question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Can we model differential condensation in HEATX block in Aspen Plus? | Solution: Heat transfer calculation in case of differential condensation is not supported with Aspen Properties. So, when HEATX block is used in either short-cut or rigorous mode, it does not consider the effects of differential condensation as it uses Aspen Properties.
Only way to implement this would be to use BJAC p... |
Problem Statement: When simulating plate exchanger, EDR has access to vendor plate exchanger models such as APV, Alfa Laval and Trantor. But the plate models in the list is outdated. For example, there will be APV C series exchangers out soon, but what is available in EDR are SR14 exchangers, which are two models old. ... | Solution: We add a new feature in V11 which allows the customer to edit vendor plate data and add/update any plate model into customized database.
1. Go to Plate/ Input/ Exchanger Geometry/ Plate Details, and click on “Plate Databank”
2. In the plate databank, select the manufacturer, plate, Chevron Angle, etc. The... |
Problem Statement: What is the cause of non-stop integration issue when multiple bed is running in cycle? | Solution: Usually multi-bed operation is synchronized with Cycle Organizer. Under the “Control” option, user can assign either time driven or event driven option. The non-stop integrator issue happens mostly in the case when stop criteria is event driven. The root cause is that the stop criteria is never satisfied.
T... |
Problem Statement: Which vaporizer type could be suitable for ‘Dry evaporator type screw chiller' | Solution: It can be modeled when vaporizer type is chosen as 'forced circulation'
A sample case is attached for a reference.
Keywords: None
References: None |
Problem Statement: How to create material pool for blend components in MBO? | Solution: To create material pool for blend components in MBO, please refer to the following two methods.
Method 1: Visualize the blend components pool trend.
1.Created a new material, e.g. COMPONENT.
2.Created material service events against the component tanks, e.g. THCL and TLCN, for the model horizon.
3.Created ... |
Problem Statement: When I open Aspen Plus or Aspen HYSYS, the following error message shows up:
apedconnectionerror.log
Failed to initialize the Aspen Properties Enterprise Database.
Using the configuration file from C:\ProgramData\AspenTech\APED VX.X\casasecd\config.aem
Please use the Aspen Properties Database Configu... | Solution: The error message indicates that our APEA built-in databases are not correctly configured in your machine. In order to fix this, please do the following:
1. Go to the shared folder: C:\ProgramData\AspenTech\APED VX.X (replace X.X with your Aspen Properties version)
2. Run DeleteDBInstance.bat. as administrato... |
Problem Statement: How to model internal dividing redistribution in Aspen Plate Fin exchanger? | Solution: In some cases, a stream is only present for a fraction of the length of a set of layers and then exits the core, which leaves that set of layers empty. To avoid having empty layers in a fraction of the exchanger, a second stream can be diverted from another set of layers to occupy the empty region. This secon... |
Problem Statement: Why do i see a difference between the closing inventory between APS and MBO for the Component Rundown tanks? | Solution: This can happen because the COMP_RD table was not synced with APS and did not have the latest published values. This can be resolved by refreshing the data in the COMP_RD table with the latest published values from APS.
To sync the data in COMP_RD table with APS, you can follow the below steps:
(1)Clear all t... |
Problem Statement: How to specify penetrations and distances for nozzle projections in Shell and Tube Mechanical? | Solution: When specifying the nozzle location, there may also be intent on specifying a penetration distance for the nozzle. Let’s take this scheme as example:
Nozzle in this case has 12” out of the tank and 15” as penetration. To achieve this first we review the nozzle being specified under Nozzles-General:
Once noz... |
Problem Statement: How to retrieve diffusion coefficient of species in liquid mixture along the length of Plug Flow Reactor ( PFR)? | Solution: For this purpose, property set DMX can be utilized. DMX reports diffusion coefficient of a component in liquid mixture.
First please create a property set with DMX and in “Qualifier” tab select phase as “Liquid”.
Then from PFR > Report > Properties, select the property set (DMX).
Now once the flowsheet is so... |
Problem Statement: I need to convert a PRO//II file to Aspen Plus file. How could I do it? | Solution: You could use the PROII to Aspen Plus convertor.
1. Open PROII to Aspen Plus convertor under C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Aspen Plus.
2. In the toolbar, make sure Aspen Plus is selected from the list.
3. Click “open” button on the top left corner, navigate to the file you want to ... |
Problem Statement: What is the difference in the Aspen Capital Cost Estimator (ACCE) M and N feature? | Solution: The M feature suppresses the bulks and essentially runs ACCE as Aspen In-Plant Cost Estimator. The N feature suppresses the bulks (volumetric model), but allows for other ACCE features such as multi-contractors.
See table below for more details on what each of these option includes and suppresses:
A = Allow... |
Problem Statement: How to calculate the enthalpy of water using Steam Tables reference state? | Solution: ASME Steam Tables use the triple point of water (0.01 C and 611.657 Pa) as the reference state for the enthalpy calculations, which is different from the reference state used by Aspen Plus (Ideal Gas @ 25 C and 1 atm).
