question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Aspen Shell & Tube exchanger V7.3.1 does not solve in Aspen HYSYS V7.3 with Input error 1124 The data input for E-Shell inlet nozzle loc.
It happens with E-shell and D-shell case files built prior to EDR V7.3 integrated in HYSYS. When you load the old HYSYS models in HYSYS V7.3 you will see the messa... | Solution: For an E shell, to set the flow to be counter or co-current, then from Input | Exchanger Geometry | Shell/Heads/Flanges/Tubesheets | Shell/Heads tab the E shell flow direction (inlet nozzle location) is used to set the location of the inlet nozzle. If it is set to;
Near rear head then the flow direction of t... |
Problem Statement: This knowledge base article describes how to access Microsoft's FileSystemObject object model through Aspen SQLplus COM objects. The FileSystemObject object model contains properties, methods and events which allow manipulation of drives, folders and individual files. Before the FileSystemObject mode... | Solution: The following example code works for version 4.0.1 and later, but must be used for versions prior to v2004. In addition, when the following code is used, the user must add a reference to the following two objects within the Aspen SQLplus Query Writer (View |
Keywords: COM
object
manipulate
access
read
timesta... |
Problem Statement: How can I write an SQL query to scan through trend values to detect and report a change? | Solution: Sample query provided.
-- select ip_trend_value, ip_trend_time from testpv;
StartTime = TIMESTAMP'2005-02-23 14:11:56';
EndTime = CURRENT_TIMESTAMP;
ChangeFrom = 0;
ChangeTo = 100;
write 'Start Time: ' || StartTime;
write 'End Time: ' || EndTime;
LastTime = StartTime;
LastValue = -9999;
... |
Problem Statement: In Aspen Exchanger Design & Rating (EDR), user can see tube length actual and tube length effective under Results | Mechanical Summary | Exchanger Geometry | Tubes tab. This is calculated on the basis of user's input for the type and size of the front & rear Tubesheets and tube projections from front... | Solution: For Tubesheets, you can specify the require tubesheet type and desired thickness under Input | Exchanger Geometry | Shell/Heads/Flanges/Tubesheets | Tubesheets tab. Program will then evaluate the effective tube length = Actual Tube length - Tubesheet Thickness (front & rear) - Tube projections (from front & r... |
Problem Statement: Unhandled exception error when executing an INSERT statement on remote table in a relational database. | Solution: The problem is that the databases.dat file is missing from the %SETCIM%\sql folder.
Make sure this file exists and that the SETCIM environment variable is pointing to the correct path.
(drive:\Program Files\AspenTech\InfoPlus.21\db21)
From version 2004 (7.0) and later, there is a better error message:
Failed ... |
Problem Statement: How do I change the disk space for the temporary files? | Solution: You can change the disk space by going to Tools | Preferences | Advanced tab
Keywords: space, crash, disk, temporary, files
References: None |
Problem Statement: Do you have a list of input and result variables for the EDR programs? | Solution: All input and result variables can be seen in the EDR (Exchanger Design and Rating) User Interface by visiting the form and going to View>>Variable List (see below)
However you will not be able to copy multiple variables from this variable list window.
If you want to see the variable list in a spread sheet fo... |
Problem Statement: Horizontal thermosyphon reboilers normally consist of a G or H shell, where boiling of the process fluid takes place on the shellside, with the heating usually being supplied by process stream although any convenient hot product (vapour or liquid) may be used.
G and H shells have a longitudinal baffl... | Solution: describes how the default values used by the program are determined.Solution
The longitudinal baffle must not come very close to the section ends as this will increase the pressure drop through the unit. It is common to ensure that the total turn round cross flow areas are at least equal to;
outlet nozzle are... |
Problem Statement: Within Aspen Shell and Tube Exchanger, different Simulation calculations can be performed, where based upon the geometry supplied for the exchanger, the following parameters can be determined;
Outlet temperature (and quality) - default
Inlet temperature (and quality)
Flow rate
In each case, the two p... | Solution: explains how the different Simulation options can be set and when they might be used.Solution
From Input | Problem Definitions | Application Options the Calculation mode can be set to Simulation, where the Simulation calculation input for both the Hot and Cold Side are then active.
The conventional Simulation... |
Problem Statement: What is the logic for the default bonnet dimensions determination? | Solution: The front head (bonnet) dimensions default to (can be changed in Shell & Tube Mechanical):
-Cylinder length = 40% of shell diameter
-Plus elliptical head depth (shell diameter/4) plus head straight length
The nozzle elevation defaults to:
-Minimum nozzle cylinder length (function of nozzle diameter)
Shell... |
Problem Statement: How does Aspen Shell & Tube Exchanger treat the number of baffles specified in a I, J and G shell types? | Solution: For I, J and G shells, it is assumed that there is always a central baffle. The number required is the total number of baffles in both shell side passes including this central baffle.
If you specify an odd number of baffles, for example 19 baffles, then 1 is central baffles and 18 are regular baffles with 9 b... |
Problem Statement: The ?ASME? material database being used in EDR programs may not be the latest version, or the version that the user prefers. The material list and/or material properties between different annually published versions could be slightly different.
Below describes how to find out which version of the A... | Solution: To set the ASME material database, from the top of the program menu go to Tools | Program Settings | Files tab. At the bottom of the form, you can see ?ASME material database? that can be set from the drop-down list.
After selecting the ASME material database, click ?OK?. Now the corresponding ASME material... |
Problem Statement: In which baffle cut orientation does a triangle face upward or sideways with 30 degree triangular tube pattern? | Solution: A triangle top in a 30 degree triangular tube pattern faces up when the baffle cut is horizontal. It faces sideways when the baffle cut is vertical. The triangle top faces the shell the side flow. Shell side fluid flows up and down when baffle cut is horizontal. It flows sideways when the baffle cut is vertic... |
Problem Statement: When we specify two or more exchangers in series, which one of the below configuration is correct? | Solution: Configuration in Figure 1 is correct. It means that the heat exchangers are not identical in terms of the shellside flow to the tubeside pass history.
