question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Why doesn't the pump display horsepower on the Parameters page? | Solution: The view for the pump is set up to display the energy (heat flow) of the pump. The typical units for heat flow are kJ/h or Btu/hr.
There is a workaround that will enable you to display the Power on the Parameters page. To use the workaround:
Save the attached zip file to disk.
Extract the files to the USER su... |
Problem Statement: When I define a COMThermo property package such as DBR Amine, Margules or Braun K10 I get a warning message and I cannot go back to the Simulation Environment. | Solution: The warning message reads:
There was an error in setting up COMThermo. You may need to press the Extended PropPkg Setup or Finish Extended Flash to complete the set up.
The first thing you need to do is to click on the 'Extended PropPkg Setup' button:
Then click on 'Finish Setup' on the new window that open... |
Problem Statement: In the PID controller setup, specifically Parameters tab/Signal Processing page, you can activate filters.
What kind of filter is this?
Is the filter time the time constant? | Solution: It is a first-order, low pass filter.
Yes, the filter time is the time constant.
Keywords: PID, Controller, Filter, time constant
References: None |
Problem Statement: The values for my pour point, flash point, Cetane Index (Diesel Index), Refractive Index, Reid Vapour Pressure, P/N/A (PONA) and/or RON look wrong. How is HYSYS calculating these? | Solution: Information on this can be found in Utilities chapter in the HYSYS Operations Guide Manual (available on the HYSYS documentation CD or DVD shipped with the software). A table listing all the properties in the cold properties utility summarizes all the calculation methods and their range of validity. A quick s... |
Problem Statement: Can I access data about the components in my case using Automation? | Solution: Yes, the HYSYS Component object has all the information that you see in the Fluid Package view within HYSYS. This is accessible via the Components collection of the FluidPackage object. The syntax to get to this is as follows:
Dim hyCpts As HYSYS.Components
Set hyCpts = [Flowsheet Object].FluidPackage.Compone... |
Problem Statement: Is the value of light ends basis in Aspen HYSYS Crude Manager expressed as percent of light ends or percent of total crude assay? | Solution: The input of light ends should be expressed as the percentage of the whole crude, as seen on the screenshot the light ends for this case would be 1.409%, the remaining percentage would be the heavy components of the assay.
Keywords: light ends, assay, oil manager, basis, input
References: None |
Problem Statement: We have simulations that handle more than 256 streams. Is there a later version of the Stream Reporter (Version 1.6) that will allow more than 256 streams to be pulled from HYSYS into New version MS Excel? | Solution: If you have new version MS Excel, you may go the code to comment out the following code in procedure WriteTable in Modules modWriteTable.
'Check that we have enough room - Excel is limited to 256 columns
If NumStreams > 256 - OutputStart.Column + 1 Then
NumStreams = 256 - OutputStart.Column + 1
MsgBox... |
Problem Statement: In Aspen Hsysy V7.2 and V7.3 Installation guide, only Multiflash V3.8 is supported. But the latest version of Multiflash is currently V4.0. Is the latest version V4.0 is applicable to HYSYS V7.2 and V7.3? | Solution: The Hysys Multiflash interface automatically takes are of the Multiflash version, provided that Multiflash install creates the correct registry key. The key we are looking for are:
HKCU\Software\Infochem\Multiflash\COMTHERMO
Or
HKLM\Software\Infochem\Multiflash\COMTHERMO
Starting with version 4.0 th... |
Problem Statement: How can I achieve a ''PFD1 to PFD2 cross PFD feeder connector? If I want to use a product stream of an existing PFD as the feeder stream of a new PFD, and the two PFDs are linked through this ''across PFD stream''? | Solution: You can add a new PFD first.
Do not clone from the existing PFD.
Then delete any stream you want to link from the existing PFD, and re-add it again.
You will see the newly created PFD will contain this stream as well. And this stream is synchronized among all the PFDs.
Now you can start adding the downstream ... |
Problem Statement: How is Mass Flow converted into the Std. Gas Flow [STD_m3/h] variable reported in the ‘Properties’ page of any stream in Aspen HYSYS? | Solution: The Std. Gas Flow is calculated from the specified or calculated mass flow, according to the Ideal Gas law at standard conditions (1 atm, 15 deg. C):
IdealDens = p0 Mw / (R T0)
where,
p0 – pressure at standard conditions (Pa)
Mw – gas molecular weight (kg/kmol)
R – ideal gas constant (8.314 J/mol/K)
T0 ... |
Problem Statement: Pressure assignment in a mixer is either ‘Equalize all’ or ‘Set Outlet to Lowest Inlet’. Thus, the pressure of the mixed stream is either the lowest of all inlets, or all streams have the same pressure. The user may wish to mix a lower pressure stream to others at higher pressure, and have th... | Solution: Instead of using a Mixer, the user should use the Balance operation of ‘Component mole and heat flow’ and assign the desired pressure value to all streams connected.