An alternative to estimate an enthalpy of water in Aspen Plus equivalent or similar to the... |
Problem Statement: How is objective function OBJFN calculated in PSCP? | Solution: In PSCP, the objective function is calculated by following equation:
Objective Function =
Sales Revenue (T. Demand)
+ Exchange Revenue (T. Exchange)
– Purchases (T. Supply)
– Exchange... |
Problem Statement: How can I create T.Exchange in PSCP? | Solution: We can create T.exchange to represent exchange contracts in refinery/terminal transportation and trigger the model to deliver a material at one node, and receive material in exchange at a different node.
The material received may be the same as, or different from, that delivered. You may also define pricing d... |
Problem Statement: What is the difference between any and span keywords in PSCP? | Solution: In PSCP, we can use predefined keywords “Any” and “Span” for nodes/periods in multiple tables.
Keyword any is used to specify the value valid for all unspecified nodes/periods. In other words, use keyword any to identify a default value that is used when a specific value is not otherwise specified.
Keyword sp... |
Problem Statement: How do I create a PSV Excel Datasheet in Aspen HYSYS or Plus V11? | Solution: Starting in V11, Datasheets are transferred into Aspen Basic Engineering (ABE) which should be installed along with Aspen Plus and/or HYSYS. From the ABE environment, datasheets may be exported to Excel via the steps below:
Part I - Connect to the Workspace
1) After the PSV calculations have been finalize... |
Problem Statement: Some workflows shared diagrams which may need different notes depending on the case. So, how can one set up notes label for a PFD only? | Solution: In the Drawing Editor there is an option to create note labels on a single PFD under Label | Create on this diagram only. This note label will be only visible on this PFD.
Keywords: Notes Label, Create on this diagram only, PFD.
References: None |
Problem Statement: How can I access parameters, such as AIT and FLASHPT, from the pure component databanks? These parameters are listed as present in the Pure Component Databanks, but not visible from Aspen Properties/Plus. | Solution: There are some parameters available in the Aspen Properties Databanks that are not used by any property method. These parameters can be accessed through the Database Manager – Aspen Properties.
They can also be accessed in the user interface by typing the name of the parameters on the Customize | User Parame... |
Problem Statement: How can I create capacity constraints in PSCP? | Solution: To create capacity constraints in PSCP, there are two types of tables we need to use:
Defines Limits – CapacityRows
Defines Capacity Constraint:
CapInventory - defines inventory capacities
CapSupply - defines capacities applied to supply columns
CapDemand - defines capacities applied to demand columns
CapSegm... |
Problem Statement: How do I turn off all installation bulks in my ACCE project? | Solution: You can choose to deactivate the volumetric model in an ACCE project in the Project Basis View | General Project Data form. Here you will find the option Suppress default equipment/area/project bulks option.
When M is selected, ACCE will function just like Aspen In-Plant Cost Estimator (AIPCE). The M option... |
Problem Statement: How does ABPD calculate time for Evacuate and Pressurize operations? | Solution: Aspen Batch Process Developer (ABPD) uses the Ideal Gas model to calculate the amount of gas needed to Pressurize/Evacuate a vessel from one initial pressure to a final pressure:
Where:
M = the mass of gas required
V = the free space in the unit
Pf = the final pressure of the unit
Pi = the initial pressure o... |
Problem Statement: How to use different MIP types in PSCP model? | Solution: MIP is normally specified by using the MipType field in the Supply, Demand, Transport, Operation and Collector tables. There are 4 types of MIP structure we can set up in PSCP model:
Threshold
The Min field is treated as a lower threshold activity limit. This activity must either be zero (0.0) or less than th... |
Problem Statement: How to verify Aspen Multi-Blend Optimizer has been successfully installed? | Solution: This Tech Tip provides a description of the check points to review and ensure Aspen Multi-Blend Optimizer was installed successfully.
Open Aspen Refinery Multi-Blend Optimizer
From Start Menu in your computer Open MBO, you will be asked to Specify a Working Folder, is important that the final user has all t... |
Problem Statement: What is causing the runtime error to appear in Aspen HYSYS Blowdown Utility? | Solution: Small difference in time-step is a lot of unnecessary data. Changing the value to a big difference in time-step, such as 1,50,100 will get rid of the error message. This is because it will run to the halt time.
If it needs to run to the halt pressure, then you need to increase or decrease the halt time.
Keywo... |
Problem Statement: How can I make table snapshots show properly in PIMS AO? | Solution: In PIMS-AO, we can view tables from model tree in a quick method. Directly clicking on the table tab will show up snapshot of the table.
If the tables are not shown up properly in PIMS-AO, click View>>Restore Table Grid will restore table view.
