statement: Why am I unable to change feed/product locations in my tower? | Solution: Structural changes to the column flowsheet (such as changing the feed or product locations) cannot be made while the solver is HOLDING. A message indicating Topological changes cannot be made whilst the solver is in hold mode should appear if changes are attempted while the solver is HOLDING (depending upon y... |
Problem Statement: What options do I have to modify the appearance of objects in a PFD? | Solution: To make a PFD selection look different, you can do the following things:
- Right click on the selection and select Format Label | Change Font (or Change Color) to modify the labels for that selection.
- Activate the PFD Size Mode (select PFD | Select Mode | Size from the main menu) and modify the size of any ... |
Problem Statement: Does the Aspen HYSYS pipe segment calculate the sonic velocity? | Solution: No, HYSYS does not provide the sonic velocity value.
In the Pipe Segment, the 'Check Choked Flow' option can be enabled (Pipe Segment Property View, Design tab, Calculation page). Using this feature, HYSYS checks for choked flow. The flow across the Pipe Segment can be increased until the warning 'Flow is cho... |
Problem Statement: You are currently using the Oracle version 10.2.0.4 for your Aspen Collaborative Forecasting (CF) environment. You need to upgrade the current version 10.2.0.4 to 10.2.0.5 since you would be facing a non-compliance issues. Is this version of Oracle supported? | Solution: As per the attached Installation guide, as long as you are on Oracle 10.2.x, this will be supported. Aspen CF V7.3 is not supported on Oracle 11g or higher.
Keywords: Oracle 10.2.x, upgrade
References: None |
Problem Statement: The equivalent length over pipe segment swage is calculated as zero | Solution: Aspen HYSYS does not give an equivalent length for swage. It just provides an angle for the pipe segment so the equivalent length is zero.
To model a reducer or enlarger with calculated equivalent length use the User Defined option and provide VH and FT factors.
Keywords: Swage, Equivalent length, Pipe segmen... |
Problem Statement: Aspen Collaborative Demand Manager (CDM) is often used along with Aspen Collaborative Forecasting (CF), to allow users who do not have access to CDM to enter overrides using the CF web interface. These overrides would require the approval of the CDM user, before being entered to the model and the dat... | Solution: explains how to configure these override levels.
Solution
The following steps guides you through this process:
1. Backup your CDM case file for just-in-case reasons
2. Backup your CF Database for just-in-case reasons. Usually, these backups are done by the Database Administrator of your group.
3. ... |
Problem Statement: I get Windows Installer Error 1605 during the installation of my application. What do I do? | Solution: When this error occurs, it prevents a setup from being removed from the system. First, you must remove the setup from the machine, and then you need to change the value of the REINSTALLMODE property.
Go to Installer folder found in the Windows directory. For example, on WinNT/2000 machines this location is C:... |
Problem Statement: There is no button or menu option to cancel/undo a data or graphical entry in HYSYS. | Solution: Save frequently and rebuild manually.
Keywords: Undo, Cancel, Delete, Button, Option, Menu, Tool, Command, Short-cut, Key, Ctrl.
References: None |
Problem Statement: Can I access Compressor results (including head factor and exponents) via Automation? | Solution: Currently the Compressor object (CompressOp in the HYSYS type library) does not have properties for all the results that are available in the interface. However these properties can be accessed via Backdoor variables. In this method the internal monikers (pointers to the information) are used to access the va... |
Problem Statement: How to define new components in FeedFuel block in Aspen Utilities Planner V8.0? | Solution: User can add new components to the Fuel component list so they can be used to define the fuel composition.
To add new components,
1. Display Explorer in Aspen Utilities Planner V8.0
2. Double click Configure Properties to bring up Build Component List - Fuel form
3. Once Aspen properties V8.0 i... |
Problem Statement: How do I specify the relative humidity for a stream in Aspen HYSYS? | Solution: Presently, relative humidity is not specified in Aspen HYSYS. However, please review the attached workaround.
The attached Aspen HYSYS simulation does the calculation. Basically, our standard saturate method is used, adding water to a gas stream until a small amount is knocked out. The relative humidity is in... |
Problem Statement: The Workbook is configured such that the stream compositions are displayed, but the compositions disappear when the Include Sub-Flowsheets button is clicked. | Solution: The composition of all streams will only be displayed if all sub-flowsheets in the case use the same Fluid Package. The fluid packages for sub-flowsheets are set in the Basis Environment on the Simulation Basis Manager\Fluid Pkgs tab.