Keywords: Balance, Mixer, Pressure
References: None |
Problem Statement: Why the component specification in the column changes after modification of the component list? | Solution: When a component specification is added in the column, the component is taken from the array index in the component list. The column specification then uses this index. If the component list is re-ordered or a component is deleted from the list or a new component added in the list then the component in the or... |
Problem Statement: How do I restrict what values the user can enter into a User Variable? | Solution: For example, how do I prevent negative lengths?
The VariableChanging procedure allows the programmer to check what value the user is entering and if necessary to reject it using the AllowThisChange property.
The following example illustrates the use of this procedure.
Sub VariableChanging()
If ActiveVariableW... |
Problem Statement: Why is the lower heating value showing empty for some of my streams? | Solution: The reason why HYSYS is unable to calculate the Lower Heating Value (LHV) for some streams is that some of the components in these streams do not have a specified Heat of Combustion value (You can check it in the Basis Environment, Component Property View, Point tab). To work around this limitation and obtain... |
Problem Statement: How do I change the order of the tabs in my workbook? | Solution: Point the mouse pointer to the tab that you want to move. Click the left mouse button and hold it down. Drag the mouse pointer down to the bottom of the tab and as soon as you go just below the tab, the mouse cursor will change into an arrow pointing upwards. Move the mouse pointer left or right until the arr... |
Problem Statement: I need to create a standard Distillation Column. Do I need to worry about SubFlowsheets? | Solution: No. You can use the built in Distillation Template and add the Column to your case. From the Main Build Environment it is possible to completely specify and converge the Column. The Column will still reside in the SubFlowsheet, but all basic information can be gathered from the Main Flowsheet.
Example: Adding... |
Problem Statement: Can HYSYS calculate steady state vapour liquid separation based on separator dimensions? | Solution: The default HYSYS separator calculates steady state separation based on thermodynamic equilibria, based on the stream conditions and composition.
Note that this applies to versions of HYSYS up to version 3.0.1; starting with version 3.1 the Real Separator allows the user to include carryover and the effects o... |
Problem Statement: How do I detemine which units HYSYS is currently using to display values? | Solution: In versions prior to HYSYS 2.2, this was not possible.
Now you can use the CurrentDisplayUnit property of the UnitConversionSet class to recall the current unit used in HYSYS.
Keywords: Units, CurrentDisplayUnit,UnitConversionSet
References: None |
Problem Statement: How can I split a feed stream into pure component streams? | Solution: The component splitter in HYSYS allows you to split a feed stream into pure component streams.
In versions up to HYSYS 2.4.x, the component splitter allows you to split a feed stream into two product streams, and to assign a fraction of each component to be directed to each of the two streams. For creating mu... |
Problem Statement: How does the Write P-F Equations check box affect my Olga solver in OLGALink in Aspen HYSYS? | Solution: On the Dynamics|OLGA control tab, the Write P-F Equations box if unchecked, this tells Aspen HYSYS not to include the OLGA link operation when it performs its pressure-flow solve. When this box is unchecked, then dynamic specifications need to be added to the streams attached to the OLGA link. So on the outle... |
Problem Statement: What do the coefficients C1 to C5 in the Fire Mode Heat Flux equation represent? | Solution: The Fire Mode heat flux equation is shown below:
Q = C1 + C2*Time + C3*(C4 - Vessel Temperature) + C5 * (Liq. Vol. at time t = t / Liq. Vol. at time t = 0)
where
C1 - Constant Heat Flow to Vessel (kJ/h)
C2 - Constant Rate of Heat Flow Change (kJ/h/h)
C3 - Heat Transfer Coefficient between Vessel and Surroundi... |
Problem Statement: How do I add a property package to HYSYS or change the existing property package using OLE? | Solution: HYSYS property packages must be referred to by their internal name when using Automation. Set the .PropertyPackageName property of the Fluidpackage to the appropriate internal name. For example use PengRob for Peng Robinson.
A list of these names is below:
HYSYS Name , Name to supply in PropertyPackageName
Am... |
Problem Statement: HYSYS v2.4.1 Amines Package: I am getting a warning saying Property Package Ranges exceed. Are my results valid? | Solution: The Amines package contains the thermodynamic models developed by D.B. Robinson for their proprietary amine plant simulator, called AMSIM (version 7.0 of AMSIM is used in HYSYS v2.4.1). The AMSIM package recommends temperatures between 25C and 125C be used. This is because the simulation results have been tes... |
Problem Statement: Is pressure recovery factor (FI) the same as the valve recovery coefficient (Km)? | Solution: Two factors are similar. One FI is for ANSI/ISA sizing method. KM is for Fisher method.