To Check this you can look to the temperature profile. Go to Result | Calculation Details | Analysis along Tubes | Plot tab. For example in below case, hot str... |
Problem Statement: For the same exchanger in Checking/Rating mode, one may see different clean area ratio after entering non-zero fouling factors. What causes the clean area ratio to be different? | Solution: When the program is run with fouling factors, the clean area ratio is derived by scaling the dirty area ratio, assuming that the fouling is removed, and the shellside and tubeside mean coefficients remain the same. The mean coefficients are calculated using the temperatures on the fouling surfaces.
When the p... |
Problem Statement: How many nozzles are allowed to be used for each heat exchanger shell? | Solution: The number of nozzles depend on the geometry of the exchanger and of the shell selected. The shell configuration is based on TEMA standards so they cannot be modified to have non-conventional configurations.
The following table summarizes the number of nozzles that each shell can allow:
Shell type
Inlet noz... |
Problem Statement: A Button named ''Enable numerical conversion'' can be found above the main window diagram of all the Aspen EDR applications. What is this button used for? | Solution: This button is designed for users' convenience when they want to change the units of some parameters WITHOUT converting the numerical values.
The button is set as being pushed (slightly grey compared to the diagram background) already by default. This means the numerical conversion is enabled. If a user cha... |
Problem Statement: How can I specify number of tubes plugged in each pass? | Solution: In V7.1 and earlier versions, Aspen Shell & Tube exchanger used to allow the user to specify total number of tube plugged and in calculations each pass is assumed to have symmetrical number of tubes plugged. But, starting with V7.2, User can specify the number of tubes plugged in each pass individually. Follo... |
Problem Statement: In some circumstances, when generating the physical property data using the Aspen Properties databank, and entering the components directly into Aspen Exchanger Design and Rating (EDR) you may notice that the enthalpy reported is zero at a number of temperature points. When the case is run this gener... | Solution: Instead of using the Property Methods tab form the Input | Property Data | Hot/Cold Stream Compositions, the Advanced Options tab should be used instead to read an external Aspen Properties (APRPDF) file that contains information on the components, the property methods and temperature ranges for the flash cal... |
Problem Statement: What is the maximum amount of property information that can be imported from Aspen HYSYS into Tasc+? | Solution: It is currently possible to import up to twelve data points when bringing process and property information from Aspen HYSYS into Tasc+ due to the data structure limitation in Aspen TASC (i.e. the precursor to Aspen Tasc+). Although Aspen Tasc+ can accept up to twenty-four input data points, the import feature... |
Problem Statement: What tube rows are checked for the HTFS vibration analysis when double segmental baffles have been specified? Which of the two overlap sections are taken into account? | Solution: As can be consulted onSolution ID 125368, the tube location taken into account for the vibration analysis is named as follows:
# 1 - Top Tube Row in Bundle
# 2 - First Tube Row Outside Baffle Overlap
# 3 - Top Tube Row Inside Baffle Overlap
# 4 - First Tube Row Inside Baffle Overlap
# 5 - Bottom Tube Row in B... |
Problem Statement: When there is no history data available, a SELECT statement which selects from the history repeat area will return No rows selected. For example, all the query statements below will return No rows selected if there is no history data available.
SELECT name, ip_description, ip_trend_time, ip_trend_val... | Solution: There are a few methods whic will enable the data from the fixed area to be automatically returned when no history data exists.
Method 1: With the help of a flow control construct.
IF (SELECT COUNT(ip_trend_value) FROM tagname) = 0 THEN
SELECT ip_description, '' ip_trend_time, '' ip_trend_value from tagname... |
Problem Statement: When querying a tag's values using SQLplus, asterisks are returned instead of the numeric values For example:
select ip_trend_value, ip_trend_time from ip_analogdef where name like 'xx.pv'
might return the following results:
ip_trend_value ip_trend_time
-------------- --------------------
***********... | Solution: SQLplus only displays up to 6 digits to the left of the decimal. To work around this, use a specific format record when selecting the values. For example:
SELECT ip_trend_value USING 'F22.11' FROM ip_analogdef where name like 'xx.pv'
Or
Use the CAST function to cast the values as a char (character string) to ... |
Problem Statement: You cannot install an ACM Model .MSI file from a drive created using the DOS subst command.
The installer will fail with the message The installation was interrupted | Solution: Don't install from a drive created with DOS subst command. Copy the MSI file in another location.
This is a limitation with the Microsoft Windows Installer, not a deficiency in our software. Unfortunately the fact that it is Microsoft software at fault means that we cannot provide a more helpful error message... |
Problem Statement: This | Solution: s contains instructions on how to interrogate the wmi interface from SQLplus.
Solution
This example will lookup user information using Windows Management Instrumentation (WMI).
local strComputer, wql;
local objWMIService, Locator, Service;
local results, userData;
strComputer = '.';
Locator = CreateObje... |
Problem Statement: The objective is to calculate the maximum between an element of an array and a particular set value and then place the result in the corresponding element of a new array.
Basically something like:
xnew(1) = MAX(x(1),xset);
xnew(2) = MAX(x(2),xset);
xnew(3) = MAX(x(3),xset);
...
xnew(N) = MAX(x(N),xse... | Solution: MAX is a mathematical operator that returns a scalar from its arguments, i.e. in the case above where the code is written implicitly, there will be N equations generated for each element of xnew for which the value is calculated from the maximum between all elements of array x and the scalar xset. This will b... |
Problem Statement: How to run a query in AspenTech SQLplus to get data from a SQL database. | Solution: A SQL database can be queried using SQLplus.