Keywords: workbook, subflowsheet, sub-flowsheet, compositions
References: N... |
Problem Statement: How may I use Excel VBA to automate a series of runs of my HYSYS model and retrieve results for each run? | Solution: The attached HYSYS 3.1 case is a simple model of a compressor with curves enabled. The attached spreadsheet allows the user to enter a series of feed temperatures, pressures and flows. These are then sent to the HYSYS model and, for each set of input data, a set of results is extracted from HYSYS and reported... |
Problem Statement: Automation example - Access to PIPESYS extension | Solution: The attached Excel spreadsheet illustrates how to obtain details of the piping geometry and results from the PIPESYS extension.
Saved with a HYSYS 3.2 Type Library reference - For troubleshooting advice on common HYSYS / OLE Automation errors see KnowledgebaseSolution #112361.
Note
The Knowledge Base examples... |
Problem Statement: Access HYSYS PFD via Automation, Creates a sketch copy of the HYSYS PFD in Excel | Solution: The attached Excel spreadsheet includes VBA code that creates a sketch copy of the current HYSYS PFD on the Excel spreadsheet. This illustrates access to the various PFD objects within HYSYS.
For an introduction to accessing PFD objects via Automation seeSolution ID # 112354.
For details of some common errors... |
Problem Statement: Why can't I find the input page where nozzle elevation parameters are entered? | Solution: For HYSYS 2.4.1. & HYSYS 3.0.1
Go to Simulation --> Main Properties --> Licenses page --> Activate HYSYS Plant+ option
For HYSYS 3.1 and later
Go to Simulation --> Main Properties --> Licenses page --> Activate HYSYS Fidelity option
Keywords: Fidelity, Elevation, Nozzle
References: None |
Problem Statement: Can I install and run the Collaborative Forecasting Web application on IBM WebSphere Application Server? | Solution: IBM WebSphere Application Server is not supported at all at this time.
Collaborative Forecasting Web Application only can be installed and run with the BEA Weblogic Server.
Keywords: IBM
Websphere
Application Server
References: None |
Problem Statement: Aspen Collaborative Forecasting (CF) Trigger is not compiling after upgrading to V7.1. | Solution: The CF Trigger functionality is not being used in V71.
If you receive an error message that is similar to this, CREATE OR REPLACE TRIGGER cf_instance_parameters_id_gen, you can ignore it during your upgrade; it will not impact V7.1.
The CF_instance_parameters.sql table script has been updated in V7.2 elimin... |
Problem Statement: Why I am getting a temperature rise in a pipe?
I have a pipe that is loosing heat to the surroundings. Yet I observe a temperature rise. How is it possible? | Solution: Temperature can fall or rise in a pipe depending on pressure drop. Temperature rise can take place due to Joule-Thompson effect. To test whether the pipe segment or pipesys pipe is predicting a temperature rise correctly or not you can use a valve, connect a copied stream (copy from pipe's inlet) and put the ... |
Problem Statement: Where can I find the freezing point for a stream? | Solution: Unfortunately, Aspen HYSYS is not a solid-liquid equilibrium simulator and therefore it cannot predict the freezing point of any substance. Freezing point calculations require pure component properties such as melting points and solid heat capacities which are not included in our database. It is only prepared... |
Problem Statement: Why does my Automation code fail when I try to manipulate PFD items or read the extent of the PFD? | Solution: This is likely to be because the PFD window in HYSYS is not open.
Any code that tries to manipulate HYSYS PFD items, e.g.:
[PfdItem Object].XPosition = [PfdItem Object].XPosition + 100
or
[PfdItem Object].Hidden = True
will fail if the HYSYS PFD window is not open. Here [PfdItem Object] represents a valid obj... |
Problem Statement: Where can I find the DM and Aspen Collaborative Forecasting logs to submit to Aspen Support? | Solution: By default, The DM log files located at the following folder C:\CF\cf_integ\dm\log and CF log files located at the following bellow folder C:\bea\user_projects\domains\AspenCF\logs
Keywords: None
References: None |
Problem Statement: HYSYS extensions are built from a compiled COM dll and an Extension Definition File (EDF). If you have developed your HYSYS extension as a .NET object you will need to add COM Interoperability to your .NET assembly dll file in order for the extension to be registered and work properly. | Solution: There are several ways to add COM interoperability to your .NET assemblies depending on the development tools you have available. Below are listed the most common ways for the most common development tools.
