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Problem Statement: In Case Study with the option to ‘Save Results to File’, the user does not have the option to browse and select a different location to save a file. By default, Case Study Results are saved as Temp files in the directory c:\tmp\results.csv. | Solution: The user can change the location of where the results are saved via the following steps:
1. First of all the file folder must be created prior to running the case study.
2. Then copy and paste the folder path to Case Study / results / Text file name. The Save Results to File checkbox has to be acti... |
Problem Statement: Does the Aspen HYSYS column handle apparent or true components when Electrolyte NRTL package is selected? | Solution: When Electrolyte NRTL package is selected, a reaction set can be generated using Electrolyte Wizard. However, this reaction set is NOT applied inside the HYSYS column. HYSYS column uses apparent components to perform the separation calculation. In all the connecting streams of the column, HYSYS will flash the... |
Problem Statement: The inventory projection window can be seen in the Planning Board. By default, it shows the inventory projection of the main product that gets produced. This | Solution: explains some of the other projections that can be seen in this window.
Solution
In the Planning Board, there is a contextual ribbon at the top. In the Schedule tab of this ribbon, look at the Inventory Projection panel. Click on the Settings menu in this ribbon.
This menu provides the options to look at th... |
Problem Statement: It might be the preference of some users to have different background colors for the Planning Board Gantt Chart, Inventory Projection Plot, the Tiles and the Screen. This | Solution: explains the options to do the same in V8.
Solution
a. To change the background color of the Gantt chart:
Type SSYC in the command window: If you don't find the GANTT entry in the code column of this set, add it in the code column and give it a suitable description.
Type SCOLOR in the command window: Choo... |
Problem Statement: In the Plant Scheduler Planning Board, there are a set of predefined time slots that the user can use to zoom to specific periods of the horizon.
These time slots are configurable. This | Solution: explains how to configure these time slots.
Solution
The following steps will accomplish this:
1. Go to the Developer tab | Commands Panel | Command line | Type: PBTSLOTS. This would open the control table for this UI property.
2. This table specifies which day of the horizon each of these options... |
Problem Statement: When using a Petroleum Assay, why are the cut point specs defined in a distillation column and the cut point results shown under Petroleum Assay Analysis different?
For instance, in the column, D86 95% is specified but the value reported in the Petroleum Assay Analysis for the Naphtha stream does not... | Solution: The spec “Column Cut Point is from HYSYS standard (based on Mid Boiling Point) and the Petroleum Assay Stream Analysis is based on Refsys (based on Final Boiling Point).
Please reviewSolution 126930 for more information.
To match Petroleum Assay Stream Analysis results, add specs as “End Point Based Column Cu... |
Problem Statement: By default, in the standard Plant Scheduler CAP(demo) model, when changing the amount of an activity through the activity editor, if the new quantity of the activity is not adhering to the lot size policies, then the amount gets adjusted automatically.
There might be situations where this is undesi... | Solution: explains how to disable this lot size policy enforcement.
Solution
The following steps will accomplish this:
1. Go to the Developer tab | Commands Panel | Command line | Type: CNTLS.
2. There is a row in this table: (SPLAN) Activity Editor Control Set/Table. The corresponding cell in this table is... |
Problem Statement: In the Plant Scheduler application, there is a widget to display the Inventory Exceptions. By default, it shows all the products which has inventory exceptions. If you would like to display Exceptions only on specific products, this | Solution: explains how this can be achieved.
Solution
The following steps will accomplish this:
1. Go to the Developer tab | Commands Panel | Command line | Type: FILL PBRBWK(SELMAT_HEATMAP,1) = MANUAL. Close the table that opens up.
2. Go to the Developer tab | Commands Panel | Command line | Type: FORM _G... |
Problem Statement: This article is intended for readers who implement Aspen Plant Scheduler.
Starting V8, Plant Scheduler’s Planning Board has new features called Inventory Tiles to view the Inventory of various products simultaneously. These Inventory Tiles can be viewed either in a Panel or a Screen.
There might ... | Solution: mentions the commands for performing this reset.
Solution
The reset button for the Inventory Tiles Panel or Screen is at the top right hand corner. It is used to re-build the products listed in the Inventory Tiles.
The same action can be programmatically executed through:
MAIN TILES RESET à For resetting ... |
Problem Statement: When hovering over an activity in the Planning Board, useful activity details can be found. These are called the Activity Tips.
There might be situations when you need to configure the Activity Tips to show additional details to the end user. This | Solution: explains how to configure this.
The prerequisite for reading this document is a basic understanding of configuration in Aspen SCM.
Solution
In the CNTLS table there is a row called “(ATIPSCTL) Activity Tips Control Set/Table” which points to the control table for the Activity Tips. By default, it is ATIPS. Th... |
Problem Statement: There may be situations where the users would like to change the color of the activity border for the activities on Planning Board. | Solution: You can now specify the color of the activity border by following the steps below:
1. SSYSC is the Rowset of the SYSCOL table.
2. Add a new entry ABORDER to the Rowset SSYSC of the SYSCOL table.
3. Now specify the color number for the ABORDER entry in the SYSCOL table.
The color numbers can ... |
Problem Statement: When working on the Planning Board you might prefer to change colors of some of the activities. This | Solution: explains how to perform these color changes in V8.
