Nancyvarkey at 09:36, 5 February 2020

2020-02-05T09:36:03Z

Kaushik Datta at 09:57, 16 January 2020

2020-01-16T09:57:36Z

Kaushik Datta: Created page with "{|border=1 ||'''Visual Cue''' ||'''Narration''' |- | '''Slide Number 1''' '''Title Slide''' || Welcome to this tutorial on '''Sensitivity Analysis''' and '''Adjust''' in ''..."

2020-01-16T09:54:03Z

Created page with "{|border=1 ||'''Visual Cue''' ||'''Narration''' |- | '''Slide Number 1''' '''Title Slide''' || Welcome to this tutorial on '''Sensitivity Analysis''' and '''Adjust''' in ''..."

New page

{|border=1
||'''Visual Cue'''
||'''Narration'''
|-
| '''Slide Number 1'''

'''Title Slide'''
|| Welcome to this tutorial on '''Sensitivity Analysis''' and '''Adjust''' in '''DWSIM.'''
|-
|| '''Slide Number 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn to:
* Determine the exact '''Reflux Ratio''' for a separation
* Perform '''Sensitivity Analysis''' and '''Adjust''' operation
|-
|| '''Slide Number 3'''

'''System Requirements'''
|| This tutorial is recorded using,* '''DWSIM 5. 8 Update 3''' '''(Classic UI) '''and
* '''Windows 10''' '''OS'''

But, this process is identical in '''Linux, Mac OS X '''or '''FOSSEE OS '''on''' ARM'''.
|-
|| '''Slide Number 4'''

'''Prerequisites'''
|| To practise this tutorial you should know to -* Open a simulation file in '''DWSIM'''
* Carry out '''rigorous distillation''' simulation
* Add components to a '''flowsheet'''
|-
|| '''Slide Number 5'''

'''Prerequisite Tutorials and Files'''

'''https:\\spoken-tutorial.org'''
|| The prerequisite tutorials are available on this website'''.'''

You can access these tutorials and all the associated files from this site.
|-
|| '''Slide Number 6'''

'''Code Files'''
|| '''rigorous.dwxmz''' file used in the tutorial is provided as a '''Code file''' on this tutorial page.

Download the file from the '''Code Files''' link.
|-
|| '''Slide Number 7'''

'''Problem solved in Prerequisite tutorial'''

Point to the '''Purity'''
|| This slide shows the problem solved using '''Rigorous Distillation'''.

The purity achieved was less than what was desired.

To improve the purity, we need to increase the '''reflux ratio'''.
|-
|| Switch to '''DWSIM'''
|| I have already opened '''DWSIM''' on my machine.
|-
|| Point to the Simulation window
|| Open the file '''rigorous dot dwxmz.'''
|-
|| Click '''Distillate'''
|| Click on '''Distillate '''in the '''flowsheet'''.
|-
|| Cursor to the '''Editor Window'''
|| Go to '''Property Editor Window.'''
|-
|| '''Input Data''' >> '''Compound Amounts'''
|| Under '''Input Data''', click on '''Compound Amounts''' tab.
|-
|| Highlight '''Benzene''' mole fraction is '''0.988'''.
|| Here the '''Benzene mole fraction''' is '''0.988.'''

We would like to increase this to '''0.99'''.
|-
||
|| Let us attempt this by increasing the '''reflux ratio'''.
|-
|| Click on '''Optimization '''option in the '''Menu''' bar
|| To do so, click on '''Optimization '''option on the menu bar.
|-
|| Click on '''Sensitivity Analysis'''
|| Now click on '''Sensitivity Analysis '''option.

'''Sensitivity Analysis '''tab opens.
|-
|| Highlight the 5 menus
|| Here we can see five menus in the menu bar of '''Sensitivity Analysis.'''
|-
|| Cursor to the '''Sensitivity Analysis '''window

Click on '''Sensitivity Studies.'''
|| Now click on '''Sensitivity Studies, '''if not already selected.

On my system, by default, it is already selected.
|-
|| Point to four buttons under '''Case Manager'''
|| Under '''Case Manager''', we can see four buttons.
|-
|| Click on '''New '''button
|| Click on '''New '''button.

This will help in creating a new '''Sensitivity Analysis case. '''
|-
|| Point to '''SACase0.'''
|| We see the name '''SACase0.'''
|-
|| Point to '''reflux ratio'''
|| Here we want to increase the '''reflux ratio''' so as to get better purity.

Thus, '''reflux ratio''' is the '''independent variable.'''
|-
||Click on '''Independent Variables '''button
|| Let us do this through the '''Independent Variables'''.

