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Problem Statement: How to perform a Fire scenario with the Pres Relief analysis | Solution: Aspen Plus allows to model dynamically vessels undergoing pressure relief due to a fire or heat input specified by the user. To perform a Fire scenario with the Pres Relief analysis, please follow these steps:
1-Under the Flowsheeting Options, select Pres Relief and click in new.
2- In the Setup ribbon, se... |
Problem Statement: My license no longer matches my license locking information, what should I do? | Solution: If you notice that your locking information for your network or standalone license does not match then you will need to request for the license to be changed.
This knowledge base article can be used to request a re-host as well.
Please Note: Customer Care will double check that the license is not being used o... |
Problem Statement: It is tedious to delete multiple events from the RAM Data Environment. Is there a quick way to delete multiple events at a time? | Solution: Starting from V10 CP6, a Delete Selected button has been added to the RAM Data environment | Events tab. The Delete Selected button allows you to delete multiple events by selecting multiple events in the RAM Data environment and clicking the Delete Selected button. Remember, events can only be deleted from t... |
Problem Statement: How to create a live link of Cv value of one valve with Cv value of another valve? | Solution: In HYSYS, users can check the "Use sizing methods to calculate Delta P" check box to calculate either the Delta P or Mass Flow. Delta P or Mass Flow rate depends on the Valve Opening, C1, Cv or K, and Valve Operating Characteristics.
When modeling multiple pipe segments that may handle different feed throug... |
Problem Statement: How to display different transport properties per stage in a column? | Solution: Aspen HYSYS allow the user to review profiles, transport properties or composition per stage in a column. To display different transport properties, please follow these steps:
1. In the column Performance Tab, select Plots and choose the desired tray by tray properties option you want to track
2. Click in "... |
Problem Statement: What does the Aspen Fidelis Reliability Submodel file contain? | Solution: The submodel file feature was introduced in V10 CP5. The submodel file is a text file which represents the utilized capacity and the culpability of the sensitivity basis unit. The text file is divided into three fields:
Lists run parameter information, the sensitivity basis unit information, and the name of... |
Problem Statement: How can we visually identify pipes having different service/product/flow etc.? | Solution: Starting from V10 CP6, you can change the color of pipe elements to increase visibility and enhance understanding of the Aspen Fidelis Reliability model. You can select pipe colors based on different pipe flow/service/ product etc. To change the pipe's color, either use the Pipe Color input field in the Pipe ... |
Problem Statement: How does EDR calculate latent heat when this property is not user input and fluid composition is not specified? | Solution: In situations where fluid properties have been manually input into EDR, but fluid composition and latent heat have not been input, EDR can estimate latent heat as follows:
Keywords: None
References: None |
Problem Statement: The fields in the RAM environment are too small. Is there a way, I can zoom in/ magnify? | Solution: Starting from V10 CP6, you can now use the zoom functionality in the RAM Data environment. The View tab is not available for the RAM Data environment. You have two other options of using the zoom functions.
Use the Zoom slider bar on the bottom-right of the Aspen Fidelis Reliability application.
If you are wo... |
Problem Statement: What is a submodel in AFR and how do I create one? | Solution: A submodel in Aspen Fidelis Reliability represents an envelope model with the ability to assimilate systems with varying interactions to fully model an operation. The ability to break apart large mutli-system models by creating envelope models reduces simulation time and allows you to have a better understand... |
Problem Statement: This article explains the steps to complete the Calibration Wizard when using Distillation-based separation in PIMS Aspen Assay Management. | Solution: This feature allows you to calibrate the fractionation model using distillation curve data obtained for the products of a distillation tower in actual operations (aka test-run data). The resulting SI factors can then be used directly to recut crudes and update PIMS assay tables.
Complete the Fractionation Mo... |
Problem Statement: Is it possible to define different source conditions for each scenario? For example, the allowable back pressure for certain relief valves in one scenario. | Solution: In Aspen Flare System Analyzer the geometry and configuration network are fixed for all the scenarios as mentioned in the article (Is it possible to ignore a pipe in one scenario, but allow it in other scenarios?) but source conditions can be adjusted as needed.
As show in the following image, the inputs tha... |
Problem Statement: Why the ‘% of Target’ for one of my utilities is reported as ‘INF’ on the Summary Page? | Solution: The Summary page displays the percentage values relative to the target value. In this case, the ‘INF’ stands for ‘infinity’; This just means the utility target is 0, which is possible depending on process stream data.
Keywords: INF, Utility Target, % of Target.
References: None |
Problem Statement: Does the control valve handle critical flow in Aspen HYSYS Dynamics? | Solution: The valve model in Aspen HYSYS handles critical flow in dynamic mode. This information is available in the Flow Limits page under the Dynamics tab as shown below.
Note that for vapour flows, choking is handled automatically. For liquid flow, the option has to be enabled. You can also enable the liquid choking... |
Problem Statement: How can I estimate properties not reported for solid inorganic salts? | Solution: To achieve this, you can use the Mostafa method. The Mostafa method is a group contribution method for estimating solid standard Gibbs free energy of formation (DGSFRM) and solid standard enthalpy of formation (DHSFRM), along with parameters for the solid heat capacity correlation (CPSPO1).
