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Problem Statement: aspenONE Process Explorer client opens with the following error message:
CheckXML(): Failed to parse: <!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01//ENhttp://www.w3.org/TR/html4/strict.dtd>
<HTML><HEAD><TITLE>Server Unavailabl | Solution: Make sure the AspenProcessDataAppPoolx64 is running in IIS. If it's not running, try to start it. If it's configured to run under a specific user account and the account password has been changed recently, reset the password on the account in IIS and try starting the app pool again.
Keywords: None
References:... |
Problem Statement: How do I enable on-demand PRT files for Aspen Process Controller FIR and MISO applications? | Solution: The entry DebugPrintCounter needs to be configured for FIR (DMCplus) and MISO (NonLinear) applications.
Note: The DebugPring entry does not have any effect on the Debug output for FIR or MISO based Aspen Process Controller –RTE- applications (only MIMO).
For Windows 2008 R2 64-bits and Windows 2012 the PRT fi... |
Problem Statement: This Knowledge Base article provides steps to resolve the following error message received in Aspen Search when performing a Data Source Scan:
Scan Data Sources throws a timeout error : Failed to publish tag metadata to localhost ( Failed to send HTTP request ( The operation was timed out)) | Solution: The timeout error can be solved by incrfeasing the initial and maximum memory pool in Tomcat Java settings. Below are the configuration steps that resolve the issue:
1. Navigate to the Tomcat/bin folder, e.g., Program Files (x86)\Common Files\AspenTech Shared\Tomcat7.0.57\bin
2. Run tomcat7w.exe
3. ... |
Problem Statement: This Knowledge Base article shows how to schedule the daily automatic database scans by Data Source. | Solution: It is not possible to schedule the daily automatic database scans by Data Source from the Manage Search Data Admin UI. However, this can be accomplished by creating an aspenONE Scheduler Job for each data source that should be scheduled:
1. On aspenONE Process Explorer server, go to Tomcat folder, c:\... |
Problem Statement: What is the position of the impingement plate for an exchanger with a dome? | Solution: Aspen Shell and Tube Exchanger can help users design an exchanger with a dome and insert an impingement plate(round/square). The default position of the impingement plate is on the top of the tube bundle as shown below.
If users would like to change this position, they can first select Dome as the Nozzle/Impi... |
Problem Statement: Since Microsoft Visio gives users the ability to make custom graphics and symbols and copy them to a user's clipboard, can you create custom symbols in Microsoft Visio and use then in an aspenONE Process Explorer graphic? | Solution: AspenTech only supports symbols and graphics developed by AspenTech.
The symbols created by AspenTech can be found in the directory:
C:\Program Files (x86)\AspenTech\Web21GraphicStudio\Libraries\Basic
You can create graphics in .WMF format and import them into AspenOne Process Explorer.
Keywords: Visio
Custom... |
Problem Statement: In Aspen Shell and Tube Exchanger, the users can import a customized Aspen Properties file through Input | Property Data | Hot (Cold) Stream Compositions | Advanced Options. Normally, after importing the file, the corresponding stream should have the same properties as shown in the Aspen Properties f... | Solution: When an Aspen Properties file is used in EDR with ELECNRTL method, the mole fraction of the true component should be specified.
The users need to go to Input | Property Data | Hot (Cold) Stream Compositions | Compositions, and enter the true component composition, i.e. the electrolytes' mole fraction. Then, g... |
Problem Statement: The following error occurs when trying to add a comment to an aspenONE Process Explorer Event Plot: | Solution: This error occurs because aspenONE Process Explorer is attempting to historize a comment or annotation in a record that does not exist. This error occurs most frequently when there is no Aspen InfoPlus.21 database that contains the commenting record, Comments, which is defined by IP_CommentDef. To enable this... |
Problem Statement: When modeling a Reflux condenser, where can I find the calculated flooding velocity? | Solution: The calculated flooding velocity will be reported in the Warning/Messages|Advisory Notes section under Advisory Note 1334
Keywords: Relux condenser, flooding velocity, Advisory Note
References: None |
Problem Statement: What is the aspenONE Credentials utility - also known as aspenONE Search Engine Configuration? | Solution: aspenONE Credentials is a utility that can be used to change the Tomcat and/or LDAP username and password everywhere on the server. When the Tomcat username or password changes, it will encrypt the new username and password in the required formats and update all the configuration files. It will also update ... |
Problem Statement: Since event plots source data from Aspen Production Record Manager, does Aspen Production Record Manager have to be configured in order to use aspenONE Process Explorer's Event Plots? | Solution: Event plots can source data in three ways:
1. Aspen Production Record Manager
2. Comments
3. Alarms
If Aspen Production Record Manager is not installed, event plots can still be used if they are use data from comments or alarms.