Keywords: None
References: None |
Problem Statement: I have created a custom pipe spec with a flange class of 150. However, when I apply it to a pipe with a control valve, the control valve flanges are still estimated as class 300. How do I change my control valve flange class to 150? | Solution: There is an option to set the Control valve minimum class to 150. Its default is 300, which is why control valves will still have 300 class flanges even with 150 specified on the custom piping specs.
In V9:
This option is available from the component Options | Pipe - General Specs form.
In V10:
This opti... |
Problem Statement: By default, OPCs contain a document number rather than a name (on some projects, it could be a description instead). How can one set up attributes to enable OPCs to contain something other than the Document Name? | Solution: In the CLE (Class Library Editor) one can check the Class View used in this label which is “New Sheet Connector”. The Class View available in the Standard Data Model is named as “GraphicDefinerSheetConnectorNew”. Then, create a copy of this Class View and include the attributes that you would like to see, suc... |
Problem Statement: Some workflows require to show an item object in dashed lines to differentiate from initial scope. So, how can I show future items and lines as future scope in the Drawing Editor? | Solution: There are plenty of type of lines which may be selected from Drawing Editor. Just right-clicking on the equipment and selecting Properties | Format | Style, one can find a “Future” line which shows dashed lines in grey colour.
Doing this helps to differentiate between initial and future scopes on equipment.
... |
Problem Statement: How can I modify the *.appdf file being used by my Aspen Plus Dynamics model to either update the component list or choose a different property method? | Solution: Whenever it comes to updating the *.appdf file of an Aspen Plus Dynamics model to either add / remove components from the component list or use a different property method, a means of doing so is by importing an updated *.aprbkp file into the Aspen Plus Dynamics model.
It is also a useful workflow to get to ... |
Problem Statement: How can I plug more than 500 tubes in Aspen Shell & Tube Exchanger? | Solution: Aspen Shell & Tube Exchanger (EDR) has a limit of 500 for the number of plugged tubes you can model. However, there is an easy workaround you can try to overcome this limitation.
The program allows you to specify the number of tubes in the exchanger, but internally it also has an algorithm to calculate the m... |
Problem Statement: If one would like to edit the Expansion Template found in the Drawing Editor’s Symbol Library | Primary Expansions, where should these modified: using the Graphic Definer or Drawing Editor? | Solution: The Expansion Templates are created and may be modified in the Drawing Editor and not using the Graphic Definer. Although, one can edit an existing Expansion Template in the drawing editor to see the Class View selected for it.
Keywords: Expansion Template, Primary Expansion, Edit.
References: None |
Problem Statement: How to change the Units of a Product shipment event from VOL/Day to VOL/Hour in APS? | Solution: By default, the UOM of any Event is set from the Events Default tab in the APS Settings Window.
Refer Screenshot:
So the Unit can be changed from the Events Default Tab from VOL/Day to VOL/Hour as shown below:
Once changed in the Settings dialog box, when an event is open you can see the event showing the ... |
Problem Statement: How to setup SMC files on PIMS and APS: A detailed guide | Solution: SMC stands for Sub Model Calculator, which is another mode of adding APS logic, but is a popular link with PIMS, where we can export PIMS submodel behavior into APS. The first step to using this functionality has to be from the PIMS side, where an SMC file has to be created (.smc). This file will store data r... |
Problem Statement: When using Acid Gas cleaning option in Aspen HYSYS, some tray efficiencies are higher than 1, which is not reasonable. | Solution: When calculating tray efficiencies, HYSYS uses Murphree efficiency theory:
When the denominator of this definition of Eff (i,j) is close to zero, the efficiency can change arbitrarily from negative infinity to infinity. When xi,j and yi,j are small, the uncertainties are larger. So the tray efficiency could ... |
Problem Statement: How do we back up our APS/MBO database model? | Solution: There are two types of common model dbs. One is in Microsoft Access, and the other one is SQL server. If your model is in Microsoft Access, you can directly copy and paste the model file to a different location on your machine/or any other location. If your db model is in SQL, then a backup process needs to b... |
Problem Statement: How to create material pool for blend components in MBO? | Solution: To create material pool for blend components in MBO, please refer to the following two methods.
Method 1: Visualize the blend components pool trend.
1.Created a new material, e.g. COMPONENT.
2.Created material service events against the component tanks, e.g. THCL and TLCN, for the model horizon.
3.Created ... |
Problem Statement: When I open Aspen Plus or Aspen HYSYS, the following error message shows up:
apedconnectionerror.log
Failed to initialize the Aspen Properties Enterprise Database.