This method is ap... |
Problem Statement: What is the difference between heat exchanger model in Aspen HYSYS? | Solution: Below is the difference between heat exchanger models:
Rigorous Shell&Tube:
Incorporates Aspen EDR software for mode detailed calculations.
Simple End Point:
- UA method.
- Temperature difference based on LMTD.
- No phase change applications.
Simple Steady State Rating:
Rating calculation... |
Problem Statement: What are the recommended property packages for solubility of gas in water in a hydrocarbon system? | Solution: Peng Robinson is generally recommended as the property package of choice in Aspen HYSYS for any hydrocarbon system. However, in some cases the PR equation can consider the water solubility of Hydrocarbons to be a little low.
If hydrocarbon solubility in the aqueous phase is important, then the user can use th... |
Problem Statement: What exactly does every file in the Offline folder do? | Solution:
When working with AOL projects the Offline folder is generated inside the AOL Project folder. This Offline folder contains a number of different files. We are going to define each one and explain their usage for the AOL project:
First off, bkp/apw, appdf, inp as well as any supporting files (cfg, dll, etc.) ... |
Problem Statement: In EDR simulation, the TEMA sheet result of the outlet stream does not agree with the temperature specification in the process data. I got the following note 1925 in Warning & Messages:
How could I mitigate it? | Solution: The reason why the TMEA sheet results do not match the temperature specified, is because whenever the program detects that there is 2-phase flow, the program solves the energy balance and pressure drop calculations simultaneously. The temperature reported in TEMA is that corresponding to the real outlet press... |
Problem Statement: When simulating a heat exchanger, I need to input Oil SAE 20, with ISO Viscosity Grade 46cSt@40°C. However, I cannot find it in any of EDR’s physical property package databank. In B-JAC I can only find Oil SAE 10, 30 and 40. | Solution: ISO VG Oils are proprietary machine oils and AspenTech does not have access to their detailed thermodynamics data. Also, the relevant properties provided by different suppliers could be slightly different. You could approach your vendor for those information or search on the internet to see if such data packa... |
Problem Statement: After you run a script on your simulation, you might be interested in checking the value of a given variable of interest in the message box. This article
shows which command to use in order to accomplish that. | Solution: Let’s say you’d like to print a message for the pressure of a separator block called “FLASH”. Here is an example of the syntax for you to use on your script:
application.msg "Pressure is " & BLOCKS("FLASH").P.value &”bar”
which results in a message on the Simulation Messages window, as shown below:
... |
Problem Statement: Plant Data throws connection error when connection to Domain is broken | Solution:
When the IP address of a machine changes while Plant Data in Aspen HYSYS or Aspen Plus is running, Plant Data will throw a connection error such as “No connection could be made because the Target machine actively refused it”. For example, if a laptop that is running Plant Data is remotely connected to your o... |
Problem Statement: How to set the Cetane Number as a column spec? | Solution: In Aspen HYSYS is possible to report the Cetane Number and Cetane Number D4737 (What is the difference between Cetane Number and Cetane Number D4737?) and like the TBP, the cetane number or index can be used as a column spec.
To set the Cetane number as a column spec follow these steps:
1. In the Design Tab... |
Problem Statement: Rule RPBCOL returns UNKNOWN for coloring scheme in PBACLRS that is not standard. | Solution: In V10, for custom coloring schemes in PBACLRS you need to create a new rule with appropriate predicate.
Create a rule with the predicate: ASSIGN_IND_BASED_ACTIVITY_COLORS_FOR custom scheme
Note: This rule must populate the COL column of the MAKI table to color activities according to your new color scheme.
K... |
Problem Statement: Which pressure is used if you specify both the atmospheric pressure and system back pressure in Aspen Flare System Analyzer? | Solution: In Aspen Flare System Analyzer the user can specify the Atmospheric pressure from the General tab in the Calculation Settings page.
The user can also set the System back pressure in the scenario editor. System back pressure refers to the static pressure at the outlet of the flare tip.
The System back press... |
Problem Statement: How do I access the Safety Analysis results if the Documentation Builder isn't loading properly? | Solution: The safety environment saves almost all of its information in an mdb file (Microsoft Access Database) with the same name as the case file (for instance, if the case file is named Example.hsc, then the database will be named Example.mdb). Therefore, it is extremely important to keep the Access database in sync... |
Problem Statement: Error "Could not get add-in BatchPlus 36.0 EquipmentDiagrams" when trying to generate Equipment Diagram Results.
When attempting to generate equipment drawings from Aspen Batch Process Developer using Microsoft Visio, ABPD fails to find Visio even when it is installed.
Attempting to manually instal... | Solution: User will encounter this issue when BatchPlus Equipment Diagrams addins is not full registered with Microsoft Visio.