Keywords: Event Plots
Aspen Production Record Manager
References: Non... |
Problem Statement: External enhancements are designed for boiling and condensing applications. How can one model the external enhancements in the Aspen Shell & Tube Exchanger Program? | Solution: The program does not explicity model the external enhancement on the tubes. One can make allowance for it by explicity specifying the shellside heat transfer coefficient or by specifying a multiplier for the calculated coefficient. This can be found under Program Options / Thermal Analysis / Heat Transfer tab... |
Problem Statement: How do I prevent Input error 1124: The data input for separate cold liq/vap is unacceptable? | Solution: The Input error 1124 is coming due to the cold side's outlet nozzle specification. Aspen Shell & Tube Exchanger requires a kettle or knockback condenser to have separate nozzles for liquid and vapor outlet. You will get this error if you choose no for Use separate outlet nozzles for cold side liquid/vapor flo... |
Problem Statement: From Input > Exchanger Geometry > Bundle Layout > Layout Parameters tab, the “Number of sealing strip pairs” can be entered. This | Solution: explains what they are and what the impact of using them are.Solution
If the baffle cut is in line with the nozzles, the need to provide entrance/exit areas by leaving out tube rows may result in excessive by-passing of the tube bundle. Sealing strips can be used to reduce bypassing of the shell side flow ar... |
Problem Statement: Getting Invalid Map (IP_AliasMap) when refer to an Alias tag on A1PE graphic. | Solution: This issue is due to the IP_AliasMap that gets specified in the Map portion under the Data tab in Properties due to the fact that it is an alias record. Please remove the map and specify <VALUE> in the Attribute portion as per below.
Save and republish the graphic. Clear the browser cache and check if the... |
Problem Statement: This Knowledge Base article provides steps to resolve the following issue:
Some Ad-hoc calculation are working in aspenONE Process Explorer while others are not.
Examples:
 =movingaverage({WIT-14005}, 00:01:00) does work
 =log10({WIT-14005}) does not work | Solution: Run the following command in the directory where the CalcBuiltinFunctions.dll file is located:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\regasm CalcBuiltinFunctions.dll /codebase /tlb:CalcBuiltinFunctions.tlb
Verify that you are able to trend in A1PE the Ad-hoc calculation that was failing before.
Exa... |
Problem Statement: The message Unable to validate server response. Search Service responded with the following error HTTP Code: 512 appears while opening the search in a single event plot when trying to add a characteristic.
This may also appear with other aspenONE Process Explorer plotting options. | Solution: The error is associated with a lack of domain security configuration in the aspenONE Credentials tool. To correct this, close out of aspenONE Process Explorer and open the aspenONE Credentials tool by navigating to Start | All Programs | AspenTech | Aspen Manufacturing Suite | aspenONE Process Explorer | aspe... |
Problem Statement: How do you add internal fin tubes in the Aspen Shell & Tube Exchanger? | Solution: Internal Fin tubes are not very commonly used in general heat transfer application because cleaning of these tubes is extremely difficult. Direct modeling option of these tubes are not available in EDR however we have few workarounds available.
1. You can include these as Relative Roughness. That will help to... |
Problem Statement: After upgrading aspenONE Process Explorer, the search page does not load and the waiting “spinner” icon spins continuously. This was working correctly before the upgrade. | Solution: This is known behavior which can occur if you had not cleared the browser cache before returning to the upgraded aspenONE Process Explorer web site (URL). Instructions for clearing the cache should be provided by the web browser product.
Keywords: a1PE
Search for Everything
References: None |
Problem Statement: I can't seem to find the Aspen Assay Manager help file. There is no usual Help tab like in Aspen PIMS and Aspen Petroleum Scheduler. | Solution: All newly developed AspenTech software will have a question mark icon in the top right of the screen, just under the Close button. This is not what most PIMS and APS users have been used to over the years.
Another way of reaching the help file is by pressing F1
Help icon is also shown with a red arrow on th... |
Problem Statement: STI files are created by STX™ from AspenTech.
STX was the predecesor of Aspen Shell and Tube Exchanger. STX allowed users to design and rate shell and tube heat exchangers with methods based on open-literature. This | Solution: explains how to convert the .STI files into .EDR files using EDR V8.4.
Solution
In V8.4, the File Conversion Utility is not included in the Star Menu / Programs / AspenTech / Exchanger Design and Rating V8.4 folder.
Therefore, in order to convert the STI files, the following procedure has to be ... |
Problem Statement: I have linked a Heat Exchanger in Aspen HYSYS to Aspen Exchange Design & Rating (EDR) through the Rigorous Shell and Tube Feature. The reported properties, however, for the streams in Aspen HYSYS are not identical to the liquid and vapor properties inside the EDR Overall Summary Form. How can I get a... | Solution: There should be a close match between the values reported in HYSYS and EDR. To get a closer match between the properties, the user will have to match the estimated pressure drop in Aspen HYSYS to the pressure drop calculated in EDR. Through the Heat Exchanger|Rigourous Shell&Tube|Process input inside HYSYS th... |
Problem Statement: The input and calculated values in the Nozzles page of the Exchanger geometry are not consistent. For example, when introducing a new Actual ID (inner diameter) for the same Actual OD (outer diameter), the value of the wall thickness is not updated. | Solution: If the user wants to introduce the internal ID and the thickness of a shell side nozzle in an existing bundle layout (Simulation/Rating mode), please follow these steps:
a. Go to Input/Exchanger Geometry/Bundle Layout
b. Choose the tab ‘Tube Layout’
c. Select the ‘Nozzles’ view from the drop-down m... |
Problem Statement: How do I find vibration tubes in the Tubesheet Layout output? | Solution: To see vibration tubes in the Tubesheet Layout output, click the Vibration Tubes box above the diagram. A red V appears on the vibration tubes, and a table with further information on these tubes appears below the Layout. If there is a very large number of tubes in the layout, you need to zoom in to be able t... |
Problem Statement: If installing aspenONE Process Explorer as a Workgroup machine you may get error Null | Solution: Edit file web.config found in c:\inetput\wwwroot\AspenTech\DispatchService\Metadata and look for keys LocalMetaDataService and LocalSearchServer. Remove any reference to .WORKGROUP so that the entries just include the system name.