Solution
There might be requirements when you have to change the color of the activities on the Planning Board. There are two ways to change the colors of the activities in V8:
1. Through the Graphical User Interface:
Through the Format tab of the Plann... |
Problem Statement: Does Genetic Algorithms move in consideration of shared resource(M SEARCH BOM) in Plant Scheduler? | Solution: In Plant Scheduler Genetic Algorithms(GA) are not to be used with Shared Resources or Precedence Constraints since these algorithms only work on one asset at a time.
Keywords: GA
Genetic Algorithm
M SEARCH GA
References: None |
Problem Statement: What is purpose of the Intermediate Streams in the Hydrocracker reactor or Catalytic Reformer? | Solution: The purpose of the intermediate streams is to connect the outlet of each reactor (for the Catalytic Reformer) or each bed (for the Hydrocracker). You use these streams in the flowsheet for further analysis or simulation, such as quench systems calculation.
Under Design | Connections tab you will find the Inte... |
Problem Statement: I have assay information in an Excel file. How do I transfer the Excel file to Petroleum Assays? | Solution: The attached case is an example of an Excel file that you can later modify and use it as template. This file contents 5 different crudes in different tabs: Demo 1, Demo 2, Demo 3, Demo 4 and Demo 5. Each crude is different and contents different information. You will have one assay created for each tab with t... |
Problem Statement: How to save a material stream as an assay?
It may happen that for a converged flowsheet, a product stream will be required to be saved and used as an assay. | Solution: Any product material stream connected to a component slate can be saved as an assay
Click the button “Save Stream as Assay” in the Worksheet | Petroleum Assay and then check that it has been added to the Assay Manager list in the properties environment
Check also that the input data and the characterized resu... |
Problem Statement: What equation is used in the Vetere estimation method for Heat of vaporization? | Solution: The Vetere method used by Aspen Plus to estimate heat of vaporization depends on the Molecular Weight (MW) and Normal Boiling Point (TB). The Vetere method is used to estimate heat of vaporization at TB. The Watson equation is then used to extrapolate heat of vaporization to TC. At TB an average error of 1.6%... |
Problem Statement: Does the Naphtha Hydrotreater carry out any cracking reactions? | Solution: The Naphtha Hydrotreater in Aspen HYSYS does not carry out cracking reactions. In order to carry out the cracking reactions, the user can use the component mapper or HYSYS reactors like the Hydrocracker or the Fluidized Catalytic Cracking.
These reactors can be accessed through the Object Palette under Refini... |
Problem Statement: Why do I see a large gap between the calculated and user input D86 curve in Petroleum Assay? | Solution: In Petroleum Assay, user can input distillation data points based on TBP, ASTM D86, ASTM D1160 and ASTM D2887. A continuous distillation curve is then calculated based on the input data.
However, user may see a large difference between the input and calculated curves, specially when any ASTM curve is selected... |
Problem Statement: Why do I get the message you need at least 3 hypothetical components when creating the macro-cut table from Aspen HYSYS Petroleum Refining? | Solution: The message you need at least 3 hypothetical components will appear in the trace window if fluid package does not have at least 3 hypothetical components in the component list or the component list does not contain the petroleum components. The recommended workflow would be to import the component list from p... |
Problem Statement: What is the complete list of CNTLS control parameters? | Solution: CNTLS Parameter
Description
Possible Values
ACODE
Use Encoding A Codes
Yes / C / NONE
AEVER
Activity Editor Version
1 / 2
AFO
Allow FACI Override
Yes / No
ALABELAB
Display Label above activity box
Blank / set or table name
ALABELIN
Display label inside activity box
Blank / set or table name
ATIPSCTL
Activity ... |
Problem Statement: This knowledge base article explains why the supply demand balance report in Aspen Plant Scheduler may not always show the operation description in the report. | Solution: This problem has been observed to occur if routine >ROPR9002 does not exist in the $SIMEND$ macro within the model. Ensure that the >ROPR9002 exists in the $SIMEND$ macro.
Keywords: modeling
configuration
References: None |
Problem Statement: Unable to make DAT file for CAPs cases using the CAS2DAT conversion utility, which generates a 0 byte DAT file. | Solution: CAS2DAT cannot be used for CAPS cases as CAPS cases are protected. If you want to remove unused space from a model use the compress utility (cmprcase.exe).
Keywords: Case format
Converting
Compressing
References: None |
Problem Statement: How does the Lift Gas Control work in the FCC unit? | Solution: The lift gas is mixed with the vapor from the regenerator and goes to the bottom of the riser. The lift gas flow can be specified in the Riser/Reactor page under the Operation tab.
The lift gas can be specified as either volume or mass basis. This is considered to be 100% N2. If this is specified in volume ba... |
Problem Statement: How does a user run command line tools such as ASPCOMP, DFMS, the AP9TO10 converter, or command line Aspen Plus? | Solution: Users need to open the Aspen Plus Simulation Engine window. This can be accompished in two ways:
From the Windows desktop, click Start and then select Programs. Then select AspenTech, then Aspen Plus 10.x, then Aspen Plus Simulation Engine.
