DWSIM/C2/Calculation-of-Bubble-Points-and-Dew-Points/English-timed

Time	Narration
00:01	Welcome to this tutorial on Calculation of Bubble Points and Dew Points in DWSIM.
00:07	In this tutorial, we will learn to generate: Bubble Point Temperature at a given pressure,
00:15	Dew Point Temperature at a given pressure.
00:19	To record this tutorial, I am using DWSIM 5.2 (Classic UI) and Windows 10.
00:28	The process demonstrated in this tutorial is identical in other OS also such as- Linux, Mac OS X or FOSSEE OS on ARM.
00:40	To practice this tutorial, you should know to: add components to a flowsheet,
00:46	select thermodynamic packages and add material stream and specify their properties.
00:54	The prerequisite tutorials are mentioned on our website spoken-tutorial.org
00:59	You can access these tutorials and all the associated files from this site.
01:05	In this tutorial, using DWSIM, we will calculate: 1) Bubble Point Temperature at 2 bar 2) Dew Point Temperature at 10 bar
01:15	Here we provide the compounds, inlet stream conditions and property package.
01:21	I have already opened DWSIM on my machine.
01:26	Go to File menu and select New Steady-state Simulation.
01:33	Simulation Configuration Wizard window appears.
01:37	At the bottom, click on the Next button.
01:41	Now, in the Compounds Search tab, type: Methane.
01:46	Select Methane from ChemSep database.
01:50	Next, we will add Ethane.
01:54	Similarly, add Propane.
01:58	Next, add Isobutane.
02:02	Followed by N-butane.
02:06	Similarly, add Isopentane.
02:10	Then add N-pentane.
02:14	At the bottom of the window, click on the Next button.
02:18	The Property Packages opens.
02:21	From Available Property Package list, double-click on Soave-Redlich-Kwong.
02:28	Then click on the Next button.
02:31	We are moved to a new window named Flash Algorithm.
02:36	From Default Flash Algorithm, select Nested Loops(VLE).
02:41	Click on the Next button at the bottom.
02:44	The next option is System of Units.
02:48	Under System of Units, select C5.
02:52	At the bottom, click on the Finish button.
02:55	Let us maximize the simulation window for better visibility.
03:00	Now let’s insert a material stream for which we have to calculate Bubble points and Dew points.
03:07	On the right hand side of the main simulation window, go to Flowsheet Objects.
03:12	In the Filter List tab, type: Material Stream.
03:17	From the displayed list, drag and drop a Material Stream to the Flowsheet.
03:23	Click on the Material Stream “MSTR-000” to view its properties.
03:29	Let’s change the name of this stream to Feed.
03:33	Now we will specify the Feed stream properties.
03:37	Go to the Input Data.
03:39	Select Flash Spec as Temperature and Pressure (TP), if not already selected.
03:44	By default, Temperature and Pressure are already selected as Flash Spec.
03:50	Change Temperature to 25 degree Celsius and press Enter.
03:56	Change Pressure to 5 bar and press Enter.
04:00	Now, let us specify the feed stream compositions.
04:05	Under Composition, choose the Basis as Mole Fractions, if not already selected.
04:13	By default, Mole Fractions is selected as Basis.
04:18	Now, for Methane, type the Amount as 0.05 and press Enter.
04:26	For Ethane, type it as 0.1 and press Enter.
04:33	Similarly, for Propane, type 0.15 and press Enter.
04:39	And for Isobutane, type 0.1 and press Enter.
04:45	Next, for N-butane, type 0.2 and press Enter.
04:51	For Isopentane, type 0.25 and press Enter.
04:57	Lastly, for N-pentane, type 0.15 and press Enter.
05:04	On the right, click on this green tick to Accept Changes.
05:08	Now we will see how property package calculates phase equilibrium data of compounds.
05:14	To do this, go to Utilities.
05:17	Click on Add Utility.
05:20	In the Add Utility window, under Object Type, select Material Streams.
05:27	Under Utility Type, select Phase Envelope.
05:31	Under Flowsheet Object, select Feed.
05:35	Then, at the bottom, click on the Add Utility button.
05:40	Phase Envelope window opens.
05:43	Let us adjust the Phase Envelope window for better visibility.
05:49	Enter Name as BubblePoint-DewPoint.