The liquid pressure recovery factor (Fl) corresponds to Km in the Fisher-based sizing method. It indicates the amount of pressure recovery between the valve?s vena-contracta and the outlet stream. Generally, the higher the... |
Problem Statement: When the SULSIM extension is loaded in order to run a SULSIM Mode, users might get the message. SULSIM 6.0 must be installed and registered. | Solution: HYSYS only works with SULSIM version 6.x. SULSIM 7 does not work within the HYSYS unit operation extension environment.
If you wish to run the HYSYS-SULSIM link you need the Linked version of SULSIM 6. There is also a Standard version of SULSIM 6 which does not support operation with HYSYS. Most users do not ... |
Problem Statement: How do I check my model for K - Values for each component in my column unit operation? | Solution: To see the K-values for all components, go to Performance | Plots page, select the K values and then click View Table or View Graph. Once the table/graph is displayed, click the Properties button to configure which component values are plotted.
The component name tags can be changed manually by right clicking... |
Problem Statement: If I create a Workbook tab for my PID Controllers, two of the possible variables are Sampling Rate and Sample PV Every x Time Units, what is the difference? | Solution: These correspond to two completely different aspects of the controller's operation:
Sample PV Every x Time Units
This is the number entered into the controller property window Parameters tab... PV Conditioning page, Sample PV Every (option of input)
When a time period is entered here (say x seconds). Then Hys... |
Problem Statement: How does the HYSYS network version know whether or not it has found the right key? | Solution: Each network (grey/beige) key will have a key number but there is also a code associated with the key. For example key 8995 might have the code OPT65 associated with it. You can't see the code anywhere, only the key number. The install code on your HYSYS CD (the very long number on the sticker of your CD case... |
Problem Statement: Why does a pump start cavitating when another unit operation is connected upstream? | Solution: Pump cavitates when the NPSH available which is calculated by Aspen Hysys is less than the user specified NPSH required. See KB 126063 .
From V7.2 and above, the NPSH calculation has been modified to include the elevation difference between the nozzle attached to the pump and upstream unit operation. See KB ... |
Problem Statement: How is a minimum UA scale factor used in the heat exchanger in a dynamic simulation? | Solution: ThisSolution is applicable for a heat exchanger using Basic Model running in dynamic mode.
The UA is specified for a basic model. The dependency of UA on flow can be applied using reference flow rates for the shell and tube sides as follows:
UAused = UAspecified x F
Where F is the scale factor. This is ... |
Problem Statement: How can I simulate a heat exchanger in HYSYS using EDR? | Solution: If you have a heat exchanger model in EDR and want to use it on a HYSYS simulation you need to enable the option for EDR-Shell&Tube under Design | Parameters. After that, the EDR tab should be activated.
If the drop down menu does not show this option, then it means that the software is not installed on the c... |
Problem Statement: How do I create a strip chart? | Solution: Strip charts are typically used when dynamic mode operation is in use in HYSYS. The strip chart can be used to track historical data from a simulation, observe trends in the system behaviour as well as diagnose any potential problem areas. Strip charts can track many variables at once and not all variables ne... |
Problem Statement: How do I calculate Lower and Higher Gas Heating Values for a stream with hypothetical components? | Solution: For lower heating value (LHV):
1. Go to Tools / Correlation Manager / Configuration / Gas / LHV (...) Basis
2. Click Activate Selected Global Correlation
3. Go to Stream / Worksheet / Properties - it will appear as LHV (...) Basis [Gas]
For higher heating value (HHV):
1. Go to Tools / Correlation Manager / Co... |
Problem Statement: What is it new in Report Manager in V7.3? | Solution: Report Manager has as a new option the possibility of browsing a template which must be a .wrk file. There are three templates available: Hysys, Heat Profiles and Petroleum Refining.
There is also the possibility of browsing a customize workbook (Create your own template). These are the steps to follow:
- ... |
Problem Statement: What is a Compressor Surge Controller? | Solution: A compressor will surge if its capacity falls below the surge limit. The surge controller determines a minimum volumetric flowrate that the compressor should operate at without surging. This is called the surge flow. The surge controller then attempts to control the flow to the compressor at some percent abov... |
Problem Statement: How do I change the default file location that appears when you save it? | Solution: Default location can be changed from Tools | Preferences | Files tab.
Under the Cases you can type a path for the network location.
Keywords: save file, default location
References: None |
Problem Statement: How do I model a counter current LNG exchanger? | Solution: At least two zones should be used in any dynamic LNG exchanger, this generally allows for more accurate calculations.