OR
Alternatively, a user can double-click on the Aspen Plus Simulatio... |
Problem Statement: In the Plant Scheduler application, there is a report called Problems Report to display the Inventory Problems in the Format tab of the Planning Board contextual ribbon. By default, the Inventory tab of this window shows the following fields:
This window is customizable. This | Solution: explains how to do this customization using an example.
Solution
The following steps will accomplish this:
1. Go to the Developer tab | Commands Panel | Command line | Type: CNTLS.
2. There is a row in this table: (PPLAN) Problem Window Control Set - Inventory. The corresponding cell in this table... |
Problem Statement: What does a ClChng block do?Can it transfer one component from the mixed substream to a solid substream? | Solution: The ClChng block changes the stream class between blocks and flowsheet sections. You can use ClChng to add or delete solid substreams between flowsheet sections. ClChng does not represent a real unit operation. ClChng is just making the transition. It does not convert from one substream to another. Nor does i... |
Problem Statement: When simulating a column using RadFrac with no reboiler and no pumparound to the bottom stage, you will get an error message saying that the bottom stage of the column needs a vapor stream. The error may still appear even if you have a vapor stream entering the bottom of the column.
The error messa... | Solution: If there is no reboiler and no vapor stream to a column bottom, the bottom stage will dry up, which is not allowed in RadFrac. Either a reboiler or a vapor stream must be provided. The vapor stream can be a feed or a pumparound return.
Even if you have specified a vapor feed to the bottom of the column you ma... |
Problem Statement: How is the Pour Point calculated in Aspen Plus?
How can Pour Point be used in a flowsheet simulation? | Solution: When liquid petroleum products are cooled a point is reached at which some of the constituents begin to solidify, and if cooling is continued the oil eventually ceases to flow. The temperature at which this occurs (in a standard test) is recorded as the setting or solid point. The pour point is defined as the... |
Problem Statement: Why does the assay show a status Invalid Fluid Package? | Solution: This message is shown when there is no fluid package attached to the assay.
You can select the fluid package to be associated to the assay from the drop down menu of the Fluid Package cell. This should be done especially when there are several fluid packages in the case.
Keywords: Invalid fluid package, Assay... |
Problem Statement: What is the definition of ECP in the petroleum distillation column? | Solution: ECP is the effective cut point and is usually close to the TBP cut point. There is an explanation of it in the petroleum column simulation word document which is located in the example cases that come with a standard AspenOne Engineering install. Users can access this document by following this file path C:\P... |
Problem Statement: What does the light gas tuning parameter calibrate in the Hydrocracker? | Solution: The light gas tuning parameters adjust the relative amounts of C1, C2, C3, and C4 formed. Some of the reactions are written in such a way that there are multiple product groups.
The C10P can crack to C9P and C1, C8P and C2, C7P and C3, C6P and C4, or two C5s. By default, these products would be produced in eq... |
Problem Statement: The Std Ideal Liq. Mass Density is found in the stream properties as a standard correlation while the Std. Liquid Density [petrol] is found in the petroleum correlations.
Std. Liquid Density [petrol] doesn’t mention that it is using ideal properties. So, why is the value calculated for the Std Liquid... | Solution: The Std. Liquid Density [petrol] and the Std. Ideal Liq. Mass Density are the same because they use the same algorithm that includes the pure components ideal liquid density.
First, the average liquid density is calculated with the equation below.
Where:
Avg. Ideal Liq. Density: average ideal liquid densi... |
Problem Statement: When user tries to open Refining cases (Hydrocraker reactor, Catalytic Reformer reactor, etc) , a message “Intel Visual Fortran run-time error” appears and Aspen HYSYS closes unexpectedly.
This can happen when loading cases from the example library, opening existing files, creating new templates or ... | Solution: in particular) need relatively large chunks of contiguous, so the 2GB is often not enough.Solution
The 32 bit operating systems do have a switch, though, that can be set to allow 3 GB per application.
To enable the 3GB switch on Windows Vista™, Windows 7 or Windows 8:
1. Right-click on the Command Prompt ... |
Problem Statement: How do I calculate the shell-side heat transfer coefficient
and the corrected LMTD for a heat excahnger in Aspen Plus? How do these results compare with other heat exchanger design programs such as B-JAC in Aspen Plus? | Solution: Following are some generalizations about an Aspen Plus HEATX block.
The shell-side heat transfer calculations are based on the
Bell-Delaware method, which is considered to be the best open literature method available. For this method, calculate the shell-side heat transfer coefficient, which is based on an id... |
Problem Statement: My REquil reactor block is not converging! What can be done? | Solution: If an REquil block is not converging, several options are available to aid
convergence.
Explicitly specify the Valid phases for the reactor on the REquil / Input / Specifications sheet. (In Aspen Plus 9, Specify NPHASE and PHASE on the REQUIL.MAIN form in ModelManager or the PARAM sentence for input language.... |
Problem Statement: How can I add a new assay from Petroleum Assay library? | Solution: Below are the steps to add Petroleum Assay from the Assay Library:
1) Add the Fluid package and then go to Petroleum Assay window.
2) Press 'Add' button to add Petroleum assay-1 and double click on it.
3) Pick 'assay source' as 'specified' and select the fluid package from drop down menu.
