DWSIM-3.4/C2/Rigorous-Distillation/English-timed - Revision history

Nancyvarkey: Nancyvarkey moved page DWSIM/C2/Rigorous-Distillation/English-timed to DWSIM-3.4/C2/Rigorous-Distillation/English-timed without leaving a redirect: Archived as old version

2020-01-08T04:40:25Z

Nancyvarkey moved page DWSIM/C2/Rigorous-Distillation/English-timed to DWSIM-3.4/C2/Rigorous-Distillation/English-timed without leaving a redirect: Archived as old version

Pratik kamble at 11:09, 27 March 2017

2017-03-27T11:09:36Z

Sandhya.np14 at 12:23, 11 May 2016

2016-05-11T12:23:28Z

Show changes

Sandhya.np14 at 11:07, 11 May 2016

2016-05-11T11:07:49Z

Sandhya.np14 at 09:11, 11 May 2016

2016-05-11T09:11:04Z

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PoojaMoolya: Created page with "{| Border=1 | '''Time''' | '''Narration''' |- | 00:00 | Welcome to the spoken tutorial on Simulating a Rigorous distillation column in DWSIM..."

2016-04-28T12:23:27Z

Created page with "{| Border=1 | <center>'''Time'''</center> | <center>'''Narration'''</center> |- | 00:00 | Welcome to the spoken tutorial on Simulating a Rigorous distillation column in DWSIM..."

New page

{| Border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
| 00:00
| Welcome to the spoken tutorial on Simulating a Rigorous distillation column in DWSIM.

|-
| 00:07
|My name is Kannan Moudgalya.

|-
| 00:10
|In this tutorial, we will carry out a rigorous simulation of a Distillation column.

|-
| 00:15
|We will learn to specify column pressure profile.

|-
| 00:20
|We will see where to specify tray efficiencies.

|-
| 00:23
|We will check whether the product compositions are as desired.

|-
| 00:29
|We will also learn how to view the column profiles.

|-
| 00:34
| To record this tutorial, I am using DWSIM 3.4

|-
| 00:39
|To practice this tutorial you should know

|-
| 00:41
| How to open a simulation file in DWSIM

|-
| 00:45
|How to add components to a flowsheet

|-
| 00:47
|How to select thermodynamic packages

|-
| 00:51
|How to add material and energy streams and specify their properties

|-
| 00:57
|Our website '''spoken tutorial''' dot '''org''' gives details of the prerequisite tutorials.

|-
| 01:05
|You can access these tutorials and also all the associated files from this site.

|-
| 01:12
| This slide shows the problem solved in one of the prerequisite tutorials.

|-
| 01:17
|This was solved using shortcut distillation.

|-
| 01:23
|Let us open the corresponding file in DWSIM.

|-
| 01:28
| I have already opened DWSIM.

|-
| 01:31
|I have already opened the file shortcut dash end dot dwxml

|-
| 01:38
|This file is available to you for download from our website '''spoken''' '''tutorial''' dot '''org'''.

|-
| 01:45
|Let me save this as '''rigorous.'''

|-
| 01:58
|You can see that the file name has changed now to '''rigorous.'''

|-
| 02:03
| Click on the '''Configure simulation''' button.

|-
| 02:06
|Below the '''Thermodynamics '''tab, locate the '''Options '''menu.

|-
| 02:13
|Let me click it.

|-
| 02:15
|In the white space above it, you get an option called '''Units System'''. Let me click it.

|-
| 02:22
|Locate '''Pressure''' on the right hand column.

|-
| 02:26
|To see that let me bring this here

|-
| 02:30
| Change its units to '''atmosphere.'''

|-
| 02:35
|Similarly, change the units of '''Delta_P''' also to '''atmosphere.'''

|-
| 02:42
|Change also the units of '''Molar flow rate''' to '''kilo moles per hour'''.

|-
| 02:50
|Click on '''Back to simulation.'''

|-
| 02:53
| Let us switch to the slides.

|-
| 02:56
|The file we opened just now in DWSIM, solves the problem in this slide.