The use of more than 1 zone, often causes some confusion in the LNG setup since Hysys allows you to specify the inlet and outlet streams from each layer of every zone, which might result in a ... |
Problem Statement: How can I quickly generate a report for a single stream/operation? | Solution: Right click on the icon, or in the title bar of the stream/operation properties window, and choose Print Datasheet.
Keywords: Datasheet
References: None |
Problem Statement: I want to set Tube Wall Cp and Density, but HYSYS won't take the values. Why? | Solution: You can only enter these values when the exchanger method is set to Dynamic Rating ... Detailed. (i.e. Dynamic Rating on Design .. Parameters page, and Detailed on Rating ... Parameters page)
Keywords: Dynamic Rating, Wall Cp, Wall Density
References: None |
Problem Statement: Cannot select new surface tension method for Chien Null property package | Solution: The new option for prediction of surface tension based on the API procedure 10A3.2 is available only for the following packages Chao Seader, Glycol Package, Grayson Streed, Peng-Robinson, PR-Twu, PRSV, Sour PR, Sour SRK, SRK, SRK-Twu, and Twu-Sim-Tassone.
Keywords: new, method, surface tension
References: Non... |
Problem Statement: Are the shell and tube Heat Transfer Coefficients calculated on a clean basis? | Solution: The shell and tube heat transfer coefficients do take the fouling factor into account. When this value is zero the shell and tube heat transfer coefficients are calculated on a clean basis.
You can input the shell and tube fouling factors on the Rating tab/Sizing page by selecting the appropriate radio button... |
Problem Statement: What are the hot-keys for Aspen HYSYS PFD? | Solution: Function
Hot-Key
Zoom out
Page Down or Ctrl Down Arrow
Zoom in
Page Up or Ctrl Up Arrow
Zoom All
Home/Ctrl Home or End/Ctrl End
Toggle between last zoom levels
Z
Pan
Arrow or Shift Arrow keys
Centre PFD on cursor
Period key or C
Mirror about X axis
X
Mirror about Y axis
Y
Rotate 90
1
Rotate 180
2
Rotate 270
3... |
Problem Statement: Before attempting to run any of the automation examples, ensure that you have the Visual Basic 5.0 MSVBVM50.dll and 6.0 MSVBVM60.dll run-time files installed in your Windows System32 directory. | Solution: Attached are the .dll files listed above.
Keywords: run-time, .dll, automation
References: None |
Problem Statement: How do I open UNISIM files with Aspen HYSYS? | Solution: UNISIM files can be opened in Aspen HYSYS. You need to save them as .XML format in UNISIM and then open it in Aspen HYSYS by choosing File > Open > Case and then select the .XML file as you can see below:
A
Now the XML file should load fine in HYSYS and you should be able to save back to *.hsc file.
For more ... |
Problem Statement: What is Improved in Aspen HYSYS ? Combined Liquid Viscosity in Pipelines | Solution: Most pipe flow correlations have been developed for two phase flow of gas and liquid. Therefore, if a third phase, like water, is present in the pipeline, then the two liquid phases are combined into a representative liquid phase. This combination requires the calculation of mixture properties like viscosity.... |
Problem Statement: I have supplied the correct number of specs for my distillation column, but the degrees of freedom is still showing as ?1' Why could this be happening? | Solution: If the Feed to the Column has not flashed, then this will be interpreted by the Column as a degree of freedom. The column will not begin to solve if all feed streams entering the column are not flashed.
Keywords:
References: None |
Problem Statement: Why is XML important? What new features does XML functionality bring to HYSYS? | Solution: Several new capabilities are made possible through the use of XML technologies. For instance, a HYSYS case can now be stored as an XML file giving an alternative to the traditional binary .hsc file. XML is the means of data transfer used by the new Case Linking and Collaboration capabilities. Finally, the Cus... |
Problem Statement: How to include the specific gravity rel. to air or any desired properties in workbook report print out | Solution: You can customize the workbook first, then in the report, add workbook as your datasheet object. See below screenshot on how to customize your workbook.
Then add workbook as your report datasheet object.
Keywords: Report customization, properties, workbook
References: None |
Problem Statement: How can I create an Excel report for my Hydrate Formation Utilities? | Solution: Download the attached workbook page and you can place it in ?C:\Program Files (x86)\AspenTech\Aspen HYSYS V7.3\Workbooks\? directory.
Click in the workbook icon in Hysys and go to Workbook -> Import -> Pages..
Select the Hydrate Formation Utility to append a new page in your workbook.
Go back to the Workbook ... |
Problem Statement: When installing HYSYS V7.3_Patch 3 on Windows 7, users may see the following message:
a??Internet Explorer restricted this webpage from running scripts or ActiveX controlsa??