Under '''Sensitivity Analysis, '''click on '''Independent Variables''' tab.
|-
|| Click on '''Object '''button
|| Under '''Independent Variable 1, '''click on the drop-down against '''Object.'''
|-
|| Click on '''DC-005'''
|| Select '''DC-005''', the name of our '''distillation''' column.
|-
|| Click on '''Property'''
|| On the right hand side, click on the drop-down against '''Property.'''
|-
|| Scroll down and click on '''Condenser_Specification_Value '''
|| Now scroll down and select '''Condenser_Specification_Value.'''

It plays the role of the '''reflux ratio'''.
|-
||
|| Recall that we want our '''reflux ratio''' to be greater than''' 2.317.'''
|-
|| '''Lower limit''' >>''' 2.317'''
|| So, we will enter the '''Lower limit''' as''' 2.317'''
|-
|| '''Upper limit''' >> '''2.5'''
|| Change the '''Upper limit''' to '''2.5'''
|-
|| '''Number of Points''' >> '''6'''
|| Change the '''Number of Points''' to '''6'''
|-
|| Click on '''Dependent Variable.'''
|| Now under '''Sensitivity Analysis, '''click on '''Dependent Variables''' tab.
|-
|| Click on '''Dependent Variable'''
|| On the left hand side, we can see a column named '''Variables.'''
|-
|| Under '''Variables''', click on green '''Add''' button
|| Below that, locate a green coloured plus button to '''Add '''new '''variables'''.

Click on it.

A new row appears.
|-
|| '''Object >>''' '''Distillate'''
|| Click on the drop-down against '''Object.'''

Select '''Distillate.'''
|-
|| '''Property >> Molar Fraction (Mixture) – Benzene.'''
|| Now click on the drop-down against '''Property.'''

Scroll down and select '''Molar Fraction (Mixture) – Benzene.'''
|-
|| Click on '''Results''' >> '''Start Sensitivity Analysis'''
|| Next click on the '''Results''' tab to the right of the '''Dependent Variables''' tab.

Then click on '''Start Sensitivity Analysis '''button.
|-
|| Point to the '''Results''' section.
|| We see the column getting '''simulated''' for '''reflux ratios''', one by one.
|-
|| Point to the '''Information''' section at the bottom.
|| At the end of the '''simulation''', we get the message '''Done.'''
|-
|| Cursor to the '''Reflux Ratio''' values

Point to the '''Benzene''' compositions
|| Here we can see results for six '''reflux ratios''', from''' 2.317''' to '''2.5'''

We also see the corresponding '''benzene''' compositions.
|-
|| Click on '''Independent Variables '''tab

'''Number of Points''' >> '''11'''.
|| Now under '''Sensitivity Analysis, '''click on '''Independent Variables '''tab.

Change the '''Number of Points''' to '''11'''.
|-
|| Click on '''Results'''.
|| Again click on '''Results''' tab.
|-
|| Click on '''Start Sensitivity Analysis''' button
|| Click on '''Start Sensitivity Analysis''' button once again.

You can see that '''simulation''' runs to show eleven results this time.
|-
|| Click '''Independent Variables '''

Type''' Lower Limit: 2.3719, '''

'''Upper Limit: 2.3902'''
|| We can see that the desired purity of '''0.99''' will be achieved between '''2.3719''' and '''2.3902'''

Choose these as the lower and upper '''limits''' in '''Independent Variables'''.
|-
|| Click on '''Results'''.
|| Again click on '''Results''' tab.
|-
|| Click on '''Start Sensitivity Analysis''' button
|| Click on '''Start Sensitivity Analysis''' button once again.
|-
|| Point to '''reflux ratio'''
|| Here we get the '''reflux ratio''' value as '''2.382'''.

This way we can determine the exact '''reflux ratio '''required for '''0.99''' purity.
|-
|| Click on '''Chart '''tab
|| We can also see these results in a graphical form.

Now under '''Sensitivity Analysis, '''click on '''Chart '''tab.
|-
|| Click on '''Chart '''tab '''Draw '''option
|| On the left of the window, click on the '''Draw '''button.
|-
|| Point to the graph
|| On the right, we can see the chart here.

This graph plots between '''Distillate composition''' vs '''condenser specification value'''.

