DWSIM/C2/Introduction-to-Flowsheeting/English-timed

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Time Narration
00:01 Welcome to this tutorial on Introduction to flowsheeting in DWSIM
00:07 In this tutorial, we will learn to:
00:10 Simulate a mixer
00:12 Follow it up with a flash separator
00:15 Give a two phase feed
00:17 This tutorial is recorded using

DWSIM version 5. 8 (Classic UI) Update 3 and Windows 10 OS

00:27 But, this process is identical in Linux, Mac OS X or FOSSEE OS on ARM.
00:35 To practice this tutorial, you should have an introductory exposure to DWSIM.
00:41 The prerequisite DWSIM tutorials are mentioned on our website.
00:47 flow-begin file used in the tutorial is provided as a Code file on this tutorial page.
00:54 Download the file from Code Files link.
00:58 I have already opened DWSIM on my machine.
01:02 Please ensure that DWSIM opens as an administrator.
01:07 Go to File menu and click on Open File.
01:12 I have already downloaded and extracted the flow-begin file on my Desktop.
01:18 Select the file from the Desktop.
01:22 This file already contains all the material streams necessary for this tutorial.
01:28 You can see two streams Inlet1 and Inlet2 in the flowsheet canvas.
01:34 Let us go back to the slides.
01:37 It summarises the contents of this file.
01:41 When we mix these streams, we get equimolar composition.
01:46 Let us go back to DWSIM.
01:49 We will now modify the streams, so as to have vapor in them.

Select Inlet 1.

01:57 On the left, go to the Property Editor Window.
02:01 Go to Input Data.
02:03 Under Stream Conditions tab, select Flash Spec as Pressure and Vapor Fraction. (PVF)
02:11 Type Vapor Phase Mole Fraction as 1 and press Enter.

Here the entire stream is a vapor.

02:21 In a similar way, make Inlet2 to have 50% vapor fraction.
02:27 Select Inlet 2.
02:30 Under Stream Conditions tab, select Flash Spec as Pressure and Vapor Fraction. (PVF)
02:39 Type Vapor Phase Mole Fraction as 0.5 and press Enter.
02:45 Now let us insert a mixer to the flowsheet.
02:49 At the bottom of the main simulation window, go to Mixers/Splitters.
02:55 From the displayed list, drag and drop a Stream Mixer to the Flowsheet
03:00 Click on the mixer named MIX 002.
03:05 Let's change the name of MIX 002 to Mixer.

Press Enter.

03:10 Now let us insert an output stream for the mixer.
03:14 Click on Streams tab.

From the displayed list, drag and drop a Material Stream to the Flowsheet.

03:21 We will leave that stream as unspecified.
03:24 Let’s change the name of this stream to mixer-out.

Press Enter.

03:31 We are now ready to specify the Mixer.

So let’s click on it.

03:36 On the left, we can see a tab displaying properties related to the Mixer.
03:42 Here we can see that the mixer has up to 6 inlet streams.
03:48 Under Connections, click on the drop-down against Inlet Stream 1.

Select Inlet1.

03:57 Click on the drop down against Inlet Stream 2 and select Inlet2.
04:04 Click on the drop down against Outlet Stream and select mixer-out.
04:11 We can move the streams to make them better aligned.
04:15 The mixer is red, as it is not simulated yet.
04:19 Click on the mixer.
04:22 Go to Calculation Parameters.
04:25 Click on the drop-down against Pressure Calculation.
04:30 We can see there are three different modes of Pressure Calculation:

Inlet Minimum, Inlet Average, Inlet Maximum

04:40 Select Inlet Minimum if outlet pressure has to be minimum of all inlet streams.
04:47 Select Inlet Average if outlet pressure has to be average of all inlet streams.
04:53 Select Inlet Maximum if outlet pressure has to be maximum of all inlet streams.
05:00 Here both the inlet streams are at 1 atmosphere pressure.
05:06 So, the Pressure Calculation mode will not matter here.
05:10 By default, Inlet Minimum is selected, we will leave it unchanged.
05:16 Now we will run the simulation.
05:19 So, click on the Solve Flowsheet button on the toolbar.
05:24 The mixer has become blue now.
05:27 It means that the calculations are completed.
05:31 Now click on mixer out stream.
05:34 Go to the Property Editor Window of the Mixer.
05:38 Locate Results tab.
05:41 Navigate to Compounds Amounts Mixture.
05:47 We can verify that its composition is as expected.
05:52 It has equimolar composition.
05:56 Now let us insert a Gas-Liquid Separator.
06:00 It can be used to simulate VLE, LLE and VLLE systems.
06:06 At the bottom of the main simulation window, go to Separators/Tanks.
06:12 From the displayed list, drag and drop a Gas-Liquid Separator to the Flowsheet.
06:18 Click on the Gas-Liquid Separator named SEP-004.
06:24 Now we will connect two output streams to the Separator.
06:29 Drag and drop a Material Stream to the flowsheet area.
06:33 We will leave that stream as unspecified, as its properties are to be calculated.
06:40 We will name it as Vapour.
06:43 Similarly, add another material stream and name it as Liquid.
06:49 We are now ready to specify the Gas-Liquid Separator.

So let’s click on it.

06:56 On the left, we can see a tab displaying properties related to the Gas-Liquid Separator.
07:03 Under Connections, click on the drop-down against Inlet Stream 1.

Select mixer-out.

07:12 We can now connect a total of five more input streams.
07:16 The Separator mixes all the streams and separates.
07:21 It also has a port to connect an Energy Stream.
07:25 Click on the drop-down against Vapour Stream and select Vapour.
07:31 Similarly, click on the drop-down against Light Liquid Stream.

Select Liquid.

07:39 Then click on Solve Flowsheet button on the toolbar.
07:43 Now we will check whether the vapor and liquid are split properly in the separator.
07:50 Now click on Vapour stream.
07:53 From the Property Editor Window, locate Results section.
07:58 Navigate to Compounds Amounts Mixture.
08:03 The mole fraction of Benzene is 0.55.
08:08 We can do a check on the working of the Mixer also.
08:12 Now click on mixer-out.

From the Property Editor Window, locate Results section.

08:20 Navigate to Compounds Amounts Vapor.
08:26 The mole fraction of Benzene is 0.55.
08:30 Let us now save this file using the Save As option.
08:35 I will save it as flow end.
08:40 Let's summarise.
08:41 In this tutorial, we have learnt to

Simulate a mixer, Follow it up with a flash separator and Give a two phase feed

08:50 Here are some assignments for you.
08:53 The assignment in this slide has to do with mass balances.
08:57 I use blue colour to indicate streams and equipment.
09:02 Let us go to the next assignment.
09:06 You have to verify mole fractions as mentioned in this slide.
09:10 The third assignment has to do with the Separator.
09:14 Recall that we mentioned that it could be used to mix streams.
09:19 Remove the mixer and mixer-out and try it out.
09:23 See if you get the same answers.
09:27 In the next assignment, you will do the separation at a higher temperature.
09:32 Click on Separator
09:33 From the Property Editor Window.Go to Calculation Parameter Window

Select Override separation temperature checkbox

09:43 In the Resulting field change the value to 100
09:48 Bring Energy stream from Object Palette to the flowsheet.
09:52 Connect this stream to the Energy stream of the Separator.
09:57 Simulate and analyse your results.
10:01 Watch the video available at the following link.

It summarizes the Spoken Tutorial project.

10:08 The Spoken Tutorial Project Team conducts workshops and gives certificates.

For more details, please write to us.

10:17 Please post your timed queries in this forum.
10:21 The FOSSEE team coordinates conversion of existing flowsheets into DWSIM.
10:27 We give honorarium and certificates for those who do this.

For more details, please visit this site.

10:36 The FOSSEE team helps migrate commercial simulator labs to DWSIM.
10:42 We give honorarium and certificates for those who do this.

For more details, please visit this site

10:51 Spoken Tutorial and FOSSEE projects are funded by NMEICT, MHRD, Government of India.
11:00 We thank the DWSIM team for making it as an open source software.
11:05 This tutorial was originally recorded by Prof Kannan Moudgalya in May 2015.

This is Kaushik Datta from IIT Bombay. Thanks for joining.

Contributors and Content Editors

PoojaMoolya