Copy below listed files from “C:\Program Files (x86)\AspenTech\Aspen Batch Process Developer V10.0\bin” directory to “C:\Program Files (x86)\Microsoft Office\Office15”
Try to generate an Equipm... |
Problem Statement: When trying to generate a data file report to create a custom databank, DFMS file does not get created by Aspen Plus | Solution: As part of the workflow for creating a custom database in Aspen Properties Database Manager, the correct data structure can be generated as report from the Aspen Plus Properties Parameters and exported to an Aspen Plus DFMS report file which has a *.dfm file extension.
If there are any Proprietary databank... |
Problem Statement: This knowledge base article describes the table data formats used in Aspen SCM. | Solution: SCM table data can be one of several formats. Table data formats consist of a letter followed by a number. The letter indicates the type of data. The number indicates the number and format of digits.
Character (C) Format:
Each entry in a Character table consists of 1 to 64 alphanumeric characters
Default: C8
... |
Problem Statement: Is there a limit on tube count in the radiant box of a Fired Heater in Aspen HYSYS? | Solution: Yes, there is a limit on tube count in the radiant box of a Fired Heater in Aspen HYSYS. Currently, the limit is set to 50.
However, the limit of tube counts will be increased in next version release.
Keywords: Tube Count, Radiant Section, Fired Heater
References: None |
Problem Statement: Why the ‘% of Target’ for one of my utilities is reported as ‘INF’ on the Summary Page? | Solution: The Summary page displays the percentage values relative to the target value. In this case, the ‘INF’ stands for ‘infinity’; This just means the utility target is 0, which is possible depending on process stream data.
Keywords: INF, Utility Target, % of Target.
References: None |
Problem Statement: This knowledge base article describes the MAKF table columns that is filled by simulator in Aspen Plant Scheduler. | Solution: The MAKF table (IND x HKF) contains Floating Point information about each activity in the schedule.
Descriptions of MAKF Columns
Following is a description of MAKF columns.
LS
(Required) Specifies the Lot Size- the amount of the product produced by the operation.
PT
(Required) Specifies the Process Time- dura... |
Problem Statement: How to install the Oil Manager blend in a stream located in a Sub-Flowsheet | Solution: To install an oil manager blend into a stream located in a Sub-Flowsheet, follow next steps:
Crete a new Sub-Flowsheet in the Simulation Environment (or use an existing one)
Now the Sub-Flowsheet has to be associated with Oil Manager. Go to Properties environment | Fluid Package and click "Associate Fluid Pa... |
Problem Statement: In some cases, the default working directory for Aspen Plus Dynamics might not be available to you. This KB articles explains how to change the working directory to another location. | Solution: The working folder is used to store temporary files created when you run a simulation. By default, the working folder AM_filename is created in the same location as the simulation files. To change the default working folder, please follow the steps below:
Note: changing the working folder closes any open sim... |
Problem Statement: When simulating a heat exchanger, I need to input Oil SAE 20, with ISO Viscosity Grade 46cSt@40°C. However, I cannot find it in any of EDR’s physical property package databank. In B-JAC I can only find Oil SAE 10, 30 and 40. | Solution: ISO VG Oils are proprietary machine oils and AspenTech does not have access to their detailed thermodynamics data. Also, the relevant properties provided by different suppliers could be slightly different. You could approach your vendor for those information or search on the internet to see if such data packa... |
Problem Statement: Based on the stream inlet temperature (dry bulb temperature) and the relative humidity (RH) of the Stream Saturator, how does Aspen HYSYS calculate the Wet Bulb Temperature? | Solution: Aspen HYSYS first estimates the water composition of outlet fluid at RH% saturation using the user input – feed condition, RH and Dry bulb temperature (DBT).
For WBT calculation: “Dry fluid” composition is estimated by removing the water composition from the feed stream and then it is flashed at reference T ... |
Problem Statement: This knowledge base article describes how to classify inventory to generate a feasible schedule, | Solution: TYI:
TYI set contains all the types used for classifying inventory
This set would have been nulled out during the Data Initialization process
Based on the materials and the lines in the model, TYI needs to be filled up.
Some of the standard inventory types used in all models needs to be appended to TYI are:
A... |
Problem Statement: What are the supported amine solvents in Acid Gas - Liquid Treating property package in V10? | Solution: Supported Amines
MEA
DEA
MDEA
DGA
MDEA + PZ
Keywords: Liquid Treating
References: None |
Problem Statement: When starting Aspen Batch Modeler v8.4 Distillation you get a message saying Unable to load DLL 'attpsr.dll' "The network path was not found. This error is only for Aspen Batch Modeler v8.4 and no other version.
With Aspen Batch Distillation v7.3, you could get a similar message saying Unable to... | Solution: The errors are very different but we describe both in the same document as customers searching for the error could find the incorrect one...
