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Problem Statement: What are the names of the Aspen HYSYS unit operations to be used in VBA? | Solution: The following table presents the list of the names used by Aspen HYSYS to define the unit operations.
Visible Type Name
TypeName
Separator
flashtank
3 Phase Separator
sep3op
Tank
tankop
Cooler
coolerop
Heater
heaterop
LNG
lngop
Heat Exchanger
heatexop
Compressor
compressor
Expander
expandop
Pump
pumpop
Valve
... |
Problem Statement: How do I model a packed tower in Hysys? | Solution: The column solves using theoretical stages of separation. Therefore, you must use a HETP approach.
In the sizing utility (Tools | Utilities | Tray Sizing), you can size and rate packed towers and select packing types.
Keywords: HETP, tray sizing, packing
References: None |
Problem Statement: My environment is a Windows 7 machine and it is mandatory to use Aspen Engineering Suite V7.1 (AES) and older versions of the AES but after the installation we are encountering some runtime errors. | Solution: Windows 7 x86 support was introduced with AES v7.2 and Windows 7 x64 support has been introduced with version 7.3 of the AES v7.3. This means all the the defects related to the compatibility with new operating systems shown by older versions have been corrected in these newer versions of the Aspen Engineering... |
Problem Statement: How do I create a copy of the 'customized materials streams tab' in the same workbook? | Solution: To create a copy of the customized material streams tab in the same workbook first you have to open the HYSYS workbook by clicking on the workbook icon (CTRL+W). In the menu bar go to Workbook | Export | Pages... and select the page of interest to export and save the file on the computer. Now import the saved... |
Problem Statement: The analysis of water samples from laboratory is given in cations and anions. Can cations and anions be used directly as input? | Solution: Currently cations and anions cannot be used to define electrolytes using HYSYS with OLI . While OLI electrolyte package has this capability, this is a limitation of HYSYS - OLI interface.
The user has to convert the cations and anions to apparent species.
Keywords: cation, anion, electrolyte
References: Non... |
Problem Statement: Can I link compressor speed to some property of the compressor inlet? | Solution: Yes it is relatively easy to do this via a User Variable. The enclosed user variable (code below) links compressor speed to inlet molecular weight - through a simple linear relationship - however this could be made more complicated or it could be linked to another property, for example feed molar density usin... |
Problem Statement: How do I configure a surge controller for a single speed compressor? | Solution: A compressor with single speed motor has only one surge point. Therefore no regression is necessary to generate the surge line. The single surge point can be represented by the surge control parameters as shown in the following screenshot.
For a single speed compressor you only need to enter Parameter B and t... |
Problem Statement: How can I control compressor speed? | Solution: HYSYS vesions 2.2 to 3.2
A PID controller cannot directly manipulate Compressor Speed, but you can always use a spreadsheet in between. Here is what you need to do:
1- Connect your controller output to a dummy operation (selector block is a common choice, since it can handle multiple inlets)
2- Import the con... |
Problem Statement: How can I export a HYSYS workbook to Excel? | Solution: You have a number of options here. The simplest one would be to use the Text To File option. This saves the data from the workbook in a comma delimited ascii text file which can then be opened and formatted in Excel. To do this, open the workbook and select File - Print from the main toolbar. When the print d... |
Problem Statement: What does the Maximum Iterations field affect? | Solution: Maximum Iterations: This sets the maximum number of iterations that the MASS solver is allowed to perform regardless if theSolution is converged or not when this number is hit.
Keywords: MASSBAL, maximum iterations
References: None |
Problem Statement: What does the value in the | Solution: Phase field mean?Solution
Setup - will be displayed during the initial formulation of the optimization problem and construction of the required matrices.
Following this, a feasible point search may be conducted if required, then once a feasible point is established, the optimizer enters an optimization phase ... |
Problem Statement: If my Hydrocarbon phase is heavier than my Aqueous phase, why is it still going to the Light liquid Phase connection on a 3 phase separator? What about Dynamics? | Solution: In Steady State HYSYS decides which phase to go which stream only using the phase type definition and doesn't consider the density, so an aqueous phase will always go to the heavy liquid phase stream, even if it has a lower density.