Adding COM interoperability to .NET assemblies from Microsoft Visual Studio (all versions)
Open your H... |
Problem Statement: How can I check that Aspen HYSYS is representing my Crude Assay well enough? | Solution: Aspen HYSYS does all calculations on a TBP basis in the Oil Manager. Aspen HYSYS Oil Manager uses an algorithm to convert any input assay data (D86/D1160/D2887) to TBP data.Go through the following procedure to compare crude assay given by you and that calculated by Aspen HYSYS:
1. Specify an oil assay of... |
Problem Statement: Can I set both pressure and flow specifications for a feed stream in Dynamics? | Solution: Technically both pressure and flow specs can be activated on a feed stream, although this is likely to cause the model to be over specified. Usually for a feed stream connected to a valve (or other resistance operation like a heater or cooler) then a pressure spec is used; otherwise a flow spec would be used.... |
Problem Statement: I would like to run Aspen Collaborative Forecasting on a 64 bit server. However, Aspen Collaborative Forecasting is a 32 bit application. What is the memory limitation for doing so? | Solution: Memory Limits for Windows Releases
This topic describes memory limits for supported Windows releases:
Memory and Address Space Limits
Physical Memory Limits: Windows 7
Physical Memory Limits: Windows Server 2008 R2
Physical Memory Limits: Windows Server 2008
Physical Memory Limits: Windows Vista
Physical ... |
Problem Statement: What is the Ref. Temperature in an Energy Stream? | Solution: The Ref. Temperature in an Energy Stream is not used by HYSYS and will always show <empty>. This field was intended for use with some functionality which was not implemented.
Keywords: Energy Stream, reference temperature, ref.
References: None |
Problem Statement: How can I obtain elements of a RealFlexVariable as RealVariables? (Examples: Setting Tee splits, Column Stage Pressures) | Solution: Normally it is only required to be able to set all the elements in a RealFlexVariable. E.g. when setting the component compositions in a stream. This is achieved by using the SetValues method and is covered in more detail inSolution #108949.
Occasionally it is necessary to set only certain values within an ar... |
Problem Statement: Is it possible to generate an input summary using Aspen HYSYS? | Solution: New in Aspen HYSYS 2006.5, an Input Summary was added to the HYSYS Flowsheet Summary form (i.e. select Flowsheet | Flowsheet Summary | Input Summary from the HYSYS main menu). Alternatively, the Input Summary can be generated by selecting Simulation | View XML from the main menu, and then activating the Input... |
Problem Statement: After changing the password for the IIS service account user, Upload of overrides are failing in Aspen Collaborative Forecasting (CF). How is this corrected? | Solution: You should review the IIS log files first. Most likely you will see multiple 401 error messages in the logs, IIS log file clearly indicates that domain\\user name, password combination in proxy.properties file not valid (Error 401 means unauthorized login failed). You then need to perform the following acti... |
Problem Statement: Is the Tacite pressure drop correlation still available in Aspen HYSYS? I can no longer find in among the list of pressure drop correlations in the pipe segment. | Solution: As of Aspen HYSYS 2006, the Tacite Hydrodynamic Module is no longer available in the pipe segment operation. When loading older cases that contain this correlation, the following error message may appear:
After acknowledging the above warning, the simulation case will load without further incident, but wi... |
Problem Statement: Server Error when the Create Override functionality is filtered by Legal entity and Business unit in the Collaborative Forecasting | Solution: Reason for the error, Collaborative Forecasting offline loading may take a long time if the file is large or data volume is high. The default transaction timeout in Weblogic server is 30 seconds and it is recommended to change this to 90 seconds or more.
To do this please follow the below Procedure
1. L... |
Problem Statement: Data Chart failing to display when user clicks Display Chart(s) icon. | Solution: Make sure you select the check box in the Chart column before you select the Display Chart(s) icon.
Failure to select the check box will result in an error.
Keywords: Collaborative Forecasting
Chart
References: None |
Problem Statement: This knowledge base article describes the steps to install bridge libraries into SCM. | Solution: 1. Open the case into which you will install the Bridge Libraries.
2. From the Navigation Pane, click Modeling | Tools | Library Manager.
3. In the SCM Ribbon, do one of the following:
Under the Home tab, click Properties or
Under Data tab, click Properties.
The Properties Panel opens.
... |
Problem Statement: This knowledge base article gives an overview of Macros in SCM. | Solution: What is a Macro?
A macro in SCM is a user defined procedure that contains a set of instructions to perform a particular task. It comprises of a series of commands. Any SCM command can be executed from a macro, however there are certain SCM commands that can be used only in macros.
How to write a Macro:
1. ... |
Problem Statement: The following | Solution: explains how to change the language of a case file in Aspen SCM.
Solution
Starting V8.4, a new application - Aspen SCM Utilities, would be installed along with Aspen SCM.
