Sensitivity Analysis and Adjust - English
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- DWSIM Tutorials - English
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Adjust block function not working
I've followed the instructions for the control / adjust block but the simulation will not converge.I keep getting an error message:"Solver reached the maximum number of iterations without convering. (BubblePoint.vb 1703)"I tried to adjust the tolerance for the adjust block and even change the SP for the distillate to a lower concentration but I still have had no success.Any help would be appreciated.
08-09M 10-20S unanswered chimadiko
Question posted on: March 16, 2025, 2:49 a.m.
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The actual times of sensitivity analysis simulation are lower than the number of points on Independent Variables tab I set.
Firstly, the number of points on Independent Variables tab was set as 6, but I only got two results after running sensitivity analysis. Secondly, I got an error message"DC-005: Solver reached the maximum number of iterations without converging." after running the adjust simulation. Thanks for your help.
04-05M 40-50S unanswered 666
Question posted on: March 13, 2024, 8:10 a.m.
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Sensitive Analysis and Adjust
In sensitive data analysis i have set the upper limit and lower limit & No. of points as per tutorial but in result section there is error shows in to total no. of points, can not showa the total no of points.
03-04M 50-60S AnkushAmbarkarJain
Answer last updated on: Aug. 2, 2024, 3:08 p.m.
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The Reflux ratio and purity attained doesn't match with the tutorial while using the Adjust option
The Reflux ratio and purity attained doesn't match with the tutorial while using the Adjust option is that because the Molar fraction (mixture)/ Benzene in tutorial is seen as 0.988697(-0.0014) and for me it is shown to be 0.988672(-0.0013). Sensitivity analysis is working perfectly fine.(DWSIM VERSION 6.4.3 64 bit has been installed)
07-08M 0-10S vidyavijayev
Answer last updated on: Jan. 6, 2023, 11:22 a.m.
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Optimizition
Hello dear friendsI want an example solved by optimization. Can anyone help?If anyone has a solved example, send it to my emailThank you very muchmortezasafari7171@gmail.com
00-01M 0-10S Morteza
Answer last updated on: June 23, 2021, 10:15 p.m.
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Problem in Assignment solving
As the column specification is already given in assignment and adjusting feed conditions , bottoms for acetone and water in mixture are still showing value 0.7 and 0.3 respectively. and not changing . and in sensitivity analysis under depending variable we have to take bottoms or distillate, as our desired reflux ration is to find for bottoms (water) . Kindly help for this sir.
10-11M 0-10S Maulish
Answer last updated on: June 21, 2021, 3:39 p.m.
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Result Not matching
Sir the results for the adjust feature are not matching. I followed the method given in tutorial exactly. It is not reaching 0.99 and the obtained reflux ratio is 2.55
08-09M 20-30S Yashraj987
Answer last updated on: Feb. 20, 2021, 5:28 p.m.
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My logical operator it doesn't work
the logical operator of adjust, it moves away instead of approaching the value I want, why is that? What can I do?
08-09M 40-50S LuisR_RebolledoF
Answer last updated on: Feb. 20, 2021, 12:22 p.m.
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Cannot get benzene mole fraction
Hi I have follow all the steps from tutorial but i could not get benzene fraction of 0.901. Can someone please check why, below is my simulation file: https://drive.google.com/file/d/1RrH5G-9U1yq_J_dsuqYvzsMb1-DQH9D4/view?usp=sharingThanks!
08-09M 40-50S mariaanindita
Answer last updated on: Feb. 20, 2021, 12:22 p.m.
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Adjust option
Using adjust option, not getting results as sensitivity analysis. pl help
07-08M 20-30S Bhavya12
Answer last updated on: Feb. 20, 2021, 12:21 p.m.
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Assignment Problem
The number of stages in the problem is 13. Does it include the stage of reboiler or we need to do +1 when we carry out the simulation?
00-01M 10-20S Yashraj987
Answer last updated on: Feb. 20, 2021, 12:03 p.m.
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Not able to adjust the simulation
First of all I could not enter the values of feed flowrate in mol/s...it automatically changes to kmol/hr.Secondly the water mole fraction is already 0.99 before doing Adjust or Sensitivity analysis,how would I change it then....what should I take the Sef pount valu in adjusg block.Plese answet my query sir!!!
10-11M 20-30S Souvik_Mitra
Answer last updated on: Aug. 25, 2020, 12:55 p.m.
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Answer Match for Assignment
I got the final answer of XB= 0.99 for Reflux Ratio = 0.83919Can someone verify it.Please delete if posting answers is not allowed
10-11M 30-40S himanshu08
Answer last updated on: Aug. 14, 2020, 11:44 a.m.
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Unable to load Rigorous working file
As mentioned in the video training of Sensitivity and Adjust, I was trying to load the Rigorous working file in DW Sim Version 5.7, But it is showing empty flowsheet page. Please help
02-03M 10-20S phani4cts
Answer last updated on: July 13, 2020, 3:46 p.m.
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Reflux Ratio
Dear Sir/Madam,We have an option of Reflux Ratio in the independent variables tab and why do we need to choose condenser specification value to optimize the reflux ratio.
03-04M 40-50S HaareshAugustus
Answer last updated on: Feb. 23, 2018, 10:35 a.m.
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Adjust Property Value field not available
There is no field to enter the Adjust Property Value. Can you please help?
10-11M 40-50S priyamnayak
Answer last updated on: March 22, 2017, 5:15 p.m.
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Unable to select Controlled Variable and Manipulated Variable for the Adjust block
Where does one enter Controlled Variable and Manipulated Variable for the Adjust block?
09-10M 0-10S priyamnayak
Answer last updated on: March 22, 2017, 5:09 p.m.
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Unable to find Adjust in the Object Palette
Adjust option is missing from the Object Palette. Can you please help.
08-09M 40-50S priyamnayak
Answer last updated on: March 22, 2017, 5:03 p.m.
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Where do i locate the molar composition of distillate stream?
Can you please help in finding the molar composition of the distillate stream after results are generated?
01-02M 50-60S priyamnayak
Answer last updated on: March 22, 2017, 5 p.m.
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1
Creating a material stream in DWSIM -
2
Introduction to Flowsheeting -
3
Shortcut Distillation -
4
Rigorous Distillation -
Sensitivity Analysis and Adjust -
6
Plug Flow Reactor -
7
Continuous Stirred Tank Reactor -
8
Conversion Reactor -
9
Equilibrium Reactor -
10
Gibbs Reactor -
11
Heat Exchanger -
12
Shell and Tube Heat Exchanger -
13
Binary Phase Envelope -
14
Calculation of Bubble Points and Dew Points -
15
Chemsep Distillation Column -
16
Absorption Column -
17
Heterogeneous Catalytic Reaction -
18
Custom Unit Operation using Scilab -
19
Custom Unit Operation using Python -
20
Creating Multiple Reactions set
Questions posted on ST Forums:
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Outline:
Increasing the purity of distillate Independent variable in sensitivity analysis Dependent variable in sensitivity analysis Graphical display of sensitivity analysis results Verification of results of sensitivity analysis Multiple dependent variables in sensitivity analysis Manipulated variable in adjust Controlled variable in adjust Pushing the envelope through adjust
| Width: | 1086 | Height: | 698 |
|---|---|---|---|
| Duration: | 00:11:32 | Size: | 6 MB |
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