Dynamics on the other hand acts much like a real separator, where the stream ... |
Problem Statement: What are Script files and how do I use them? | Solution: If you do a repetitive task that you want to automate, the easiest way (particularly without programming knowledge required) is to record a script (Tools menu, Script manager, New). This will generate a file (Script file with extension .scp) that contains special Hysys Language instructions detailing what you... |
Problem Statement: How do I multiply the input variables such as flow rate in Aspen HYSYS? | Solution: To multiply the input (specified) variables, the spreadsheet is used in Aspen HYSYS. In a spreadsheet, you first need to specify the variables that the you want to multiply rather than specifying these variables directly in the streams initially. This is done to prevent consistency errors. Now from the spread... |
Problem Statement: Can I Design/Rate a Heat Exchanger with in HYSYS using Aspen Tasc+? | Solution: New in Aspen HYSYS 2006.5 there is a new HYSYS utility called Tasc+ Design/Rating Utility under the Tools | Utilities (Ctrl+U), which is used to design, rate or evaluate maximum fouling for any existing exchanger in the Aspen HYSYS flowsheet.
? The new utility can use either the specified process co... |
Problem Statement: How do I add my own equation for HETP for my custom packing to HYSYS? | Solution: In HYSYS 2.4, functionality was introduced which allows you to export a value from the spreadsheet to the HETP value in the Design Tab/Specs page of the Tray Sizing utility. This means that you can create your own expression for HETP in the spreadsheet, and export that value to the tray sizing utility.
Keywor... |
Problem Statement: How do I change the Calculation Execution rate for a specific unit operation alone? | Solution: By default all unit operations follow the default calculation execution rate defined in the Integrator menu. Still the user can override that by adding a Workbook page for each operation type he desires, and including on it the following variables:
1- Use integrator period
2- Composition period
3- Energy peri... |
Problem Statement: How do I print the data as I see it on my screen? Print Datasheet does not give me the option. | Solution: For any operation, if you place your mouse over the blue bar (Window default colour) at the top of the window and right click, you'll get the option to Print Datasheet. If you do not see an option to print what you want, you can Print Window Snapshot. This is under the File menu. Printing a Window Snapshot wi... |
Problem Statement: Is it possible to change the results display units when using the HTFS Engines model in an Aspen HYSYS heat exchanger? | Solution: To change the units displayed on the HTFS-TASC results page, navigate to the HTFS-TASC | Methods pagetab and click on the OTHER radio button. A drop-down menu is provided on this form where the user can change the unit of output field.
Keywords: unit, measurement, HYSYS, HTFS, TASC
References: None |
Problem Statement: I am simulating a Distillation column with a total condenser. The distillate temperature is significantly different than what I expect. What could cause this? | Solution: The presence of non-condensable components (even at minute quantities) in the system can strongly influence the condenser temperature. If the upstream unit operations are 'slipping' non-condensable components to the distillation column, the distillation column condenser type should be changed from total conde... |
Problem Statement: How do I use something like | Solution: The most straight forward way is to add a Balance operation with a Mole and Heat balance type to keep the flows and enthalpies the same. Then add a Set operation to set one of the conditions (such as pressure) of the mirror stream as the original one (The balance keeps the total energy the same, but not the c... |
Problem Statement: How do I know if my network key has different family codes? | Solution: You can run the Findnet.exe utility on the computer upon which the keys are stacked to determine if the keys have different family codes. If this utility shows that both keys are both C-CG, they're not stackable. The second one will need to be C-CF or something else other than C-CG.
Keywords: family code, net... |
Problem Statement: What does the compressor surge curve do? | Solution: The compressor surge curve is used by HYSYS to introduce disturbances in the compressor if the flow drops below the surge limit. This is not the curve used for predicting the Surge Flow for the Surge Controller.
For more information about how the Surge Controller works see the HYSYS Dynamic Modeling Manual, o... |
Problem Statement: Can I access Stream and Operation Object Notes via OLE Automation? | Solution: Object Notes are found on the Notes page of all streams and operations in HYSYS (on the Worksheet tab of streams and the Design tab of Operations). These notes can be entered with formatting (fonts, colours, etc.). HYSYS stores these notes in RTF (Rich Text Format) form. These notes can be accessed via OLE Au... |
Problem Statement: I get a warning that the Pipe angle out of range of pressure drop correlation - what does it mean? | Solution: The Gregory Aziz Mandhane correlation for two-phase flow can only be used up to an elevation change of half the length of the pipe (30 degree angle).
Keywords: pipe segment, angle out of range
References: None |
Problem Statement: How do I set up the RTI Server functionality (which is used for case collaboration) ? | Solution: The server machine can be any machine on your network. It will be the host for messages sent between instances of HYSYS. These messages will contain data published from cases which you wish to link.
