DWSIM/C2/Rigorous-Distillation/English-timed

Time	Narration
00:01	Welcome to this tutorial on Simulating a Rigorous Distillation column in DWSIM.
00:07	In this tutorial, we will learn to:
00:10	Simulate a Rigorous Distillation column
00:13	Specify column Pressure Profile
00:16	Specify Tray Efficiencies
00:19	Check desired product compositions and
00:22	View the Column profiles
00:25	This tutorial is recorded using DWSIM 5. 8 (Classic UI) Update 3 and Windows 10 OS.
00:36	But, this process is identical in Linux, Mac OS X or FOSSEE OS on ARM.
00:44	To practise this tutorial, you should know to- Add components to a flowsheet
00:50	Select thermodynamic packages
00:53	Add material and energy streams and specify their properties.
00:58	The prerequisite tutorials are available on this website.
01:03	You can access these tutorials and all the associated files from this site.
01:09	shortcut-end file used in the tutorial is provided as a Code file on this tutorial page.
01:17	Download the files from Code Files link.
01:21	I have already opened DWSIM on my machine.
01:26	I have opened the file shortcut-end.dwxmz.
01:32	Let me save this as rigorous.
01:37	We can see that the file name has changed now to rigorous.
01:42	Click on the Settings button on the toolbar.
01:46	Click on Systems of Units tab.
01:49	Locate Pressure menu on the right hand column.
01:53	Click and choose atm for atmosphere. Press Enter.
01:59	Similarly, change the units of Delta_P to atm. Press Enter.
02:06	Close the Settings window.
02:09	Let me switch to the slides.
02:12	This problem was solved in the spoken tutorial on Shortcut Distillation.
02:18	These values form the basis for the rigorous distillation column problem.
02:24	This represents the solution of the given problem using Shortcut Distillation.
02:30	We will be using these values shortly.
02:33	Let us begin by replacing the Shortcut column with a Rigorous column.
02:38	Let me go back to the simulation.
02:41	Right-click on the Shortcut column, and select delete. Click Yes in the prompt box.
02:49	At the bottom of the main simulation window, go to Columns tab.
02:54	From the displayed list, drag and drop a Distillation Column to the Flowsheet.
02:59	Let’s us now arrange it as required.
03:02	Click on the Distillation Column.
03:05	On the left, go to the Property Editor Window of the Distillation Column.
03:10	Now under Column Specs, click on the General tab.
03:15	Locate the Number of Stages option.
03:18	We have to enter the total number of trays here.
03:22	We got the equilibrium stages to be 20 from the shortcut method.
03:27	We can see it in the slide. Let us go back to DWSIM.
03:33	This number should be one more than the equilibrium stages given by shortcut method.
03:39	So, change the Number of Stages to 21 and press Enter.
03:46	This number includes the condenser also in DWSIM.
03:51	So here we will use a total condenser.
03:56	Now we will select the solution method.
03:59	Click on the drop-down against Solver.
04:03	Choose the Solver as Wang-Henke (Bubble Point), if not already selected.
04:09	By default, Wang-Henke (Bubble Point) is already selected as Solver.
04:15	Now we will connect the streams to the Distillation column.
04:20	Go to Column Configuration section.
04:23	Navigate to Connections >> Streams Connections >> Feeds
04:29	Here we have to specify the stream which is entered as a feed to the column.
04:35	Here, we can see the list of Feed Ports.
04:39	Select any port where we want the feed to enter the Distillation column.
04:44	For a better look, we select Column Feed Port 5.
04:48	Click on the down-down against Column Feed Port 5.
04:53	Select Feed and press Enter.
04:56	In a similar way, we will connect the product streams.
05:00	Now, click on the Products tab.
05:03	Select Distillate as Distillate and press Enter.
05:08	Select Bottoms as Bottoms and press Enter.
05:13	Now we will connect heat duties to reboiler and condenser.
05:18	Click on the Duties tab.
05:20	Select Reboiler Duty as R-Duty and press Enter.
05:25	Select Condenser Duty as C-Duty and press Enter.
05:31	Now under Connections, click on Stream-Stage Associations tab.
05:37	For Feed Port type, select Stage location as Stage9. Press Enter.
05:44	This is as per the solution we got in the Shortcut Distillation column.