The first step to change the language of the case file is to change the language of SCM through the SCM Utilities:
1. Open Aspen SCM ... |
Problem Statement: How does the COSTALD liquid density model in Aspen HYSYS account for the effect of pressure? | Solution: In previous versions, the Chueh-Prausnitz model was used to account for the effect of pressure when calculating liquid density using the COSTALD equation. New in Aspen HYSYS 2006.5, the Tait equation was added as an option on the Parameters pagetab of the Fluid Package form, as in the figure below:
Keywords: ... |
Problem Statement: A swage fitting added as the last segment in a Pipe Segment Unit Operation will be automatically identified as an exit swage by Aspen HYSYS. The exit swage does not appear to have an impact on the overall pipe pressure drop (i.e. if it is removed, the same exit pressure is obtained). | Solution: The swage calculation in Aspen HYSYS accounts for pressure changes due both to acceleration (recoverable losses) and friction (non-recoverable losses). The pressure change across a swage is given by [ref. 1, section 5.2.3]:
Pin - Pout = K*0.5*rho*vel^2 + 0.5*rho*vel^2 - 0.5*rho_in*vel_in^2 (1)
w... |
Problem Statement: There might be situations when you have to edit multiple cells in a table – you might be wanting to use the same value for all these cells or multiply/divide a factor to all these cells or add/subtract a value from all these cells. This | Solution: explains the easiest workflow to perform this process in all Configured Applications of Aspen Supply Chain Management.
Solution
For example, there is a screen in the Collaborative Demand Manager called the Forecast Review. This screen has a table which is used for viewing the current forecast values and to ex... |
Problem Statement: Which packing correlation should I use: Robbins or SLE? (Tray Sizing Utility) | Solution: In Tray Sizing Utility, there are two Packing Correlations, Robbins and SLE.
Robbins correlation, found in Chemical Engineering Progress Journal - May 1991, is only valid at liquid loading factors up to 20,000 and the program flags L is out of range warning message once the loading factor exceeds 20,000. Note... |
Problem Statement: What is Marginal Utility Cost and how is it calculated? | Solution: The Marginal Utility Cost (MUC) is the incremental cost incurred by a plant for generating one additional unit of that utility. Correct calculation of the MUC is important for optimal operation of the plant heat/power systems and also for evaluating retrofit options. An example of calculating the MUC for a st... |
Problem Statement: When loading Aspen Utilities Planner I get an error message Please install one of the following system compatible versions for: OOMF | Solution: OOMF is not part of Aspen Utilities Planner installation.
To have OOMF installed, you need to
· OOMF V8.4 - install Energy Analyzer V8.4 from the V8.4 DVD
· OOMF V8.6 – install PM(A+) from the V8.7 DVD
Also check inside the registry if you have the correct registry information.
· ... |
Problem Statement: I am using AutoPlant; however, it is quite tedious to transfer all the data into HYSYS. Does HYSYS interface with AutoPlant? | Solution: Unfortunately, HYSYS does not interface with AutoPlant.
If AutoPlant is an ActiveX compliant environment, however, you may be able to use a client such as MS Excel to access functions and variables in AutoPlant (functioning as an ActiveX server). Since HYSYS can also function as an ActiveX server, one could u... |
Problem Statement: I am trying to create a report in HYSYS. I want to display liquid and vapor phase transport properties (for example, Molecular Weight, Viscosity) within the report. How may I do this? | Solution: In HYSYS v3.x and above, the column phase transport properties are displayed on the Performance Tab/Plot Page. From the field entitled Tray by Tray Properties, select Transport Properties and then click on the View Table button. At the bottom of the table is a Properties button. Press this button to edit the ... |
Problem Statement: How is the settle out calculation performed in the Dynamic Depressuring Utility? | Solution: The Depressuring Utility in HYSYS works by defining a fluid of known composition and conditions and performing a depressuring calculation for a defined time period using defined heat flux and valve parameters.
The initial fluid composition is taken from the reference inlet stream(s) specified on the Design\Co... |
Problem Statement: What version of OLGAS is being used in HYSYS? | Solution: OLGAS 2000 is incorporated into HYSYS v3.1 and up. HYSYS versions previous to 3.1 used the OLGAS v1.1 correlation.
Keywords: OLGAS, HYSYS, Pipe, Correlations
References: None |
Problem Statement: Why can I not enter my D86 assay in mass percent? | Solution: Aspen HYSYS accepts TBP and Chromatographic analyses in any one of the three standard bases; however, due to the form of the API Data Book conversion curves, EFV, ASTM D86 and ASTM D1160 distillations must be supplied on a liquid volume basis and ASTM D2887 distillations must be entered on a mass basis.
Keywo... |
Problem Statement: When do the Data Sets in the Update Log on the home page of Collaborative Forecasting update and what triggers their update? | Solution: The All Sets Published columns update when the create_schema.cmd is executed or when the database (Converting CF database from prior version to current version) is upgraded.
The Data Sets Re-Published columns updates after:
1. Published is selected from the Publish Collab Forecast screen.
2. Re-publish is s... |
Problem Statement: How does HYSYS calculate pump and compressor duty? | Solution: The pump and compressor duty is calculated in HYSYS using the following equations:
Pump Duty:
Duty = Flow * Power
If outlet pressure is greater than inlet pressure, Power is calculated as:
Power = (Pout - Pin) / LiquidDensity / (Eff / 100);
Otherwise (meaning if the outlet pressure is smaller than the inlet ... |
Problem Statement: How do I enter ASTM D5307 simulated distillation data in Aspen HYSYS? | Solution: The generation of the ASTM D5307 distillation curve data is the same as for the ASTM D2887 method (both are based upon retention times and peak areas). Therefore, the ASTM D5307 data can be entered in Aspen HYSYS as ASTM D2887.