Using the configuration file from C:\ProgramData\AspenTech\APED VX.X\casasecd\config.aem
Please use the Aspen Properties Database Configu... | Solution: The error message indicates that our APEA built-in databases are not correctly configured in your machine. In order to fix this, please do the following:
1. Go to the shared folder: C:\ProgramData\AspenTech\APED VX.X (replace X.X with your Aspen Properties version)
2. Run DeleteDBInstance.bat. as administrato... |
Problem Statement: How to model internal dividing redistribution in Aspen Plate Fin exchanger? | Solution: In some cases, a stream is only present for a fraction of the length of a set of layers and then exits the core, which leaves that set of layers empty. To avoid having empty layers in a fraction of the exchanger, a second stream can be diverted from another set of layers to occupy the empty region. This secon... |
Problem Statement: How can I do “milk run” modeling in PSCP? | Solution: In PSCP, “Milk Run resembles the delivery route of a milkman who loads his wagon completely and then drops off deliveries along a fixed route. It is used to model barging services and assumes limited number of barging vessels, which includes time for vessel to return to starting node. Travel times are defined... |
Problem Statement: How to use the Indexed Viscosity method in Aspen HYSYS | Solution: For certain fluid packages Aspen HYSYS provides different options of Viscosity method
Note: To choose the Indexed Viscosity method the user can drop the list of the Indexed Viscosity option
Aspen HYSYS uses the following methodology to calculate the kinematic viscosity (cSt) of the stream:
1. Calculates the ... |
Problem Statement: Is the Safety Analysis ‘Chemical Reaction’ scenario capable of sizing a PSV to protect a system against undesired runaway reactions? | Solution: We do not have any direct support for runaway reaction calculations inside the Safety Analysis environment. The ‘Chemical Reaction’ scenario type in the Safety Analysis environment serves as documentation only. The user will have to provide a relief stream and required relief rate, and then Safety Analysis w... |
Problem Statement: How to resolve when in Aspen Petroleum Scheduler/Orion, on invoking an event's User Calc , you are unable to see the Template data ? | Solution: The screenshot shown in the above statement belongs to a User Calc for Crude Run known as Optimize, User Calcs are customized utilities usually deployed for automation of a task,
This issue of not being able to see the template/data in the User Calc window is due to Restriction set to the User Calc executable... |
Problem Statement: When registering a project from a previous version of Aspen OnLine in V10, if the project name contains a hyphen or other special character, the migration may fail with error [Microsoft][ODBC Text Driver] Syntax error in FROM clause. | Solution: Aspen OnLine uses Microsoft database technology, and certain special characters are not supported. AspenTech recommends only using alphanumeric characters for project names and beginning all project names with a letter.
Rename the project folder using only alphanumeric characters, then repeat the registration... |
Problem Statement: During FCC calibration, how to adjust sulfur content so that the the calculated H2S match the expected value? | Solution: When performing the FCC calibration in software, the option to specify wt% sulfur in coke is not available in Coke and Sulfur Balance and the default value is 5 wt% shown on the result of FCC calibration | Analysis | Mass Balance tab. So if user want the calculated H2S match the expected value, how to adjust ... |
Problem Statement: What is the suitable property package selection for GDU in Aspen HYSYS? | Solution: Basically, the interaction parameters for TEG and water in the PR property packages are based on data from the Union Carbide glycol handbook at 1 atm. Although the entire composition range was used in the fit, these Property Packages are more applicable to higher glycol
concentrations (glycol > 80 mass%) and ... |
Problem Statement: In Aspen Advisor/AORA While trying to launch a SQL Server based model, how to resolve the error message, ”Login failed for user ‘advisor3?
(Refer Screenshot for error details) | Solution: The Aspen Operations Reconciliation and Accounting System (Aspen Operations Accounting), formerly known as Aspen Advisor, performs plant performance analysis and yield accounting functions.
In Aspen Operations Accounting, a model of the processing plant is used to track material receipts, shipments, internal... |
Problem Statement: When there is a firewall between the Aspen InfoPlus.21 server and Aspen Process Explorer clients, certain ports need to be opened to allow communication (see also knowledge base article: How do I connect Aspen InfoPlus.21 client applications to an Aspen InfoPlus.21 server across a firewall?).
In so... | Solution: The reason for these symptoms is because the Aspen InfoPlus.21 server needs to make callbacks to the clients to support asynchronous requests. Because Aspen InfoPlus.21 is outside of the firewall, these callbacks fail. After a certain timeout, Aspen InfoPlus.21 will default to using synchronous communication... |
Problem Statement: Process for validating PIMS model during an upgrade | Solution: This article describes the process for upgrading the PIMS model to a higher version and validate the user's workflow after an upgrade.
General Description of the process:
Check Non-Default Model Settings
Make sure you have a list of Non-default model Settings, right click on Model Settings and select Print ... |
Problem Statement: Cases created in versions prior to V9 in which Saturate with Water extension was used instead of the “Stream Saturator” unit operation might have problems with the extension not being displayed on the flowsheet, although it might still resolve saturation streams. | Solution: Since V10, we no longer deliver Saturate with Water extension with HYSYS. The best option is to replace this old extension with the new Saturator unit operation: delete the extensions and add the new Stream Saturator.