Aspen Batch Modeler v8.4 only
For v8.4, the reason is that Aspen Batch Modeler v8.4 may be used with Aspen Properties v8.4 or Aspen Properties v8.6. When you install ... |
Problem Statement: How do I find the build number of Aspen HYSYS? | Solution: Sometimes because of version compatibility users need to know which build number they're using. To do so please open Aspen HYSYS and go to File | About and check the last four numbers inside the parenthesis.
In this example, for Aspen HYSYS V10 the build number is 36.01.250.
Here some more examples of As... |
Problem Statement: This knowledge base article describes the columns in MAKI table that is populated by simulator. | Solution: The MAKI table (IND x HKI) contains Integer (index) information about each activity in the schedule. This table is populated by the Simulator (M SIM).
Descriptions of MAKI Columns:
Following is a description of MAKI columns.
LEV
(Required) Specifies the hierarchy (HIER) level assigned to the activity by the... |
Problem Statement: How to fix a license commuted error code 75?
Successfully commuted the Aspen Plus license key, opened Aspen Plus, and then SLM Commute error 75 occurred. | Solution: The SLM Client Commuter registry is corrupted and a clean file is required to remove the error code 75. Please follow the 3 steps to receive your clean file from AspenTech Technical Support Team.
1. Please login and submit a case at the https://esupport.aspentech.com/apex/S_Homepage.
2. Provide the ... |
Problem Statement: Why if the Sulfur Content of my assay is set as zero I still see a value reported in the stream properties? | Solution: Aspen HYSYS doesn't distinguish between organic sulfur and inorganic sulfur, it just has a sulfur property and if your stream composition has H2S, you are expected to see the sulfur content in the stream properties. If you want to see the sulfur content without the effects of H2S, you either need to remove th... |
Problem Statement: How does Aspen Plus calculate the Diffusion Coefficient? Is possible to report it? | Solution: The Aspen Physical Property System has seven built-in diffusivity models:
Model Type
Chapman-Enskog-Wilke-Lee (Binary) Low pressure vapor
Chapman-Enskog-Wilke-Lee (Mixture) Low pressure vapor
Dawson-Khoury-Kobayashi (Binary) Vapor
Dawson-Khoury-Kobayashi (Mixture) Vapor
Nernst-Hartley Electrolyte
Wilke-Chan... |
Problem Statement: The attached guide explains several common recommendations to set up the format of a Dynamics model. | Solution: This here is the most trivial information you will ever read on dynamic simulation, yet it is valuable information intended to make things a bit easier. The idea is to separate the trivial from the modelling problems, so you can better focus on the real work. Most of this should be done while still in steady-... |
Problem Statement: How are equivalent length of fittings calculated in Aspen Flare System Analyzer? | Solution: The fittings loss method in Flare System Analyzer uses two-K method. The equation used is
K = A + B * fT
Where
A
= constant, also known as VH (velocity head) factor
B
= constant, also known as FT factor
fT
= Darcy friction factor for fully turbulent flow (Re = 10^10)
f
= Darcy friction factor at... |
Problem Statement: When user design distillation column in HYSYS, program will input feed stream's vapor and liquid phase together into the designated stage (default).
It can cause high uncertainty for some distillation column which has 2-phase feed stream. | Solution: Some of feed stream are depressurized or heated for next distillation column.
Vacuum distillation unit is a good example for this operation. When the liquid stream from atmospheric distillation is fed into the vacuum distillation, it depressurize from atmospheric pressure to 2-4 psia which is almost 6-7 time... |
Problem Statement: How to fix Aspen Plus V10 "Error_while_checking_out_license_(SLM_RN_PML_PLS_BATCHMOD)?
***************************************************************************** * SORRY, LICENSE VALIDATION/CHECKOUT FAILURE FOR BatchProcess * * Server: "Error_while_checking_out_license_(SLM_RN_PML_PLS_BATCHMOD)" ... | Solution: First, verify that your current license does not include the license key by opening the License Profile. Please refer to this KB article #45955 on how to use the License Profiler.
Second, refer to KB article #22319 on how to submit a license upgrade request and priority. This is not a rehost license reques... |
Problem Statement: This knowledge base article describes set up time and cost for materials and the underlying structures that define them. | Solution: Setup time is the time consumed on transitioning from one operation to another.
Setup cost is the cost incurred on transitioning from one operation to another.
SGRP Table
The SGRP table (FAM x HTC) defines parallel and serial setup tasks. SGRP is an Integer table.
SGRP table defines whether the setup attribut... |
Problem Statement: What are the supported amine solvents in Acid Gas - Physical Solvents property package in V10? | Solution: Currently, only DEPG is supported amine solvents in Acid Gas - Physical Solvents property package.
Keywords: Physical Solvents, Acid Gas
References: None |
Problem Statement: What is the source of the Conduction terms (heat capacity, density and thermal conductivity) available in the Detailed Heat Flow model in the dynamics pipe segment? | Solution: The heat capacity, density and thermal conductivity values must depend on the pipe material.