The only difference between the two assays is that the D2887 is used for light cru... |
Problem Statement: What is the definition of True Vapor Pressure and Reid Vapor Pressure? | Solution: Definition:
True vapor pressure (TVP) is the pressure of the vapor in equilibrium with the liquid at 100 F. It is equal to the bubble point pressure at 100 F.
After the sample is flashed at 1 atm and 33 F, and the resulting liquid product is mixed with air at a volume ratio of 1 : 4 (liquid : air). The pressu... |
Problem Statement: When the user tries to open and run a model in Aspen Utilities Planner (AUP) installed from Aspen ONE DVD-ROM V8.7, the user may experience some issues since the OOMF is not included within the Aspen Utilities Planner’s installation files. | Solution: OOMF is not necessarily used or required by AUP, however in order for it be to installed correctly, the user should install the following programs from the correct AspenONE DVD-ROM version:
1) OOMF V8.4 - Install Energy Analyzer V8.4 from the V8.4 DVD.
2) OOMF V8.6 - Install PM(A+) from the V8.7 DVD.
... |
Problem Statement: By default, the stream Fly-by on HYSYS PFD only shows the stream name, temperature, pressure and molar flow. Can I add more properties? | Solution: Yes, this can be done by changing options under Tools --> Preferences --> Simulation --> Tool Tips. Check the Show PFD Fly By check box, then select either the SteadyState or Dynamic radio button, depending on which mode you are currently in.
To modify the fly-by properties of material stream, highlight Mater... |
Problem Statement: Gas heats up when expanded across an adiabatic valve - why? Shouldn't it cool down? | Solution: Whether a gas heats up or cools down when expanded across an adiabatic (constant enthalpy) valve depends on the sign of the Joule-Thomson (J-T) coefficient (a positive J-T coefficient means cooling occurs and a negative J-T coefficient means heating occurs) and the sign of the J-T coefficient depends on the c... |
Problem Statement: My simulation is quite large and I am having trouble finding a stream. Is there an easy way to find the stream and make changes? | Solution: There are two methods.
1. The Simulation Navigator will allow you to view and make changes to each stream, vessel, etc. without having to do a manual search. This tool is found under Flowsheet|Simulation Navigator.
2. The Select Objects feature, found in the PFD menu, allows you to select the stream on the PF... |
Problem Statement: I am modelling a gas-gas exchanger with the heat exchanger model. With either the end point or weighted model, the reported U value on the dynamics tab of the exchanger is about 110 to 140 Btu/hr/ft2/°R where as one would normally expect an U value in the order 10 - 20 Btu/hr/ft2/°R for a gas to ga... | Solution: With the endpoint and weighted mode calculation, the heat exchanger block calculates the UA value for the exchanger from
Q = UA x LMTD
In other words, the UA is calculated by dividing LMTD into Q. Since the heat changer has default geometry values, the exchanger area is calculated from the geometry and hence ... |
Problem Statement: How can I make the Report/Datasheet/Specsheet header show only the file name not the full path? | Solution: HYSYS uses a number of configuration files to control what gets printed for each type of report datasheet. These files are all contained in the \Support subdirectory of the HYSYS installation (along with various other support files), and have the extension rdf (report definition file). There is one for each o... |
Problem Statement: The stream cutter unit operation can be installed and converged when using the OLI property package, but it cannot be used to switch between the OLI property package and any other property package. | Solution: This is a limitation of the OLI package, it does not currently support the stream cutter operation functionality. Until this functionality is added, you must use a subflowsheet approach, where the subflowsheet has a different simulation basis than the main environment, which is OLI.
Keywords: stream cutter, O... |
Problem Statement: In the Design tab / Connections menu of the Depressuring-Dynamics utility the user has the option to input some metal mass in contact with the vapour and some metal mass in contact with the liquid as Correction Factors. How are they used in the Depressuring calculations? | Solution: The contribution of the metal wall to the heat losses is only taken into account if Detailed is selected as Heat Loss Model on the Heat Flux page (Design tab). The metal mass that is going to absorb part of the heat being transferred is calculated assuming cylindrical shape for the vessel with flat ends (time... |
Problem Statement: SYLTHERM 800 is not included in the HYSYS pure compound database. | Solution: SYLTHERM 800 heat transfer fluid is a highly stable, long-lasting silicone fluid designed for high temperature liquid phase operation. It exhibits low potential for fouling and can often remain in service for 10 years or more.