Select a machine to act as a server. Set up the Server machine:
1. Share the RTISupport sub-directory loc... |
Problem Statement: Sample example for Unit Operation Extension in Visual Basic .NET | Solution: Unzip the attached files, load theSolution into Visual Studio 2005, build it. Then copy the EDF file to the same folder as the generated DLL file (should be in generated bin folder).
Now run Aspen HYSYS 2006, register the extension, close Aspen HYSYS, and open it up again, the extension should be ready for us... |
Problem Statement: Why I can not change blend name? If I type a new name, HYSYS changes it back to the original name. | Solution: The blend name has to be 12 characters or less. HYSYS gives this message in the trace window. If you give the name within this limit HYSYS will accept the blend new name.
Keywords: blend, name, can not change
References: None |
Problem Statement: When using the OLI package, why do I only see a few components in the component list in the Basis Environment, when I actually have a lot more in my simulation case? | Solution: What you see in component list view in the Basis Environment are the molecular species you selected from the pure component database. Once the Initialize Electrolytes Environment button is pressed, Aspen HYSYS will generate a group of additional components based on your selected components from OLI chemistry ... |
Problem Statement: How do I automate the adjustment of my valve size in HYSYS.Process or steady state? | Solution: The valve sizes are used in HYSYS.Plant (dynamic operation) to calculate the pressure-flow relationship for pressure drops. They do not have any bearing on calculations in Steady State. If you want to vary the size of a valve to achieve a certain pressure drop for a given flow in steady state, the adjust oper... |
Problem Statement: How can I change the Integrator Step Size via OLE Automation? | Solution: The Integrator object has a .StepSize property however this returns a read-only double. In order to set this value you need to use a Backdoor variable (see below). Note this will only work when the Integrator isn't running.
Paste the following code into Excel's VBA editor (or similar) and press the Run button... |
Problem Statement: How much information do I need to provide to solve a heat exchanger using HTFS+ link in HYSYS?
I have putting data all day long. Still my heat exchanger has not converged? What is the minimum number of data I have to provide to make the heat exchanger to solve? | Solution: Six data/specifications. 5 data under Exchanger | Exchanger Data | Basics: (Shown in Figure 1)
u Shell Diameter
u Tube Outside Diameter
u Tube Length
u Hot Side (It means location of the hot fluid tube or shell side?)
u Number of Tube Passes
1 Data to set baffle type as unbaffled... |
Problem Statement: How can I add an expander or a reducer in a pipeline? Is there a way to specify its angle? | Solution: Append or insert a segment and select Swage: Abrupt or Swage 45 in Fitting/Pipe (the default type is Pipe, however you can change this via the associated drop down list). The inlet and outlet diameter of the Swage will be determined based on the upstream and downstream connections.
Note that the swage ang... |
Problem Statement: I'm trying to import a HYSYS cooler into ACX but I can't see it in the list to select when I'm in ACX with the HYSYS case running in the background. | Solution: You probably need to re-register the acxhysys.dll. To do this:
Go to the DOS prompt and type in: regsvr32 <pathname><filename> (e.g. if you have ACX installed at C:\acx, you would type in: regsvr32 c:\acx\acxhysys.dll)
Once the dll has been registered successfully, shut down ACX and HYSYS (if you haven't alr... |
Problem Statement: Why does my pump curve display a different flow unit than was specified in the pump curve data? | Solution: On the Rating | Curves pagetab, click on the Plot Curve button to open the Pump Curves Profiles window. Right click on the plot and select Graph Control from the ensuing menu. In Graph Control window, click on the Axes tab and select Flow from the variable list on the left side of the frame. Next, deactivate ... |
Problem Statement: Mass isn't being conserved across my column, and some of the components seem to have disappeared altogether. Why might this be happening? | Solution: This is likely to be caused because the column is using a fluid package with different components to the fluid package for the main PFD.
Check which fluid package each flowsheet is using by looking at the Fluid Packages tab of the Simulation Basis Manager (Flask icon on the button bar, or Ctrl + B).
If the co... |
Problem Statement: The HYSYS Manual indicates the availability of external Exchanger Rating software like STX. Do I need something like that to do my rating, or can I use HYSYS alone? | Solution: HYSYS can do the rating based on its own internal models. The external software (eg STX) is a more rigorous option.