Keywords: Null
References: Exception when trying to scan all data with url suc... |
Problem Statement: This Knowledge Base article provides steps to resolve the following issue with aspenONE Process Explorer trend files:
a1PE trend links disappear from the Navigation Pane overnight even though the XML files are still in the web server. Moving the files out of the folder they are in and putting them ba... | Solution: The issue is caused by a backup routine that runs at night and changes an attribute on the trend files. The Attribute A, which indicates that a file is ready for archiving, is changed overnight by a backup routine to N, which indicates that a file has been archived.
However, aspenONE Process Explorer does not... |
Problem Statement: This knowledge base article explains how to create a dynamic list for a custom definition record in aspenONE Process Explorer. Aspen InfoPlus.21 updates a dynamic list whenever a record in the list changes. This provides a convenient way to display a tabular display based on fields from the records... | Solution: Suppose we have a custom definition record named Cst_BasicRecDef defined as follows:
with the following records defined against Cst_BasicRecDef:
Follow these steps to create a dynamic list for Cst_BasicRecDef:
1. Create a new SummaryDef record and set values for fields SUMMARY_LINE_LENGTH and MAX_SUMMARY_LI... |
Problem Statement: Aspen Process Explorer graphics are created and viewed with the .atgraphic extension, but this extension is not readable by aspenONE Process Explorer. This | Solution: describes how the graphics can be converted, in bulk, into .json files that are readable by aspenONE Process Explorer. In this way, the graphics do not need to be redrawn or opened and converted one by one.Solution
First, collect all your .atgraphic files and place them into one folder. These graphics can be ... |
Problem Statement: For Aspen InfoPlus.21 versions V8.8 and earlier, an .rld file from KB | Solution: 143917 can be used to load the necessary files to allow commenting to work in aspenONE Process Explorer V8.8.1 or later. Do I need to load this file onto all my Aspen InfoPlus.21 servers?Solution
For each aspenONE Process Explorer web server, there only needs to be one Aspen InfoPlus.21 server that contains ... |
Problem Statement: Getting Unable to validate server component when entering a tag name or searching for tags in aspenONE Process Explorer.
Unable to validate server component
When checking the aspenONE Process Explorer Admin program to scan the Aspen InfoPlus.21 tags user gets an error:
Search Engine Status: Not R... | Solution: These symptoms indicate a problem with the deployment of the Apache Tomcat solr application which is used in aspenONE Process Explorer tag searches. To correct this perform the following steps on the aspenONE web server:
· Was the Java V 1.8.0_xx pre requisite installed?
· Was either the J... |
Problem Statement: In the results for Vibration & Resonance Analysis in Aspen Shell and Tube Exchanger, what does the Logarithmic Decrement (LDec) mean in the results for Fluid Elastic Instability analysis? | Solution: The logarithmic decrement (δ) is related to the amplitude of successive oscillations of the tubes and it is used to calculate the damping ratio of the system. It is calculated from the following equation:
Where An and An+1 are the successive oscillation during vibration.
The fluid elastic instability is not a... |
Problem Statement: In the design of heat exchangers, high heat transfer coefficients are normally required to give a compact design. This may lead to high cross flow velocities which are normally limited by the allowable pressure drop. However, in certain circumstances the onset of vibration may be the limiting factor.... | Solution: In general, two approaches can be used to minimize vibration:
1. Reduce tube unsupported length - so increasing Natural Frequency
2. Reduce crossflow velocity - so reducing energy given to tube
Unfortunately these two requirements often conflict while the heat transfer and pressure drop specifications still... |
Problem Statement: What could be the reason that the Aspen Simulation Workbook (ASW) Scenario Table does not run or update when linked to Aspen Exchanger Design and Rating (EDR)? | Solution: The scenario table created in ASW may not run or update results if the EDR file is over-specified in terms of process data. By deleting the process data over specification, the Scenario Table should run and update the results accordingly.
For instance, provide three of the following specifications (Hot side f... |
Problem Statement: Duty on TEMA sheet is not matching with the duty specified in the input filed. | Solution: When Aspen Shell & Tube Exchanger (Tasc+) is run in Design or Rating/Checking mode, sometimes the duty value on the TEMA sheet may not match with the input data. This will happen in the case of an over specification, for example, in the Input | Process data page if mass flow rate, inlet/outlet temperatures, i... |
Problem Statement: We have observed that there are circumstances that will cause the MSI installer to determine that it must re-install something that has been removed.
Though it has only been observed with Advanced Control software, it could conceivably apply to other products in the aspenONE suite.
A client deleted t... | Solution: There are twoSolutions/work-arounds for this behavior.
1. Quite simply, do not delete anything that the MSI has installed.
2. Disable the MSI from automatically starting an install on an online computer.
This is how to disable the msi from automatically starting an install on an online machine....The customer... |
Problem Statement: Why does a thermosyphon reboiler exhibit two-phase flow instability behavior? How do I remove this flow instability warning? | Solution: Instabilities are common to both forced and natural circulation systems. Instabilities can cause operational problems in process heat transfer. Thus, it is important to classify mechanisms that can lead to unstable operational behavior of the thermosyphon. The following processes can lead to an unstable behav... |
Problem Statement: When TEMA sheet is exported from EDR to Excel using the default template and the EDR file is re-run or closed/re-opened, the spreadsheet is updated with the original values and any changes made are lost. How can I get rid of this problem? | Solution: The Excel file that is exported via EDR has code within it to maintain a link with Excel - this is by design.