As a relatively new heat transfer fluid, SYLTHERM 800 is not available in the HYSYS... |
Problem Statement: </u></b>
How can I add third party tray vendor (e.g. Sulzer) information in the Tray Sizing utility?
<b><u> | Solution: </u></b>
Unfortunately this is not possible. HYSYS only supports the following tray vendor information: Koch, Glitsch and Nutter.
<b><u>KeyWords</u></b>
Tray Sizing, Tray Vendor
Keywords: None
References: None |
Problem Statement: When loading an Utilities Planner file V8.0 through Excel it is will occasionally show the following error message:
Aspen Properties: Unable to generate definition file. Aborting command,
and then followed by :
Filed to establish connection. Do you want to retry?
If you click Yes, Excel will loa... | Solution: In V8.0, the Aspen Properties file is embedded in the Utilities Planner (.auf) file. So when an Aspen Utilities simulation is loaded, it calls Aspen Properties via OLE automation in the background to generate the appdf. If the machine is slow, this can time out and you will see the error shown. This effect c... |
Problem Statement: What is Use Spreadsheet operating mode (Design --> Heat Flux --> Heat flux parameters) and how can I use it to model the heat flux to the vessel being depressurized? | Solution: The Use Spreadsheet option refers to the duty spreadsheet of the dynamic depressuring utility. This spreadsheet can be accessed by clicking the View Spreadsheet button on the Design --> Heat Flux page if the operating mode selected is Use Spreadsheet or by going inside the dynamic depressuring utility flowshe... |
Problem Statement: How can I take a side draw from a tray and set out to a stage below? For a better understanding of the procedure, this | Solution: document presents an example on how to take all the liquid from tray 6 and set out to the tray 7 in an Atmospheric Crude Tower.Solution Add a new specification into the Column. You must select the Column Liquid Flow spec. In the Stage option you will select the tray you want to take the side draw. As Spec Val... |
Problem Statement: How do I resize Stream / Unit operation tables on the PFD? | Solution: It is not possible to use the drag option to enlarge or reduce the size of PFD tables. The workaround is to resize the fonts on the table which will subsequently resize the table.
The work flow is as follows:
Highlight the table to be resized--> On the Ribbon tab click on Format --> Click on Edit --> Then se... |
Problem Statement: What are the new features added in Aspen Utilities Planer V7.3 | Solution: Several new features are added to Aspen Utilities Planner V7.3 to improve the user experience.
1. Support hierarchical flowsheeting environment - Aspen Utilities Planner now supports ACM hierarchical block in the optimization. User could add any layer of hierarchies in the flowsheet in modeling complex ut... |
Problem Statement: Is there a quick way of hiding multiple objects on the PFD or all the objects of one type? | Solution: This can be done by first selecting multiple objects on the PFD using the 'Select Objects ...' function and then hiding them.
Right click on the PFD, choose 'Select Objects ...' On the list that appears select all the objects you want to hide. You can use the usual Windows selection keys, e.g. Shift and click... |
Problem Statement: I added some user properties in the basis/oil environment. How do I see them in the stream property view for all the streams? | Solution: If you are interested in seeing your user properties in the stream property view for all the streams, please follow the steps below:
From Tools menu, select Correlations.
On the Correlation Manager view, under Available Correlations property box, click on the plus sign beside Clone correlations group.
Select ... |
Problem Statement: Does PIPESYS predict the temperature profile close to the pipe wall - not the bulk temperature? | Solution: PIPESYS predicts the bulk temperature profile, not the temperature profile across the pipe diameter. You would need a 2D or 3D finite element program to calculate the temperature close to the pipe wall.
Keywords:
References: None |
Problem Statement: In Aspen HYSYS Dynamics, are column-trays Theoretical or Actual? | Solution: HYSYS trays in dynamics are actual 100% efficient trays. In other words, when it comes to thermodynamics the trays act as theoretical trays, and when it comes to hydraulics the trays act as actual trays. To make them truly actual trays, you need to specify the efficiency, which then becomes a flash efficiency... |
Problem Statement: I get the error Error 0: Cannot find a security key on the serial port of this computer but my key is there. What is wrong? | Solution: For HYSYS 2.2.2 and earlier:
This error message is telling you that HYSYS is having problems seeing the key because:
It's not attached to the computer properly. Check your cables or gender changers. We have seen many instances where the cable connecting the key to the computer was faulty.
There is a problem ... |
Problem Statement: Can Multiple Aspen Utilities Models be run on a single Aspen OnLine Server? | Solution: Yes, multiple Aspen Utilities models be run on a single Aspen OnLine server.
Aspen Utilities configuration items regarding the location of the Profile, Tariff, Interface, and Demand Databases, as well as the location of the Optimization Model file, are configured at an application/PC level.