The topic Pipe Segment Heat Model Page | Detailed Heat Loss Model | Conduction Option shows a table with some typical values for metals. However, you will notice the default values are based on a material that is ... |
Problem Statement: Role permissions defined in RBNAVMAP not respected for Sequence Builder related screens in Aspen Plant Scheduler. | Solution: RBCMG is the campaign manager role permissions configuration table and it repopulates RBNAVMWK in RRBTIER.
So, you need to also uncheck the appropriate rows there in RBCMG for the Role permissions to work.
Keywords: None
References: None |
Problem Statement: I am trying to design a heat exchanger with shells in series. However, the program is preventing me from specifying more than one shell in the design parameters. Why is this? | Solution: The issue relates to the shellside nozzle configuration. If separate nozzles for vapour / liquid outlets have been specified, you will not be able to design with shells in series. Changing the option to the screenshot below will resolve the issue
Keywords: ,
Shell in series, Shell side nozzles
References: No... |
Problem Statement: How can I convert a flowsheet into a template? Can I convert a subflowsheet into a template? | Solution: To save a simulation file as a template, instructions change depending on the HYSYS version:
For V7.0 to V7.3
Select Simulation | Main properties from the top level menu and click the Convert to Template button.
For V8.0 to V8.2
Click on the Convert to Template button located in the ribbon under the Home Tab
... |
Problem Statement: What are the supported amine solvents in Acid Gas - Chemical Solvents property package in V10? | Solution: Supported Amines
DEA
DGA
DIPA
MDEA
MEA
PZ
TEA
Supported Amine Blends
DEA+DGA DGA+DIPA DIPA+MDEA MDEA+MEA MEA+PZ PZ+TEA Sulfolane+DIPA
DEA+DIPA DGA+MDEA DIPA+MEA MDEA+PZ MEA+TEA Sulfolane+MDEA
DEA+MDEA DGA+MEA DIPA+PZ MDEA+TEA Sulfolane+MDEA+PZ
DEA+MEA DGA+PZ DIPA+TEA MDEA+MEA+DEA
DEA+PZ DGA+TEA ... |
Problem Statement: This knowledge base article describes the complete list of TDAT parameters in Aspen Plant Scheduler. | Solution:
ACCUMULATION FACTOR (AF):
The accumulation factor column controls on how inventories are carried over from one-time period to the next.
0 or Blank: No inventory is carried over from one-time period to the next
1: Inventory is carried over
Number between 0 and 1: Some inventory is lost during storage.
LOT SIZ... |
Problem Statement: Are binary interaction parameters (BIPs) estimated when using the Aspen HYSYS property methods HYSPR, HYSSRK, HYSGLYCO? | Solution: These models are primarily intended for supporting the use of Aspen Properties by Aspen HYSYS and usually, the HYSYS component databank contains data for its binary interaction parameters:
GLYABV: Glycol activity binary parameters
GLYKIJ: Glycol EOS binary parameter
HPRKIJ: HYSYS PR binary parameter
HSRKIJ: H... |
Problem Statement: How to use XLR Viewer to analyze and troubleshoot solutions in PIMS AO | Solution: PIMS-Advanced Optimization (PIMS-AO) provides a new tool since V7.3 to give the user the ability to analyze run results in a straightforward but extremely powerful environment. This tool, the XLR Viewer, is amazingly capable as a problem analysis tool. But it can also be used to provide the user with great in... |
Problem Statement: At what drive location to place any custom constraint file for Optimization? | Solution: The default location to place any custom optimization constraint file is: C:\ProgramData\AspenTech\Aspen Utilities Planner V10.0
If “Program Data” folder is not visible, please make it visible from Administrative mode.
From this location, both Aspen Utilities Planner Optimization and Excel Add-in Optimizer... |
Problem Statement: EDR does not open since updating to Solidworks 2018 | Solution: There have been reports where after updating to Solidworks 2018, EDR won’t work anymore and it will show a message saying that “Aspen EDR has encountered an error and will be closed” on every attempt to open the application, and poiting to a log file in a speficic location (usually C:\Users\[users]\AppData\Lo... |
Problem Statement: When performing a line sizing for a PSV in the Safety Analysis environment in Aspen Plus or Aspen HYSYS, you have the option to change the value for the pipe roughness. In some specific situations the value of roughness does not impact the calculated pressure drop for your line. | Solution: A portion of the pressure drop calculation involves the evaluation of the friction factor, which, in turn, strongly depends upon the type of relieving flow the system surpasses.
According to Moody’s Chart (1944) for friction factor (see picture below) for any given fluid undergoing laminar flow (~Re<10,000),... |
Problem Statement: What ports need to be open between Mtell Server, Client and MS SQL Server? | Solution: Only port 1433 is needed to be open between any Mtell server or client and the MS SQL Server machine.