If your intention is to edit Excel only and not have it linked to EDR in any way, the connection should be broken. To do so, you need to modify the code within the Excel file. Please find steps below:... |
Problem Statement: What does it mean 'Missing variable type' on an APC controller message (Event Viewer \ RTE)? | Solution: The ‘Missing variable Type’ entry is logged when a User Defined Entry has a change.
User: UserName requested entry at: VariableName/UserDefineEntry be changed to x.xxxx.
Missing variableType with UseEntryFormat for message format parameter #2.
Entry at :VariableName/UserDefineEntry changed from x.xxxx to x.... |
Problem Statement: When a User-Defined parameter is added to a variable (under Edit Calculations section) in APC Builder, the default setting for a Logchange property is False. This is to prevent a message to be generated every time the parameter is changed. In rare instances, when a ccf file is imported into APC Bui... | Solution: Rather than select the LogChange and toggle the property which is grey out in this case, select the DefaultIOFlags line and delete the word LogChange.
Keywords: LogChange
User Define parameters
Calculations
APC Builder
References: None |
Problem Statement: After installing v7.2 CP4 for Aspen APC Web Server the Aspen APC Web Provider Data Service fails to start | Solution: Symptom: After installing v7.2 CP4 for Aspen APC Web Server the Aspen APC Web Provider Data Service fails to start
Cause: The original WebDataProviderSvc.exe.config file had been modified since the original v7.2 installation and so the patch config file was not applied.Solution Verify this is the case, by lo... |
Problem Statement: How do I change the refresh rate in a graphic published to aspenONE Process Explorer or Aspen IP.21 Process Browser? | Solution: ThisSolution applies to Aspen Process Browser Graphics Studio V8.7 with Aspen MES Cumulative Patch 2 applied or any future version.
To change the refresh rate of a graphic.
1. Open the Project and Graphic in the Aspen Process Browser Graphics Studio.
2. R-click on white space in the graphic and se... |
Problem Statement: aspenONE Process Explorer wass introduced the V8.5 release of Aspen Manufacturing products. | Solution: aspenONE Process Explorer is a web-based application, accessible on multiple web-enabled devices, for visualizing real-time and historical process data and you can access it the aspenONE web site:
To access aspenONE Process Explorer, type the following url in your browser:
http://<aspenONE>/ProcessExplore... |
Problem Statement: XY charts can be used to see if there is a mathematical relationship between two different data points. This | Solution: outlines two ways to open a brand new XY plot in aspenONE Process ExplorerSolution
To open a new XY Trend, click the large + symbol on the top left section of the trend chart to open up a pop-up showing the various plot types. Select XY Chart from the Basic category. This will open a blank chart ready for XY ... |
Problem Statement: Where is the aspenONE Workspace file stored and what is its name? | Solution: aspenONE Workspace is stored in the Private folder for each individual user. The name of the file is aspenONE.Workspace.
An example for user called 'Aspen':
C:\inetpub\wwwroot\AspenTech\ProcessExplorer\Files\Private\Aspen
Keywords: None
References: None |
Problem Statement: How is the latent heat of a stream calculated? It is not part of the physical property data that is entered using the direct input method. | Solution: The calculation of the latent heat by Aspen Shell & Tube Exchanger for example is based on the physical property data supplied.
For a single component, the latent heat is defined as the saturated enthalpy of the vapor minus the saturated enthalpy of the liquid at the same temperature.
For a mixture, the laten... |
Problem Statement: Within the Aspen EDR programs, it is possible for users to create their own chemical properties databank for those fluids that are not found in any of the EDR databanks (B-JAC Databank, COM-Thermo or Aspen Properties).
The private databank can accommodate up to 400 different fluids, where details on ... | Solution: The databank is contained in three files;
D_IDPriv
D_FxPriv
D_VaPriv
These files will normally be in the folder where the program has been installed, e.g. 'C:\Program Files\AspenTech\Aspen Exchanger Design and Rating V7.2\Dat\PDA' and can be copied across.
However, the files could be located in a different ... |
Problem Statement: In Aspen Shell & Tube Exchanger, on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab the program reports ''Shell Entrance Flow Area'' and ''Shell Exit Flow Area'' values in the Rho*V2 analysis section. How are they calculated? | Solution: Shell entrance and exit flow area values are output on Results | Thermal / Hydraulic Summary | Flow Analysis | Flow Analysis tab. They are calculated according to the methods given by TEMA. From TEMA 9th Edition (2007), the flow area calculations are described in details in Section 10 ''RGP-RCB-4.62 SHELL OR ... |
Problem Statement: As described in | Solution: 121775, users can transfer a heat exchanger case between Aspen Shell & Tube Exchanger and Aspen Shell & Tube Mechanical, by going to Run | Transfer, and selecting the desired program name.
However, this behavior will cause Aspen Shell & Tube Exchanger and Aspen Shell & Tube Mechanical programs to be opened ... |
Problem Statement: How can I export Tasc+ or Acol+ Results data to Excel? | Solution: After running the calculations in Tasc+, the results can be exported to Excel. This can be done from the main menu File | Export to | Excel (there are two options available 1. using a default template 2. using a specified template).
During HTFS+ installation, several pre-built excel templates are copied to ... |
Problem Statement: How does Aspen Shell & Tube Exchanger consider flow distribution on X shells? Does the number of nozzles have an influence on shell side flow distribution? | Solution: As shown in the figure below, Aspen Shell & Tube Exchanger assumes the shell side flow path in an X-shell to be evenly distributed along the tube length axial of the exchanger as soon as the flow enters the inlet nozzle(s). The shell side flow will be pure cross flow along the direction perpendicular to the t... |
Problem Statement: In Aspen Shell & Tube Exchanger on Results | Thermal / Hydraulic Summary | Performance | Overall Performance tab both shellside and tubeside Inlet/Outlet Pressures are reported. On Results | Calculation Details | Analysis along Shell/Tube | Interval Analysis tab, local pressure values along the shell... | Solution: explains why.