As such, if a user... |
Problem Statement: How Temperature Correction Factor is calculated in Gas Turbine? | Solution: Here are some of the general equations used.
PowerTCorrection = (TAirin ? RefTemp) * K1Power + K2Power
ExhaustFlowTCorrection = (TAirin ? RefTemp) * K1ExhaustFlow + K2 ExhaustFlow
HeatConsTCorrection = (TAirin ? RefTemp) * K1HeatCons + K2HeatCons
dExhaustTempTCorrection = (TAirin ? RefTemp) * K1 ExhaustTemp... |
Problem Statement: Why actual liquid flow value in table or workbook showing empty in case of two liquid phase streams? | Solution: If you import/add variable actual liquid flow in spreadsheet, show table view or in workbook it will show empty in case of stream with two liquid phases even though it shows value in property view of the stream. Since, there is a two liquid phase formation, actual liquid flow data is linked to phase actual li... |
Problem Statement: How do I create a Surge Controller in Aspen HYSYS? | Solution: The Surge Controller in Aspen HYSYS is a special type of unit operation and must be added by clicking the Create Surge Controller button on the Dynamics\Specs page of the associated compressor.
If the compressor associated with the surge controller is subsequently deleted, the surge controller is automaticall... |
Problem Statement: When a duty stream is attached to a separator in dynamics how is the duty split between the phases? | Solution: There are several options which depend on the settings in the separator.
If there is no heat loss, the energy stream is fed directly into the separator equilibrium flash and is not applied to any bypass material which exists if effciencies are being used (i.e. efficiencies less than 100%). The bypass phases a... |
Problem Statement: When defining the ambient temperature for a buried pipe, what should I enter? | Solution: For buried pipes, you should enter the ambient temperature as the ground temperature at surface level.
Keywords: ambient, temperature, pipe segment
References: None |
Problem Statement: Why does the PID Controller report the PV up to 7% outside the PV range? | Solution: For example in the attached case the controller range is set to 0 to 100 bar, the PV is reported as 107 bar, and the pressure in the stream (the source for the PV) is 110 bar.
This is intentional, to allow the user to see small PV overshoots just outside of the PV range. However, internally the controller alg... |
Problem Statement: What are the equations behind Dynamic column hydraulic calculations? | Solution: When running a distillation column in Dynamics, several parameters are displayed on the Performance / Hydraulics page of the tray section (in the Column Environment). Here below is explained how all those fundamental variables are calculated.
Bulk Liq Volume is calculated by multiplying the area of the tray s... |
Problem Statement: What does L, H, V, phases stand for in the properties table utility? | Solution: L - indicates a light liquid (hydrocarbon rich) phase
H - indicates a heavy liquid (heavier hydrocarbon or aqueous) phase
V - indicates a vapour phase
Keywords: hydrocarbon, properties, utility, table
References: None |
Problem Statement: How can I force an extension to resolve using code outside the extension? | Solution: There are a number of ways to accomplish this
Ignore and Unignore the extension via code
There is no defined object type for an extension operation. However if you obtain an object for your extension using the Object variable type and then set up a watch on this operation you'll see it has a number of propert... |
Problem Statement: Even if the units in HYSYS are set to Field units, the specified frequency (number of fins per unit length) will be considered in HYSYS as fin/m (NOT fin/in).
To verify this, switch between Field and SI units and look at the frequency at each time. It will not change. | Solution: The frequency on HTFS-ACOL/ Extended Surface page and HTFS - MUSE/ Fins page always has to be specified as fin/m even though the units are set to Field in HYSYS.
Keywords: Frequency
Fin
ACOL
HTFS
HYSYS
Extended
Surfaces
MUSE
Link
Units
Field
SI
References: None |
Problem Statement: Aspen Utilities Planner generates error message Unhandled exception…. What does this mean and how can this be avoided? | Solution: This error message is generated when an unsupported character such as slash or a space is used in a block name. In this case the Aspen Custom Modeler (ACM) replaces the block name internally with Blocks (“….”). Such as a name UITILEXP.MIP/XYXSOLV is replaced by UTILEXP.BLOCKS(“MIP/XYZSOLV”) which has more tha... |
Problem Statement: How do I configure the new OLGA link extension and add OLGA Link, specify connections, set up the OLGA server, expose variables, and perform other additional steps? | Solution: The document attached will cover all of the steps required for setting up and configuring the new OLGA Link extension. You will learn how to add an OLGA Link, specify connections, set up the OLGA server, expose variables, and perform other additional steps.
Keywords: Dynamic simulation, dynamics, transient, H... |
Problem Statement: Normally you can register extensions in HYSYS from Tools | Preferences | Extensions tab. However, if the extension name includes an underscore, it may cause a corruption in the information which is saved about the extension in the registry either because the extension's name is broken or because the ... | Solution: If you are unable to modify the PROGID name, then it is possible to successfully install the extension using the regextn.exe file with the steps outlined below.
