Difference between revisions of "DWSIM-3.4/C2/Introduction-to-Flowsheeting/English"

We will simulate a mixer

Follow it up with a flash separator

Learn how to give a two phase feed

The prerequisite tutorials are mentioned on our website, spoken hyphen tutorial dot org.

I have already opened a file flow-begin with two material streams.

I went through file menu and the open option to get this.

Let me close this.

This file is available at our spoken tutorial website.

You may download this and use it.

Or you can manually enter the required information.

You can see two streams Inlet1 and Inlet2 in the flowsheet canvas.

When we mix these streams, we get equimolar composition.

We have chosen these values to easily verify the calculations of DWSIM.

Select Inlet 1.

Click on it.

Enter 1 as its value.

That is, the entire stream is a vapor.

Locate the Mixer from the object palette.

It is the third entry.

Click and drag it to the flowsheet.

Click on the Appearance tab.

Click on Material Stream and drag it to the flowsheet.

We will close the automatic pop up, and not enter anything.

Because, all output streams should be left unspecified.

Let me click the mixer once.

You can see that the mixer has up to 6 inlet streams.

Let us click on Inlet Stream 1.

Click this arrow. vapor

Choose Inlet1.

Click it and choose mixer-out.

To the right of the configure simulation tab is calculator.

It has several options.

Press it.

Click this button.

The mixer has become blue now.It means that the calculations are completed.

We can see its calculated values in the Properties tab.

We can verify that its composition is as expected. Double click Mixture

It has equimolar composition.

Let us scroll down the Object Palette.

Let us scroll down and locate the Separator Vessel.

It can be used to simulate VLE, LLE and VLLE systems.

Click and drag it to the flowsheet.

Let us drag the material stream.

We will leave it unspecified, as its properties are to be calculated.

In the first input port, we will connect mixer-out.

We can connect a total of five more input streams.

The separator mixes all the streams and separates.

As a matter of fact, a separate mixer is not really required.

It also has a port to connect an energy stream.

As we can see.

These ideas will be taken up in the assignment section.

Once again, we can move the items for better alignment.

You are free to press the Recalculate button also.

In fact you should do this whenever you are in doubt.

The mole fraction of Benzene is 0.54.

You can see that DWSIM automatically displays vapor value

benzene mole fraction is 0.54.

This is an indirect evidence that the Separator is working as expected.

We can do a check on the working of the Mixer also.

You can see the Mixture composition is equimolar, as expected.

I suggest that you keep saving your work frequently.

Explained how to create mixed feed.

Introduced mixer and separator.

Showed how to connect them.

Explained how to simulate.

I use blue colour to indicate streams and equipment.

Recall that we mentioned that it could be used to mix streams.

Remove the mixer and mixer-out and try it out.

Connect this stream to the Energy Stream of the Separator that I showed earlier.

Simulate and analyse your results.

This is summarised in the slide.

If you do not have good bandwidth, you may download and watch it.

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