Solution
The Shell/Tube side Inlet/Outlet pressures on the Overall Performance tab are based on the very end points of the whole process, i.e. the ''Shellside Inlet Pressure'' is the shellside flow pressure at the entrance to the inlet nozzle(s), and the ''Shellside Outlet Pressure'' is the shel... |
Problem Statement: If ''User specified properties'' are used in the Aspen Exchanger Design & Rating (EDR) software, users must manually type in their own property data at up to 24 temperature points and 5 pressure levels. However, sometimes the specific enthalpy values may not be always readily available. This | Solution: describes how to calculate the enthalpy changes (specific enthalpies) from other property data.Solution
FromSolution 119148, the specific enthalpy can be back-calculated as below.
dh = Latent Heat * dx + [(1-x) * Cpl + x * Cpg] * dT
where:
dh = change in enthalpy
dT = small change in temperature
dx = change i... |
Problem Statement: The data published from any of the applications such as Aspen Operations Reconciliation Accounting, Aspen PIMS or Aspen Petroleum Scheduler can be processed within the Aspen Reporting Framework GUI and stored in the Aspen Reporting Framework database. This data within the Aspen Reporting Framework da... | Solution: The following procedure gives you detailed steps on how to connect to the Aspen Reporting Framework database to view the data in the OLAP cube within BIDS.
? Open the Microsoft SQL Server Business Intelligence Development Studio (BIDS) from
Start | Programs | Microsoft SQL Server 2005 | SQL Server... |
Problem Statement: This knowledge base article demonstrates a step by step procedure which outlines how to configure one of the 3rd party client applications i.e. Microsoft Excel to visualize the data from an already existing Aspen Reporting Framework database. | Solution: Go to Microsoft Excel and click on Data | 'PivotTable and PivotChart Report' which opens up a PivotTable and PivotChart Wizard. In that wizard select External data source as an option and click Next.
? Click on Get Data which opens up a new Choose Data Source dialog box and in there go to the OLAP... |
Problem Statement: For the physical properties in the Exchanger Design and Rating (EDR) suite of programs there are a number of ways that the data may be entered;
· Use one of the databanks like Aspen Properties, COMThermo or B-JAC to select from a range of components to define a single component for the stream of ... | Solution: Property points at various temperatures which encompass the operating temperatures of the exchanger are entered.
User Specified properties
If the stream is liquid or vapour only, then the properties like density, specific heat capacity, and thermal conductivity must be entered. It is not necessary to enter t... |
Problem Statement: How to send all controller messages to DCS? | Solution: ThisSolution applies only for controllers deployed under the RTE platform (APC Builder, DMC3Builder)
I. On Aspen Info Plus.21 Administrator start by creating a new IP_TextDef record that will hold the messages from controller event. Use the same name of the controller and add something like “_msg� or “_... |
Problem Statement: Where can I find the Aspen Process Controller - Collect files? | Solution: Go to :\ProgramData\AspenTech\RTE\Vx.x\Clouds\Online\DataCollection folder where *.INFO and *.DATA file are listed* (besides the DataCollection.config file).
* The path is for a Windows 2008 64-bits Server. If other OS is used follow the equivalent path.
The file names are associated to the *.INFO creation ti... |
Problem Statement: In Aspen Shell & Tube Exchanger when using the “find flow” option for a thermosiphon, the flowrate through the exchanger is calculated from a pressure drop balance around the piping circuit and the heat exchanger. When the program runs, a check is made on the thermosiphon flow rate to see if the flo... | Solution: The method used is described in the HTFS Handbook Sheet TM16 “Stability Assessment of Boiling Two-Phase Systems” that can be found from the Aspen HTFS Research Network at http://htfs.aspentech.com/resnet.asp However, this report is enclosed, where it is a graphical method, whereby the x and y co-ordinates are... |
Problem Statement: How are different Databanks selected based on the default databanks and the Property Method? How are the databanks effected by changing or deleting Property Methods?
For example:
Start with a blank Simulation.
Go to Tools-Options and select ENRTL-RK and HENRY as your only Binary Databanks.
Go to Prop... | Solution: The logic for many databanks is based on the vapor phase equation of state model name and the liquid phase activity coefficient model name for the property method.
The list of Selected databanks is determined by:
1 - The list of databanks specified as searchable on the Tools/Options/Component data tab
2 - The... |
Problem Statement: In the Aspen Hydraulics Dynamic sub-flowsheet, why is there a temperature drop across swage while the material is expanding? | Solution: In Aspen HYSYS Dynamics, temperatures are reported at the pipe cell centers, that is, the temperature at half the axial distance of the pipe cell. Therefore, you don't see what is happening at the swage interface (actual zero pipe distance). If you look at the first cell of the pipe segment after the swage th... |
Problem Statement: Why am I not able to delete or select case in the Recap of Design page? | Solution: Go to Application Options, and Set the Storage for Recap of Designs to “Full Recovery”. Then rerun the case file.
Check the status under Recap case fully recoverable. Only the case which has “Yes” status will be able to be deleted or selected.