You can find more information about the new unit operation in KB How to specify the relativ... |
Problem Statement: Can a user monitor the PID controller variables response in Aspen HYSYS Dynamics? | Solution: The response of the Process Variables (PV), Setpoint (SP), and Output (OP) can be seen on the Monitor tab of the controller. The behavior of process variables can be monitored in a graphical format while calculations are proceeding.
The Monitor tab displays the PV, SP, and Op values in their relevant units v... |
Problem Statement: What are the changes in dock scheduling in V11 compared to the previous versions? | Solution: A Dock Scheduling license is now only checked out if a user opens a DS screen. Previously a license would be checked out if voyage data is found in the model irrespective of DS usage. Use the Integration | Voyages command to add, update and delete voyages. The DSIMPORT_VOYAGES and DSIMPORT_CARGOS staging ta... |
Problem Statement: How do I resolve an Unexpected exception: object reference not set to an instance of an object error? This error may occur from the File | Print menu. | Solution: Go to File | Export Case
Select .mdb | .xls | .xml format
Click Browse
Change the Save as type to .xml
Choose a location and provide a File name
Click Save
Click Next (do not check the Clear all existing data before export button)
Click Next through the remaining Export Wizard forms to accept the default sele... |
Problem Statement: How to use Advanced Analytical data in Molecular Characterization? | Solution: This document provides instruction on how to use advanced analytical data in molecular characterization as part of Aspen Assay Management features.
User can prepare the analytical data from a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR MS) or a Gas Chromatograph – Time-of-Flight Mass ... |
Problem Statement: What are the lists of pure component databanks in Aspen Plus? | Solution: Databank Contents Uses
PURE35 Data from the Design Institute for Physical Property Data (DIPPR) and AspenTech Primary component databank in Aspen Plus
AQUEOUS Pure component parameters for ionic and molecular species in aqueousSolution Simulations containing electrolytes
SOLIDS Pure component parameters for s... |
Problem Statement: As below shown, for one Scenario, ignore the source 22-BDV001 and 22-BDV002, these sources automatically are considered as Zero Flow source, but why also has vapor fraction indicated after run? | Solution: This is because it is checked this option: Calculate ignored sources with zero flow.
1, If selected, sources that have been ignored to be treated as if they have a zero flow, this will result in the back pressure being calculated and limit checked against the source MABP even if the source has been ignored. ... |
Problem Statement: How to resolve the problem that Variable change in Excel are not displayed in Aspen Plus? | Solution: This can occur for one of two reasons:
If you put an equation in a cell, the equation will take priority over any attempt to enter a new value on the form in Aspen Plus.
ASW expects you to change specified variables from Excel.
To fix, close the form/dialog box in Aspen Plus; then, open it back up; you will n... |
Problem Statement: When I export a split plate-and-frame economizer, APEA assigns a utility after the mapping procedure. How do I remove the utility and connect the appropriate process stream instead? | Solution: The first step is export the simulator data using the Send to APEA button.
Map either the hot or cold side to a plate-and-frame heat exchanger. Note, it is not necessary to map both sides.
Go to View | Process Flow Diagram.
After the PFD loads, right-click the inlet utility stream and select Delete. Repe... |
Problem Statement: I am getting an error while using the AFR V10 converter. When I click on the Load Data button on the converter an error message comes up saying COM class factory for component with CLSID {00021A20-0000-0000-C000-000000000046} failed due to the following error: 800702e4 The requested operation require... | Solution: This issue with the converter not working might be based on a permissions issue that is seen commonly on Windows7/Server 2008. The likely issue is permissions restriction through the User Account Control (UAC). The workaround is to run the Converter as an Administrator on the machine that is experiencing this... |
Problem Statement: Can I use the available icons of unit operations in Aspen Plus for models I built in Aspen Custom Modeler (ACM)? | Solution: If you want to use the icon of a unit operation model in Aspen Plus for your ACM model, you can attach the ‘Dynamics’ library to your ACM simulation file and then copy the icon you want to use from the ‘Dynamics’ library models and paste it on the ACM model folder.
1) Attach the ‘Dynamics’ library to your AC... |
Problem Statement: How can you view the list of controllers in the simulation when using Aspen HYSYS Dynamics? | Solution: The list of all the controllers installed in the simulation are summarized in the Control Manager. This can be accessed from the Dynamics ribbon tab, in the Tools group.
The controllers are grouped as PID, MPC, DMC, Ratio and Split controllers by individual tab. The user can change the controller mode (Off, ... |
Problem Statement: Is it possible to print a plot directly from a stream analysis in Aspen HYSYS? For example, the Dew point and Bubble Point curve from the Envelope Utility? | Solution: Utility plots are not accessible through report manager data sheets. To print a plot from one of the utilities in Aspen HYSYS, open the stream analysis and select Print Plot after right clicking on the plot area.