The installation will not continue until users configure ActiveX Controls permissions in Internet Explorer. | Solution: This knowledge base article describes how to resolve the Internet Explorer restriction on ActiveX controls. After double clicking on the Aspen HYSYS patch executable, a small window will appear (see picture above). The window is basically not allowing the ActiveX Controls to install and thus prevents the patc... |
Problem Statement: What is the difference between the SLE and SLEV73 correlation in the tray sizing utility? | Solution: A? The SLE (Sherwood-Leva-Eckert) correlation is valid for towers operating above the loading factors of 20000 (liquid loading > 9200 lb/hr.ft2).
A? The SLEv73 (Sherwood-Leva-Eckert for HYSYS v7.3) is a superior representation of the graphical SLE curves when compared to the original HYSYS SLE... |
Problem Statement: What is New in Aspen HYSYS V7.3 ? Integration of OLI?s Mixed Solvent Electrolytes (MSE) Capabilities in Aspen HYSYS | Solution: Aspen HYSYS V7.3 CP1 introduces the availability of the OLI Mixed Solvent Electrolytes (MSE) capabilities within Aspen HYSYS via a link. Prior to this release, Aspen HYSYS only supported a link to the OLI aqueous models.
In both cases, the OLI software must be licensed directly from OLI Systems or one of thei... |
Problem Statement: When user click on 'Quick Size' option in Aspen HYSYS (2-phase or 3-phase separator) running in Windows Vista or Window 7 environment, it may show an error message Could not size separator: Interface Request Failed. | Solution: To fix this problem, a file called sepsize.dll in the Aspen HYSYS installation folder should be registered as follows:
1. From the Windows Start menu, choose Command Prompt (type 'cmd' >> press enter) to get a DOS prompt. From here user can register this dll file. Make sure user has full administrative rights... |
Problem Statement: | Solution:
Keywords:
References: None |
Problem Statement: How can I use a User-Defined Valve type in Dynamics? | Solution: For Aspen HYSYS versions 2.4.1 to 3.2, please read the attached document.
For versions 3.4 to current, Aspen HYSYS allows the user to input values in the curve information table, as shown in Figure1:
Figure 1. Curve Information Table
Keywords: Valve Type, Valve Operating Characteristics, User Valve Type
Refer... |
Problem Statement: As optional information, the top and bottom temperature estimates can be provided in the column operation. Those values are used to initialize the temperature profile of the column and some convergence problems can be avoided if good estimates are provided. | Solution: Bottom temperature: in the main flowsheet add a new stream (Bttm-estimate for instance). Specify the pressure as the reboiler pressure and specify the composition as the expected composition of the bottom product. Specify the vapor fraction as zero and Hysys will calculate the bubble temperature of that strea... |
Problem Statement: Can I automatically attach a process stream to a unit-operation on PFD? | Solution: 1. A Select the process stream
2. A Make sure Auto Attach Mode button is pressed on the PFD Toolbar
3. A On the object palette, select the unit operation say Pump
4. A Click on the PFD. The Pump will automatically attach to the process stream selected.
Keywords: Auto Attach Mode, Attach stream ... |
Problem Statement: Should I follow the Dynamic Assistant recommendations all the time? | Solution: The dynamic assistant is designed to follow a specific set of rules for Dynamic Specs. These rules might not suit your case at some point, so if you press No when you are prompted to see the dynamic assistant comments, HYSYS will attempt to start the integrator. If the model is specified properly the case wil... |
Problem Statement: How does Aspen HYSYS calculate the size and/or flow for a 2 phase relief valve? | Solution: The relief valve in Aspen HYSYS calculates for two phase flow as follows:
Where:
Vf = Vapour Fraction
VapFlow = flow calculated using the vapour flow formula (choked or non-choked)
LiqFlow = flow calculated using the liquid flow formula
The vapour and liquid flows are calculated according to equations 5.51, 5... |
Problem Statement: What are the Surge Parameters of the Compressor Surge Controller? | Solution: There are a few parameters for the Surge Controller. These have also changed between Hysys 3.2, and Hysys 3.4 and later versions.
Hysys 3.2 and earlier.
1- A and B parameters. These are used to represent the Surge Curve of the compressor using the following Equation:
Q = Surge Flow (m3/sec)
H = Head (m)
H = A... |
Problem Statement: What is a ratio controller? | Solution: The Ratio Controller is a special type of Feed Forward controller that maintains the ratio between two process variables. The Ratio Controller takes two inputs with the desired ratio as the SP and calculates an OP. Prior to HYSYS 3.0, this was done using a Spreadsheet Operation. A ratio controller operation w... |
Problem Statement: I'm using the new HTFS-Engines option, within HYSYS. What type of calculation mode is the new TASC interface using? Is it Checking, Simulation or Design? | Solution: The new HTFS-Engines option, within HYSYS, was implemented using Simulation. Using the given stream inlet conditions, the Simulation calculation mode is used to determine the heat load, pressure change and stream outlet conditions that will occur with the exchanger you specify.