Keywords: Recap of design, delete, select case
References: None |
Problem Statement: Best Practices for pigging analysis in Aspen Hydraulics. | Solution: Please find below some recommendations while performing a pigging analysis in Aspen Hydraulics subflowsheet.
· Dynamic Solver
Pigging can only be performed with Regular Dynamic solver for Aspen Hydraulics. Dynamic3p and the Compositional solvers are not supported for this analysis.
· Integra... |
Problem Statement: When trying to load a composite file using the composite_manage DOS application, a message like the following pops out in the command prompt: Unable to find lock position: no error | Solution: The error “Unable to find the lock position: no error” for an Aspen product typically indicates that the user needs to run the applications using the “Run as Administrator” feature in Windows. Note that in Windows server 20xX, a user with Administrator rights/privileges does not necessarily equal a local syst... |
Problem Statement: AspenONE Process Explorer has a basic plot option for manual data entry which allows you to manually update the value of a tag in the Aspen InfoPlus.21 database. | Solution: The option to select Manual Data Entry cannot be disabled; however, if a user does not have write access to a particular tag, then the Aspen InfoPlus.21 database security prevents the update.
Keywords: Manual Data Entry
security
References: None |
Problem Statement: Got CIMIO_ACG10S_Excess Tagss, Too Many Tags in Record error. | Solution: Aspen Cim-IO for Yokogawa ACS10S has following limitation.
Read: 32 tags at a time
Write: 8 tags at a time
So, IO_#TAGS of Get and Put transfers should be limited as follows.
Get Transfer : 32 maximum
Put Transfer : 8 maximum
And, LISTSZ of DMCplus controller should be set to 8.
Keywords: CIMIO_ACG10S_Excess ... |
Problem Statement: Why does the CCFswitcher stop and start the Composite process? Is that necessary to make sure the aliasing is correctly rebuilt? Or is there another reason (besides taking into account changes in the INI file)? Does the online composite process use the SSG and MAP files or are they only generated for... | Solution: ALIDWN can be read from the DCS. Below is an example. You need to make sure it is declared at CH(60). The Composite reads the new mapping on the fly and does not require a restart to use the new mapping. DCS logic can swap the ASC string.
.ALIDWN001~~~READ~~~CH(60)~~~FMX C2FUELPV FC121SP~~~::F01_ALIAS.Alias... |
Problem Statement: Aspen DMCplus Composite Critical Status on the Aspen Production Control Web Server (PCWS) display does not match the critical settings in .ini file. | Solution: The composite ini file is not loaded online and is therefore not maintained in the online shared memory. The critical status setting in the ini file is not considered when calculating the critical status to be displayed on the PCWS web page.
The composite critical indicator displayed in PCWS is different fr... |
Problem Statement: When the heat flux to a surface is increased, a point is reached where the contact between the liquid and the heated surface is lost. At this point, the heat transfer coefficient is greatly reduced and the surface temperature rapidly increases. This point is called the “critical heat flux”, CHF, w... | Solution: An indication of how close the process is operating to the critical heat flux, can be found from Results | Thermal / Hydraulic Summary | Heat Transfer | MTD & Flux tab, from the “Highest ratio, actual/critical flux.
Care should be taken in interpreting the table as the critical heat flux (at highest ratio) ma... |
Problem Statement: Which TCP ports does aspenONE Process Explorer (A1PE) need in order to work successfully? | Solution: A port needs to be opened between the end user system and the machine which is serving the aspenONE Process Explorer. This will typically be port 80 unless the default settings have been changed in Internet Information Server (IIS).
Keywords: ports, configuration
References: None |
Problem Statement: Formula to copy a value from exported TEMA to another sheet does not work (shows the formula only or #VALUE! error). | Solution: Change the default worksheet name from Tasc+ to Tasc. The + sign (or any special character) in the worksheet name causes problem. The plus sign will be removed from the worksheet name in a later version of Shell&Tube.
Keywords: TEMA, worksheet, exported, formula, #VALUE, excel
References: None |
Problem Statement: How to specify the geometry of the Multitube Hairpin Exchanger | Solution: Multitube Hairpin Exchanger will contain two shells. So when specifying the geometry specify the information relevant to single shell.
Number of Tubes: Specify double the number of U-tubes or total number of tube holes in the tubesheet of one shell.
Tube length: Specify the total effective length of tube in o... |
Problem Statement: The liquid heat capacity for solvents other than water can be significantly off with ELECNRTL. Can solvent liquid heat capacities be improved by using the saturated liquid reference state for enthalpy with ELECNRTL? | Solution: The saturated liquid enthalpy reference is not compatible with ELECNRTL calculations. Consider a system with Water, Acetic Acid and Sodium Hydroxide. Acetic Acid and Sodium Hydroxide react to form water, sodium ion and acetate ion. Databank values for ions are dependent on the pure component reference state. ... |
Problem Statement: Why are fouling resistances not taken into account for hydraulic calculations in my heat exchanger? | Solution: In heat exchanger design, it is expected to get a higher pressure drop and higher velocity when fouling conditions increase. When I specify fouling resistances in my heat exchanger, these are not affecting hydraulics results, such as pressure drop or velocity. The fouling resistance specified in the Process D... |
Problem Statement: Aspen Plus version 10.2 through version 12.1 allowed users to export an input file with graphics. This feature does not appear to be available in version 2004 and later. | Solution: This option was changed to allow the export of an input file (.inp) where the graphics information is now exported to the Aspen Plus embedded object file (.apmbd). When opening an .inp file in the GUI, the flowsheet graphics will be loaded if an .apmbd file is present in the directory.
