Nancyvarkey: Nancyvarkey moved page DWSIM/C2/Sensitivity-Analysis-and-Adjust/English to DWSIM-3.4/C2/Sensitivity-Analysis-and-Adjust/English without leaving a redirect: Archived as old version

2020-01-08T04:41:28Z

Nancyvarkey moved page DWSIM/C2/Sensitivity-Analysis-and-Adjust/English to DWSIM-3.4/C2/Sensitivity-Analysis-and-Adjust/English without leaving a redirect: Archived as old version

PoojaMoolya: Created page with " {| style="border-spacing:0;" | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| '''Visual Cue'''
2015-09-30T12:08:40Z

Created page with " {| style="border-spacing:0;" | style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>'''Visual Cue'''</cent..."

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{| style="border-spacing:0;"
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>'''Visual Cue'''</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>'''Narration'''</center>

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Slide 1</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Welcome to this spoken tutorial on DWSIM.

In this tutorial, we will learn how to do '''sensitivity analysis''' and '''adjust'''.

My name is Kannan Moudgalya.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Slide 2</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| In this tutorial,

We will determine the exact Reflux Ratio for a separation

We will first do this through '''Sensitivity Analysis'''

We will repeat this through the '''Adjust''' operation

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Systems requirement slide</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| To record this tutorial, I am using DWSIM 3.4

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Prerequisite Slide</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| To practice this tutorial you should know

* How to open a simulation file in DWSIM
* How to carry out rigorous distillation simulation
* How to add components to a flowsheet

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Prerequisite Tutorials and Files Slide</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Our website '''spoken tutorial''' dot '''org''' gives details of the prerequisite tutorials.

You can access these tutorials and also all the associated files from this site.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Slide for statement of problem solved

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| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| This slide shows the problem solved in one of the prerequisite tutorials.

This was solved using Rigorous distillation.

The purity achieved was less than what was desired.

How do we improve the purity?

We need to increase the reflux ratio.

Let us open the corresponding file in DWSIM - the file name is in the heading.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Show DWSIM window, already made to the required size</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| I have already opened DWSIM.

I have already opened the file '''rigorous''' dot '''dwxml'''

This file is available to you for download from our website '''spoken''' '''tutorial''' dot '''org'''.

|-

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us click '''Distillate.'''

In the '''Properties '''section, let us locate '''Molar Composition, '''item 2.

Let us click the arrow next to '''Mixture.'''

The '''Benzene''' mole fraction is 0.945.

We would like to increase this to 0.95.

Let us attempt this by increasing the reflux ratio.

This is what we saw in the slide a little while ago.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Locate the '''Optimization '''option from the '''Menu''' bar, to the right of the '''File '''button.

Let me click it.

Let me click the option '''Sensitivity Analysis.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| A window appears.

We can see five menus in the menu bar of sensitivity analysis.

Locate '''Sensitivity Studies.'''

If it is not already selected, click it.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Now we can see a box with four options under the title '''Case Manager.'''

Click on '''New '''option.

This will help in creating a new Sensitivity Analysis case.

We see the name '''SACase0.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Recall the problem that we want to solve:

We want to increase the reflux ratio so as to get better purity.

Thus, '''reflux ratio''' is the '''independent variable.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us enforce this through the '''Independent Variables '''button.

Let me click on empty space besides the '''Object '''option.

Click on '''DC-000''', the name of our distillation column.

On the right hand side, there is an option named '''Property.'''

Let me click the down arrow.

Now scroll down and identify '''Condenser_Specification_Value.'''

It comes at the bottom of this menu.

It plays the role of '''reflux ratio'''.

Click and select it.

You can see it selected here.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Recall that we want our reflux ratio to be greater than 2.

So, we will enter the lower limit at 2.

Change the upper limit to 2.5.

Change the number of points to 6.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us next click on '''Dependent Variable.'''

On the left hand side, see a column called '''Variables.'''

Below that, see a plus button in green to '''Add '''variables.

Click it.

A new row appears.

Click the down arrow below '''Object.'''

You may have to click it twice.

Click on the option named '''Distillate.'''

Let me click the down arrow below '''Property.'''

You may have to click this also twice, to open a drop down menu.

Locate '''Molar Fraction (Mixture) – Benzene.'''

You have to scroll down to reach it.

There are also other options that sound very similar to it.

Make sure that you choose this.

Click it.

It gets selected and appears on the tab.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Then click on '''Results.'''

We can see the option called '''Start Sensitivity Analysis.'''

Let me click it.

We see the column getting simulated for reflux ratios, one by one.

At the end of the simulation, we get the message '''Done.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| You see results for six reflux ratios, from 2 to 2.5.

We also see the corresponding benzene compositions.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Menu bar→ Optimization→ Sensitivity Analysis</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We can go back to '''Independent Variables.'''

Change the number of points to 11.

Return to Results.

Click '''Start Sensitivity Analysis''' once again.

You can see that eleven runs get completed.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Click Independent Variables</center>

<center>Type 2.05, 2.1</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us scroll up.

See that the desired purity of 0.95 will be achieved between 2.05 and 2.1.

You may choose these as the lower and upper limits in

'''Independent Variables''' and repeat.

But, I will not do that now.

Continuing in this manner, we can determine the exact

reflux ratio required for 0.95 purity.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Assignment 1</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| I have an assignment for you.

Can you find out the reflux ratio required for 0.95 purity?