If you need the Design or Check... |
Problem Statement: When opening Aspen Properties Database Manager, the error message Snap-in Failed to initialize or
Snap-in Creation failed occurs (See attached error message for detail). | Solution: 1. Go to Control Panel | Add/Remove Programs
2. Un-install the Microsoft SQL Server 2005 including the other SQL Components, and then reboot the system.
3. Install the attached SQLEXPRS32.exe from thisSolution.
4. Select the default option, select Mixed Mode Authentication and enter Aspen100 or any password. ... |
Problem Statement: Are there any Rate-Based Distillation examples available for CO2 capture and H2S removal from acid gas streams? | Solution: Several new sample cases illustrating the use of Rate-Based Distillation to model the removal of CO2 and/or H2S from acid gas streams using amines (MEA, MDEA, DEA, MEA+MDEA, DEA+MDEA) have been provided in Aspen HYSYS sample folder:
C:\Program Files \ AspenTech \ Aspen HYSYS (version V7.3 and higher) \ Samp... |
Problem Statement: What is the Compressor Stone Wall curve used for? | Solution: The compressor Stone Wall curve will limit the actual flow through the compressor to a certain upper limit that cannot be exceeded.
Keywords: Compressor, Stone Wall
References: None |
Problem Statement: Can I use Automation to access user property values? | Solution: The .GetCorrelationValue method of the ProcessStream object can be used to access a user property attached to a stream. Simply pass the user property name and the type Standard.
[The GetCorrelationValue method is also used to access the value of property correlations linked to the stream (seeSolution 110955)]... |
Problem Statement: Why do Aspen HYSYS simulation files have a lock icon? This issue can occur if there is a permissions or access issue on the folder the files reside in. | Solution: There are two ways of removing the lock icon.
Method 1:
· Right click on the folder and click on “Properties�.
· Go to the tab “Sharing�.
· Click on “Share�.
· Select the user group from the dropdown e.g. everyone if you want to share it with everyone and then c... |
Problem Statement: 为?Y么?a?Ireal separator (?^实`S??离Si)?I??离?A?E?a?a预计?I?v???k`??C`|?Ocarry-over(?g带?A应)?I`S应ZQ???a?C??ZQ????经设?e?D??Z?SZ??离Si??经??敛???H | Solution: ?p户应该检查?e????离Si?o?uSC?I`S应?E?u?B
?@?E???m???a?I?e???o?uSC?I?E?u?CZg???eSi?a两`S?ISE?E刚?D?Y这???o?uSCa?围?a?C???s论这???o?uSC?????Y为??让??离?@?I???e`S?E过?I?C?Y???o?uSC??总?i?L两`S?????E过?B换??话说?C?s`u?e`S?i?????o?uSC?E过?C?A?s?Y?o为carry-over(?g带)?A应?CZ?仅仅?Y?o为?o?uSC???x?a?#?a`S间??离SE?E???x?I?I???B
?p户应该尝试调???o?uSC?I??... |
Problem Statement: When you pass the pointer over any stream or unit operation, a banner like the ones on the images below is shown:
How can someone customize the properties displayed? | Solution: You need to go to Tools | Preferences and under the Simualtion Tab go to the Toot Tips option on the left hand side.
Now select from the Show PFD fly by section: 'Material Stream', 'Energy Stream' or browse through a unit operation. Then on the right hand side a list of properties should show up.
Check the bo... |
Problem Statement: Where I can find the Autorecovery files in Windows 7? | Solution: You will find the files in this path:
C:\Users\UserName\AppData\Local\Temp\
And the files will have this name:
Autorecovery save of FILENAME (0X861152).ahc
Keywords: Autorecovery, windows 7.
References: None |
Problem Statement: How do I know I'm choosing the correct Amine in my Electrolytes property package? | Solution: The component names are different in the OLI Electrolytes package.
MDEA is MDEXH in Electrolytes, MEA is MEXH, DEA is DEXH.
Keywords: amines, MEA, MDEA, DEA, OLI electrolytes
References: None |
Problem Statement: What does the Current Time represent (on the integrator window general tab) ? | Solution: The current time cell indicates how much time has past (in simulation time) since the integrator started the first time. This value can be set to zero at any time by the user.
Keywords:
References: None |
Problem Statement: Why is the Pipesys value for viscosity for my Oil-Water mixture different than the HYSYS value? | Solution: There are different equations involved in the viscosity calculation in Pipesys and in HYSYS.