The export to an input ... |
Problem Statement: A flowsheet runs perfectly when specified as a 3-phase (vapor-liquid-liquid) system; however, there are errors when it`s specified as a 2 phase system in Aspen Plus. The system is expected to be a 2-phase (vapor-liquid) system, and the results indicate that no 2nd liquid phase exists. Why would this ... | Solution: This problem can occur when the Water Solubility Method (SOLU-WATER) is 0 (K-value of water calculated from water-solubility correlation with vapor fugacity of water calculated by free-water phase property method) even though Free-Water is not used.
The Water Solubility method (SOLU-WATER) normally only assoc... |
Problem Statement: There is a mass imbalance in a block. Why would this occur? | Solution: Some types of specifications such as pseudoproduct streams, stream manipulator blocks, and heat duty or work load specifications without a heat or work stream may cause imbalances.
Each unit operation model in Aspen Plus has a Results form with a Balance sheet that displays a summary of material and energy ba... |
Problem Statement: When creating a dashboard displaying multiple aspenONE Process Explorer trends, some windows may be analytics plots that consume two tokens, but some screens may just be normal Trend Plots that do not consume any additional tokens. This may cause confusion as to how many tokens this dashboard will co... | Solution: The dashboard will consume tokens equal to the largest token consume of any of those screens. This means that it will consume two tokens if any of the screens are displaying an analytics plot, but if no analytics plots are displayed, then the dashboard will not consume any additional tokens.
Keywords: dashboa... |
Problem Statement: How do I select custom start and end dates in an aspenONE Process Explorer Trend Plot? | Solution: The aspenONE Process Explorer trend plot functions similarly to a trend plot from classic Process Explorer, except the interface looks different. This may lead to confusion as to where certain tools lie.
In an aspenONE Process Explorer trend plot, the time line lies just below the chart area. The gray box den... |
Problem Statement: For a boiling stream, you can specify the use of a heat transfer coefficient based on a boiling curve which you may supply. A boiling curve can be applicable when nucleate boiling dominates and convective boiling is small.
A boiling curve gives the relationship between the heat flux and driving wall ... | Solution: Described below is the form of the boiling curves that may be entered.
The corrections to the boiling curve can be set where there are a number of options:
· No corrections - Use as given, with no corrections for mixture effects or convective boiling. This option should only be used when there is a g... |
Problem Statement: Why does the superheating/condensing transition region produce spikes in heat transfer coefficient? | Solution: For a pure fluid (single component), when the condensation begins, the only resistance to heat transfer is an initial thin film. The heat transfer coefficient in this case is very high. Technically the film thickness begins at zero, so the coefficient starts with a very high value. The coefficient then falls ... |
Problem Statement: Why is the calculated vapor outlet temperature by Aspen Shell and Tube Exchanger lower than the displayed bubble point? How is the bubble point calculated? | Solution: In some cases, you may see a vapor outlet temperature lower than the displayed bubble point in the TEMA sheet as shown in the screenshot below:
Bubble and dew points are calculated at the inlet pressure. Hence, the bubble point 267.08 F shown in the screenshot represents the inlet stream bubble point. The inl... |
Problem Statement: What combination of series and parallel configuration are allowed in Aspen Tasc+? Is it possible to use different sizes or types of exchangers in one file for a series / parallel combination ? | Solution: Aspen Aspen Tasc+ does allow combinations of both series and parallel heat exchangers in a given file subject to the constraints indicated below:
1.) For parallel exchangers, feed streams are equally divided among each parallel path, with all exchangers being of identical size, type and configuration.
2.) The... |
Problem Statement: How do I transfer the program settings from the old version to a new version? | Solution: This can be achieved by running the Version Control Utility (BJACVC.exe) from either Start | All Programs | Aspen Tech | Exchanger Design and Rating V7.1 or the window explorer. Using the window explorer, navigate to local drive where you have installed the software | Program Files | Aspen Tech | Aspen Exchan... |
Problem Statement: How to model a bayonet type heat exchanger in Aspen Exchanger Design and Rating (EDR) | Solution: The bayonet type exchanger (also called Stab-in exchanger) is not directly handled by EDR. However, it may be possible to mimic such an exchanger by using AXU, BXU, AKU or BKU TEMA types with the Thermosiphon application (Input | Problem Definition | Application Options).
Please note the following items:
TEMA... |
Problem Statement: When building the search index for aspenONE Process Explorer the following error message is logged:
Failed to get tag metadata for tags on: DATASOURCE ( All tags are invalid)
The message occurs despite the number of tags to publish being a non-zero number.
This is occurring when using either the Tag ... | Solution: The cause of the error is likely to be that the tags that meet the scan filter do not in fact have an associated map record. For example, assuming a custom tag called MYTAG is specified in the search scan filter and the tag's definition record does not have an associated map record, the following log can be e... |
Problem Statement: Data stored in an Aspen Reporting Framework (ARF) database can be viewed within a cube in Microsoft Business Intelligence Development Studio utilizing the Microsoft SQL Server Analysis Services. In turn this data can be viewed from any of the client machine to generate reports with different hierarch... | Solution: The different client applications that can be used to create reports are:
? Microsoft Excel:
Please refer the following knowledge base article for a detailed procedure on how to use Microsoft Excel to retrieve the data from the Aspen Reporting Framework database to generate reports
127625: How can I... |
Problem Statement: Register EDR components when the program starts up option doesn't work correctly on Vista Operating System as it needs to run the executable files(.exe) with Administrative privileges.