Ports 4501-4510 are also used between the Mtell server and Mtell client machines if you plan to install the rich client applications on any end user machines. They will all need two-way TCP communication, wi... |
Problem Statement: A closed propane refrigeration solves in Sequential Modular mode but when switching to Equation Oriented mode it fails. | Solution: A closed loop flowsheet can not be modeled in EO the same way as it is modeled in SM. In SM the Aspen Hysys flowsheet does not require a recycle logical operation to converge at the Loop. The same model in EO mode will return several non-linearity errors due to the closed nature of the model. The solution is ... |
Problem Statement: Aspen Batch Modeler by default is not handling solid components in the component list, but sometimes batch processes include solid catalyst. How to include solid component as catalyst in Aspen Batch Modeler? | Solution: In Aspen Batch Modeler, in the Configuration folder| Reaction tab there is an option to select: "Solid catalyst present" and then one can include a mass of the solid catalyst and volume/density of the catalyst.
This option is considered for the scenario when the reaction occurs in the pot only.
There is no... |
Problem Statement: Sometimes we have parameters that fit a liquid pure component viscosity model only within a certain temperature range. Extrapolating the results provided by an equation to temperature values out of its valid range may incur in significant errors. To account for the deviations caused by this procedure... | Solution: The pure component viscosity model used in Aspen Plus is represented by the pure component parameter MULDIP-1.
To define a second set of parameters (MULDIP-2), follow the steps below:
1. After you have defined your components and property method, add a second method in the Properties Environment... |
Problem Statement: Upgrade of GML_V10.0.CAS library fails with an error message. | Solution: There is an known issue in Aspen SCM related to RLIBMGR ,COLLECT and LINK which can result in error while trying to upgrade GML_V10.0.CAS .
Please follow the below steps to resolve the error:
1. Open the model.
2. Copy RLIBMGR from the GML library by running the below command in the Command Window
COPY RLIBM... |
Problem Statement: How to model NAOH Heat of Dilution in Aspen Plus? | Solution: When using Aspen Plus to model the NAOH heat of dilution, users will use Electrolyte NRTL method and the old MNAOH insert file. The aim of MNAOH insert file is to add one more chemical equilibrium on top of the regular chemical equilibrium from Electrolyte Wizard.
Equilibrium NAOH + 2.... |
Problem Statement: This knowledge base article describes how to control the coloring schemes for activities on Planning Board. | Solution: PBACLRS set contains the list of coloring Schemes for activities on Planning Board. Description mentioned in this set is visible on the Format tab of the Planning Board Ribbon.
PBACCTL is the Control table for the Coloring Schemes.
PROIND - Should be filled with either PRO or IND, based on the coloring scheme... |
Problem Statement: In Aspen Plus, the user can write Fortran Expressions (How do you write Fortran expressions?, Aspen Plus V10 User Models Manual) but in some cases Aspen Plus can shows the following error: "Fortran error declaration begins with invalid keyword or contains invalid variable name". | Solution: To achieve successful compilation of the Fortran statements, please ensure all these rules are acomplish:
The variables beginning with A through H, or O through Z, are double precision real. Variables beginning with I through N are integer. Use double precision functions (for example, DSQRT) and double precis... |
Problem Statement: When the user select an unit operation that works with PSD, why the message "PSD ATTRIBUTE IS NOT PRESENT IN SUBSTREAM 'MIXED', PSD MESH OF SUBSTREAM 'CIPSD' WILL BE USED WITH SOLIDS EVENLY DISTRIBUTED IN EACH INTERVAL" appears? | Solution: This message appears because the solid is specify in the Mixed Tab instead of the CI Solid Tab of the inlet stream.
For example, a Spray Tower is a block that requires a solid distribution, it's necessary that the user inputs the solid in the CISOLID Tab of the inlet stream and also specify a PSD. (How do I... |
Problem Statement: Sometimes you need to add new components to your Aspen Plus Dynamics simulation but you do not want to rebuild an entire Aspen Plus Simulation from scratch, re-export it and end up losing all the work you have already done with your dynamic model.
This article explains how the user can add new compo... | Solution: KB article 119082-2 explains how you can update blocks, controllers and components from within the steady state simulation through the use of a built-in update tool within Aspen Plus. Alternatively, if you are willing to add new components only (or even change the property package), it might be useful to just... |
Problem Statement: How to clear Recent Models window in Aspen Plus | Solution: When opening Aspen Plus, there is a default window showing recently opened files.
To clear the files that show up in Recent Models, please follow these steps:
Make sure that all Aspen Plus files are closed.
Open Windows explorer and access the following route: C:\Users\username\AppData\Local\AspenTech... |
Problem Statement: A closed propane refrigeration solves in Sequential Modular mode but when switching to Equation Oriented mode it fails. | Solution: A closed loop flowsheet can not be modeled in EO the same way as it is modeled in SM. In SM the Aspen Hysys flowsheet does not require a recycle logical operation to converge at the Loop. The same model in EO mode will return several non-linearity errors due to the closed nature of the model. The solution is ... |
Problem Statement: How does AFR handle Cold Standby cases? | Solution: Cold Standby events are handled by AFR in the following way:
If an event is selected for cold standby, then when the event is NOT being used (or is not on a solved path) then the software stops the aging process. That is, while the event is not used it will not incur age (or get older). Once the event is bein... |
Problem Statement: How to change the default database location for Aspen Utilities Planner Optimization? | Solution: By default, all optimization databases are selected to be placed in C:\ProgramData\AspenTech\Aspen Utilities Planner Vx\Example Databases.