That is, the '''reflux ratio'''.
|-
|| '''File >> Save As >> sensitivity'''
|| Let me save this simulation as '''sensitivity.'''
|-
|| Close
|| Now close the '''Sensitivity Analysis''' tab..

|-
||
|| We have learnt to calculate the desired '''reflux ratio''' by '''trial and error method'''.
|-
|| '''Object Palette >> Logical Ops'''
|| '''DWSIM''' has a powerful '''method''' to directly calculate the '''reflux ratio. '''

It is called '''Adjust.'''

Now at the bottom of the main '''simulation''' window, click on '''Logical Ops''' tab.
|-
|| Click on '''Controller Block''' >> drag and drop it >>click on '''Distillate'''
|| Click on '''Controller Block'''.

Drag and drop it outside the column, below the '''distillate'''.

Now, click on it.
|-
|| Point to the left
|| On the left, we can see a tab displaying properties related to '''Adjust.'''
|-
|| '''Linked Objects >> Manipulated Object >> DC-005'''
|| Under '''Linked Objects,''' click on the drop-down against '''Manipulated Object.'''

Now select '''DC-005'''.
|-
|| Click on the drop-down against '''Manipulated Property'''.

Select '''Condenser_Specification_Value.'''
|| Next, click on the drop-down against '''Manipulated Property.'''

Then select '''Condenser_Specification_Value.'''
|-
|| Click on the drop-down against '''Controlled Object'''.

Select '''Distillate.'''
|| Next, click on the drop-down against '''Controlled Object''' and select '''Distillate.'''
|-
|| Click on the drop-down against '''Controlled Property'''.

Select '''Molar Fraction(Mixture) / Benzene.'''
|| Next, click on the drop-down against '''Controlled Property.'''

And select '''Molar Fraction(Mixture) / Benzene.'''
|-
|| Go to the '''Parameters''' section.
|| Now, go to the '''Parameters''' section.
|-
|| Enter '''Set-Point/Offset (Controlled Property) '''as''' 0.9901'''
|| Enter '''Set-Point/Offset (Controlled Property) '''as''' 0.9901''' and press '''Enter.'''
|-
|| Enter '''0.9901'''

|| I shall enter a slightly larger number '''0.9901'''.

I want you to think about why I have entered a slightly larger number.
|-
|| Select the '''Solve Globally '''check box.
|| Now, select the check-box against '''Solve Globally'''.
|-
||
|| Then we will run the '''simulation.'''
|-
|| Click on '''Solve Flowsheet''' button
|| So, from the toolbar, click on '''Solve Flowsheet''' button.
|-
|| Click on '''Distillate'''
|| Let us check the distillate purity.

Click on '''Distillate''' in the flowsheet.
|-
|| Cursor to '''Input Data '''tab

'''Compound Amounts >> Benzene composition 0.99'''
|| From the '''Property''' window, go to '''Input Data''' tab.

Under '''Compound Amounts''' tab, we can see that the benzene composition is '''0.99'''.
|-
|| Click on the '''Distillation column'''.
|| Let us now check what '''reflux ratio''' is required for this.

To do this, click on the '''Distillation column'''.
|-
|| '''Column Specs >> Condenser'''
|| Under '''Column Specs''', click on '''Condenser''' tab.
|-
||'''Compound >> 2.382'''
|| Under '''Compound''', we see a value of '''2.382'''

It is the same as what we obtained in the '''Sensitivity Analysis.'''
|-
|| Save the file
|| Let me save this '''simulation''' as '''adjust.'''
|-
||
|| Let's summarize.
|-
|| '''Slide Number 8'''

'''Summary'''

|| In this tutorial, we have learnt to:
* Determine the exact '''Reflux Ratio''' for a separation
* Performed '''Sensitivity Analysis''' and '''Adjust''' operation

|-
||
|| I have some assignments for you.
|-
|| '''Slide Number 9'''

'''Assignment 1:'''

'''Components:''' Acetone & Water

'''Thermodynamics''': Raoult’s Law

'''Inlet Stream:'''

Flow Rate: 100 mol/s

Pressure: 1 atm

Mole Fractions:

Acetone = 0.7, Water = 0.3
|| Simulate this problem statement using a Distillation column.

Here we give different Compounds, feed conditions and Thermodynamics.
|-
|| '''Slide Number 10'''

'''Column Configuration:'''

Number of stages: 13 (excluding total condenser)

Feed Stage: 8

Reflux Ratio: 0.70611

Mole flow rate of bottoms: 29.592 mol/s
|| Different Column Configuration
|-
|| '''Slide Number 11'''

'''Assignment 2:'''

Perform sensitivity analysis on the simulated distillation column:

To find the reflux ratio such that mole fraction of water in bottoms is 0.99

Using Adjust/Controller Block, verify the results obtained using the analysis

|| Let us go to the next assignment.