4) Click on 'import ... |
Problem Statement: What kind of Feed types are avaliable for Refining Reactor Transition? | Solution: When you set up the Refining Reactor Transition in stream cutter, you sometime find some properties may be little bit off your desired properties when you use default fingerprint.
Default feed type:
This may be due to the default which is a VGO material. If you feed is LCO, this may cause the trouble for the ... |
Problem Statement: A resource in the Aspen Supply Planner model is running at three times capacity.
Upon reviewing the resource group mapping, it was found that the resource was also listed 3 times there. Twice where the Resource Groupings are blank and then once where the Resource Grouping is listed as Undefined Resou... | Solution: Duplicate data was accidentally imported into the model (RES and CAP sets) and unfortunately, the duplicates were not being removed during import, so there was no way of getting rid of the bad data. To alleviate this problem, manually delete the bad/duplicate data and re-import the correct data.
Keywords: Res... |
Problem Statement: Jump Start: Delayed Coker Model in Aspen HYSYS Petroleum Refining | Solution: This document is intended as a “getting started” guide. It will cover the process of creating a delayed coking model, including setting up a heavy crude feed with a petroleum assay, configuring a delayed coker unit operation, calibrating the coker unit, and putting a recycle network together.
Keywords: Delaye... |
Problem Statement: The PONA reported in my stream does not sum up to 100% - how do I fix this? | Solution: Follow the steps below to normalize your PONA analysis:
Enter the Basis Environment.
Open the Petroleum Assay that the stream is using.
Navigate to the Analysis tab.
Click the Resolve PONA button.
You can now return to the Simulation Environment to view the results.
Keywords: PONA, Assay, PNA
References: None |
Problem Statement: I am using a wide temperature range to regress VLE data--from below to above the critical point of one component.
Can I regress both the Henry constant and activity coeff. binary parameters together? | Solution: Yes, it is possible to regress Henry and NTRL, UNIQUAC or Wilson binary parameters simultaneously with the data regression system.
However, it is better to regress the Henry's constants first using the low-concentration data (up to 5% solute), and then regress the activity coefficient binary parameters alone,... |
Problem Statement: After v8.7,the handling of pipeline segments have changed. What is the new PIPELINE_INV table? | Solution: Before v8.7, the pipeline segments where limited to a count of 2 (primary and secondary pipelines).
After v8.7, this has been enhanced that there can be any number of segments for a pipeline route. With this new change there have been certain database changes, one of them being that PLINV has been replaced by... |
Problem Statement: The Compressor (Compr) block will fail if the flowrate exceeds the Stonewall limit. What is the stonewall? | Solution: Surge and stonewall are the minimum and maximum flow rates between which a compressor
must be operated. The problem is that the compressor is operating above the stonewall.
The following error message is generated by Aspen Plus:
* WARNING WHILE EXECUTING UNIT OPERATIONS BLOCK: R-300-1 (MODEL: COMPR)
... |
Problem Statement: How do I input petroleum properties for the first cut in Macro-Cut Table? | Solution: When characterizing a petroleum assay using the Macro-Cut Table, it is assumed that the distillation data includes light ends information. So the first assay cut will have a summation of hypo components and all the lighter pure components.
It is true for the Distillation Yield Vs Temp, as well as for other Pe... |
Problem Statement: What is required to migrate from Aspen Plus 9.x to 10.x?
Will the Aspen Plus 9.2 and 9.3 files will work in Aspen Plus 10? | Solution: Aspen Plus simulations are designed to be upwardly compatible, provided that the Aspen Plus simulation files that are version independent are saved before changing Aspen Plus versions. Due to continual advances in the Aspen Plus architecture, some modifications may be required in order to use older simulation... |
Problem Statement: Why do I get an Out Of Memory Exception using 32 bit Aspen Supply Chain Manager and a large case file (over 1 GB)? | Solution: For such a larger case, it will hit the 2G limit at some point. It is our recommendation you use 64 bit SCM.
Keywords: None
References: None |
Problem Statement: What is the best way to open Aspen Plus runs with Visual Basic (VB) applications when the License Manager is used? | Solution: When using License Manager with Aspen Plus, a Connect to Engine Dialog box will be displayed prompting the user to specify the simulation engine platform information. This dialog box will be displayed even though the simulation engine and user interface reside locally on a PC. An acknowledge dialog box will a... |
Problem Statement: How do I solve “Reactor TransitionObject” problems in the message window? | Solution: If you have a Catalytic Reformer that is not solving, look in the message window below the PFD, to check if the error is such as PNA missing data.
Normally this kind of error comes when there is a missing parameter between the Main Flowsheet and the Reactor Sub-Flowsheet or the other way around. Double cli... |
Problem Statement: How are pseudocomponents generated in Aspen Plus 10? | Solution: An example of pseudocomponent generation:
Start Aspen Plus session. On the file selection window, in the section titled Create a New Simulation Using select Template, and click OK.
A list of predefined templates comes up. Select Petroleum with English Units. Leave the Run Type as Flowsheet (default).
In the... |
Problem Statement: This | Solution: is intended for users who have basic configuration experience in Aspen SCM.
In the Planning Board, there is an option to run routines when the user right clicks on an activity. The followingSolution explains how this can be configured.