1. Save the extension files to a sub-older under:
C:\Program Files\AspenTech\Aspen HYSYS V7.1\Extensions
2. Save the regextn.exe to the same location... |
Problem Statement: Dynamic Extensions - a possible alternative to User Variables for speed critical applications | Solution: It is possible to use User Variables in Aspen HYSYS Dynamics mode, either by adding DynPressureFlowPreStep() or DynCompositionPreStep() events to fire the code every pressure or composition step, or using a VariableChanged() event procedure to respond to changes in the value entered into the User Variable.
In... |
Problem Statement: When the “All variables” table for any type of blocks or streams is openend, the Value and Spec Attributes (columns) are missing. How can I fix this issue? | Solution: When some columns are not shown in the table it can be because the value was not selected to be displayed in the default specification when opening Aspen Utilities Planner or other ACM family products.
Firstly one has to check if the variables are selected. To do that, right click on the open table and sele... |
Problem Statement: As there is no facility in HYSYS to get the list of all the components (associated with a fluid package in a given case) and their properties, how do I get the components (list) and their properties from HYSYS? | Solution: The attached Excel macro prints all the components (associated with the first fluid package of the selected case) and their properties (Critical Pressure (kPa), Critical Temperature (C) and Accentricity) to the excel sheet. Other properties can be included in the list by editing (adding a line) the code in mo... |
Problem Statement: When I try to import variables from the PIPESYS unit operation extension into the Aspen HYSYS Spreadsheet, the nomenclature is very confusing. Which are the variables that can be imported from PIPESYS to the Spreadsheet in Aspen HYSYS? | Solution: Since PIPESYS is a third party extension, when the Aspen PIPESYS unit operation is selected in the Spreadsheet in Aspen HYSYS, there are just a few variables that are enabled to be imported from the available variable list.
From these variables, the ones that are truly accessible are those used in the summary... |
Problem Statement: How Gas Turbine Air temperature and Humidity correction are calculated in Aspen Utilities? | Solution: The HumidityCorrection is calculated using the following equation :
HumidityCorrection = Humidity*K1Humidity + k2Humidity ;
where K1Humidity and K2Humidity are constants
The Air Temperature correction is calculated as :
PowerTCorrection = (TAirin-Tref)*K1Power + k2Power;
where K1Power and K2Powe... |
Problem Statement: Can HYSYS calculate interfacial tension between two liquids? | Solution: HYSYS does not calculate the interfacial tension between two liquid phases. HYSYS does not do this because there is not, to our knowledge, a good scientific (or even engineering) understanding of this phenomenon. If you have data or a correlation for some specific system, it would be easy to implement that as... |
Problem Statement: Can I check if a column has converged using Automation? | Solution: Yes, the ColumnFlowsheet object has a boolean property (CfsConverged) which can be checked to see if the column has converged. The code example below illustrates this.
To use the code below open up HYSYS with any case that contains a column, paste the code into the VBA editor in Excel, set the code to referen... |
Problem Statement: How do I model a gas turbine in HYSYS? | Solution: The attached HYSYS case demonstrates how to model a gas turbine in HYSYS.
In the attached model, the combustion process is simulated using a Gibbs equilibrium reactor. The air-fuel ratio (mass flow of stream Air divided by the mass flow of stream Combustibles) is adjusted to fix the turbine feed temperature a... |
Problem Statement: Is therminol included in HYSYS component library? | Solution: The heat transfer fluids known as therminols can be found as THEOLs, e.g. THEOL-55, THEOL-75 in HYSYS component library.
Keywords: Therminol, Theols, heat transfer fluids
References: None |
Problem Statement: What version of Aspen Plus is required with Aspen Utilities Planner 2004.2? | Solution: Aspen Utilities Planner 2004.2 will only work with Aspen Plus 2004.1.
Aspen Plus 2004.1 is found on the aspenONE 2004 update 1 and aspenONE 2004 update 2 media.
Keywords: compatible update
References: None |
Problem Statement: What is the minimum amount of information required to characterize an oil in Aspen HYSYS? | Solution: The only information you need to provide is a distillation curve (TBP, ASTM D86, ASTM D1160, ASTM D2887, or EFV). If you do not have any distillation data then Aspen HYSYS requires two out of these three properties: Molecular Weight, Standard Density or Watson UOP K. From these properties Aspen HYSYS will cal... |
Problem Statement: What is the temperature approach option in the equilibrium reaction, and how can it be used to modify the effluent composition from an equilibrium reactor? | Solution: The temperature approach option in the equilibrium reaction allows the user to adjust the equilibrium constant of a reaction by offsetting the temperature at which it is calculated. The approach value is an empirical adjustment that is used to modify the extent of reaction at equilibrium when the value of the... |
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