|-
| 03:02
|The solution is given in the next slide.

|-
| 03:05
|This problem was solved in the spoken tutorial on shortcut distillation.

|-
| 03:11
|These values form the basis for the rigorous distillation column problem.

|-
| 03:17
|You may want to write down these values in a piece of paper.

|-
| 03:20
|We will be using these values shortly.

|-
| 03:24
| Let us begin by replacing the '''Shortcut column''' with a rigorous distillation column.

|-
| 03:31
|Let me go back to the simulation.

|-
| 03:33
|Press right click on the '''Shortcut column, '''and delete it.

|-
| 03:40
|Answer '''yes''' to the prompt.

|-
| 03:43
| Locate the '''Distillation column''' in the '''Object palette'''.

|-
| 03:46
|Click on it and drop it in the place of shortcut distillation column.

|-
| 03:52
|You may have to adjust its position.

|-
| 03:55
|Click the column and select it.

|-
| 03:59
| Go to '''Selected Object window.'''

|-
| 04:02
|Under the '''Properties '''tab, locate the '''Connections''' menu.

|-
| 04:05
|It is the third item.

|-
| 04:08
|In this, we can see '''Edit Connections'''. Click on it.

|-
| 04:13
|Immediately after clicking it, a button appears at the right extreme.

|-
| 04:16
|A button with three dots, click on it.

|-
| 04:21
|Now there is a pop-up window.

|-
| 04:23
|Under the '''Feeds '''menu, click on the + button, which is the '''Add '''button.

|-
|04:29
|Under '''To Stage '''column, the option is '''Condenser '''by default.

|-
| 04:36
|Here we have to specify the stage at which feed enters.

|-
| 04:41
|Click on the arrow next to the '''Condenser.'''

|-
| 04:44
|In my version of DWSIM, I had to click a second time.

|-
| 04:49
|We can see the list of stages.

|-
| 04:51
|Select the stage where we want the feed to enter the Distillation column.

|-
| 04:57
|Here we select '''Stage_6'''.

|-
| 05:00
|Now we will select the material stream.

|-
| 05:03
|Click on the down arrow below the '''Stream '''menu.

|-
| 05:08
|You may have to click this also twice.

|-
| 05:10
|Click on '''Feed'''.

|-
| 05:12
|We have done the pairing that the '''Feed''' should go to '''Stage_6.'''

|-
| 05:17
|The actual connection will be done later in the flowsheet.

|-
| 05:22
| This is as per the solution we got in the shortcut distillation column.

|-
| 05:27
|Let us see it in the slide, we see the optimal feed location to be six.

|-
| 05:31
|Let us go back to DWSIM.

|-
| 05:35
| In a similar way, you have to pair the product streams.

|-
| 05:39
|Pair the '''Condenser''' to '''Distillate.'''

|-
| 05:42
|Pair the '''Reboiler '''to '''Bottoms.'''

|-
| 05:46
| Now we will connect heat duties to reboiler and condenser.

|-
| 05:50
|Pair '''C-Duty '''with '''Condenser''' and '''R-Duty '''with '''Reboiler'''.

|-
| 05:58
|We will now convert all the pairing into connections.

|-
| 06:02
|Click on any one of '''Feed''' or '''Condenser''' or '''Reboiler.'''

|-
| 06:09
|This completes the connections indicated by pairing.

|-
| 06:14
|We can move this and check.

|-
| 06:17
|You can see the connections have been made.

|-
| 06:21
|Let me close this.

|-
|06:24
|Let me shift some streams to make it look more beautiful.

|-
| 06:35
| Click the '''Column''' and select it.

|-
|06:37
|Under '''Properties '''tab, locate the '''Column Properties '''section.

|-
|06:43
|It is the first option.

|-
|06:44
|This section is used to specify the various attributes of a Distillation Column.

|-
|06:51
|In this section, the first option is '''Condenser Pressure.'''

|-
|06:55
|By default, it is '''1 atmosphere'''.

|-
|06:59
|We will leave it as it is.

|-
|07:00
|Next is the '''Reboiler Pressure'''.