Note: This happens when multiple version of EDR components is installed in the same machine. | Solution: To solve the problem uncheck the Register EDR components when the program starts up option from the Tools | Program settings | Advanced tab for all the versions of EDR or you can run the EDR (Bjacwin.exe) by selecting Run as administrator
Keywords: Runtime error 430, Vista, Administrator
References: None |
Problem Statement: Is it possible to use CHEMISTRY without using the ELECNRTL property method? | Solution: It is possible to use CHEMISTRY without ionic species with other activity coefficient property methods; however, the true component approach should be used. There is no route for the conversion of apparent to true components (XTRUE) built into other property methods. To use another property method with the ap... |
Problem Statement: How can I choose a designed exchanger geometry from the optimization path? | Solution: Select one of the exchangers from the items and press the Select button. Note that the exchanger with the minimum cost or area is already select by the program and appears in the bottom of the table. After selecting the exchanger, go to Run on the main menu and click on ?Update the Geometry?.
Keywords: exchan... |
Problem Statement: What are the properties returned by a CAPE OPEN package created by Aspen Plus 12.1? | Solution: Constant Properties:
casRegistryNumber
iupacName
chemicalFormula
structureFormula
molecularWeight
CriticalTemperature
CriticalPressure
criticalVolume
criticalCompressibilityFactor
criticalDensity
acentricFactor
dipoleMoment
parachor
gyrationRadius
associationParameter
diffusionVolume
diffusionCoefficient
vand... |
Problem Statement: Can values for the infinite dilution activity coefficient (GAMINF) be reported by Aspen Plus and if not how can it be calculated? | Solution: Infinite dilution means such a large dilution so that when you add more solvent there is no change in concentration.
The concept of infinite dilution is used to study how substances are dissolved in solvents. Infinite dilution is an extrapolation method that tests aSolution's properties to see if they origina... |
Problem Statement: This knowledge base article explains how to change the update frequency of a plot in apenONE Process Explorer [a1PE]. | Solution: To change the update frequency of a plot in apenONE Process Explorer [a1PE]
1. Open the plot and select settings.
2. The update frequency setting is under the Timeline.
3. Set Update Frequency to the desired value.
4. Save the plot.
Keywords:
References: None |
Problem Statement: This Knowledge Base article provides steps to resolve the following aspenONE Search issues:
1. The search page does not load and the waiting “spinner” icon spins continuously.
2. The following error appears in the Process Data logs located at C:\Programdata\AspenTech\DiagnosticLogs\ProcessD... | Solution: The issue can be resolved by granting the Users group access permissions to the AspenTech folder in IIS at the following location
C:\inetpub\wwwroot\AspenTech
The Users group should be granted the following permissions:
· Read & Execute
· List Folder Contents
· Read
Keywords: None
Refer... |
Problem Statement: How do I input a helical fin type in Aspen Shell & Tube Exchanger | Solution: The shell type for the heat exchanger must first be set to an X shell that can be set from Input > Exchanger Geometry > Geometry Summary > Geometry tab
Now from the Input > Exchanger Geometry > Tubes > Tubes tab, for the Tube type, “Other (radial fins) can be selected.
From the Fins tab, the type of radial f... |
Problem Statement: This Knowledge Base article shows how to integrate any object, such as a waterfall diagram, in an IP.21 Process Browser graphic and then display it in aspenONE Process Explorer (A1PE). | Solution: Graphic Studio has a new frame object that allows HTML inline frames to be embedded within a graphic page and a URL specified for that frame.
So any page, including the trend control, can now also be placed in a graphic using the frame object and entering the URL for it prior to publishing to a1PE.
Fo... |
Problem Statement: How do you ensure a good distribution of the shell side fluid in an X type shell? | Solution: There are several things you can do to ensure better distribution of the shell side fluid in an X shell.
1. Use multiple inlet and outlet nozzles: The default is one inlet and one outlet nozzles. You can specify multiple inlet and outlet nozzles. You can specify the distance from one to the other.
2. Use Supp... |
Problem Statement: What is the difference between the Number of U-tubes on TEMA sheet and the total number of U-tubes in the U-Bend Schedule? | Solution: U-bend Schedule number of U-tubes is based on the Tube Number (layout) and the Number of U-tubes on the TEMA sheet is based on number of tubes specified by user Tube Number (Calcs.).
The Tube Number (layout) is the total number of tubes estimated by the program and Tube Number (Calcs.) is the total number o... |
Problem Statement: Where can I specify the weir height for a Kettle Reboiler? | Solution: The users can enter the height of the weir above the top of the bundle for a kettle reboiler. This can be specified in the Heat Transfer form via Input | Program Options | Thermal Analysis. A screenshot of this form is shown below.
The default weir height is zero that is the top of the weir is level with the ... |
Problem Statement: Why is the effective surface area per shell not changing when the No tubes in Window option is selected? | Solution: Heat Transfer Area per Shell is calculated by PI(3.14) * tube OD * tube Length * Number of Tubes Per shell.
For the overall area you would have to multiply this number by the Number of Shells in Series and Number of Shells in Parallel.
If a tube count is specified in the exchanger geometry Aspen Shell & Tube ... |
Problem Statement: Why are the tubes in the Tubesheet Layout in grey color? Normally they are white. | Solution: If you right-click the Tubesheet Layout diagram, a context menu appears with printing and drawing options, such as drawing tubes as crosses rather than circles. If the Display Details option is unselected then the tubes will appear in grey color. To make them as while color select Display Details option.
Keyw... |
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