Keywords: Heat Exchanger
References: None |
Problem Statement: How the heat balance is calculated for a distillation column? I have a converged column. The column's heat is not balanced. | Solution: Heat balance is a default specification. For a converged column, the heat should be balanced.
Here is how it calculates.
Method 1:
Calculate how much heat difference between the outlet and inlet streams (Heat of outlet stream - heat of inlet streams). If it is positive, column feed materials have consumed h... |
Problem Statement: What algorithm is used by the HYSYS SQP optimizer? | Solution: The Hyprotech SQP is a sequential quadratic programming (SQP) algorithm incorporating an L1-merit function and a BFGS (Broyden-Fletcher-Goldfarb-Shanno) approximation to the Hessian of the Lagrangian.
The algorithm features step size restriction, decision variable and objective function scaling, a basic watch... |
Problem Statement: Can Aspen HYSYS provide reservoir inflow performance data to Petex IPM applications? | Solution: IPM is the whole suite of Petex applications; the experience we have with Petex is on GAP and Resolve. There is a link to GAP as part of Aspen HYSYS Upstream for steady state hydraulics calculations. Here GAP works as an Aspen HYSYS unit operation in the upstream palette.
Petex RESOLVE links into Aspen HYSYS ... |
Problem Statement: How do I control the position of Inlet Guide Vane curves in a centrifugal compressor? | Solution: Inlet guide vanes have been used to change the capacity of centrifugal compressors. The Inlet guide vanes are pre-swirling the inlet stream to help minimize power consumption, increasing efficiency near maximum capacity.
The enclosed Aspen HYSYS dynamic simulation (S117509.hsc in HYSYS v3.4) illustrates the m... |
Problem Statement: How are the Dynamics tray efficiencies related to the Steady State ones? | Solution: Steady State HYSYS uses modified Murphree Tray Efficiency, while in Dynamics HYSYS uses vapour bypass. Steady State tray efficiencies don't mathematically relate directly to Dynamic efficiencies. Of course they both have the same trend (reducing SS or Dynamic eff. will reduce the column performance), but for ... |
Problem Statement: How is the volume for calculating of kinetic reaction is calculated for a packed and trayed column for Reactive Distillation? | Solution: liquid holdup volume = tray area*weir_height
vapor holdup volume = tray area *(tray spacing - weir height)
Note: The calculation is same for trayed and packed tower. To access the variable Go to the column environment ll Double click on the column ll Go to the rating Tab and Sizing page
Keywords: Kinetic reac... |
Problem Statement: How do I know what the buttons on the Object Palette represent? | Solution: Move the mouse pointer over the desired button in the Palette. A fly-by description appears in the Status Bar at the bottom of the DeskTop. Note: This also works for buttons in the Button Bar.
Keywords:
References: None |
Problem Statement: What Valve Types does HYSYS have? | Solution: HYSYS has three different valve types:
Linear:
%Cv = OP
Quick Opening:
%Cv = [(OP/100)^0.5]*100
Equal Percentage:
%Cv = [(OP/100)^3]*100
Keywords: Valve
References: None |
Problem Statement: What is the diagnostic print level? Where can I find the diagnostic output file? | Solution: During the optimization calculations, detailed data can be continuously output to a text file, which can be used for diagnostic work with the optimizer. This file is written into the HYSYS installation directory.
The diagnostic print level controls the amount of detail which is written into this file.
When us... |
Problem Statement: What options are there for linking Aspen HYSYS data to Microsoft Excel? An Overview | Solution: There are a number of options for transferring data from Aspen HYSYS into Excel. These options are described here. Our recommended option for plant operations and during conceptual design engineering is the Aspen Simulation Workbook. More information is found below and inSolution id#118330.
Copy/Paste (Link)
... |
Problem Statement: Is it possible to rotate three dimensional plots generated by a case study? | Solution: Right click on the plot and select the Graph Control option. Use the View Control arrows to rotate the plot.
Activating the Always Apply checkbox forces the plot to update automatically whenever the Angle or Aziumth are changed. If this checkbox is not active, the Apply button must be used in order to inv... |
Problem Statement: Why does the liquid density remain unchanged when the calculation method is changed? | Solution: It is probably because you only have changed the calculation method for liquid density but not for liquid volume. For example, if you want to use the COSTALD method to represent liqiud density, you need to select this model for both MolarDensity AND MolarVolume for liquid phase.