|-
|07:04
|I will change its value to '''1.1 atmosphere'''.

|-
|07:09
|Using this, I will show how to establish a linear profile in the column.

|-
| 07:16
| Locate the '''Number of Stages''' option next.

|-
|07:20
|You have to enter the total number of trays here.

|-
|07:24
|Enter 15 here.

|-
|07:27
|Because, this number includes the condenser also in DWSIM.

|-
|07:32
|We plan to use a total condenser.

|-
|07:33
|So, this number should be one more than the equilibrium stages given by shortcut method.

|-
|07:41
|We got the equilibrium stages to be 14 from the shortcut method.

|-
|07:47
|We can see it in the slide.

|-
|07:50
|Let us go back.

|-
|07:51
|The next option is '''Edit Stages.''' Click it.

|-
|07:57
|Press the button at the right extreme.

|-
|08:01
|It shows the condenser and reboiler pressures at 1 and 1.1 atmosphere.

|-
|08:08
|These are the values that we entered just now.

|-
|08:12
|The New stages that have been added have been assigned zero pressures, which is incorrect.

|-
|08:20
|We would like infact all the intermediates stage pressures to take interpolated values.

|-
|08:28
|Go to the left column and click the interpolation symbol at the bottom.

|-
|08:35
|Immediately, linearly interpolated values are assigned to every stage.

|-
|08:41
|One may also change the pressure in any of the stages one through thirteen.

|-
|08:47
|For example, I will click this pressure and change it to one atmosphere.

|-
|08:56
|Let me undo this by pressing the interpolated values again.

|-
|09:02
|This is a very useful and important method.

|-
|09:05
|Whenever the number of trays changes, you will have to press the interpolate button.

|-
|09:10
|If you forget this, there could be a lot of problems.

|-
|09:14
|For example, there could be negative flow rates.

|-
|09:18
|Remember to do this in Assignment 3 at the end of this tutorial.

|-
|09:22
|One may also change the efficiency in one or more stages, as given here.

|-
|09:30
|Close this popup.

|-
|09:32
|Next we have the '''Condenser type'''.

|-
|09:35
|For that, we have to go up.

|-
|09:38
|By default, it is '''total condenser'''.

|-
|09:41
|We will leave it as it is.

|-
|09:44
|Next we have '''Condenser Pressure drop '''in atmosphere. By default, it is '''0.'''

|-
|09:49
|We will leave it as it is.

|-
|09:53
|Next we have '''Condenser Specifications'''.

|-
|09:56
|Under this menu, we have the type as '''Stream_Ratio '''by default.

|-
|10:03
|Below this, we can see the '''Value''' menu.

|-
|10:07
|Click on the field besides it.

|-
|10:10
|Enter the required Reflux ratio.

|-
|10:13
|Here we enter it as 2.

|-
|10:16
|Recall that the minimum reflux ratio from the shortcut distillation was 1.47.

|-
|10:26
|By multiplying 1.47 by 1.3 and rounding it off, we get 2.

|-
|10:33
|Next we have '''Reboiler Specifications'''.

|-
|10:38
|Under this menu, we have the type as '''Product Molar Flow Rate '''by default.

|-
|10:47
|Change the units to kmol/per hour, if necessary.

|-
|10:55
|We see the '''Value '''menu.

|-
|10:58
|Enter the required Molar flow rate.Here we enter it as '''61.1'''.

|-
|11:05
|This is suggested by the shortcut solution.

|-
|11:09
|We can see it in the slide.

|-
| 11:13
| Now we will select the solution method.

|-
| 11:17
|Locate the '''Solving''' '''Method '''option from the '''Properties''' tab. It is item 7.

|-
| 11:26
|Click on the field besides it.

|-
| 11:30
|Click on the arrow on the right extreme.

|-
| 11:33
|We can see a list of solving methods.

|-
| 11:36
|Select '''WangHenke_BubblePoint'''.