However, this default location can be changed from Aspen Utilities Planner > Optimization > Configure
From Database Configuration, please browse desired location to pl... |
Problem Statement: This knowledge base article describes on how to configure User Guidance in Aspen Plant Scheduler. | Solution: Open CNTLS and Set the (ERNG) Enforce Time Range Constraints for Drag and Drop[Y|N] - YES
Possible Values:
YES (or Y): The Activity Drag and Drop Constraint feature is turned on.
NO (or N): (Default) The Activity drag and drop constraint feature is turned off
RELAX: If you drag and drop an activity to a rest... |
Problem Statement: Why sometimes the Utilities Planner Optimizer Editor cannot update databases? | Solution: Before starting to open the Aspen Utilities Planner and Excel Add-in file, please make sure to copy the following database files from the folder:
ProfileData.mdb
DemandData.mdb
TariffData.mdb
Interface.mdb
And paste the files into the following path:
C:\ProgramData\AspenTech\Aspen Utilities Planner V10.0\Exam... |
Problem Statement: How do I activate/deactivate the Uniform Section option in an Aspen HYSYS Column? | Solution: The Uniform Section option can be found in the Column editor under Rating tab | Towers section.
When checked this option, will do all Column stages to have the same physical setup (diameter, tray type, etc.). You may notice this one is grayed out so you won’t be able to activate/deactivate the option.
... |
Problem Statement: Pre- requisites/Tasks to complete before starting the V10.0 Aspen Collaborative Forecasting Installation. | Solution: Aspen Collaborative Forecasting (CF) can not be installed before both JAVA and Apache Tomcat are installed and configured.
1. Install Java JRE 1.8 build xxxx.
2. Install and configure Apache Tomcat.
3. Setup Oracle or SQL Databases
Create two (2) Oracle or SQL Databases: (1) Operational and (1) S... |
Problem Statement: How do you model heat transfer in a Finned Tube? | Solution: The heat transfer observed in the fin tube are:
1) The heat transfer from hot liquid to the finned tube ( convection)
2) The heat transfer throughout the metal ( conduction).
3) Dissipation of heat to the surroundings ( convection)
For one dimensional fin expose to the surroundings at a ambient... |
Problem Statement: Is it possible to assign different stream classes to individual streams? | Solution: Aspen Plus allows the user to define a stream classes with the following options.
CONVEN: Use when the simulation doesn't involve solids or when solids are salts defined using Chemistry.
MIXNC: Use when you have nonconventional solids present but no particle size distribution.
MIXCISLD: Use when you have conv... |
Problem Statement: In AtOMS, How to filter the issued movements as per the Start date in the TimeFrame option for the Movement Summary page? | Solution: In AtOMS, user can select the start date range from which he/she wants to see the movements.This in turn helps in removing the old dated issued movements compared to the Start date selected from the movement summary screen.
To use this filter option, please try the below solution :
1. Open AtOMS > Go to the ... |
Problem Statement: Is it possible to know the duty required in the intermediate streams not displayed on the Delayed Coker unit? | Solution: All the calculations internal to the Delayed Coker model are done on the basis of the kinetic lumps. The model is primarily used for predicting yields. However, there are certain heat terms that can be tracked in the EO model.
The Delayed Coker unit is modeled as follows: the furnace as a combination of a m... |
Problem Statement: This knowledge base article describes the Inventory problems caused by Inventory Run outs and Inventory Over runs and methods to view those problems. | Solution: Inventory problem can arise when there is inventory shortage(Under) or when inventory(Over) is above a specified limit.
Inventory Run Outs - An inventory run out occurs when a product's inventory level falls below the minimum in a particular time slice. The minimum is determined by the MAKE Ignore Order Poi... |
Problem Statement:
This knowledge base article describes the method to view detailed production information for a product on production (demand) and Consumption(Supply) using Supply Demand Balance Report. | Solution:
Supply Demand Balance Report can be used to view detailed production information for the product in each time slice. The report indicates production (positive values) and consumption (negative values) for the product in each time slice.
Accessing the Report
Open the Planning Board.
Click on the Format tab on... |
Problem Statement: How do I set the default file path when opening a case in Aspen Plus | Solution: In Aspen Plus there are 3 ways to configure the directory when opening a case from File | Open button. Go to File | Options | Files | Locations and expand the "More files starts with" option. Select which directory to use from the following options:
Current directory is the directory last used to open or save... |
Problem Statement: Error while upgrading the PSL_V8.8.CAS | Solution: Before you start the upgrade, set CNTLE(SCMPM,1) to NUMLIM instead of NUMERIC. After the upgrades are complete, you can restore the value if you prefer to. The library manager has to compare current version with the library being installed and it requires this setting in some instances without resulting in ... |
Problem Statement: How can I detect streams with negative flows in my simulation? | Solution: Sometimes, due to bad inputs for flow rates, ratios or equations on spreadsheet blocks, a simulation in Aspen HYSYS may calculate negative flow rates in some instances.