The SQL database has to be set up as a datasource. This can be done by doing the following:
1. Go into Start/Settings/Control Panel/ODBC Data Sources.
2. On the ODBC Data Source Administration dialog box, select the System DSN tab. Click on Add.
3. Select e... |
Problem Statement: Trying to use an .appdf created with an Aspen Plus run that includes a user kinetic subroutine, the following error messages are issued when loading the acmf in ACM
Properties >> ****TERMINAL ERROR
Properties >> COULD NOT OPEN DLOPT FILE:
Properties >> dlopt.opt
Properties >> ****TERM... | Solution: In fact the ACM run does not even use these routines. So the best action is to go back to Aspen Plus bkp, remove the user kinetic, and regenerate the appdf file.
The otherSolution is to copy manually the dll and the dlopt.opt file in ACM simulation working folder (e.g. AM_simulation_name).
A similar problem o... |
Problem Statement: When an Aspen SQLplus query is run against a MS Microsoft Access database, the query locks the database, preventing other queries of MS Access from executing properly. Re-starting InfoPlus.21 successfully unlocks the MS Access database until another query of MS Access is run. | Solution: Aspen SQLplus includes an option on the SQLplus database link dialog box to Disconnect on any error. Setting this option will reconnect you to any database type on any error, not just errors that SQLplus recognizes as network failures.
To set the option:
1. Click the button on the toolbar in the SQLplus Q... |
Problem Statement: Can you explain which changes are required in the code of a flowsheet VBscript to be used within a macro in Excel? | Solution: When you run a flowsheet script, any method you invoke is automatically applied to the flowsheet object (because the script is invoked within the flowsheet).
When you invoke a method in Excel, the same happens, but this time the default object is Excel, not ACM anymore.
This is why when you do this in a VBScr... |
Problem Statement: How to invoke library scripts? | Solution: To invoke a script that is in a library script's folder, use InvokeLibraryScript. This takes the name of the library as the first argument and the name of the script as the second argument, for example:
Flowsheet.B1.InvokeLibraryScript Custom Modeling, LibraryScript
If the library is given as an empty string ... |
Problem Statement: Is it possible for a query to return the total number of data points in history for InfoPlus.21 tags? | Solution: One possible way to return the total number of data points for a tag is to COUNT the IP_TREND_TIME field of the repeat area for a tag. The other possibility is to return the maximum occurrence number (OCCNUM) in the repeat area of a tag.
In most cases, the values returned by MAX(OCCNUM) and COUNT(IP_TREND_VAL... |
Problem Statement: How can I copy the specification or value from one block to another? | Solution: One option is to use a script and the RegExp vbscript object. Let's say for example you want to copy the specifications of B1 into the specifications of B2, you can use this:
on error resume next
for each v in B1.FindMatchingVariables(~)
if not v.IsParameter then
txt = v.name
set re = new RegExp
... |
Problem Statement: When I invoke a script such as:
Example - script called report:
set report = CreateObject(...)
.
.
this error message appears:
Error in script report at line 11, position 1: Cannot assign to Report
What does this mean and how to avoid the error? | Solution: The problem is that the script is also called report. So when you try to access the variable report the script actually accesses the script object report.
In fact any object with the same name as a VBScript variable will cause this problem, including block names, tasks, tables and plots.
To prevent the confli... |
Problem Statement: When creating an SQLplus database link to an Oracle database, the following error occurs:
However a System DSN has already been created to the Oracle database using Oracle ODBC and the connection was already tested as successful. Furthermore, using Microsoft Excel to perform a database query usin... | Solution: This is usually caused by the System Environment Variables not being set properly. To check on the System Environment Variables,
1. Right-click on My Computer.
2. Select Properties from context menu.
3. Click on the Advanced tab.
4. Click on the Environment Variables button.
5. Look for th... |
Problem Statement: This sample program shows how to create a simple .NET Windows application that uses the .NET OdbcDataAdapter object to read data from InfoPlus.21 using SQLplus. | Solution: Follow the steps below to create the application. The code is also attached to the knowledge base article.
Launch Microsoft Visual Studio .NET
Select File | New | Project
Select a Project type of Visual C# Projects
Select the Windows Application Template
Type a Project Name and click OK
An empty Windows Form ... |
Problem Statement: This knowledge base article describes how to save query results to a csv file or Excel sheet. | Solution: The following query will create a file called OutTest.csv which contains a single sheet called 'OutTest'. Files of type '.csv' can be opened with Excel. The resulting file will be created on the InfoPlus.21 server, not the client PC that is running SQLplus.
The results of the subsequent select statement will ... |
Problem Statement: This knowledge base article describes how to send e-mail with multiple lines of text in the body of the e-mail using an Aspen SQLplus query. | Solution: Be aware that in order for the code to work, it will be necessary to obtain and install an application that is able to send e-mail messages from the command line (such as IndigoMail available from the following website http://www.indigostar.com/indigomail.php ). In addition, make sure to include a reference t... |
Problem Statement: How is the standard deviation computed for a histogram plotted in Aspen Real-Time SPC for Process Explorer? | Solution: Standard deviation for a histogram chart is calculated using the sample mean. The main assumption here is that the data selected for the given time range is a sample of the population. The sample standard deviation is an estimate based on a set of numbers.