|-
| 11:41
| Now we will run the simulation

|-
| 11:43
| To do this, go to the calculator options

|-
| 11:47
|Click on the '''Play''' button

|-
| 11:50
|Now click on the '''Recalculate All''' button

|-
| 11:55
|When the calculations are completed, click the product compositions.

|-
| 12:01
|Choose a stream, for example distillate.

|-
| 12:05
|You know how to check the product compositions from the '''molar compositions '''option.

|-
| 12:15
|Now, click on the '''Distillation column'''.

|-
| 12:19
|Under '''Properties '''tab, locate the '''Results '''menu. It is item 8.

|-
| 12:27
|This shows all the required results like Condenser Duty, Reboiler Duty and Column Profiles

|-
| 12:34
|To see the '''Column profiles''', click on it.

|-
| 12:39
|We can see the button appearing on the right extreme click on it.

|-
| 12:44
|Now we can see the pop-up window.

|-
| 12:46
|We can see the temperature and pressure profiles.

|-
| 12:51
|Flows profiles.

|-
| 12:53
|Component flows and Component fractions.

|-
| 12:58
|If you want to know the exact numbers, use the Table tab to the right of the Graph tab.

|-
| 13:07
|Let me close this.

|-
| 13:10
|Let us save this file.

|-
| 13:15
| Let me summarise.

|-
| 13:17
| We learnt how to simulate a rigorous '''Distillation column'''

|-
|13:21
| Specified pressure profile

|-
| 13:23
| Found out where to give tray efficiencies

|-
| 13:26
| Verify column profiles

|-
| 13:30
| Let me give some assignments.

|-
| 13:33
| Repeat the calculations for a constant column pressure of 1atmosphere. That is, with reboiler pressure = 1atmosphere.

|-
| 13:42
|Do you see major changes in the results?

|-
| 13:46
| Next, simulate the distillation column at a constant pressure of 1 atmosphere.
That is, the reboiler pressure also is at 1 atmosphere.

|-
| 13:55
|If the reflux ratio is increased beyond 2, does the purity improve?

|-
| 14:01
|What reflux ratio should you use, if the actual purity is as desired.

|-
| 14:07
|In a future tutorial, we will show how '''sensitivity analysis''' can help do this easily.

|-
| 14:16
| In the next assignment, we simulate the column at a reflux ratio of 2.

|-
| 14:22
|Keep the column pressure constant at 1 atmosphere.

|-
| 14:24
|Increase the total number of trays by 1. That is, from 15 to 16.

|-
| 14:31
|As the number of trays has changed, you have to use the interpolate option.

|-
| 14:36
|This was mentioned earlier also.

|-
| 14:38
|With a larger number of trays, has the purity increased?

|-
| 14:44
| In the next assignment, verify the following relationship:

|-
| 14:48
| Composition of vapour flow to the condenser = distillate product composition

|-
| 14:54
|Explain why this equation has to be satisfied.

|-
| 14:58
| In the next assignment, check the consistency of the variables of the reboiler.

|-
| 15:03
|Use compositions, temperature and pressure at the reboiler for this purpose.

|-
| 15:10
|Do this through an equivalent flash calculation.

|-
| 15:15
| In the last assignment, solve the problem by different '''Solving Methods'''.

|-
| 15:20
|Compare the results.

|-
| 15:21
|Compare the computation times.

|-
| 15:25
| We have come to the end of this tutorial

|-
| 15:27
| This video summarises the '''Spoken Tutorial''' project.

|-
| 15:31
|If you do not have good bandwidth, you may download and watch it.

|-
| 15:36
| We conduct workshops using '''Spoken Tutorials '''. Give certificates.Please contact us.

|-
| 15:42
| Do you have questions in THIS '''Spoken Tutorial?'''

|-
| 15:45
|Choose the minute and second where you have the question.

|-
| 15:49
|Explain your question briefly.

|-
| 15:51
|Someone from the '''FOSSEE''' team will answer them.

|-
| 15:54
|Please visit this site.

|-
| 15:56
| The FOSSEE team coordinates coding of solved examples of popular books.

|-
| 16:02
|We give honorarium and certificates for those who do this.

|-
| 16:06
|For more details, please visit this site.