Keywords: liqiud density, COMT... |
Problem Statement: How is the Heat of Vapourization estimated for a Hypothetical Component? | Solution: Several methods are available to estimate the Heat of Vapourization of Hypothetical Components in HYSYS (Simulation Basis Manager Property View, Hypothetical tab, View Group, Estimation Methods button). These methods actually change how the Cavett Heat of Vapourization Coefficients are estimated for the Hypot... |
Problem Statement: Is it possible to run a case study starting with the highest value? | Solution: A case study can be run in reverse order by activating the Step Downward option found on the Independent Variables Setup pagetab.
Keywords: databook, case, study, descending
References: None |
Problem Statement: What does the Calculate wax formation temperature checkbox do? | Solution: The Calculate wax formation temperature checkbox allows you to select whether the deposition model is used to calculate the initial wax formation temperature or the cloud point for each pipe element when performing the deposition calculations.
If activated, the results appear in the Profile page of the De... |
Problem Statement: Is the holdup in the pipe in a valve before or after the valve ? | Solution: The holdup in the valve and pipe is defined as the holdup of whatever is activated in the operation. i.e. it could be pipe only or valve only or pipe and valve.
This then raises the question that if the valve is shut what happens to the holdup? The answer is that it does not change. So the hold up is AFTER th... |
Problem Statement: Can I change which tray section a tray sizing utility points to via OLE? | Solution: Yes although the way of doing this involves a 'backdoor method'.
N.B. Backdoor methods are only recommended when there is no other alternative, the internal HYSYS monikers used to access properties which have not been wrapped for access via normal OLE may not remain constant between versions so care should be... |
Problem Statement: Under Tools | Preferences | RTI Server, what is the RTI Server Login Name? | Solution: This name is displayed in place of a GUID if you use the message window to discuss the case with your co-collaborators.
Keywords: RTI Server Login Name
References: None |
Problem Statement: Why will my column not solve with a subcooled condenser? | Solution: The error message that appears, the column cannot be solved completely with a subcooler condenser with a non-zero vapour stream flow indicates that you had implemented the subcooling option on a condenser which includes a vapour outlet. This feature will only allow the user to specify subcooling on a total co... |
Problem Statement: What is the 'Weeping Factor' in Aspen HYSYS and how do I use it? | Solution: In the column subflowsheet, open the Tray Section property view, go to Rating | Sizing | Weeping Factor.
The Weeping Factor is used to add the weeping effect adjusted term to the calculated liquid height over weir:
hghtOverWeir += weepFactor * 2.0 * weepDp * (1.0 - vapToAboveKAvg);
So, when the Weeping Factor... |
Problem Statement: Is the temperature predicted by the Hydrate Formation utility related to hydrate formation or dissociation? | Solution: The Hydrate Formation utility in Aspen HYSYS predicts hydrate formation temperature, not hydrate dissociation temperature.
Keywords: hydrate, utility, prediction, hydrate, formation temperature, dissociation temperature
References: None |
Problem Statement: How does the MASSBAL subflowsheet in HYSYS work? | Solution: A MASSBAL Object in HYSYS is a Flowsheet Object (much like a template object) that holds all streams/unit operations subjected to the equation based solver.
The MASSBAL application uses a graphical interface to create a DAT file. This is essentially a text file containing the streams, unit operations, connect... |
Problem Statement: I loaded my converged case in HYSYS v2.1.1 to v2.2 and now I get inconsistencies generated. Why? | Solution: There have been a number of changes to HYSYS v2.2 which required a v2.1.1 case to re-converge when loading it into HYSYS v2.2 eg stream Cp/Cv is now calculated rigorously. HYSYS v2.2 is now much more rigorous when checking for inconsistencies within a case. If you now get inconsistencies which were not presen... |
Problem Statement: Is there a difference in the handling of Streams using the MASSBAL solver as compared to the HYSYS Sequential Modular solver? | Solution: The concept of the Stream in HYSYS is different from that in MASSBAL. HYSYS streams are flowsheet objects with properties/characteristics (and can exist without unit operations) whereas MASSBAL streams are connections between unit operations. Special streams known as SOURCES feed into unit operations and are ... |
Problem Statement: What does the Restore File Associationsoption do? | Solution: Starting from version 2006, a standard installation of Aspen HYSYS or Aspen RefSYS will add an option called Restore File Associations to the Start menu on your computer, as shown in the attached image file. To understand what this option does requires a bit of background information.