Solution
In the table CNTLS there is a row “(GWFRAME) Gantt Window Frame” ... |
Problem Statement: How to import Assay from Assay library to Material Stream directly? | Solution: Open an example case Petroleum Column.HSC from Refining Cases folder from Open Example Case from Hysys
+ Select Material Stream Material Stream: 1 from Object Palette
+ Worksheet/Petroleum Assay/ Please select Create New Assay On Stream from drop down box
+ Click on Petroleum Assay Specification tab
+ In new ... |
Problem Statement: Aspen Plus uses a default erosional coefficient of 100 for the Pipe Unit. Is this a good value for all applications and why should the erosional coefficient be considered in pipe designs? | Solution: When sizing a pipe, the selected inside diameter needs to be large enough so the erosional velocity is greater than the expected pipe velocity. This prevents unwanted erosion inside the pipe.
On the PIPE PARAMETERS sheet of the PIPE unit's setup, a default erosional coefficient of 100 is displayed. This defau... |
Problem Statement: Why is the Makeup2 flow rate zero for HPS Loop1 / 2? When is it appropriate to use a positive number? | Solution: The makeup rate is calculated to match the user specifications for Gas to Oil ratio and reactor temperatures. We allow the user to input a second makeup flow if they desire to have a second makeup flow with a different composition (e.g. high purity H2). If the user specifies a non-zero flow for Makeup2, note ... |
Problem Statement: What's New in Aspen HYSYS V7.2 - Crude Oil Characterization | Solution: In HYSYS Petroleum Refining V7.2, HYSYS based crude characterization expands from Oil Manager methods to a new input form called MacroCut that forms a bridge to powerful third party crude characterization software packages, i.e, SpiralSoft Crude Manager and Haverly H/CAMS.
In the Simulation Basis Manager, a n... |
Problem Statement: Can Tabpoly data be entered in the DFMS input file for User or Inhouse databanks? | Solution: No, this is not a feature of DFMS.
TABPOLY-DATA is not a valid DFMS keyword.
Keywords: inhspcd
user databank
References: None |
Problem Statement: Why do I get consistency errors for Molecular Weight (MW) in Aspen HYSYS V7.3 CP3 (and higher) with a file already converged in Aspen HYSYS V7.3 CP2? | Solution: The MW related consistency error is due to a MW fix in HYSYS V7.3 CP3. This fix re-estimates the MW's for hypo components when their density changes. So when re-run a file in HYSYS V7.3 CP3 with a converged case in V7.3 CP2, the MW is updated and consequently it can result in a consistency error.
The current ... |
Problem Statement: Where Can I check blending property method calculation description for various petroleum properties in Refsys Assay Manager? | Solution: Appendix A in Unit Operation Guide in Hysys Petroleum Refining contains brief description of the blending rules of the physical and petroleum properties in petroleum assays
Unit Operation Guide can be located in below path if user install Hysys application in C drive
C:\Program Files\AspenTech\Aspen HYSYS... |
Problem Statement: What can I try to converge a HBED? | Solution: When your HBED failed to get convergent, you can do the following:
1. Go to Simulation Engine tab and Change Solve Failure Recovery Option to Restore Variables in Solver settings page
2. Ignore and unignore HEBED two times to see whether you can get it convergent.
3. If not, go to Solver settings page and act... |
Problem Statement: How can I add a new Petroleum Assay from HYSYS oil Libraries? | Solution: Before you start is recommended, if you want to use REFsys, to select one of the available component list.
In the Simulation Basis Manager go to REFsys Assay Manager.
Import a new Assay and Associate the Fluid Package. Select Macro-Cut Table
Inside the Macro-Cut Table, you will be able to open the list of H... |
Problem Statement: What is the procedure to migrate custom icons from Version 9 to Release 10 of Aspen Plus? | Solution: For Release 10.0-1, mmgr9.def and a patched version of icondef must be sent to customer. Both version 9 and Release 10 must be installed to perform migration.
Setup to run Aspen Plus Release 9 in a working directory.
Copy your customized Release 9 icon definition file (mmg.def) into the working directory.
Cop... |
Problem Statement: What is the Definition of the Equilibrium Constant (Keq) reported by REquil? | Solution: The chemical equilibrium constant (Keq) used in the REquil block in Aspen Plus is defined as:
Keq = Pi (Activities of Product Components) / Pi (Activities of Reactant Components)
where Pi denotes the multiplication operator.
The Activity of Component i (denoted as ai) is defined as:
ai = Fugacity of Component... |
Problem Statement: What is the difference between Hysys Oil Manager and Refsys Assay Manager? | Solution: User can create a petroleum assay using the options in the Refsys Assay Manager window or in the Oil Manager tab. The differences between the petroleum assays created in Refsys Assay Manager and Oil Manager are listed in the following table
Keywords: Oil Manager, Refsys Assay Manager etc;
References: None |
Problem Statement: What is the difference between various petroleum components list available under import components in Simulation Basis Manager? | Solution: Aspen RefSYS can represent all oils in a single case with a single component slate. When user imports component list from components list directory then user can see below options
Petroleum Component List
Description
petroleumComp1.cml
Various Component list from Hysys Databank & Hypo Components Normal boil... |
Problem Statement: The default Unit of Measure in the Planning Board is Pound (LB). This unit of measure (UOM) is used when creating new activities on the Planning Board through the GUI. When Aspen Plant Scheduler is implemented in countries where default UOM is different from Pound (LB), the Planning Board’s UOM shoul... | Solution: explains how to change this.