|-
| 16:10
|The FOSSEE team helps migrate commercial simulator labs to DWSIM.

|-
| 16:16
|We give honorarium and certificates for those who do this.

|-
| 16:20
|For more details, please visit this site.

|-
| 16:24
| Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.

|-
| 16:31
| Thanks for joining.

|}

← Older revision	Revision as of 04:40, 8 January 2020
(No difference)

@@ Line 41: / Line 41: @@
 |-
 | 00:41
-|* How to open a '''simulation file''' in DWSIM
+|How to open a '''simulation file''' in DWSIM
 |-
 | 00:45
-|* How to add components to a '''flowsheet'''
+|How to add components to a '''flowsheet'''
 |-
 | 00:47
-|* How to select '''thermodynamic packages'''
+|How to select '''thermodynamic packages'''
 |-
 | 00:51
-|* How to add '''material''' and '''energy streams''' and specify their properties.
+|How to add '''material''' and '''energy streams''' and specify their properties.
 |-
@@ Line 349: / Line 349: @@
 |-
 |06:43
-|It is the first option.
+|It is the first option.This section is used to specify the various attributes of a '''Distillation Column'''.
-−
-|-
-|06:44
-|This section is used to specify the various attributes of a '''Distillation Column'''.
 |-
@@ Line 365: / Line 361: @@
 |-
 |06:59
-|We will leave it as it is.
+|We will leave it as it is.Next is the '''Reboiler Pressure'''.
-−
-|-
-|07:00
-|Next is the '''Reboiler Pressure'''.
 |-
@@ Line 381: / Line 373: @@
 |-
 | 07:16
-| Locate the '''Number of Stages''' option next.
+|Locate the '''Number of Stages''' option next.
 |-
@@ Line 397: / Line 389: @@
 |-
 |07:32
-|We plan to use a '''total condenser'''.
+|We plan to use a '''total condenser'''.So, this number should be one more than the equilibrium stages given by shortcut method.
-−
-|-
-|07:33
-|So, this number should be one more than the equilibrium stages given by shortcut method.
 |-
@@ Line 413: / Line 401: @@
 |-
 |07:50
-|Let us go back.
+|Let us go back.The next option is '''Edit Stages.''' Click it.
-−
-|-
-|07:51
-|The next option is '''Edit Stages.''' Click it.
 |-
@@ Line 572: / Line 556: @@
 |-
-| 11:13
+|11:13
-| Now we will select the solution method.
+|Now we will select the solution method.
 |-
@@ Line 773: / Line 757: @@
 |-
 | 15:20
-|Compare the results.
+|Compare the results.Compare the computation times.
-−
-|-
-| 15:21
-|Compare the computation times.
 |-