In Pipesys, the viscosity of a mixture of hydrocarbon liquid and water phase is calculated as:
Mu(m) = Mu(oil)^V(oil) * Mu(water)^[1-V(oil)]
where Mu(m) = viscosity of blended mixture
Mu(oil) = viscosity of oil phase
... |
Problem Statement: Can PIPESYS read PIPEFLO files? | Solution: Unfortunately, it is not possible to read PIPEFLO files into PIPESYS.
Keywords:
References: None |
Problem Statement: Why does report manager give two different liquid volumes for the depressuring utility? | Solution: In Aspen HYSYS V7.2 and all lower versions the Report Manager gives liquid volume in the Design | Connection section. This is the default value used by HYSYS when the simulation is run in dynamic mode.
The initial liquid volume is the value specified by the in the Depressuring Utility. The depressuring utilit... |
Problem Statement: If I change my strip chart variables, why do I have to re-run the scenario? | Solution: The depressuring utility only stores data when it is asked to do so. Otherwise, case size would grow very large. Therefore, if changes are made to the variables stored, the scenario must be re-run.
Keywords: depressuring; dynamic depressuring; strip chart
References: None |
Problem Statement: How can I get rid of unwanted lines that appear in the PFD? | Solution: On occasion, unwanted lines appear on the PFD while making modifications to the PFD display (such as showing a summary table for a stream or unit operation), as in the figure below. In order to get rid of these lines, click on the Drag Mode icon in the PFD tool bar, then move the PFD a small amount in any dir... |
Problem Statement: Where can I find the Bulk Velocity, and Erosional Velocity in the ASW Variable Browser | Solution: You should be able to find it in Active Forms base object in pipe unitop
Keywords: Erosional velocity, bulk velocity, Aspen Simulation Workbook, Variable Brower
References: None |
Problem Statement: How do I use the interpolation method for Aspen HYSYS Compressor/Expander Curves? | Solution: In the HYSYS compressor operation, a cubic spline method is used for the interpolation of the speed curves themselves and for the interpolation between speed curves. Here is an outline of the procedure:
When multiple curves of different speed are provided (for example three curves for 9000 rpm, 11000 rpm and ... |
Problem Statement: How can I display Compressor / Expander power and heat flow separately on a specsheet? | Solution: In HYSYS whatever units are set for the display of 'Energy' will be used to display both the heater/cooler and compressor/expander duty.
If you want to display compressor / expander duties in power units then you can add the following user variable to a compressor / expander. The units of the User Variable mu... |
Problem Statement: How do I create a vapour pressure curve? | Solution: You will need to use the Property Table utility.
1. Select the stream that contains the composition you wish to find the vapour pressure curve for.
2. For the 1st Independent variable, select Vapour Fraction | Mode = State and set the value for the State to be 0.0 (i.e. the vapour pressure is equivalent to th... |
Problem Statement: What are the Shell Baffle Types Hysys uses for Rating of Heat Exchangers | Solution: Shell Baffle type can be set on the Rating tab ... Sizing page ... Shell radio button of the Heat Exchanger property window.
Single, Double and Triple
These are the standard segmented baffle types as illustrated in the TEMA standards (8th Ed, p 31) or Perry (7th Ed, p 11-42)
Grid
These could equally be called... |
Problem Statement: Can I size a three-phase separator in HYSYS? | Solution: The Vessel Sizing utility does not currently support three-phase separator sizing. While in HYSYS Version 2.4.1 and up you can select a three-phase separator as the object for the Vessel Sizing utility, the calculations will be based only on the Vapour and Light Liquid flows, and will not take the Heavy Liqui... |
Problem Statement: What is the difference between the GCEOS PR package and the standard PR package? | Solution: GCEOS model is used to define and implement your own generalized cubic equation of state including mixing rules and volume translation. When you select PR option from within the GCEOS it reduces to the PR EOS. This is the Standard PR, not HYSYS PR. The main difference between standard PR and HYSYS PR is the a... |
Problem Statement: How can I simulate a heterogeneous catalytic reaction in a PFR? | Solution: A heterogeneous catalytic reaction can be simulated in a PFR. The following document oulines some of the steps as well as some of the terms used in this operation.
Keywords: PFR, Catalytic, Void Fraction
References: None |
Problem Statement: What is Weep Velocity? | Solution: On a tray if the gas rate is too low, much of the liquid may rain down through the openings of the tray (weeping), thus failing to obtain the benefit of complete flow over the tray. The gas velocity at which the weeping starts to occur is defined as weep velocity.
Keywords:
References: None |
Problem Statement: How to model a Decanter in Aspen HYSYS? | Solution: Decanters are used to separate liquids where there is a sufficient difference in density between the liquids for the droplets to settle readily. Decanters are essentially tanks which give sufficient residence time for the droplets of the dispersed phase to rise (or settle) to the interface between the phases ... |
Problem Statement: Can I access the Envelope Utility via Automation? | Solution: Yes, although this cannot be achieved with any of the standard Automation methods. Since the Envelope utility is not yet fully wrapped for Automation access - you will note there is no envelope object in the HYSYS type library.