The formula for calculating the estimated standard... |
Problem Statement: This knowledge base article describes how to use InfoPlus.21 record-level security to restrict the availability of SQLplus web reports to users based on the user's InfoPlus.21 access level. | Solution: The SQLplus reports do not contain functionality to restrict access to the reports based on user roles. The public reports are available for all users and the private reports are only available to the users who created them. However, for every SQLplus web report which gets created, there is a corresponding re... |
Problem Statement: Why do I not see a RhoV2 violation warning for Shell side Inlet nozzle when I have RhoV2 value more than the TEMA standard limit? | Solution: In Aspen Shell & Tube Exchanger program, users can check the RhoV2 analysis in Results |Thermal / Hydraulic Summary | Flow Analysis tab where the RhoV2 values are reported for the shell Inlet nozzle, shell entrance, bundle entrance, bundle exit, shell exit and shell outlet nozzle. You can find the correspondi... |
Problem Statement: I want to use Turbo-BIII, a kind of Wolverine tube. Where can I input data in Shell & Tube Exchanger? | Solution: You can input data for Turbo-BIII as follows:
1. Select Tube type: Internal enhancement
2. Select ?Wolverine Turbo: Any? as the tube internal enhancement
3. Select a tube outside diameter and nominal wall thickness from the document, http://www.wlv.com/documentation/TurboBIII.pdf.
4. ... |
Problem Statement: When I run a case with a X shell under Rating/Checking, the cumulative heat load is not displayed in the Calculation Details results, as shown in the image below: | Solution: The cumulative heat load, as displayed in the Stream details, is really only well defined for serial pass axial flow exchangers, which have a :;D calculation grid. With X-shells with 2:D grids, the definition becomes dependent on the grid size and on its definition. In the Standard method all intensive parame... |
Problem Statement: Low area ratio is observed in V7.3.2 for multiple shells in series with U-bends. Is there a work-around? | Solution: The problem occurs observed in V7.3.2 only with advanced method and when
(1) there are Multiple shells and
(2) heat transfer in U-bend is switched off and/or
(3) blanking baffle is specified.
Work-around 1: Use standard method forSolution.
Work-around 2: If you want to use advanced method, turn on heat ... |
Problem Statement: How to troubleshoot ACM exported model (MSI) file installation? | Solution: If you are having problems installing a .MSI file, you can create a log by executing the following command in a DOS box:
msiexec /Id:\MyModel.msi /Lvoicewarmup! d:\info.log ALLUSERS=1
Substitute d:\MyModel.msi with the name of your MSI file, as well as the location of the log file as appropriate.
You can then... |
Problem Statement: This knowledge base article provides an example of how to call a procedure or a function from another procedure or function. This script also demonstrates how to call a function using input parameters. | Solution: -- Beginning of Script
--User kicks off script by calling procedure UseGBF.
--Procedure UseGBF then calls fcn GoodBadFlag (and passes the time
--parameters to GoodBadFlag).
--GoodBadFlag does a tag select then returns the value of the
--select to the calling procedure.
--The calling procedure then displays th... |
Problem Statement: A customer wanted to analyze history for various tags with the goal of outputting a sequential report that would list the start and end time a tag stayed in a particular state (like good or bad.) How is this problem solved using SQLplus?
How to list Start and End time for a sequential period with the... | Solution: The sample code will output Start and End time for a sequential period with the same status
Change StartTime to the oldest time you need to include
Change machine state.1 to the correct record name
Keywords: None
References: None |
Problem Statement: A runtime parser error can occur when calling a proceduredef record which contains a cross BY query. The following error message is seen:
Column or Variable %%%% is not found.
Below is an example from a customer when using a for loop with a select query:
for (select ts, max(value) by name from histor... | Solution: The problem is that the parameter is not evaluated at the time that the procedure is parsed, so the cross by query has no data and so no columns. You can get around this by explicitly selecting columns from the cross by query. See below:
for (select ts, 'tag1','tag2','tag3','tag4','tag5' from
(select ts, max(... |
Problem Statement: It is possible to add Aspen InfoPlus.21 (IP.21) as a Linked Server in Microsoft SQL Server using the Aspen SQLplus ODBC driver. For information on how to set this up as a linked server refer to | Solution: 116533. If security is enabled on the InfoPlus.21 database, the SQL tool initiating the connection can receive an Access Denied error message.
To prevent Access Denied errors, which account should be granted permission?Solution
Linked Server connections are made via the account that starts the MSSQLSERVER ser... |
Problem Statement: The Aspen eBRS product (AeBRS) uses a Relational database in which the Timestamp values are stored in a UTC (or GMT) format rather than as local timezone timestamps.
The client tools provided as part of AeBRS have been developed so that they internally convert the UTC timestamps so that they then dis... | Solution: After communications with AspenTech Support, Jerry Sandoval of Dow Chemical developed such an Sqlplus function, and gave AspenTech permission to publish this in his name as follows:
-- Function: UTC_To_Local_Time
-- Description: Adjust UTC format Timestamp to Local Timezone Timestamp.
-- Automatically accou... |
Problem Statement: When double-segmental baffles are used in Aspen Shell & Tube Exchanger program, users can specify baffle cut inputs on Input | Exchanger Geometry | Baffles/Supports | Baffles tab. Corresponding outputs (actual, nominal in diameter, actual in area) are reported on Results | Mechanical Summary | Exchan... | Solution: The ''inner baffle cut'' of double-segmental baffles in the Shell&Tube Exchanger program is measured from the shell central line to either side of edges of the two pieces of outer baffles. The ''outer baffle cut'' of double-segmental baffles is measured from either side of the edges of the inner baffle piece.... |
Problem Statement: The baffle spacing or pitch is the distance between centers of adjacent baffles. The value can be entered into Aspen Shell & Tube Exchanger for the spacing (center-center) under Input | Exchanger Geometry | Geometry Summary | Geometry tab or Input | Exchanger Geometry | Baffles/Supports | Baffles tab... | Solution: describes how the upper and lower baffle spacing limits are determined.Solution
The minimum baffle spacing is given as in TEMA RCB-4.51 which is 2 inches.
The maximum baffle spacing is arbitrarily set to the shell inner diameter.
It should be noted that the maximum baffle spacing is not determined by TEMA RCB... |
Problem Statement: When running the aspen shell and tube program I receive the following error message: The data input for Cold liq/vap-only out noz is unacceptable | Solution: This error refers to the shell side's outlet nozzle specifications.