05:55	Under Settings, click on Bubble Points tab.
06:00	Select the check box against Custom Initialization.
06:05	We are going to calculate bubble point temperature against given pressure.
06:10	So, let Initial Flash method be PVF.
06:14	Here, we will change only Initial Pressure and Pressure Step.
06:19	Type Initial Pressure as 1 bar and press Enter.
06:24	Type Pressure Step as 1 bar and press Enter.
06:30	We will not change any temperature value as we are doing a PVF Flash.
06:36	Now, go to Dew Points tab.
06:39	We will repeat the same process as Bubble Points Initialization.
06:44	Select the check box against Custom Initialization.
06:49	We are going to calculate dew point temperature against given pressure.
06:54	So, here also let the Initial Flash method be PVF.
06:59	Hence we will change only Initial Pressure and Pressure Step
07:04	Type Initial Pressure as 1 bar and press Enter.
07:10	Type Pressure Step as 1 bar and press Enter.
07:16	Now click on the Calculate button at the bottom.
07:20	The calculation process is running in the background.
07:25	We can see the dew points and bubble points generated at different pressure and temperatures.
07:32	Under Results, click on Table.
07:36	In the column Pb, look for 2 bar at which we had to calculate the bubble point. Here is 2 bar under Pb column.
07:45	Look for temperature in Tb column corresponding to 2 bar.
07:50	We can see the bubble point temperature to be minus 91.9274 degree Celcius
07:58	Next, we have to find Dew point temperature at 10 bar.
08:03	In the column Pd, look for 10 bar at which we have to find the dew point.
08:09	Here is 10 bar under Pd column.
08:12	Look for temperature in Td column corresponding to 10 bar.
08:17	We can see the dew point temperature to be 87.396 degree Celcius.
08:24	There is an alternative way by which we can verify the correctness of the above results.
08:30	For this, let’s get back to flowsheet window.
08:34	Click on Feed.
08:37	Under Input data, select Flash Spec as Pressure and Vapor Fraction (PVF).
08:44	Type Vapor Phase Mole Fraction as 0 and press Enter.
08:50	And, Pressure as 2 bar and press Enter.
08:56	Now check the temperature which is minus 91.9274 degree C.
09:03	This is the bubble point temperature at 2 bar pressure.
09:07	It matches the value obtained earlier from Phase envelope.
09:11	Similarly, let’s check for Dew point temperature.
09:16	Let the Flash Spec be same as Pressure and Vapor Fraction (PVF).
09:21	Type Vapor Phase Mole Fraction as 1 and press Enter.
09:27	And Pressure as 10 bar and press Enter.
09:32	Now, check the temperature which is 87.396 degree C.
09:38	This is the dew point temperature at 10 bar pressure.
09:42	It matches the value obtained earlier from Phase envelope.
09:46	Let's summarize.
09:48	In this tutorial, we have learnt to generate: Bubble Point Temperature at a given pressure,
09:54	Dew Point Temperature at a given pressure.
09:57	As an assignment, calculate the following for the given component system and inlet conditions.
10:04	Calculate Bubble Point Pressure at 20 degree Celsius.
10:08	Calculate Dew Point Pressure at 60 degree Celsius.
10:12	Watch the video available at following link. http://spoken-tutorial.org/ It summarizes the Spoken Tutorial project.
10:19	The Spoken Tutorial Project Team conducts workshops and gives certificates. For more details, please write to us.
10:26	Please post your times queries in this forum.
10:31	The FOSSEE team coordinates conversion of existing flow sheets into DWSIM.
10:37	We give honorarium and certificates.
10:40	For more details, please visit this site.
10:43	The FOSSEE team coordinates coding of solved examples of popular books.
10:48	We give honorarium and certificates. For more details, please visit this site.
10:55	The FOSSEE team helps migrate commercial simulator labs to DWSIM.
11:01	We give honorarium and certificates. For more details, please visit this site
11:08	Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
11:16	This tutorial is contributed by Kaushik Datta and Priyam Nayak. Thanks for joining.

Contributors and Content Editors

PoojaMoolya, Sandhya.np14