For Aspen HYSYS to be ... |
Problem Statement: Can I specify actuator fail position for a valve in dynamics? | Solution: Yes, This can be done on the Dynamics Tab, Actuator Page of the Valve. Note that using a Fail Open (air to close) valve reverses the action of the attached controller.
However, you must have the HYSYS Fidelity license enabled in order to modify these parameters. To enable this license, go to the Options tab o... |
Problem Statement: If I flash a stream through a valve, the outlet temperature is different to the case where I run the depressuring utility to the same final pressure. | Solution: The valve operation is assumed to be an isenthalpic process in HYSYS, so the temperature of the value outlet stream is obtained by doing P-H flash on the outlet stream.
However, for a dynamic depressuring, the final temperature will be different for each of the operation modes. It will be different under fire... |
Problem Statement: What are the Calculation Execution Rates on the integrator window options tab? | Solution: The Calculation execution rate are the periods of different types of calculations. The smaller the number the slower the calculation. For example the defaults in the Integrator mean that the Pressure/Flow equations will be solved every time step, control and logic operations will solve every 2 time steps, ene... |
Problem Statement: The liquid level in my vessel is 3%, and I'm getting some vapor in bottom liquid stream, Why is that? | Solution: The nozzles in Hysys are side ways, which means that if the liquid level drops such that it becames less than the nozzle diameter, the product stream will be two phase.
Keywords: Separator, Level, Nozzle
References: None |
Problem Statement: What conditions cause the message Warning ... - Solid particles (e.g. ice pellets) have been detected inside pipe? | Solution: This warning is displayed when either:
The temperature somewhere in pipe segment is below 0C AND water is present in the stream
OR
The inlet stream has a solid phase
If hydrates are likely to be a problem in your system you should check that the pipe temperature profile always stays above the hydrate formatio... |
Problem Statement: How to generate a plot of a variable or a property?
How to plot a variable (flow rate, composition etc) or a property (viscosity, density, enthalpy etc) with respect to pressure and /or temperature? | Solution: User can generate a property or a variable curve with respect to pressure and / or temperature using Property Table Utility.
Double click on a stream || Attachments || Utilities || Create || Property table || Add Utility
Specify temperature and pressure in state or incremental form
Under Design (left hand sid... |
Problem Statement: After changing anything in HYSYS through OLE, VBA waits for HYSYS to finish solving. Can I regain control in my VBA code and monitor HYSYS as it solves?
What do I do to gain back control over my VBA application while the HYSYS solver is running? | Solution: Generally VB/VBA will wait till HYSYS finishes solving before it starts executing the next line. However if the .CalculationTimeOut property of the HYSYS application object is set to a low number (eg 1) then control will return to the VB code straight away.
If multiple changes are being made to HYSYS using VB... |
Problem Statement: What does the Maximum Iterations field affect? | Solution: Maximum Iterations: This sets the maximum number of iterations that the MASS solver is allowed to perform regardless if theSolution is converged or not when this number is hit.
Keywords: MASSBAL, maximum iterations
References: None |
Problem Statement: What does the value in the | Solution: Phase field mean?Solution
Setup - will be displayed during the initial formulation of the optimization problem and construction of the required matrices.
Following this, a feasible point search may be conducted if required, then once a feasible point is established, the optimizer enters an optimization phase ... |
Problem Statement: If my Hydrocarbon phase is heavier than my Aqueous phase, why is it still going to the Light liquid Phase connection on a 3 phase separator? What about Dynamics? | Solution: In Steady State HYSYS decides which phase to go which stream only using the phase type definition and doesn't consider the density, so an aqueous phase will always go to the heavy liquid phase stream, even if it has a lower density.
Dynamics on the other hand acts much like a real separator, where the stream ... |
Problem Statement: What are Script files and how do I use them? | Solution: If you do a repetitive task that you want to automate, the easiest way (particularly without programming knowledge required) is to record a script (Tools menu, Script manager, New). This will generate a file (Script file with extension .scp) that contains special Hysys Language instructions detailing what you... |
Problem Statement: What is a split range controller? | Solution: A Split Range Controller allows you to split the Output from the Controller to two different valves. The Range of the Output dictates which Output device or valve receives the signal. The split ranges can overlap so that the OP may be going to both output devices at the same time.
