DWSIM/C2/Binary-Phase-Envelope/English-timed

Time	Narration
00:01	Welcome to this spoken tutorial on Binary Phase Envelope in DWSIM.
00:07	In this tutorial, we will learn to generate: Txy plot at given pressure,
00:14	xy plot for the obtained Txy data,
00:18	Pxy plot at given temperature.
00:22	To record this tutorial, I am using DWSIM 5.2 (Classic UI) and Windows 10.
00:32	The process demonstrated in this tutorial is identical in other OS also, such as- Linux, Mac OS X or FOSSEE OS on ARM.
00:44	To practice this tutorial, you should know to : add components to a flowsheet,
00:51	Select thermodynamic packages,
00:54	add material streams and specify their properties.
00:59	The pre-requisite tutorials are mentioned on our website.
01:04	You can access these tutorials and all the associated files from this site.
01:10	In this tutorial, using DWSIM, we will generate: Txy plot at a constant pressure of 1.013 bar,
01:21	xy plot for the obtained Txy data,
01:25	Pxy plot at a constant temperature of 75 degree centigrade.
01:31	Here we give compounds, inlet stream conditions and property package.
01:38	I have already opened DWSIM on my machine.
01:43	Go to File menu and select New Steady-state Simulation.
01:50	Simulation Configuration Wizard window appears.
01:54	At the bottom, click on the Next button.
01:58	Now, in the Compounds Search tab, type Ethanol.
02:04	Select Ethanol from ChemSep database.
02:08	Similarly, add 1-propanol.
02:12	At the bottom, click on the Next button.
02:16	The Property Packages opens.
02:19	From Available Property Packages list, double-click on Soave-Redlich-Kwong (SRK).
02:26	Then click on the Next button.
02:30	We are moved to a new window named Flash Algorithm.
02:35	From Default Flash Algorithm select Nested Loops(VLE).
02:41	At the bottom, click on the Next button.
02:45	Next option is System of Units.
02:49	Under System of Units, select C5.
02:54	At the bottom, click on the Finish button.
02:58	Let us maximize the simulation window for better visibility.
03:03	Let’s insert a material stream for which we have to generate the Txy, xy and Pxy plots.
03:12	On the right hand side of the main simulation window, go to Flowsheet Objects.
03:19	In the Filter List tab, type Material Stream.
03:24	From the displayed list, drag and drop a Material Stream to the Flowsheet.
03:30	Click on the Material Stream “MSTR-000” to view its properties.
03:37	Let’s change the name of this stream to Feed.
03:41	Now we will specify the Feed stream properties.
03:46	Go to Input Data.
03:48	Select Flash Spec as Temperature and Pressure (TP), if not already selected.
03:55	By default, Temperature and Pressure are already selected as Flash Spec.
04:01	Change Temperature to 30 degree Centigrade and press Enter.
04:07	Change Pressure to 3.5 bar and press Enter.
04:13	Change Molar Flow to 120 kmol/h and press Enter.
04:20	Now, let us specify the feed stream compositions.
04:25	Under Composition, choose the Basis as Mole Fractions, if not already selected.
04:33	By default, Mole Fractions will be selected as Basis.
04:38	For Ethanol, enter the Amount as 0.5 and press Enter.
04:46	Similarly, for 1-propanol, enter it as 0.5 and press Enter.
04:54	On the right side, click on this green tick to Accept Changes.
04:59	Now ,we will see how property package calculates phase equilibrium data of compounds.
05:06	To do this, go to Utilities.
05:10	Click on Add Utility.
05:13	In the Add Utility window, under Object Type, select Material Streams.
05:20	Under Utility Type, select Binary Phase Envelope.
05:25	Under Flowsheet Object, select Feed.
05:29	At the bottom, click on the Add Utility button.
05:34	Binary Phase Envelope window opens.
05:37	Let us adjust the phase envelope window for better visibility.
05:43	Enter Name as Txy-plot.
05:49	Go to Diagram Settings.
05:52	Select Ethanol as Compound 1, if not already selected.
05:57	By default, Ethanol is selected as Compound 1.
06:02	Make sure that the other compound is selected as Compound 2.
06:07	In this case, it is 1-propanol which is Compound 2.
06:12	Select Envelope type as Txy, if not already selected.
06:19	By default, Txy is selected as Envelope type.
06:24	Select Txy Diagram Options as VLE, if not already selected.
06:31	By default, VLE is selected as Txy Diagram Options.
06:36	Select X-Axis Basis as Mole Fraction, if not already selected.
06:43	By default, Mole Fraction is selected as X-Axis Basis
06:48	Enter Pressure as 1.013 bar.
06:53	Here we are going to plot a Txy diagram.
06:56	So, let's not worry about the pressure value.
07:00	Make sure that the property package is selected as Soave-Redlich-Kwong.
07:07	Now click on Calculate button at the bottom.
07:12	The diagram generated is a Txy diagram or Constant Pressure Phase Diagram.
07:19	X-axis indicates the mole fraction of Ethanol.
07:23	Y -axis indicates the temperature range for which the VLE is generated.
07:29	The lower line of the envelope represents Bubble Point Curve.
07:34	Hover the mouse to the lower line at Ethanol mole fraction of 0.5.
07:40	We can see the bubble point temperature to be 86.2853 degree Centigrade.
07:47	For any mixture composition below this line, is subcooled liquid.