Since Aspen HYSYS focuses only on the numeric solution of the mass balance, it can allow and may calculate negative values for flow rates. ... |
Problem Statement: In the Unit Diagram, when should I use Rate Multiplier (Rate Responses) vs. using Link Capacities? | Solution: The attached document provides an overview of when you should be using Rate Multiplier vs using Link Capacity to achieve your desired outcome for Rate Responses. It also provides examples for the same.
Key words
Rate Multiplier, Link Capacity
Keywords: None
References: None |
Problem Statement: This knowledgebase solution documents the increase of UDP network traffic on port 5093 from the SLM client server and how to stop it from happening. | Solution: The SLM broadcasting option is used to broadcast to other Aspentech installations available on the network which can cause a large amount of UDP 5093 traffic generated if the network has multiple installations on the network.
The idea of the broadcasting option is to send the message around the subnet so th... |
Problem Statement: Example: Creating a case study in Aspen HYSYS analyzing the amount of inhibitor required to avoid hydrate formation at different temperatures | Solution: This example shows the necessary steps to generate a case study where the user can exploit the tools in Aspen HYSYS to calculate the required flow of inhibitor that is required to avoid hydrate formation.
The first step is to identify the stream(s) of interest and generate a Hydrate formation analysis. This... |
Problem Statement: How can I link the Actual Volumetric flow of two different streams in Aspen HYSYS? | Solution: In the case that the user needs to link the volumetric flow (Act. Volume Flow) of two different streams, an Adjust operation in addition with a spreadsheet block can be used. Using this method, the values for the volume flow of both streams will be linked regardless if they have different conditions and compo... |
Problem Statement: Upgrade of DAL_V9-0.CAS library runs for some time and fails without any warnings. | Solution: The Library manager logic is contained in the GML library, so sometimes when Aspen makes updates to the library manager logic in a GML, you can then have trouble if you upgrade the GML library and then go right into the next upgrade.
To resolve the issue, follow the below steps:
Install the GML (V9.0).
Save ... |
Problem Statement: What can be done if the SLM License file has been encrypted? | Solution: Method 1 – If done by Symantec Endpoint Encryption (SEE)
If you have received a file or folder that was encrypted using SEE it can be decrypted and opened or read by completing the following steps.
You must know the password that was set when it was encrypted. Please note this cannot be done on Macintosh co... |
Problem Statement: This knowledgebase solution documents why you may see 32766 licenses. | Solution: 32766 total licenses is an indication of having a perpetual based license. Often these are standalone licenses which do not run using an SLM server, but that is not always the case.
To identify whether your license is a token or non-token based (perpetual) license, please do the following-
Open the SLM Lice... |
Problem Statement: When you need to install new software on an old version of Windows operating system, it requires having installed the latest .NET Framework. But in Windows Server 2016, you may want to install the old software which requires older libraries to run. | Solution: Simply installing features on Windows Server is easy to perform through server manager or command line and PowerShell. But in this case the .NET Framework needs a source directory to completely install on Windows Server.
Install .NET Framework 3.5 on Windows Server 2016
Using the latest Windows Server 2016, y... |
Problem Statement: How does the Mixed Mode Method work and how do I set it up correctly? | Solution: The Mixed Mode is a Solution Strategy which allows a hybrid solution between the Sequential Modular (SM) and Equation Oriented (EO) techniques to converge a simulation. It is used when you deliberately want to run a model in SM while on EO.
This Method works by using a Perturbation Layer around the block you... |
Problem Statement: In the event of having reduced capacity upon failure of an item, the flow should go through the event at normal operation however, the validation shows otherwise. Is there an explanation for this? | Solution: This is a side effect of the algorithm used. If all paths are up (or available) then it selects the path(s) that will provide the greatest capacity. In the above case, it is choosing the path of least resistance. That is, the path with no events. Mathematically, if the “Bypass” event is not in cold standby, t... |
Problem Statement: This knowledge base article describes the steps to configure version 2 Activity Editor. | Solution: Open CNTLS
Specify the Activity Editor Version to 2
Specify the Activity Editor Control table to be AECTL1
AECTL1 Activity Editor control table and is dimensioned by TYI.
AEPSMFG table provides control over MODIFIABLE, INVISIBLE, READONLY tabs of the Activity Editor.
AEOMFG table that provides control th... |
Problem Statement: Starting from V10, we need to specify the Capacity Multipliers in the Rate Multiplier form. Is it possible to specify the Rate Responses similar to the legacy Titan version? | Solution: Starting in V10 CP4, the response configuration section of the rate multiplier unit op form has been improved to allow you to select the number of paths required for 100% operation (as shown in attached screenshot). The drop-down selection allows you to specify N/A or any value from 1 to N, where N is equal t... |
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