Aspen Shell and Tube Exchanger requires a kettle to have separate nozzles for liquid and vapor outlet.
The error is displayed if you choose no for Use separate outlet nozzles for cold side liquid/vapor flows. (Input || Exchanger Geometry ... |
Problem Statement: It is possible to have different duties in each half of an I or J shell due to the temperature profiles? | Solution: In Aspen Exchanger Design & Rating (EDR),you can run the simulation case in Advanced Calculation mode under Input | Problem definition | Application Options so that program performs rigorous calculations based upon the geometry.
For an I or J shell, the shell side inlet fluid is split so that for an I shell,... |
Problem Statement: Can I specify the size, layout, and number of rows of impingement rods in Aspen Shell & Tube Heat Exchanger program? | Solution: Yes from V7.2 version user can specify the size, layout, and number of rows of impingement rods, and they appear on the Tube Layout diagram.Impingement rod layout options include matching the underlying bundle layout or layout angles of 30, 45, or 90 relative to the inlet nozzle.
Keywords: impingement rods, i... |
Problem Statement: What are the definitions for tube length and number of tubes for a U-tube exchanger? | Solution: For a U-tube exchanger, the tube length and number of tubes are defined as follows.
Tube Length: This is the length of the straight section of the tube from the end at (or projecting beyond) the tube plate to the beginning of the U-bend where the tube begins to bend.
Number of Tubes: Total number of holes in ... |
Problem Statement: In Aspen Shell & Tube Exchanger you may see the message ?Operations Warning 1671: The ratio of actual temperature difference to the temperature difference for pure counterflow is less than 0.75. It is not usually advisable to design or attempt to operate shell and tube heat exchangers at this conditi... | Solution: The above message is referring to the rule of thumb which suggests that you should not design a shell and tube heat exchanger where the Log Mean Temperature Difference (LMTD) correction factor (Ft) is less than 0.75. Although Shell & Tube Exchanger does not use the LMTD, a low Ft correction factor does have a... |
Problem Statement: From the Exchanger Design and Rating (EDR) programs, from the Results | Calculation Details | Analysis along Tubes | Interval Analysis tab, the local temperatures are shown along the length of the exchanger. One column is labelled as the metal temperature, where the | Solution: lists the definitions of this column.Solution
In Shell and Tube the tube metal temperature is at the mid point of the tube wall.
In Air Cooled Exchanger the metal temperature is at the inner wall.
Keywords: Interval Analysis, Metal Temperature
References: None |
Problem Statement: ??OUI?O>I??cAOEIO??a?oAspen EDR?I?o????????E?#?EEDRI??e>oIA??#?>a??>i?i?o????OU'E>u??EI?AEDR????!#
?OO???O?>?A'E??a?U?>????#?OoI??i?o?????A?????>O>??EC??C?Eu/EyIeE?O??A????!#?a?EE?O?>????e??Start|Program Files|AspenTech, EO???O??IeO??A??????E??I?oI??e#???E??I?oO??o#??EDRIA??IIEe?I?o?c??Ai#?>o????File... | Solution: O??A?aEDR?i?Y??E??AA???#?Au?eO?
-'o??Windows Explorer
-??Tools|Folder options|File Types
-?!O?EDRI??e#???>?Advanced
-??>?Edit, E>?o??>?Browse
-OU'E??Io'??UIA#??O??EDR?I?o?A????IA????#?O?O?O??O?OAuIeO??A????#?
-?!O?bjacwin.exe (??Oa#?ECO-IA??#????>EC???'>o???i?Y??E?)
-??>?OK, OK, OUOK
IOOU#??a?oO????AEDR... |
Problem Statement: Why Aspen Shell & Tube Exchanger predicts different duty and temperature than Aspen HYSYS? | Solution: Aspen HYSYS solves a heat exchanger in simulation mode. If the calculation mode in Aspen Shell & Tube Exchanger is not simulation, then you may observer different duty and temperature. For example, you are running Aspen Shell & Tube Exchanger in rating mode and have 10% excess area. Aspen HYSYS will run the s... |
Problem Statement: There are times where after specifying an exchanger configuration, or my number of tubes, or the nozzle diameter, this information is not reflected on my TEMA sheet and EDR does not seem to be taking this into account. | Solution: Go to Input | Exchanger Geometry | Geometry summary and verify that you do not have the option Use existing layout under the Tube layout section.
When this is selected, the program will only take into account the geometry that has already been calculated and will not update with the new geometry that you spec... |
Problem Statement: Why is the font color of the few properties white and the background color is dark red? | Solution: The white color font or burgundy - dark red color background serves as a warning. If a user input or overwritten property value is out of usual range then this warning is issued. For example, if the vapor specific value is higher than 1.2 BTU/(lb*F), then this warning is issued. If the values are correct then... |
Problem Statement: TEMA sheet line 6 is inconsistent with line 42 for a shell ID.
For example, a shell ID of 7.981 inch is reported as 7 inch in line 6 and 7.981 inch in line 42. | Solution: TEMA sheet line 6 by definition is a unit label displaying the shell ID. This value is typically a whole number (not exact) in inches. Thus an 8-5/8 inch OD unit with 102 tube length will be 8-102 if the ID is > 8.0 and 7-102 if the actual ID is < 8.0.
The value on line 42 is typically the actual ID used in... |
Problem Statement: When generating the properties of a stream in EDR products, how to accurately model the solubility of Non-Condensable components such as CO2, CO, N2, H2S, Methane, HCN, NH3, H2 etc. in liquid phase. | Solution: Using Aspen Properties as property package and activity coefficient model such as NRTL or UNIQUAC as property method in EDR products one can generate the stream properties accurately. Aspen properties will perform VLE or VLLE calculations in the background based on the binary interaction parameters for each c... |
Problem Statement: After successfully running an EDR case, the user will be directly navigated by default to the ''Warning & Message'' tab. Users may prefer different forms, such as ''Optimization Path'' ''TEMA Sheet'' etc, depending on their specific engineering objectives of using the program.
