DWSIM/C2/Shortcut-Distillation/English-timed

Time	Narration
00:01	Welcome to this tutorial on Simulating a Shortcut Distillation column in DWSIM.
00:07	In this tutorial, we will learn to:
00:10	Simulate a Shortcut distillation column
00:13	Calculate Minimum number of stages
00:16	Calculate Minimum reflux ratio
00:19	Calculate Optimal Feed stage location
00:22	Calculate Condenser and Reboiler duty
00:26	This tutorial is recorded using DWSIM version 5. 8 (Classic UI) Update 3 and Windows 10 OS
00:37	But, this process is identical in Linux, Mac OS X or FOSSEE OS on ARM.
00:43	To practise this tutorial, you should know to-
00:47	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 DWSIM tutorials are available on this website.
01:03	You can access these tutorials and all the associated files from this site.
01:09	We will develop a flowsheet to determine Outlet stream properties after Shortcut Distillation.
01:15	Here we give Compounds, Thermodynamics and Inlet stream conditions.
01:21	Next, we give Shortcut Column Properties.
01:25	I have already opened DWSIM.
01:28	Go to File menu and select New Steady-state Simulation.
01:33	Simulation Configuration Wizard window opens.
01:35	Click on Next button at the bottom.
01:40	In the Compounds Search tab, type Benzene.
01:45	Select Benzene from ChemSep database.
01:49	Similarly, add Toluene.
01:52	Click the Next button at the bottom.
01:56	Now comes Property Packages.
01:59	From Available Property Packages list, double-click on Raoult’s Law.
02:04	At the bottom, click on the Next button.
02:08	Next option is System of Units.
02:12	Under System of Units, select C5.
02:17	Pressure menu appears at the top of this list.
02:20	Select atm for atmosphere and press Enter.
02:25	Lastly, at the bottom, click on the Finish button.
02:30	Now maximize the Simulation window.
02:33	Now let’s insert a feed stream that has to be distilled.
02:38	At the bottom of the main simulation window, go to Streams.
02:43	From the displayed list, drag and drop a Material Stream to the Flowsheet.
02:48	Click on the material stream named MSTR 000.
02:53	Let’s change the name of this stream to Feed. Press Enter.
02:59	Now we will specify the Feed stream compositions.
03:03	For this under Input Data click on Compound Amounts tab.
03:09	Choose the Basis as Mole Fractions, if not already selected.
03:14	By default, Mole Fractions is already selected as Basis.
03:19	For Benzene enter 0.4 and press Enter.
03:24	For Toluene enter 0.6 and press Enter.
03:30	On the right, click on the Accept Changes button.
03:34	Now we will specify the Feed stream properties.
03:38	Go to Input Data.
03:40	Under Stream Conditions tab, select Flash Spec as Pressure and Vapor Fraction. (PVF)
03:48	Change Pressure to 1 atmosphere and press Enter.
03:53	Change Molar flow to 100 Kmol per hour and press Enter.
03:59	Now locate Vapor Phase Mole Fraction.
04:03	Here the default value is 0.
04:05	This indicates that the liquid is saturated. Let us leave it as it is.
04:10	Now let us insert a Shortcut Column into the flowsheet.
04:15	At the bottom of the main simulation window, go to Columns tab.
04:20	The Shortcut Column is based on Fenske-Underwood-Gilliland method.
04:25	From the displayed list, drag and drop a Shortcut Column to the Flowsheet
04:30	Now let us insert two output streams.
04:34	To do that, let us drag one Material Stream.
04:38	Leave that stream as unspecified.
04:42	Then we will change the name of this stream to Distillate.
04:47	Next, we will insert another Material Stream.
04:51	Leave that stream as unspecified.
04:54	Let us change the name of this stream to Bottoms. Press Enter.
05:00	Let us now insert two Energy streams for Condenser duty and Reboiler duty.
05:06	Go to Streams tab. From the displayed list, drag and drop two Energy Streams to the Flowsheet.
05:14	Let us now arrange it as required.
05:17	Name these streams as C-Duty and R-Duty.
05:23	We are now ready to specify the Shortcut distillation column. So let’s click on it.
05:29	On the left, we can see a tab displaying properties related to the Shortcut Column.