Perform sensitivity analysis on the simulated distillation column.

To find the reflux ratio such that mole fraction of water in bottoms is 0.99

Using Adjust/Controller Block, verify the results obtained using the analysis.
|-
|| '''Slide Number 12'''

'''About the Spoken Tutorial Project'''

|| Watch the video available at the following link.

[http://spoken-tutorial.org/ http://spoken-tutorial.org/]

It summarizes the Spoken Tutorial project.
|-
|| '''Slide Number 13'''

'''Spoken Tutorial Workshops'''

|| The Spoken Tutorial Project Team conducts workshops and gives certificates.

For more details, please write to us.
|-
|| '''Slide Number 14'''

'''Forum Slide'''

Do you have questions in this '''Spoken Tutorial?'''

Please visit this site

Choose the minute and second where you have the question.

Explain your question briefly.

Someone from the FOSSEE team will answer them.
|| Please post your timed queries in this forum.
|-
|| '''Slide Number 15'''

'''DWSIM Flowsheeting Project'''

|| The '''FOSSEE''' team coordinates conversion of existing '''flowsheets''' into '''DWSIM'''.

We give honorarium and certificates for those who do this.

For more details, please visit this site.
|-
|| '''Slide Number 16'''

'''Lab Migration Project'''

|| The '''FOSSEE''' team helps migrate commercial simulator labs to '''DWSIM.'''

We give honorarium and certificates for those who do this.

For more details, please visit this site
|-
|| '''Slide Number 17'''

'''Acknowledgements'''
|| '''Spoken Tutorial''' and '''FOSSEE''' projects are funded by '''NMEICT''', ''' MHRD''', Government of India.
|-
|| '''Slide Number 18'''

'''Thanks'''
|| We thank the '''DWSIM''' team for making it as an open source software.

This tutorial was originally recorded by Prof Kannan Moudgalya in September 2015.

This is Kaushik Datta from IIT Bombay.

Thanks for joining.
|-
|}

@@ Line 18: / Line 18: @@
 '''System Requirements'''
-|| This tutorial is recorded using,* '''DWSIM 5. 8 Update 3''' '''(Classic UI) '''and
+|| This tutorial is recorded using,
-* '''Windows 10''' '''OS'''
+* '''DWSIM 5. 8 (Classic UI) Update 3'''and
 But, this process is identical in '''Linux, Mac OS X '''or '''FOSSEE OS '''on''' ARM'''.
@@ Line 26: / Line 27: @@
 '''Prerequisites'''
-|| To practise this tutorial you should know to -* Open a simulation file in '''DWSIM'''
+|| To practise this tutorial you should know to -
-* Carry out '''rigorous distillation''' simulation
+* Open a '''simulation''' file in '''DWSIM'''
 * Add components to a '''flowsheet'''
 |-
@@ Line 35: / Line 37: @@
 '''https:\\spoken-tutorial.org'''
-|| The prerequisite tutorials are available on this website'''.'''
+|| The prerequisite tutorials are available on this website.
 You can access these tutorials and all the associated files from this site.
@@ Line 309: / Line 311: @@
 |-
 || Click on '''Distillate'''
-|| Let us check the distillate purity.
+|| Let us check the '''distillate''' purity.
 Click on '''Distillate''' in the flowsheet.
@@ Line 318: / Line 320: @@
 || From the '''Property''' window, go to '''Input Data''' tab.
-Under '''Compound Amounts''' tab, we can see that the benzene composition is '''0.99'''.
+Under '''Compound Amounts''' tab, we can see that the '''benzene''' composition is '''0.99'''.
 |-
 || Click on the '''Distillation column'''.

@@ Line 287: / Line 287: @@
 And select '''Molar Fraction(Mixture) / Benzene.'''
 |-
-|| Go to the '''Parameters''' section.
+|| Go to the '''Parameters'''.
-|| Now, go to the '''Parameters''' section.
+|| Now, go to '''Parameters'''.
 |-
 || Enter '''Set-Point/Offset (Controlled Property) '''as''' 0.9901'''

DWSIM/C2/Sensitivity-Analysis-and-Adjust/English - Revision history

Nancyvarkey at 09:36, 5 February 2020

Kaushik Datta at 09:57, 16 January 2020

Kaushik Datta: Created page with "{|border=1 ||'''Visual Cue''' ||'''Narration''' |- | '''Slide Number 1''' '''Title Slide''' || Welcome to this tutorial on '''Sensitivity Analysis''' and '''Adjust''' in ''..."