Described below is how ... | Solution: To set the first Results form displayed after run, from the top of the program menu, go to Tools | Program Settings | UI Options 2 tab, where you will see for each application there is a drop-down list allowing users to select which result form they want to view first after running a case. These forms for She... |
Problem Statement: 同一个EDR文件可以包含不同的换热器模块程序，也可以在同一时间打开、调整不同的模块。解决方案130400 讲述了怎样用 '自动传送' 功能从管壳换热器模块传送过程参数，和几何参数（只限于机械模块），到管壳换热器机械模块、空冷换热器或板纹式换热器，并用此功能打开相应的模块窗口。本解决方案讲述的是怎样在同一EDR文件下，手动建立、调整，和保存不同的换热器模块于同一EDR文件里。 | Solution: 两种方法手动建立、调整，和保存不同的换热器模块于同一EDR文件里：
1. 当从空白新建一个EDR文件时，用户会看到以下界面。
从此界面，用户可以选择他/她后期想运行和保存于同一EDR文件下的不同换热器模块。多个模块可同时被选择。例如 ，要在此EDR文件里打开、运行和同时保存管壳换热器模块传，和管壳换热器机械模块、空冷换热器及板纹式换热器，用户应该选择如下。
用户会看到此四个模块被同时打开。
用户现在可以同时在这个不同的模块的窗口里进行操作。
第二种方法：当用户已经打开并处于某一模块的界面下时。
2. 在此情况下，用户可以直接点击位于程序界面上方的相应换热器模块按键，直接... |
Problem Statement: 在Aspen EDR程序里，用户在程序界面的顶端菜单里能找到File | Description选项。它是用来做什么的？它和程序内部Input | Problem Definition | Headings/Remarks选项的区别是什么？ | Solution: File | Definition选项和Input | Problem Definition | Headings/Remark界面的输入界面是一样，但是它的信息不会在程序的TEMA参数报表里体现出来。
如果用户在Input | Problem Definition | Headings/Remarks界面写入任何信息，相应的同样的信息会在输出项的Results | Results Summary | TEMA Sheet 界面被即时更新，得以体现。但是在File | Description选项里输入的信息不会就被反映到结果输出的Results | Results Summary | TEMA Sheet表格里。... |
Problem Statement: Aspen Shell & Tube Exchanger has two different vibration methods; HTFS proprietary and TEMA. Details of the HTFS methods can be found from the HTFS Research Network at http://www.aspentech.com/htfs/resnet.asp and the TEMA methods from the Standards of the Tubular Exchanger Manufacturers Association h... | Solution: From Input | Program Options | Methods/Correlations | General tab, the Vibration analysis method can be set. The options are;
Full HTFS analysis
Simple TEMA analysis
HTFS and TEMA analysis.
When the case is run, the vibration results can be viewed from Results | Thermal/Hydraulic Summary | Vibration & Resonan... |
Problem Statement: The Exchanger Design and Rating (EDR) program can be linked to Aspen HYSYS for the detailed calculation of Shell and Tube Exchangers.
Normally from a Heat Exchanger object in HYSYS, the EDR program can be selected from the Design tab under Parameters from the Heat Exchanger Model drop down list. Once... | Solution: describes how it may be set, assuming that you have both HYSYS and EDR V7.20 installed on the computer.Solution
Registry settings are used for the two programs to see one another. The registry settings entries that are available may depend upon the order in which HYSYS and EDR have been installed. The followi... |
Problem Statement: In Input >Exchanger Geometry > Nozzles > Shell side nozzles, when any ASME option in nominal pipe size is selected, the actual ID shell side nozzle diameter value is not changing.
After running the file, the Input Error 1122 appears in Results > Results Summary > Warnings & Messages
How can I get... | Solution: When “use existing layout” option is used, nozzle sizes are locked in as well. This option needs to be changed to “new (optimum) layout”
To change this options, go to Input > Exchanger Geometry > Geometry Summary
Select New ( Optimum) layout from the Tube Layout dropdown list
Keywords: Input Error 1122, nozzl... |
Problem Statement: Can a vertical flooded evaporator be designed using Aspen Shell & Tube Exchanger? | Solution: A vertical flooded evaporator is usually used in large ammonia systems. One of the current limitations of Aspen Aspen Shell & Tube Exchanger is creating vertical flooded evaporator with BXM geometry. Currently Aspen Aspen Shell & Tube Exchanger can handle horizontal flooded evaporator with BXM geometry.
A
Key... |
Problem Statement: Why is the allowable number of baffles too low? | Solution: Allowable number of baffles is calculated on the basis of tube length and baffle spacing. If you observer Aspen Shell & Tube Exchanger (formerly Aspen Tasc+) is allowing too few number of baffles, you might have specified too high baffle spacing, or too low tube length. Please check the values and units of ba... |
Problem Statement: Temperature Crosses: Possible and Impossible scenarios | Solution: The term ?Temperature Cross? can have a number of different meanings. Sometimes it relates to something that is physically impossible in a heat exchanger, sometimes it does not. Sometimes it simply imposes restrictions on the type of exchanger configuration that can be used.
To begin with it is useful to cons... |
Problem Statement: When I go to Results | Thermal / Hydraulic Summary | Flow Analysis, the Shell Side Flow Fractions on the table for the Flow Analysis do not add up to one.
 | Solution: The flow Analysis shows fractions of the shellside flow. The flow direction on the shellside due to the baffles is not pure crossflow, but a combination of cross flow and longitudinal flow. The departure from crossflow will depend upon the baffle spacing and cut. The flow is further complicated by manufacture... |
Problem Statement: Within the Exchanger Design and Rating Suite, EDR, different pressure units may be set on the individual input forms. In the versions older than V8.0, there is a units set of mmHq, which is a mis-type for mmHg (mm of mercury) that is also available.