Keywords: split range; contr... |
Problem Statement: Can I use Fortran with Aspen HYSYS? | Solution: Aspen HYSYS uses an object model for communicating with extensions. Whether or not it is possible to call up Aspen HYSYS physical routines from a Fortran executable depends on the capabilities of the version of Fortran used (Object Linking and Embedding (OLE) or Component Object Model (COM) compliant or not).... |
Problem Statement: How do I copy a stream between cases? | Solution: First ensure that both cases are using a Fluid package that has the same components. One way of doing this is to export the Fluid Package from the original case and import it into the new one.
Do this by using the Export / Import buttons on the Fluid Packages tab of the Simulation Basis Manager window (Access... |
Problem Statement: How do I get user variables from *.huv files into HYSYS and start using them? | Solution: Before a user variable can be used, it must first be imported into the case, this is done as follows:
Go to the menu option Simulation ... Import and Export User Variables
Press the Select File button and navigate to the .huv file on your computer (You may need to change the file filter, if it is currently se... |
Problem Statement: What's new in version 2006 for compressor simulation? | Solution: In the previous versions of Aspen HYSYS, the Inlet Guide Vane (IGV) control was only implemented for dynamic mode. If you have a compressor with a set of user specified IGV curves. If you change the current IGV position in steady state using Aspen HYSYS and previous versions, you will find that the actual ope... |
Problem Statement: What does the Area values indicated in the LNG, Performance Tab, Summary (Dynamics) page represent? | Solution: It represents the area for each individual layer in the exchanger, multiplied by the number of sets in the zone.
Keywords: LNG Exchangers
References: None |
Problem Statement: Hysys starts but disappears after a few second. Hysys 2004 was working fine but stopped working after installing Hysys 2004.2. Neither version works at this time | Solution:
Keywords: Re-registering SLM client, STRGXI2.DLL, solves the problem
How to Reregister STRGXI2.dll
Log on to an account with Admin privileges
Open a command line or a DOS Prompt and change folder to:
'C:\Program Files\Common FIles\Hyprotech\Shared Folder' and register the file STRGXI2.dll:
1.) C... |
Problem Statement: Can I perform equipment cost and operating cost studies using Aspen HYSYS? | Solution: Yes, a new costing feature has been added to HYSYS 2006 (this feature requires the installation of Aspen ICARUS). The new functionality allows you to perform a simple cost analysis on all or part of a flowsheet in order to evaluate relative costs as design parameters are changed.
Attached to thisSolution is a... |
Problem Statement: How does one delete the variables in Depressizing utility strip chart? | Solution: You can not directly delete the variables via the Strip Charts page of the Depressuring utility. In order to delete the unwanted variables in the strip chart, you need to access the Databook from the Tools | Databook menu item (or press Ctrl+D).
Please follow the steps below for deleting the strip chart varia... |
Problem Statement: What are cyclone, hydrocyclone (HC) and Liquid Liquid hydrocyclone (LLHC) in Aspen HYSYS and how do I use them? | Solution: The Cyclone is used to separate solids from a gas stream and is recommended only for particle sizes greater than 5 microns.
The Hydrocyclone (HC) is essentially the same as the cyclone, the primary difference being that this operation separates the solid from a liquid phase, rather than a gas phase. The solid... |
Problem Statement: For Aspen HYSYS users who are familiar with its application via OLE, please note the changes made in v2006 allow you to start different versions of Aspen HYSYS from other programs, such as Excel, via OLE. | Solution: Currently the following ProgIDs have been made available:
HYSYS.Application
This will start or activate the most current registered version of Aspen HYSYS.
If Aspen HYSYS 2006.5 is registered this will get returned.
If Aspen HYSYS 2004.2 is started up after Aspen HYSYS 2006.5 is installed, that is the one t... |
Problem Statement: Can I see the contents of more than one tab for the same stream/operation at the same time? | Solution: Yes
If you right click on the title bar of the stream/operation window and choose Open Page... Hysys will bring up a new window showing just the contents of the current tab.
Keywords: Open Page, tabs
References: None |
Problem Statement: How do I create a custom tab in the workbook? | Solution: With the workbook view open, go to the Workbook menu, and select Setup.
In the Workbook Setup view, you can Add a new tab, rename it, and include the variables that you are interested in.
Keywords: Custom workbook tab
References: None |
Problem Statement: Does the Twu-Sim-Tassone property package also include the Twu EOS alpha function included in PR-Twu? | Solution: Yes the Twu-Sim-Tassone EOS does include the same Twu alpha function as in the PR-Twu EOS.