Instead a 'Backdoor method' must be used.
NB Backdoor methods are only recommended... |
Problem Statement: Sometimes it is needed to operate a column at isothermal conditions. How do I represent them in Hysys? | Solution: In real plants, such columns do have intermediate heat exchangers in almost every tray. A preliminary designSolution can be obtained in Hysys using duty streams and Temperature Tray specifications all along the column. The limit situation would be to install a duty stream in every stage, although some interme... |
Problem Statement: How do I add a graphic file (.bmp) to the PFD? | Solution: Right click on the PFD and Select Insert Object.
Choose the Create From File Page and browse for the file you wish to insert.
The attached .jpg demonstrates how to accomplish this.
Keywords:
References: None |
Problem Statement: Why is my Extension Unit Operation's PFD Icon Yellow? | Solution: HYSYS will outline a unit operation in yellow if it cannot complete its calculations. Usually, the unit operation will use its StatusQuery method to provide the user with a specific reason why the solve can not be completed, but the Not Solved warning will be provided by default.
To prevent this warning from ... |
Problem Statement: How do I install OLGAS for my pipe segment? | Solution: You do not have to install OLGAS separately. When you install HYSYS, the OLGAS extension would have been installed automatically for you; however, you do need to purchase the OLGAS license in order to utilize this extension.
To purchase the OLGAS license, please contact your Hyprotech Sales Representative.
Ke... |
Problem Statement: For Column flow rate specs what stream properties do the Volume and Std Volume Flow Basis correspond to? | Solution: The flow basis values in column specs correspond to the following stream properties.
Specification Flow Basis : Stream Property
Volume : Std Ideal Liq Vol Flow (Labelled Liquid Volume Flow prior to HYSYS 3.0.1)
Std Volume : Liq Vol Flow @ Std Cond (Labelled Std Liq Vol Flow prior to HYSYS 3.0.1)
See Section 1... |
Problem Statement: What is the stream cutter and how is it used? | Solution: A stream cutter serves to facilitate the transition between one property package and another.
In HYSYS 3.0 you no longer need to use Sub-Flowsheets when creating model with multiple Fluid Packages. Each Unit Operation and Stream can have its own associated Fluid Package. A Stream Cutter Operation is automatic... |
Problem Statement: Does the component `?Therminol 62?? is available in Hysys? | Solution: Unfortunately, the only available components like that are the following and this is using Aspen Properties Component List inside Hysys:
If you decide to use one of the list above you need to go to the Simulation Basis Manager and add a component list but using Aspen Properties
And then a window like the fo... |
Problem Statement: What is the Pressure/Flow Solver? | Solution: The pressure flow solver is the main engine behind the Dynamic calculations in Aspen Hysys Dynamics. It relates the flow through the plant to the pressure drop. This allows for much more realistic behaviour of the model.
Each operation includes either a flow resistance relation (e.g. a valve flow is related t... |
Problem Statement: Warnings or error messages pop up while my case is solving and the solver stops until I press OK. How do I prevent these messages from disrupting my case? | Solution: You can display any warnings and/or errors in the Trace Window to prevent the need for user intervention and to allow your case to solve without interruption. To send the errors or warnings to the Trace Window:
Version 3.1 or earlier:
Go to Tools\Preferences and on the Simulation\Options page, check the boxes... |
Problem Statement: When I want to import an assay from Crude Manager into Aspen HYSYS, I get the following message: The spiral module is not found. | Solution: This error occurs when the Crude Manager from SpiralSoft license cannot be found. You will need to contact SpiralSoft for an additional license for this function. http://www.spiralsoft.co.uk
Keywords: Spiral
Crude Manager
HYSYS
Assay
References: None |
Problem Statement: Can I use valve Cv and Percentage Open to calculate the pressure drop in Aspen HYSYS steady state? | Solution: In Aspen HYSYS V7.2 and earlier, only HYSYS Dynamics can calculate pressure drop based on Cv and Percentage Opening. In HYSYS Steady State, you will have to set up pressure drop across the valve or use the User Variable to calculate based on Cv.
Starting with Aspen Hysys V7.3, In Steady State you will have an... |
Problem Statement: How do I get vapour fraction and enthalpy data along the heating and cooling curve in my heat exchanger? | Solution: If you are using the default End Point solver (Design Parameters page in Heat Exchanger view) then the LMTD is calculated based upon only the end point temperatures of the heating and cooling curves (four temperatures). When you look at the data on the Performance Plots page only these 4 points are shown and ... |
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