If this unit is set, then the input file will load... | Solution: From EDR V8.0 onwards, this incorrect label for the pressure units has been removed. If files are to be transferred to EDR from older versions, then it is recommended that first all pressure units are re-set so that mmHq is not used. The simplest way to achieve this would be to globally change the units of ... |
Problem Statement: We know the patches (if applicable) for various versions of Aspen Exchanger Design & Rating (EDR) programs can be found on AspenTech support website at http://support.aspentech.com Is there any shortcut to access the summary page of all the patches available for Aspen EDR programs that have been rele... | Solution: All the released patches for Aspen EDR programs can be downloaded from Aspen support website. The normal route is to go to http://support.aspentech.com, click 'Patches' at the up-left corner of the page.
There is a shortcut, by going to the link below http://support.aspentech.com/webteamasp/My/FrameDef.asp?/w... |
Problem Statement: Why inlet baffle spacing is zero in design for U type bundle? | Solution: The default baffle spacing at inlet for U bundle is 0. It means the first baffle is at the junction of straight tubes and U bend. This is where the blanking baffle would normally be.
Keywords: U bend, U tube bundle, inlet baffle spacing, inlet, baffle spacing zero, 0
References: None |
Problem Statement: For a condensing stream, you should determine if your case is closer to integral or differential condensation. More condensate will be present at any given temperature with integral condensation versus differential condensation. In the heat exchanger design, this results in a higher mean temperature ... | Solution: The condensation type can be changed within the Property method Tab for the Hot Stream Compositions menu. This is valid when you select to retrieve the properties using the B-JAC database.
It should be noted that Aspen Shell & Tube Exchanger defaults to integral.
Integral condensation assumes that the va... |
Problem Statement: The flow of the shell side fluid can impart energy to the tubes in a heat exchanger that may cause them to vibrate.
The Tubular Exchangers Manufacturer Association (TEMA) Handbook 9th Edition in Section 6 presents a method for determining the flow induced vibration, where this | Solution: describes how the Fluid Elastic Instability (FEI) results presented may be interpreted.Solution
If the ?Simple TEMA Analysis? vibration analysis method has been selected from Input | Program Options | Methods/Correlations | General tab, then when a case in run, the Vibration performance is shown in Results | ... |
Problem Statement: In Aspen Shell & Tube Exchanger program, where can I find the local crossflow velocity values and crossflow fractions for detailed tube locations (as described in | Solution: 125368) in the inlet, mid-space and outlet regions of the exchanger?
Solution
The local crossflow velocities and corresponding crossflow fractions can be found on Results | Thermal / Hydraulic Summary | Vibration & Resonance Analysis | Resonance Analysis tab.
Scrolling the table to the right-hand side, ... |
Problem Statement: Like most AspenTech Engineering programs, when opening an existing EDR file, users can either choose to double-click the EDR file directly, or users can open an EDR program from scratch and navigate to the folder where the existing EDR file lies and select to open the file.
Or
When using the later me... | Solution: It is not necessary to open an application with the same application type as the existing EDR file. No matter which application users choose to open from scratch (i.e. Shell&Tube Exchanger, Shell&Tube Mechanical, Air Cooled Exchanger, Plate Exchanger, Plate Fin Exchanger and/or Fired Heater), the EDR program ... |
Problem Statement: Two phase flow in a horizontal tube can adopt many geometric configurations of the distribution between the liquid and gas phases, which are commonly known as a??flow patternsa?? or a??flow regimesa??.A
When subcooled liquid flows through a horizontal tube heated with a constant heat flux, the heat t... | Solution: In a heated tube the heat transfer and pressure drop are both dependent upon the flow pattern. Therefore, to predict these reliably, knowledge of the prevalent flow pattern is required. Flow patterns may be predicted from either;
Empirical flow pattern maps: Data collected from flow pattern observations may b... |
Problem Statement: The Tubular Exchanger Manufacturer Association (TEMA) sheet gives a document template, which shows the process conditions, stream physical properties and geometry of a heat exchanger. Given on lines 37 to 39 are the nozzle dimensions for both the shell and tube side.
This | Solution: describes how users may vary the nozzle dimensions shown on the TEMA sheet to be either based on the inner diameter (ID), outer diameter (OD) or the Nominal pipe size diameter.Solution
From the Input | Exchanger Geometry | Nozzles, users under the Shell side Nozzles or Tubeside Nozzles tab can specify the noz... |
Problem Statement: Cannot change baffle configuration after running a case in 7.2.1
Open the attached case v7.2.1: AM5-103C- test 7.2 not run.EDR
Run the simulation.
Go to Exchanger Geometry\Baffles and Supports and try to change the baffle type. Even when the software allows the user to select the different baffle ... | Solution: Improvement in 7.2
This is an X-shell. An X-shell has no (flow) baffles, it has support plates. The default baffle type is unbaffled
The baffle thickness is left accessible. The note at the bottom of the screen indicates that the thickness refers to baffle or support plates. No other baffle related iputs are ... |
Problem Statement: When using the Aspen Shell and Tube Exchanger program in design mode, from Input | Program Options | Design Options | Process Limits tab, the minimum and maximum velocities for the hot or cold side can be set.
In most cases only the minimum and maximum tube side velocity limits affect the design, sin... | Solution: describes the range of tubeside velocities normally used inside tubes, which can be limited due to erosion.Solution
Erosion is the deterioration of the tube surface due to the action of the fluid flowing over it can be intensified if the fluid contains solid particles in suspension. The following values are t... |
Problem Statement: How do I make the top of the triangle face up when I use a 30 degree triangular tube pattern with a vertical baffle cut? | Solution: There are two ways you can do it.