05:35	Under Connections, click on the drop-down against Feed Stream. Select Feed.
05:43	Click on the drop-down against Distillate Stream and select Distillate.
05:50	Click on the drop-down against Bottoms Stream and select Bottoms.
05:57	Click on the drop-down against Condenser Duty and select C-Duty.
06:04	Click on the drop-down against Reboiler Duty and select R-Duty.
06:10	This completes the connectivity of the flowsheet.
06:13	Now, go to the Calculation Parameters.
06:17	This section is used to specify various attributes of a Shortcut Column.
06:22	Click on the drop-down against Light Key Compound (LK) and select Benzene.
06:31	Click on the drop-down against Heavy Key Compound (HK) and select Toluene.
06:39	Now go to Condenser Type. By default, it is Total Condenser.
06:45	If a partial condenser is required, we can change it here.
06:49	Click on the field against LK Mole Fraction in Bottoms and enter it as 0.01 and press Enter.
06:58	Click on the field against HK Mole Fraction in Distillate and enter it as 0.01 Then press Enter.
07:08	Let us go back to the slides.
07:11	Recall that we want our reflux ratio to be 1.4 times the minimum reflux ratio.
07:18	So let us check the minimum reflux ratio.
07:22	For this, let us run simulation once.
07:26	To do this, click on Solve Flowsheet button.
07:30	Click on the Distillation Column.
07:33	From the Property Editor Window, locate Results section.
07:38	Now we can see that Minimum Reflux Ratio is 1.655. So the actual Reflux Ratio will become 2.317.
07:49	Next let us enter the reflux ratio.
07:53	Look at the Shortcut Column results.
07:56	Here note the Actual Number of Stages and Optimal Feed Stage. We can see that these values are NaN.
08:05	This is because the default value of reflux ratio is 1.5. It is less than minimum reflux ratio.
08:14	Now let us enter the Reflux Ratio.
08:18	Enter the value as 1.655 into 1.4 and press Enter.
08:26	Now the Reflux Ratio is 2.317.
08:31	Click on the field against Condenser Pressure and enter it as 1 atmosphere and press Enter.
08:40	Click on the field against Reboiler Pressure and enter it as 1 atmosphere . Then press Enter.
08:48	Now we will run the simulation.
08:51	To do this, click on the Solve Flowsheet button on the toolbar.
08:56	When calculations are completed, click on the Shortcut column.
09:01	From the Property Editor Window, locate Results section.
09:06	This shows all the required results like:
09:09	Minimum Reflux Ratio
09:11	Minimum Number of Stages
09:14	Actual Number of Stages
09:17	Optimal Feed Stage
09:19	Condenser Duty, Reboiler Duty, etc
09:24	I have tabulated these results in a slide.
09:28	Let us go back to the simulation.
09:31	Let me save this. I will save it as shortcut-end.
09:38	Let's summarize.
09:40	In this tutorial, we have learnt to:
09:42	Simulate a Shortcut distillation column, Calculate Minimum number of stages, Calculate Minimum reflux ratio, Calculate Optimal Feed stage location , Calculate Condenser and Reboiler duty
09:58	As an assignment, Repeat this simulation with different compounds., Different feed conditions.
10:06	Different Column Properties.
10:08	This brings us to the end of this tutorial.
10:11	Watch the video available at the following link. It summarizes the Spoken Tutorial project.
10:17	The Spoken Tutorial Project Team Conducts workshops and Gives certificates.
10:22	For more details, please write to us.
10:25	Please post your time queries in this forum.
10:29	The FOSSEE team coordinates conversion of existing flowsheets into DWSIM.
10:35	We give honorarium and certificates for those who do this. For more details, please visit this site.
10:44	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
10:58	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
11:07	We thank the DWSIM team for making it as an open source software. This tutorial was originally recorded by Prof Kannan Moudgalya in May 2015.
11:19	This is Kaushik Datta from IIT Bombay. Thanks for joining.

Contributors and Content Editors

PoojaMoolya