Solution
Go to the Developer tab | Commands Panel | Command line | Type: APPDATA.
This command is going to open the table called APPDATA. In this table, find the row titled: “(PBM_MODEL_UOM) Model UOM (entry in UOM)”. The entry in this row, is the current UOM of the Planning Board... |
Problem Statement: Is it possible to number RadFrac stages from bottom to top? | Solution: Aspen Plus internal calculations are always performed using a top-down stage numbering convention. However the RadFrac text report can be customized to present the results in a bottom-top numbering convention. The bottom-top stage numbering convention may be enabled on the RadFrac's Report | Profile Options s... |
Problem Statement: Aspen Plus can report the pH of a stream as a Prop-Set property. What assumptions are made in the calculation of pH in Aspen Plus, and what will cause the pH to be out of the range 0 <= pH <= 14 ? | Solution: The pH of any aqueousSolution or stream in Aspen Plus can be calculated using the property-set (Prop-Set) property PH. This property is based on the water dissociation equilibrium:
2
H2O
<===>
H3O+
+
OH-
or
H2O
<===>
H+
+
OH-
Note: Aspen Plus can treat acidic species as either H+ or H3O+. However, use of H... |
Problem Statement: What is the meaning of Multiplier Shift on the Shift Props page of the Assay tab of the Assay Manipulator? | Solution: Multiplier shift: When checked, property curve will be shifted up and down by a common multiplication factor. If not, there will be a common addition factor applied to the property curve to match the given bulk value. The multiplication option is recommended.
Keywords: Multiplier Shift
References: None |
Problem Statement: The XPRESS optlog file name is restricted to 8 characters. You have several users that could potentially solve the same case but may not save it. Typically, you will suffix the optlog with initials and datetime stamp. However XPRESS log files does not accept a name greater than 8 characters which mak... | Solution: The log file name is hard coded and cannot be changed. A suggested naming structure would be xxmmddyy.log
Keywords: optlog
XPRESS
References: None |
Problem Statement: Which petroleum properties can be configured with bulk property data without the curves? | Solution: Please note that thisSolution is applicable for Aspen HYSYS Petroleum Refining V7.3 but not for the older version.
The following is the list of petroleum properties which can be added in the macro-cut table without having data at different cut points.
Sulfur content
Nitrogen content
Basic nitrogen content
Con... |
Problem Statement: Can Aspen Plus be used to model polytropic expansion?
Why do I get the following error message about improper outlet pressure specification when I run my Compr block?
*** SEVERE ERROR
IMPROPER OUTLET PRESSURE SPECIFIED FOR THE GIVEN UNIT INPUT PRESSURE = (0.6895E+06) OUTPUT PRESSURE = (0.1379E+06)
SK... | Solution: Aspen Plus can not model a polytropic expansion process. The only option for modelling expansion turbines is Isentropic.
In the attached example file, both of the Compr blocks are set to expand the inlet gas stream from 100 psia to 20 psia outlet pressure.
The Compr block POLYTROP is specified to expand throu... |
Problem Statement: What is Kinematic Viscosity @ X C in petroleum properties? | Solution: Kinematic viscosity is calculated for the liquid phase & the default value is 37.78 C (100 F).
The value for temperature can be specified in the correlation manager (Tools/Correlation Manager)
First, pressure is determined using TV flash (Vapor fraction = 0) and then the kinematic viscosity is determine... |
Problem Statement: How do I update initial values for calibration factors after running a calibration in Aspen HYSYS Hydrocracker? | Solution: The initial values for the calibration factors are updated after running a calibration if the user re-checks the box for Update Initial Value.
Keywords: Hydrocracker, calibration, Initial value
References: None |
Problem Statement: What do the different flow regimes mean in the results of the pipe model? | Solution: Please see attached word file for descriptions and diagrams.
Pipe and Pipeline predict patterns, often called flow regimes, for two-phase horizontal and upward flow. For horizontal flow, the method of Taitel and Dukler, 1976 is used. For upward flow, the method of Taitel, Bornea, and Dukler, 1980 is used.
T... |
Problem Statement: Jump Start: Visbreaker Model in Aspen HYSYS Petroleum Refining | Solution: This document is intended as a “getting started” guide. It will cover the process of creating a Visbreaker model, including how to set up a heavy crude feed with a petroleum assay, configure a Visbreaker unit operation, calibrate the Visbreaker unit, and set up a simple component splitter.
Keywords: Visbreake... |
Problem Statement: It is possible to vary the Feed Rate in a RadFrac Design Spec and Vary. The Feed Rate variables is hardwired to be mole-flow. Is it possible to enter the flow in units of mass-flow. | Solution: Unfortuntely, this can not be done in the current system since the block does not have the information about the basis of the stream flow. Mole-flow units must be used.