1. Use 60 degree rotated triangular tube pattern. Or,
2. Choose horizontal baffle cut. Make sure ?New (optimum) Layout? is chosen under Input || Exchanger Geometry || Geometry Summary || Tube Layout. Run the file. The triangle top will be facing up. Now, change Tube... |
Problem Statement: Cannot launch Aspen Exchanger Design & Rating by the error 430. | Solution: This is JapaneseSolution. Please see attached pdf file. (Japanese)
Keywords: Error
EDR
References: None |
Problem Statement: How do I transfer data from HTRI to Aspen Shell & Tube Mechanical? | Solution: Go to the main program menu, click on File and then Open. Choose the option HTRI output (*.DBO, *.OUT) in the Files of Type dropdown menu and click Open.
Keywords: None
References: None |
Problem Statement: In Aspen Exchanger Design & Rating (EDR) programs, from the top menu users can find File | Description option. What is it used for? What is its difference from the Input | Problem Definition | Headings/Remarks tab inside the programs? | Solution: The File | Description option has the same input interface as the Input | Problem Definition | Headings/Remarks tab where users can input notes/remarks/annotations like Company, Data, project reference etc, but it is not related or synchronized with TEMA specification sheet outputs.
If users specify anything ... |
Problem Statement: The Mass heat of vaporization reported in Aspen HYSYS may not match the latent heat values displayed in the Aspen Exchanger Design & Rating (EDR) results. You may find a latent heat value in EDR that is less than the Mass heat of vaporization for the corresponding stream in Aspen HYSYS. | Solution: The terms used in these two programs may be confusing. An explanation is shown below on how Aspen EDR determines the latent heat. 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 l... |
Problem Statement: One Exchanger Design & Rating (EDR) file can have multiple applications in it and user has the option to load these applications/sub-programs every time within the EDR file. | Solution: 130400 describes how to transfer process data from a Shell&Tube application into Shell&Tube Mechanical or AirCooled or Plate Fin application, and use this auto-transfer feature to open other applications. ThisSolution describes how to manually create multiple types of applications with different sub-programs ... |
Problem Statement: What is the meaning of Warning 1354: Flow reversal of liquid at the top of tubes is likely to occur since the Wallis dimensionless gas velocity is less than 0.5. You should consider a design revision to increase the tubeside velocity. | Solution: Here is the explanation of flow reversal.
a) At low gas flowrates the liquid falls down the tube as a film and flows out the bottom
b) As the gas flowrate is increased, waves are formed on the liquid film and it can be carried partly upwards from the point of injection. This is known as flooding
c) As gas vel... |
Problem Statement: Installing AES v7.3 and AES v7.2 caused the sytem to reboot | Solution: 1. Uninstall the Aspen SLM software and Aspen products from Add/Remove Program
2. Open Window Explore, and delete all Aspen folders on the C drive
3. On the Window Explore address field, type %temp% and hit enter key. Delete all the files and folders on the Temporary folder.
4. Using regedit, manually remove ... |
Problem Statement: In Aspen Shell & Tube Exchanger, you may notice the difference in unsupported span length and flow velocity for Resonance Analysis (HTFS) and Fluid Elastic Instability (TEMA). | Solution: You can view the Vibration & resonance analysis under Results | Thermal / Hydraulic Summary | Vibration & Resonance Analysis tab. Results are only available once the simulation run has been performed. This tab contains details of Fluid elastic instability & Resonance analysis performed according to HTFS metho... |
Problem Statement: How can I create a Tasc+ input template file? | Solution: A template file can be created in Tasc+ using the EDT extension. Create a standard Tasc+ input file and then save it using a *.EDT extension. Using this method, you can obtain a file with the geometry (size and type) and specifications without the process information.
Keywords: template, extension, file, inpu... |
Problem Statement: 是否可用Aspen Shell & Tube Exchanger 程序来模拟虚拟防冲管？如果可以，如何定义相应设定？ | Solution: 是的，Aspen Shell & Tube Exchanger 程序可以模拟虚拟防冲管。
首先，你需要到Input > Exchanger Geometry > Nozzles > Shell/Tube Side Nozzles 界面去设定''Yes impingement''。
然后你要到Input > Exchanger Geometry > Nozzles > Impingement 界面去定义''Dummy tubes''。
然后用户就可以在界面下方开始输入相应的dummy tube的参数设定，比如管行数。
Keywords: Chinese-
References: None |
Problem Statement: How does one accurately generate the properties of an Electrolyte system in a Heat Exchanger in Aspen HTFS+? | Solution: If there is an electrolyte system in your heat exchanger, Aspen Properties ELECNRTL is the recommended physical property method. ELECNRTL uses special density models to accurately predict the density of aqueous electrolyte systems, but without running ELECWIZARD inside Aspen Properties, the property method wi... |
Problem Statement: When running Aspen Shell and Tube Exchanger, you may see the Input error 1124 The data input for E-Shell inlet nozzle loc. is unacceptable.
This | Solution: describes what the error means and how can it be eliminated.Solution
For an E shell, to set the flow to be counter or co-current, then from Input | Exchanger Geometry | Shell/Heads/Flanges/Tubesheets | Shell/Heads tab the E shell flow direction (inlet nozzle location) is used to set the location of the inlet ... |
Problem Statement: Horizontal/Vertical pass partition width how it is defined? Is it centre to centre of the tube holes on the tube sheet? | Solution: The Horizontal/Vertical pass partition lane width is measured from tube outer surface to tube outer surface (plain tube outer surface, ignoring any fins).
Keywords: width, pass, partition
References: None |
Problem Statement: How can someone specify the U-bend radius? | Solution: For U-tube units, where the Tube Layout option is not set to Use Existing Layout, the minimum U-bend diameter can be specified under Input | Exchanger Geometry | Bundle Layout.
This dimension is measured from tube center-line to tube center-line of the inner most U-tube.
By default the Minimum U-Bend Diameter... |
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