@@ Line 17: / Line 17: @@
 |-
 | 00:15
-|We will learn to specify column pressure profile.
+|We will learn to specify '''column pressure profile'''.
 |-
 | 00:20
-|We will see where to specify tray efficiencies.
+|We will see where to specify '''tray efficiencies'''.
 |-
@@ Line 81: / Line 81: @@
 |-
 | 01:31
-|I have already opened the file '''shortcut dash end dot dwxml'''.
+|I have already loaded the file '''shortcut dash end dot dwxml'''.
 |-
@@ Line 173: / Line 173: @@
 |-
 | 03:33
-|Press right click on the '''Shortcut column, '''and delete it.
+|Press right-click on the '''Shortcut column '''and '''delete''' it.
 |-
@@ Line 197: / Line 197: @@
 |-
 | 03:59
-| Go to '''Selected Object window.'''
+| Go to the '''Selected Object''' window.
 |-
@@ Line 213: / Line 213: @@
 |-
 | 04:13
-|Immediately after clicking it, a button appears at the right extreme.
+|Immediately after clicking it, a button appears at the right extreme;
 |-
 | 04:16
-|A button with three dots, click on it.
+|a button with three dots, click on it.
 |-
 | 04:21
-|Now there is a pop-up window.
+|Now, there is a pop-up window.
 |-
 | 04:23
-|Under the '''Feeds '''menu, click on the + button which is the '''Add '''button.
+|Under the '''Feeds '''menu, click on the + (plus) button which is the '''Add '''button.
 |-
 |04:29
-|Under '''To Stage '''column, the option is '''Condenser''', by default.
+|Under '''To Stage '''column, the option is '''Condenser''' by default.
 |-
 | 04:36
-|Here, we have to specify the stage at which '''feed''' enters.
+|Here, we have to specify the stage at which the '''feed''' enters.
 |-
@@ Line 245: / Line 245: @@
 |-
 | 04:49
-|We can see the list of stages.
+|We can see the list of '''stages'''.
 |-
 | 04:51
-|Select the stage where we want the feed to enter the '''Distillation column'''.
+|Select the '''stage''' where we want the '''feed''' to enter the '''Distillation column'''.
 |-
@@ Line 277: / Line 277: @@
 |-
 | 05:17
-|The actual connection will be done later in the flowsheet.
+|The actual connection will be done later in the '''flowsheet'''.
 |-
@@ Line 285: / Line 285: @@
 |-
 | 05:27
-|Let us see it in the slide, we see the optimal feed location to be six.
+|Let us see it in the slide, we see the '''optimal feed location''' to be six.
 |-
 | 05:31
-|Let us go back to DWSIM.
+|Let us go back to '''DWSIM'''.
 |-
 | 05:35
-| In a similar way, you have to pair the product streams.
+| In a similar way, we have to pair the '''product streams'''.
 |-
 | 05:39
-|Pair the '''Condenser''' to '''Distillate.'''
+|Pair the '''Condenser''' to '''Distillate''',
 |-
 | 05:42
-|Pair the '''Reboiler '''to '''Bottoms.'''
+|pair the '''Reboiler '''to '''Bottoms.'''
 |-
 | 05:46
-| Now, we will connect heat duties to reboiler and condenser.
+| Now, we will connect '''heat duties''' to '''reboiler''' and '''condenser'''.
 |-
@@ Line 333: / Line 333: @@
 |-
 | 06:21
-|Let me close this.
+|Let me '''close''' this.
 |-
@@ Line 353: / Line 353: @@
 |-
 |06:44
-|This section is used to specify the various attributes of a Distillation Column.
+|This section is used to specify the various attributes of a '''Distillation Column'''.
 |-
@@ Line 377: / Line 377: @@
 |-
 |07:09
-|Using this, I will show how to establish a linear profile in the column.
+|Using this, I will show how to establish a '''linear profile''' in the '''column'''.
 |-
@@ Line 385: / Line 385: @@
 |-
 |07:20
-|You have to enter the total number of trays here.
+|You have to enter the total number of '''tray'''s here.
 |-
@@ Line 397: / Line 397: @@
 |-
 |07:32
-|We plan to use a total condenser.
+|We plan to use a '''total condenser'''.
 |-
@@ Line 425: / Line 425: @@
 |-
 |08:01
-|It shows the condenser and reboiler pressures at 1 and 1.1 atmosphere.
+|It shows the '''condenser''' and '''reboiler pressures''' at 1 and 1.1 atmosphere.
 |-
@@ Line 433: / Line 433: @@
 |-
 |08:12
-|The New stages that have been added have been assigned zero pressures, which is incorrect.
+|The new stages that have been added have been assigned zero pressures which is incorrect.
 |-
 |08:20
-|We would like infact all the intermediates stage pressures to take interpolated values.
+|We would like, infact, all the intermediates stage pressures to take interpolated values.
 |-
 |08:28
-|Go to the left column and click the interpolation symbol at the bottom.
+|Go to the left column and click the '''interpolation''' symbol at the bottom.
 |-
@@ Line 453: / Line 453: @@
 |-
 |08:47
-|For example, I will click this pressure and change it to one atmosphere.
+|For example, I will click this pressure and change it to one (1) atmosphere.
 |-
 |08:56
-|Let me undo this by pressing the interpolated values again.
+|Let me '''undo''' this by pressing the interpolated values again.
 |-