Keywords: print, plots, chart, graph
References: None |
Problem Statement: I observe Aspen Petroleum Scheduler crashing, what should be checked? | Solution: When APS is crashing some of the following options could be involved, please try the following suggestions and if that does not solves the issue create a dump file following the instructions in KB Article How do I collect a crash dump for aspenONE Engineering Products? That can be found in this link https://... |
Problem Statement: Why regressed reaction parameter is out of bound while regression converges? | Solution: The reason is that, In Data Fit, the regressed reaction parameters unit is same as the Global unitset of the simulation case.
For example, here the range and unit of activation energy is 20-30 and Kcal/mol, respectively.
However, when the regression is converged, the value of regressed activation energy is 4... |
Problem Statement: How to link a user subroutine dll file into Aspen Plus file? | Solution: Please follow the steps to connect a dll file into Aspen Plus file:
Please create a note pad file with a “.opt” extension. In the note pad file, please paste the link of the dll file location. Here in the screenshot the dll file and note pad file is in the same folder named “User routine Link”
Then open th... |
Problem Statement: How do I Modify the Aspen Online (AOL) Engine Execution Cycle for an Aspen Plus Equation Oriented (EO) Project? | Solution: The cycle time for the Aspen Online engine is the time between 2 model execution cycles. Once the Aspen Online evaluates that the plant is steady, the AOL engine will begin the model execution.
Users can control the duration between each model execution cycle thereby controlling how frequently the optimizer ... |
Problem Statement: Why does the Vapor Percent level is shown as 100% for Vessel Holdup calculations? | Solution: Vapor percent level is like a level gauge measurement. Each phase percentage level is estimated as the level from the bottom of the vessel.
So if there is vapor, it will be 100%.
Keywords: Vessel, Dynamics, Holdup, Percent Level
References: None |
Problem Statement: How to run a case study in Aspen HYSYS | Solution: 1. In the Home tab, select the Case Studies option and click on Add
2. In the Variable Selection Tab, add the independent and dependent variables by clicking the respective Find Variables option to open the variable navigator. You can also drag and drop the desired variables from any HYSYS stream or unit ope... |
Problem Statement: How To: See the Aspen OnLine (AOL) Simulator Model run from the GUI instead of Simulator Engine using AOL Interactive Service | Solution: The Aspen OnLine Windows service executes the simulator model from the simulator engine and therefore runs the model in the background. If the model fails to run, users can set Aspen OnLine to run the model interactively from the GUI by using the Aspen OnLine Interactive Service. This can be used as a trouble... |
Problem Statement: The Submodel Calculator (SMC) allows you to simulate one or more Aspen PIMS submodels independently of the rest of the model. After specifying the necessary variables and the properties to square the resulting matrix, it will calculate the rest of the variables and report total activities.
Common app... | Solution: Attached is an Excel File configured to run SMCthrough VBA automation. The input SMC file is called SKHT.smc and is a representation of the Aspen PIMS Volume Sample model SKHT unit.
Note 1: The VB Code is in Module1. Use Alt-F11 to go directly to the VBA macro editor to review it or edit it.
Note 2: Experie... |
Problem Statement: Why do some values in my datasheet/report have an asterisk next to them? | Solution: The asterisk indicates that the value is user specified, rather than calculated by HYSYS. (In HYSYS these numbers show blue rather than black). To turn off this feature press the Format/Layout button on the Report Manager window (if printing a report) or Select Datablock window (if printing a single datasheet... |
Problem Statement: Automation GetOrionDataCache fails after selecting option Export Blends in Menu Simulate| Publish | Export Blend | Solution: Automation GetOrionDataCache fails after selecting option Export Blends in Menu Simulate| Publish | Export Blend
This is by design. Export Blends is related with blends only. We are doing a simulation with blend event time periods only and are not taking other time periods into account. Hence GetOrionDataCac... |
Problem Statement: How do I add new attributes on a datasheet? | Solution: To add a new attribute on a datasheet:
1. Open the Datasheet Definer, connect to a workspace and open the datasheet you want to add an attribute in (e.g., 'AZ Shell and Tube Heat Exchanger').
2. Click on the Datasheet button and go to the Class Views tab to check the Object Class View name (e.g., ‘PIP VED... |
Problem Statement: What are the color coding represent in the spreadsheet in Aspen Plus? | Solution: Below are the color coding representation in the spreadsheet:
Italic blue values are default values in input fields where you have not entered a value
Bold blue values are values you have specified
A bright blue outline indicates the field you are currently editing
Black values are results or non-edit... |
Problem Statement: How do I export column hydraulics results to KG-Tower? | Solution: First, please make sure that both Aspen HYSYS and KG-Tower are installed on the same computer.