Keywords: radfrac
FEED-FLOW
References: None |
Problem Statement: How does one import an Aspen HYSYS assay into Aspen HYSYS Petroleum Refining (RefSYS)? | Solution: Below are the steps required to import an Aspen HYSYS Assay to Aspen HYSYS Petroleum Refining.
Note: User should have Hysys Petroleum Refining License
Enter the Simulation Basis.
Click on Extend Simulation Basis Manager button. It is at the bottom of the Simulation Basis Manager window. The RefSYS: Petro... |
Problem Statement: What type of numerical algorithm is used for RGibbs - Gautam-Seider, NASA, or RAND? Can it handle multiple pure solids? | Solution: The algorithm to minimize the Gibbs free energy function used in RGibbs is Gautam-Seider. It can handle multiple solids.
Some optimization approaches typically have employed Newton type methods so that theSolutions found are highly dependent on starting point, and localSolutions can at best be guaranteed. The... |
Problem Statement: What's New in Aspen HYSYS V7.2 - Refinery Reactor Calibration | Solution: HYSYS Petroleum Refining (RefSYS) introduces rigorous refinery reactor models into HYSYS based flowsheets. The reactor models are available from the RefSYS palette (F6) shown below:
The following reactor models are available:
Cat Cracker for FCC units
Hydrocracker for multi-bed hydroprocessing units
Reformer ... |
Problem Statement: What is the SI Top and SI Bottom number in Petroleum Distillation Column? | Solution: SI Top & SI Bottom are called fractionation indices. SI Top & SI Bottom signifies how good the separation between the products (Distillate and Bottoms) is. Refer to the attached documentation from AspenHYSYSRefiningV7_2-Ops.pdf, page 6-4 of AspenHYSYSRefiningV7_2-Ops.pdf shows ln(Di/Bi) vs NBP.
SI Top = -1/S1... |
Problem Statement: What is Data Regression (DRS) testing when it says TEST LIQUID LIQUID EQUILIBRIUM RESULTS AGAINST THREE PHASE FLASH ALGORITHM? | Solution: All data regression systems based on minimization of Gibbs free energies perform only local minimum analyses. Thus, they only find local minima instead of the global minimum. This leads to potential cases where the local minimum conditions may be satisfied for more than one set of parameters. Therefore, as wi... |
Problem Statement: I want to increase the octane number of some of my gasoline blending stocks in order to run quick 'what-if' scenarios. I don't want to run a full simulation of my refinery for each scenario. How can I do that? | Solution: TheSolution here is to use the Assay Manipulator unit operation in Aspen RefSYS. The Assay Manipulator is used to shift or change petroleum properties for a stream in your simulation.
Add an Assay Manipulator through the RefSYS Object Palette (F6) or through the Flowsheet | Add Operation | Refinery Ops | Mani... |
Problem Statement: How to make a linear change of properties using Assay Manipulator? | Solution: In the assay manipulator you can specify the targets either entering the value for the target or a value for the difference between the product and feed. For example, if the sulphur content in the feed is 2% and if you want this to be changed to 2.5%, you can either enter this value in the target field for th... |
Problem Statement: What is the upgrade / migration path for SMCA to DMCplus? | Solution: Will DMCplus v1.2 include tools to convert SMCA models to DMCplus?
Yes. I expect that we will make an attempt at reading the DEF file for the SMCA controller and fill in as much of the CCF file as makes sense. It will not be a completeSolution, because there are quite a few things that do not have a unique tr... |
Problem Statement: What types of Data can be used to regress a parameter, such as the Ideal Gas Heat Capacity, CPIG? | Solution: The following table summarize the types of data used to regress various parameters.
This list is not exclusive, and contains the most commonly regressed parameters.
Parameter name
Model
Property method
Data types you can use *
BWRKV,BWRKT
BWR-Lee-Starling
BWR-LS
VLE, LLE or VLLE Data,
KVL, KLL
C... |
Problem Statement: How do I configure the Aspen Petroleum Scheduler Integration Configuration tool in order to send information from Aspen PIMS to Aspen APS? How do I visualize that in APS? | Solution: In the next example the Volume sample model from PIMS and the demo model from APS are used.
In APS follow the next steps:
1.-Delete the Information from the next Access tables:
ORION_MGR_PIMS_KPI_DATA
ORION_MGR_PIMS_KPI_TAG
ORION_MGR_PIMS_KPI_IMPORT
2.- Go to Integration/Pims to APS/ Map Planning targets ... |
Problem Statement: Is there an automation call to detect the user's current/active event screen name? | Solution: There is an automation call named GetScreenName(), which returns the current Gantt screen name.
The automation call GetScreenName() as per the following VBA syntax.
Sub DisplayEventScreen()
Dim pssl As Object
Set pssl = CreateObject(Orion.CollectionInterface)
... |
Problem Statement: The liquid product from the vessel contains vapour when the level of the vessel goes low. | Solution: The nozzles in the vessels are side ways. When the liquid level becomes less than the diameter of the bottom pipe nozzles then vapour will come out with the liquid product.
It is necessary to provide the correct diameter of the nozzles to accurately represent the vessel operation. You can access the nozzle se... |
Problem Statement: What tables are affected when using Aspen PIMS to Scheduler Interface? | Solution: 1. When we import events from OrionPimsInt.exe, the records are added to stage tables. We can use Import->Events in APS to import the events.