05:49	We got the Optimal Feed Location to be 9 from the Shortcut method.
05:54	We can see it in the slide. Let us go back to DWSIM.
06:00	This completes the connections.
06:03	Now we have to provide the top and bottom specifications.
06:08	Under Properties tab, locate the section Column Specs.
06:13	Click on the Condenser tab.
06:16	Select Condenser Type as Total, if not already selected.
06:21	By default, it is total condenser. We will leave it as it is.
06:25	Change Condenser Pressure to 1 atmosphere and press Enter.
06:32	Select Condenser Pressure drop as 0. By default, it is 0. We will leave it as it is.
06:40	Next select the Specification as Reflux Ratio, if not already selected.
06:47	By default, Reflux Ratio is already selected as Specification.
06:53	Under Compound, we can see a field.
06:56	Here we can enter the value of reflux ratio.
07:00	We will enter the Reflux Ratio as 2.317. Press Enter.
07:06	Now click on Reboiler tab.
07:10	Change Reboiler Pressure to 1.1 atmosphere and press Enter.
07:16	Select Specification as Product Molar Flow, if not already selected.
07:22	Under Compound, change the units to kilomol per hour and press Enter.
07:29	Now enter the Molar flow rate as 60.204. Press Enter.
07:36	This is suggested by the shortcut solution. We can see it in the slide.
07:43	Let us go back to DWSIM.
07:46	Now we will also see how to specify the pressure for the intermediate stages.
07:53	Now go to Column Configuration section.
07:56	Click on Stages tab.
07:59	It shows the condenser and reboiler pressures as 1 and 1.1 atmosphere.
08:06	New stages that have been added, are assigned zero pressure, which is incorrect.
08:12	We would like the intermediate stage pressures to take the interpolated values.
08:18	Under Column Configuration section, go to the extreme left.
08:23	Here we can see 5 different icons. Hover the mouse to the last icon.
08:30	A popup is displayed as Estimate Stage Pressures by Interpolation. Click on the icon.
08:38	Immediately, linearly interpolated values are assigned to every stage.
08:44	We can also edit the pressure of the individual stages, if they are known.
08:50	We may also change the efficiency in one or more stages.
08:55	Now we will run the simulation.
08:58	Click on Solve Flowsheet button on the toolbar.
09:02	When the calculations are completed, click on the Distillation column.
09:07	Go to the Property Editor Window of the Distillation Column.
09:12	Locate the Results section.
09:15	This shows all the required results like Condenser Duty , Reboiler Duty and Column Profiles
09:23	Now let us look at the Column profiles.
09:27	Click on View Temperature, Pressure and Composition Profiles button.
09:33	Now we can see a pop-up window.
09:37	Here, we can see the- Temperature profiles, Flows profiles, Component flows and Component fractions
09:50	For the exact numbers, click on the Table tab to the right of the Graph tab.
09:56	Now save this file.
09:59	Let us summarize
10:03	In this tutorial, we have learnt to: Simulate a Rigorous Distillation column, Specify column Pressure Profile
10:11	Specify Tray Efficiencies, Check desired product compositions and View the Column profiles
10:20	Take the Assignment from the Shortcut Distillation column.
10:24	Perform the simulation using Rigorous Distillation.
10:28	Here is the assignment problem statement of the Shortcut Column.
10:33	With this, we have come to the end of this tutorial.
10:37	Watch the video available at the following link. It summarizes the Spoken Tutorial project.
10:45	The Spoken Tutorial Project Team, Conducts workshops and Gives certificates.
10:51	For more details, please write to us.
10:54	Please post your time queries in this forum.
10:58	The FOSSEE team coordinates conversion of existing flowsheets into DWSIM.
11:04	We give honorarium and certificates for those who do this. For more details, please visit this site.
11:13	The FOSSEE team helps migrate commercial simulator labs to DWSIM.
11:19	We give honorarium and certificates for those who do this. For more details, please visit this site
11:28	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
11:37	This tutorial was originally recorded by Prof Kannan Moudgalya in September 2015. This is Kaushik Datta from IIT Bombay. Thanks for joining.

Contributors and Content Editors

PoojaMoolya