07:52	The upper line of the envelope represents Dew Point Curve.
07:57	Hover the mouse to the upper line at Ethanol mole fraction of 0.5.
08:03	We can see the dew point temperature to be 89.5881 degree Centigrade
08:10	For any mixture composition above this line, the mixture is superheated vapour.
08:16	The area enclosed between these two lines is the VLE region.
08:21	Here, both vapor and liquid phases exist in equilibrium.
08:26	We can see the bubble points and dew points at every composition.
08:32	For this, go to Results section and click on Table.
08:37	Here we can see the corresponding mole fractions and temperatures values.
08:43	Let us now generate the xy plot for data obtained in the above Txy diagram.
08:49	Close this window.
08:53	Go to Utilities and click on Add Utility.
08:58	In the Add Utility window, under Object Type, select Material Streams.
09:06	Under Utility Type, select Binary Phase Envelope.
09:11	Under Flowsheet Object, select Feed.
09:15	At the bottom, click on the Add Utility button.
09:19	Once again, Binary Phase Envelope window opens.
09:23	Let us adjust the window for better visibility.
09:27	Enter Name as xy-plot.
09:32	Go to Diagram Settings.
09:35	Let the Compound settings be the default settings.
09:39	Select Envelope type as (T)xy.
09:44	Select X-Axis Basis as Mole Fraction, if not already selected.
09:51	By default, Mole Fraction is selected as X-Axis Basis.
09:56	Enter Pressure as 1.013 bar.
10:01	Now click on the Calculate button at the bottom.
10:05	The diagram is generated is called xy diagram.
10:09	X-axis indicates the mole fraction of Ethanol in liquid phase.
10:15	Y -axis indicates the mole fraction of Ethanol in vapour phase.
10:20	The upper curve is called Equilibrium Curve.
10:24	Hover the mouse to the upper line at Ethanol mole fraction of 0.6.
10:30	We can see the vapour phase mole fraction of Ethanol to be 0.7539.
10:37	Let us generate the Pxy plot now.
10:41	Close this window.
10:45	Go to Utilities and click on Add Utility.
10:50	In the Add Utility window, under Object Type, select Material Streams.
10:57	Under Utility Type, select Binary Phase Envelope.
11:02	Under Flowsheet Object, select Feed.
11:06	At the bottom, click on the Add Utility button.
11:10	Once again, Binary Phase Envelope window opens.
11:14	Let us adjust the window for better visibility.
11:18	Enter Name as Pxy-plot.
11:23	Go to Diagram Settings.
11:25	Let the Compound settings be the default settings.
11:29	Select Envelope type as Pxy.
11:33	Select X-Axis Basis as Mole Fraction, if not already selected.
11:39	By default, Mole Fraction is selected as X-Axis Basis.
11:44	Enter Temperature as 75 degree Centigrade.
11:49	Here, we are going to plot a Pxy diagram.
11:53	So, let us not worry about the temperature value.
11:57	Make sure that the property package is selected as Soave-Redlich-Kwong.
12:03	Now, click on Calculate button at the bottom.
12:07	The diagram generated is a Pxy diagram or Constant Temperature Phase Diagram.
12:13	X-axis indicates the mole fraction of Ethanol.
12:17	Y -axis indicates the pressure range for which the VLE is generated.
12:23	The lower line of the envelope represents Dew Points.
12:28	Hover the mouse to the lower line at Ethanol mole fraction of 0.4.
12:34	We can see the dew point pressure to be 0.523 bar.
12:39	For any mixture composition below this line, is completely vapour.
12:45	The upper line of the envelope represents Bubble Points.
12:49	Hover the mouse to the upper line at Ethanol mole fraction of 0.8.
12:55	We can see the bubble point pressure to be 0.782 bar.
13:01	For any mixture composition above this line, is completely liquid.
13:06	The area enclosed between these two lines is the VLE region.
13:11	Here, both vapor and liquid phases exist in equilibrium.
13:16	Now, go to Results section. Click on Table.
13:21	Here we can see the corresponding mole fractions and pressure values.
13:27	Let's summarize.
13:29	In this tutorial, we have learnt to generate: Txy plot at given pressure,
13:34	xy plot for the obtained Txy data,
13:38	Pxy plot at given temperature.
13:41	As an assignment, generate P(xy) plot for the Pxy data obtained.
13:47	Generate P(xy) plot using NRTL model.
13:51	Compare the results.
13:53	Watch the video available at following link.
13:56	It summarizes the Spoken Tutorial project.
14:00	The Spoken Tutorial Project Team conducts workshops and gives certificates. For more details, please write to us.
14:09	Please post your times queries in this forum.
14:13	The FOSSEE team coordinates conversion of existing flow sheets into DWSIM. We give honorarium and certificates.
14:22	For more details, please visit this site.
14:26	The FOSSEE team coordinates coding of solved examples of popular books.
14:31	We give honorarium and certificates. For more details, please visit this site.
14:37	The FOSSEE team helps migrate commercial simulator labs to DWSIM.
14:43	We give honorarium and certificates. For more details, please visit this site.
14:49	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
14:57	This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining.

Contributors and Content Editors

PoojaMoolya, Sandhya.np14