Follow the procedure I explained just now.

I will give you the answer: it is approximately 2.067.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We can also see these results in a graphical form.

Click on '''Chart '''option.

Click on '''Draw '''option.

You can see the chart here.

Distillate composition versus the condenser specification value.

That is, the reflux ratio.

Let me close this pop up.

Let me save this simulation as '''sensitivity.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Assignment 2</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us go to the next assignment.

In the previous assignment, include a second dependent variable:

benzene mole fraction in the bottoms.

Observe both distillate and bottoms compositions.

Find out how to plot two profiles using '''Chart.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Assignment 3</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us do another assignment.

Verify whether the reflux ratio of 2.067 that we saw in assignment 1 will work.

For this, start with '''rigorous.dwxml''' once again.

Change the reflux ratio to 2.067.

Simulate.

What distillate composition do you get?

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Object Palette → Adjust→ Drag to flowsheet</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We calculated the desired reflux ratio by trial and error.

DWSIM has a powerful method to directly calculate this.

It is called '''Adjust.'''

Locate '''Adjust '''from the '''object palette''' on the right hand side.

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

Let me click and choose it.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| In the '''Properties tab, '''we see an option called '''Controlled variable.'''

This corresponds to the dependent variable, namely, distillate composition.

If it is not already opened, let us click the arrow to the left of '''Controlled Variable.'''

And, this will open up.

Click where it says '''Click to Select.'''

Click the button that comes at the right end.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| A pop up appears.

It has three columns.

Below '''Type,''' click on '''Material Stream, '''if it is not already selected.

In the '''Object''' column, that is, the middle column, choose

'''Distillate.'''

This produces a lot of variables on the right most column.

Locate '''Molar Fraction (Mixture) – Benzene '''

It comes after '''Solid Phase''' entries end

Click it.

Once again, be careful, as there are many similar sounding options.

Click '''OK.'''

Verify that this gets reflected in the properties menu.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Repeat the above process, but now, with '''Manipulated Variable.'''

Click the button on the right.

In the pop up, scroll down and locate '''Distillation column.'''

Click on it.

Then click '''DC-000.'''

Then locate '''Condenser_Specification_Value.'''

Click it and then '''OK.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Enter 0.95001</center>

| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Follow the usual procedure, now for '''Parameters''' property.

Scroll down to see it.

We can see an option called '''Adjust Property Value.'''

This value is generally 1.

Delete 1 and enter 0.95.

I shall enter a slightly larger number 0.95001.

I want you to think about why I have entered a slightly larger number.

A few lines below this, see an option called

'''Simultaneous Adjust.'''

Following the usual way, change its value to '''True.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| If it does not automatically calculate,

Press '''Play''' and then '''Recalculate All'''.

In my case, it calculated automatically.

So, I shall not click those.

In a short time, calculations get completed.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us check whether our objective of 0.95 for distillate purity is achieved.

Choose '''Distillate.'''

Check '''Mixture '''under '''Molar Composition.'''

We can see that the benzene composition is 0.95.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Calculator→ Play, Recalculate</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us now check what reflux ratio is required for this.

For this, click on the Distillation column.

Check the value under '''Condenser Specification.'''

We see a value of 2.067.

It is the same as what we obtained in the '''Sensitivity Analysis.'''

Let me save this simulation as '''adjust.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Assignment 4</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| I have the next assignment for you.

Supposing that I want 0.96 benzene mole fraction in the distillate.

What reflux ratio is required?

As in the problems we solved, you may change only the reflux ratio.

Solve this first by '''Sensitivity Analysis.'''

Check your calculations with '''Adjust.'''

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Assignment 5</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let us do one more assignment.

Find the highest distillate purity you can get in this column.

You may vary the reflux ratio only, as in the earlier assignments.

I could go up to a mole fraction of 0.99, by proceeding gradually.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Slides</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Let me summarise.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Summary slide</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We learnt the following in this tutorial:

* how to do Sensitivity Analysis
* how to narrow the solution range
* how to directly achieve the same results using Adjust
* how to use Adjust to push a plant to deliver more

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"|
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We have come to the end of this tutorial

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>About the Spoken Tutorial project</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| This video summarises the '''Spoken Tutorial''' project.

If you do not have good bandwidth, you may download and watch it.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Spoken Tutorial workshops</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| We conduct workshops using '''Spoken Tutorials.'''

Give certificates.

Please contact us.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Forum</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Do you have questions in THIS '''Spoken Tutorial?'''

Choose the minute and second where you have the question.

Explain your question briefly.

Someone from the '''FOSSEE''' team will answer them.

Please visit this site.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>TextBook Companion</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| The '''FOSSEE''' team coordinates coding of solved examples of popular books.

We give honorarium and certificates for those who do this.

For more details, please visit this site.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Lab Migration</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| 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.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Acknowledgement</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Spoken Tutorial and '''FOSSEE''' projects are funded by NMEICT, MHRD, Government of India.

|-
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| <center>Thanks</center>
| style="border:1pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| Thanks for joining.

|}

DWSIM-3.4/C2/Sensitivity-Analysis-and-Adjust/English - Revision history

Nancyvarkey: Nancyvarkey moved page DWSIM/C2/Sensitivity-Analysis-and-Adjust/English to DWSIM-3.4/C2/Sensitivity-Analysis-and-Adjust/English without leaving a redirect: Archived as old version

Nancyvarkey at 13:20, 1 October 2015

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