In Aspen HYSYS V8.8 and older versions, the ‘Tray Sizing’ utility is available to perform design and rating calculations for trayed / packed columns. All you need to do is to click on the Tray Sizing | Export | Exp... |
Problem Statement: Is there an example of a script to retrieve stream’s properties for an equipment using the Query Editor in Explorer? | Solution: The attached file contains an example script which can be used in the Query Editor in Explorer to retrieve mass flowrate.
The starting point to test the script is to put a Process Vessel on a PFD, connect two streams and give each stream a total mass flowrate (e.g. via a mass balance insert). This script con... |
Problem Statement: How do I create a continuous equipment list in ABE? | Solution: Continuous Equipment Lists are similar to Summary Sheets, but they list the information for all class members in a continuous list on a single page, instead of generating additional pages to contain all the related information.
1. Open the Datasheet Definer aplication and connect to a workspace. Create a new... |
Problem Statement: What is the difference between the two options for Characterizing Assay? | Solution: The Characterize button has two options for conventional characterization for input assays:
Match Assay Cut Properties which is the the Default option, will use all the available data during the characterization, but properties of product cuts are matched most closely. This implies that whole crude propertie... |
Problem Statement: How Eventscoll Automation codes are used with Pipeline Events | Solution: You can use Orion.Eventscoll object to expose different methods, this methods can be applied to different types of evets, for example, Pipeline Events. You can find attached a workbook with the following automation examples:
Create PL Crude Receipt
Create PL Crude Shipments
Create PL Product Shipment
Keyword... |
Problem Statement: In Aspen Petroleum Scheduler and Aspen Multi-Blend Optimizer, how to define different categories to group User Tools, how can I reassign a Tool to a different category and how to rename a category? | Solution: This Tech Tip provides a description on how to define different categories to group User Tools, how to reassign a User Tool to a new category and how to rename a category.
For this example, we will use the demo model located in C:\Users\Public\Documents\AspenTech\Aspen Petroleum Scheduler\Demo\Access
The ne... |
Problem Statement: What is the effect of the submerged surface area on the heat transfer coefficient for a shell side condenser? | Solution: First, we should review the impact of the submerged surface area on heat transfer. Upon increasing the submerged surface area, the vapor mass flux increases (most of the times only slightly) due to a reduction in the vapor phase flow area. However, the result of this change in the vapor mass flux on the overa... |
Problem Statement: How to reload simulator and simulate all in APS V11 and other versions? | Solution: First, log into your APS model. Make sure that you have already done DB update before you attempt to open the db. If not, please refer to KB article 1548.
Make sure to point to the correct folders for: dlls, smcs, ubml, and Units.xls. Or otherwise the simulation will run into errors.
Check model settings or... |
Problem Statement: How to run database upgrade script against your SQL server database APS/MBO model? | Solution: This is a continuation of KB article 1548. You need to perform DB update first for your SQL server model. This article is a detailed explanation for step 7 in that article.
First, restore the SQL database by following detailed steps in another KB article “How to restore SQL server database for an APS/MBO mod... |
Problem Statement: What are the general steps to check if event reconciliation is the same in V11 compared to old versions? | Solution: Petroleum Scheduler calculates the difference between the simulated and the measured tank volume at the end of reconciliation period. If this difference exceeds either the absolute or the relative limit, the trend of the tank volume will be highlighted. The measured and simulated tank volume may differ signif... |
Problem Statement: When I include overtime in the general rates, it adds extra hours and dollars.
When I manually input overtime as a library item, it adds the dollars in.
If overtime is input in the general rates, would it be double-dipping by putting in extra hours and dollars? Or is Icarus simply showing what the e... | Solution: When you include overtime in the general rates, it adds extra dollars and labor hours by design. When you input overtime as a library item, only dollars are added.
Therefore, if you input overtime in both general rates and as a library item, it is not double-dipping as the Icarus cost engine does not take int... |
Problem Statement: How to verify Aspen PIMS has been successfully installed? | Solution: This Tech Tip provides a description of the check points to review and ensure that Aspen PIMS was installed successfully.
Open PIMS, from Start Menu in your computer Open PIMS
Open a PIMS Model
a. PIMS AO Sample Model Once PIMS is opened, go to Menu Model| Open…, then select a DR Sample Model. browse t... |
Problem Statement: When registering a project from a previous version of Aspen OnLine in V10, if the project name contains a hyphen or other special character, the migration may fail with error [Microsoft][ODBC Text Driver] Syntax error in FROM clause. | Solution: Aspen OnLine uses Microsoft database technology, and certain special characters are not supported. AspenTech recommends only using alphanumeric characters for project names and beginning all project names with a letter.