Keywords: Twu, alpha function
References: None |
Problem Statement: What is the difference between API and API_60? | Solution: API and API_60 both refer to the same measure, however, within HYSYS, API is used to refer to the actual density of the fluid at flowing conditions, whereas API_60 is used when representing standard ideal mass density. In general, API gravity is defined as follows:
API = (141.5/SG at 60 ?F) - 131.5,
where... |
Problem Statement: How do I print tray wise composition at each stage of the column? | Solution: Tray phase composition can be displayed on the Performance | Plots page of the column. Go to the column property interface (Double click on the column) and go to Performance tab & Plots page. Highlight the Composition in the Tray by Tray Properties view. Click on View Table Command Button, a new window with C... |
Problem Statement: After running a Dynamic model for some time, can we go back to an earlier point in time? | Solution: Unfortunately, this is not possible within the current case. The recommended way to do that is save multiple copies of your model at significant and/or stable points such that you can return to them whenever needed.
This functionality is being considered for future versions of HYSYS.
Keywords:
References: No... |
Problem Statement: How can I model a vertical pipe in HYSYS? | Solution: HYSYS contains correlations which can be applied for vertical pipes in certain situations. Below is a discussion of the options available for simulation of vertical pipes.
HYSYS uses the Darcy equation for single phase flow in pipe segments, which can be used for both horizontal or vertical pipes. The Beggs a... |
Problem Statement: Can the tray section weeping calculations be disabled in Hysys? | Solution: In Hysys versions prior to 2.3 this was not possible. In Hysys version 2.3 this option was added as a check box on the Dynamic Tab of the Tray Section.
Keywords: Column, Tray Section, Weeping
References: None |
Problem Statement: Why is my liquid density different in HYSYS 3.0? | Solution: In Hysys 3.0, the Fluid Package view (Set Up page) has two new check boxes, one for using equation of state (EOS) for density calculation and the other for smoothing the liquid density. These two check boxes show up for and affect the PR, Sour-PR, SRK, and Sour-SRK property packages. The impact is as follows:... |
Problem Statement: How can I quickly locate a particular unit operation / stream in a large simulation case? | Solution: If you are looking for an item on a large PFD, functionality has been added since v 2.2 of HYSYS which will help to draw your attention to this item. Under the PFD menu, choose Select Objects, and select the object which you would like to find. A white box should blink around the object in question. You can t... |
Problem Statement: How does HYSYS handle the sizing of split feeds in columns? | Solution: If you have a feed and you mark on the column that it is split, HYSYS will send the vapour to the tray above the feed tray. This will give you the correct flow profile in the column itself but the column will not be sized properly in the utility.
With a feed split, the column is solved with the liquid going t... |
Problem Statement: I accidentally selected the Dynamics (Fidelity) mode option within Aspen HYSYS. How can I remove the Fidelity License option that I have selected? | Solution: Open the case file in the Simulation Environment.
Click on Simulation on the menu bar and go to Integrator | Option. Now click on the Remove Fidelity button to remove the fidelity option.
Keywords: fidelity; dynamics; license; integrator; fidelity option
References: None |
Problem Statement: How are the heights and locations of vessel weirs and nozzles defined? | Solution: While modeling vessels in dynamics, it is important to know how the heights and locations are defined for their weirs, as well as nozzles. The document attached herewith provides a graphic description of such definitions.
Keywords: Weir, nozzle, vessel, dynamics
References: None |
Problem Statement: How do I send my Aspen HYSYS report to a colleague via e-mail? | Solution: Data from an existing report, as well as from any workbook, stream or unit operation can be saved in a comma delimited text file which can then be opened and formatted in Excel.
To save information using this format, open the desired object (i.e. workbook, stream or unit operation) and select File | Print fro... |
Problem Statement: I have just installed a subflowsheet but when I connected some streams in the PFD, the icon turned red. What should I check? | Solution: The most likely cause of this is that a Transfer Basis has not been selected for your material stream.
It is possible to use different property packages can be used inside a subflowsheet and its parent flowsheet. When performing a flash calculation on a fluid using two different equations of state, for exampl... |
Problem Statement: How to fix the corrupted components list error message?
Applicable Version(s)
HYSYS V 2004.2 | Solution: ThisSolution is for the people who have not installed the Cumulative Patch 4 (CP4) for the HYSYS 2004.2 version. In most of the cases, installing this patch will take care of the problem with the corrupted components list message you are getting. All you need to do is to run the .exe file in the attached HYSY... |
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