2. When we delete events from OrionPimsInt.exe, the records are only deleted from the stage tables. The events which were added to core tables will not be affected.
Ke... |
Problem Statement: After installing Aspen Petroleu Scheduler / Aspen Refinery Multi-Blend Optimizer, the Aspen Excel Integration Utility (EIU) is not shown in the Excel Addins. When the user tries to install it by double clicking the .vsto file from the excel utility folder (C:\Program Files (x86)\Common Files\AspenTec... | Solution: Open folder
C:\Users\[your window logon id]\AppData\Local\Apps\2.0
Underneath, there are some folders named with combination of numeric and characters.
Click each folder to go into its subfolder until you can see files. If the user sees any file name started with ‘asp’ then remove its parent folder. F... |
Problem Statement: Adding date/time stamp to print file name | Solution: The DMCplus Online help states:
ACOD_PRT_FMT Determines the format of the date appended to the name of .prt files. PRT files are output once per cycle when the PRTSWC entry is greater than 0. PRTSWC is decremented at the end of each cycle. Valid values are:
%d: day of the month (01-31)
%m: month (01-12)
%y: 2... |
Problem Statement: Installation of the CM50S Cim-IO server fails during the VMSINSTAL phase.
%CIMIO_CM50S0-E-NOCM50, Cannot determine CM50S version.
%VMSINSTAL-E-INSFAIL, The installation of CIMIO_CM50S0 V32.3 has failed. | Solution: The CIMIO CM50S Server software installation and startup scripts determine the version of CM50S by using the Logical CM50$VER. If they cannot find this logical or if the logical does not have the correct format the installation or startup will fail. The logical can be displayed by using the show logical comma... |
Problem Statement: 'No Composite licenses available on server.' message is logged in a CLP err file, and the CLP cannot start. Even if the mal-entries and mal-settings of the member Aspen DMCPlus controller were the cause of the problem. | Solution: ImplementingSolution 120532 which enables to log the member Aspen DMCPlus controllers problems.
Keywords: composite licenses
Applicable version 6.0.1 only
References: None |
Problem Statement: After transitioning to Aspen HYSYS Dynamics, a pipe segment will report the following warning:
Operation <<Pipe name>> has an uninitialized stream which is needed for a volume balance.
Please copy over another stream or provide initial conditions and flash it.
In most cases, the Integrator will s... | Solution: The problem is caused by corruption of the holdup k-values calculated during the transition. The only way to eliminate the erroneous k-values is to rebuild the corresponding pipe segment.
Obvious symptoms of this problem include strange k-values as seen in the Performance | Segments pagetab when first switchi... |
Problem Statement: How to obtain the symmetrical (GAMMA) and asymmetrical activity coefficient (GAMUS) in user subroutine? | Solution: GAMUS is for unsymmetrical molecular species (i.e. those in the Henry's list) and GAMMA is for all other components (include charged species like electrolytes)
There are different ways to get the symmetrical and asymmetrical activity coefficients:
1. Retrieve the binary interaction parameter for the act... |
Problem Statement: How do you use an activity coefficient property method to model a system that consists of non-water polar compounds and light gases modeled as Henry components when no binary data exists for the Henry components? | Solution: TPXY or Henry Constant data can be used to regress the Henry parameters using the Data Regression System. Without any data there are a few options:
1. See if there are Henry parameters for the Henry components and some other common polar compound such as benzene or cyclohexane by adding some of these co... |
Problem Statement: We have seen in some cases that the simulator shows different values when using OXE and when not using it. How can I identify the cause of the problem? | Solution: In order to identify the root cause follow the next steps:
1. Change the DBGINFOLEVEL to 1000 in the config table.
2. This setting will slow down the simulation a lot because it will write all the calculations in debug file; formula and calculated value. So, we recommend to reduce your number of mo... |
Problem Statement: How can I add an assay using Petroleum Assay if I have Laboratory Assay results or Cut data. | Solution: To add an Assay using Petroleum Assays, you need to do the following.
1) Create a new simulation. You do not need to add components or a property package, you can go straight to the Petroleum Assay folder.
2) Click in the Add arrow>Manually Enter
3) You can use the Multi Cut Properties to a... |
Problem Statement: A mnemonic of UNKNOWN is used whenever the CIM-IO error code is not present in any CIM-IO error file on the DMCplus computer. For the CIM-IO server, this can be because the error file
(CIMIOETC:CIMIO_CM50S_ERRORS.DEF) is from a previous version or because the error code is a Honeywell (or other DCS) ... | Solution: CM50
Honeywell return codes are either between 0 and 255 (value statuses) or they are a large number of the format 215xxxxxx (return statuses). These can be looked up in the appendices of the CM50S User's Guide or online using the @CM50$LIB:CM50 utility.
$ @cm50$lib:cm50
Use the VS option for up to 3-digit er... |
Problem Statement: DMCplus and CIM-IO Kernel Compatability | Solution: Here is a table of CIM-IO Kernel versions and DMCplus versions. The consequences of each combination are given.
CIM-IO DMCplus DMCplus DMCplus
Kernel 1.04.xx 1.10.00 1.10.01
4.6b [1] [1] [1]
4.7a [1] [2][3] ... |
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