Rename the project folder using only alphanumeric characters, then repeat the registration... |
Problem Statement: Why is the API[Petrol] giving different results compared with the API density reported in the stream properties? How is API[Petrol] calculated? | Solution: Mass density may be displayed in API units (please refer toSolution 116594), but the value reported will not match with the API[Petrol] value. The [Petrol] designation indicates that the property is calculated using Aspen HYSYS Petroleum Refining. The reason the two representations of API gravity are not the ... |
Problem Statement: How can add / attach libraries to Aspen Custom Modeler (ACM)? | Solution: Libraries can be attached to ACM on two different levels:
1) Local Level: On the Simulation Explorer, left-click on the ‘Libraries’ folder. Next double-click on the ‘Open Library’ icon (on the ‘Contents of Libraries’ pane). Now browse to the location where the ACM library (*.acml file) is located and click o... |
Problem Statement: How can I set up the Windows compatibility mode of the ABE applications? | Solution: Users may set up the Windows compatibility mode of all ABE applications to run for, which is not mandatory but might turn out to be convenient to avoid that problems arise when attempting to use, for example, the ABE Excel-based applications (e.g., Excel Datasheet Editor).
To do so, go to: C:\ProgramFiles\As... |
Problem Statement: After migrating to a newer version, or run the same model on a different machine, how do we transfer the Gantt chart preferences in an event screen of an APS/MBO model from the old machine to the new one? | Solution: Unfortunately, the Gantt Chart preferences settings are not stored in any of the APS/MBO database tables. It is stored in the machine’s registry. Basically, the user needs to export the registry settings of the Gantt Chart section of the old machine and import to the new machine. Let’s look at how this could ... |
Problem Statement: Are there any guidelines for converting an Aspen HYSYS case from steady state to dynamics? | Solution: Pressure/flow stream specifications are made on the Specs page of the Dynamics tab of any material stream. Dynamic specifications for unit operations are also generally found on the Dynamics tab of the unit operation property view. The following table contains some rules that will help guarantee a consisten... |
Problem Statement: Can I connect my Aspen Plus model to ASW if they are from different versions? | Solution: You can have different versions of ASW and Aspen Plus installed on your machine and still connect your process model to ASW.
For example, if you have the ASW V9.0 add-in installed and activated on your machine, and Aspen Plus V10 installed as well, you can still have ASW V9.0 connect to your Aspen Plus V10 mo... |
Problem Statement: How to Use DMCplus Model to Create the SmartStep Seed Model? | Solution: Files in this KB are the built-in files that come with DMCPlus installation.
The following dataset is used for illustration purposes and is not based on real plant data.
Use DMCplus to create a model with first order curves for these relationships.
1) Open HGP-SeedStep1.dpp.
2) In the model’s folder you will... |
Problem Statement: What is the procedure of creating custom calculations using Aspen Watch Maker? | Solution: 1) Launch Aspen Watch Maker via either the link pinned to the Start menu or Start | Programs | AspenTech | Aspen Manufacturing Suite | APC Performance Monitor | Aspen Watch Maker.
2) Select Tools | Tag Maintenance… to bring up the Tag Maintenance window.
3) Add Tag button to add the Aspen Watch Tags using the... |
Problem Statement: How can we change the working folder when ACM models are stored on a drive with no write privileges? | Solution: 1 - Start up the Windows registry editor. To do this go to the Windows START button, click on RUN and then type REGEDIT in the dialogue text box.
2 - Once the registry window opens, find the registry key:
Computer\HKEY_CURRENT_USER\Software\AspenTech\Aspen Custom Modeler\36.0\Simulation
3 - Change the value... |
Problem Statement: How to add a User Tool/ Interface in APS for ease of access of the Scheduler? | Solution: In APS , the Scheduler needs to sometimes refer external applications like a calculator/report/any other custom utility.
In order to do this, the Modeller/ Administrator can assist in adding this Tool in APS.
In the APS GUI, on the left hand side there is a navigation pane , in the navigation pane, there is... |
Problem Statement: Where can I find CPDIEC Fluid package? | Solution: You could find the CPDIEC in Fluid package form by clicking on Edit Properties edit as
in the below snapshot.
1
Please note that only Electrolyte NTRL fluid package from Aspen Properties could be
used in Hysys to get elements of CPDIEC.
In order to see the FP Electrolyte NTRL, you will need to add the compo... |
Problem Statement: How do I insert rows and columns in the Aspen HYSYS spreadsheet? | Solution: To insert a Row/Column in spreadsheet click on the Edit Rows/Columns on the Spreadsheet tab.
Keywords: Insert, row, column, spreadsheet
References: None |
Problem Statement: I have multiple versions of Aspen Process Economic Analyzer (APEA) loaded on my machine and I want to link a particular version of APEA with Aspen HYSYS. How can I use Aspen HYSYS to load a preferred version of APEA?. | Solution: You have to unregister the version of APEA that you do not want to use and re-register the version you want to open when you link from the HYSYS interface.
If you have both versions 9.0 and 10.0 of APEA on your machine, and you want to link to v10.0 and do not want to link v9.0 of APEA, you have to unregister... |
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