View source for DWSIM/C2/Calculation-of-Bubble-Points-and-Dew-Points/English



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||'''Visual Cue'''
||'''Narration'''
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||'''Slide Number 1'''

'''Title Slide'''
||Welcome to this tutorial on '''Calculation of Bubble Points and Dew Points''' in '''DWSIM.'''

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||'''Slide Number 2'''

'''Learning Objective'''
||In this tutorial, we will learn to generate:


* '''Bubble Point Temperature''' at a given pressure

* '''Dew Point Temperature '''at a given pressure

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|| '''Slide Number 3'''

'''System Requirements'''
||To record this tutorial, I am using


* '''DWSIM 5.2 (Classic UI)''' and

* '''Windows 10'''

The process demonstrated in this tutorial is identical in other OS also, such as-

* '''Linux''',

* '''Mac OS X '''or

* '''FOSSEE OS '''on '''ARM'''.
|-
||'''Slide Number 4'''

'''Pre-requisites '''
||To practice this tutorial, you should know to:


* Add components to a '''flowsheet'''

* Select '''thermodynamic '''packages and

* Add '''material stream''' and specify their properties.

|-
||'''Slide Number 5'''


'''Prerequisite Tutorials and Files'''
||The prerequisite tutorials are mentioned on our website, '''spoken-tutorial.org'''


You can access these tutorials and all the associated files from this site.

|-
||'''Slide Number 6'''


'''Feed Conditions'''


'''Inlet Stream:'''


Mole Fraction(Methane): 0.05

Mole Fraction(Ethane): 0.1

Mole Fraction(Propane): 0.15

Mole Fraction(Isobutane): 0.1

Mole Fraction(N-butane): 0.2

Mole Fraction(Isopentane): 0.25

Mole Fraction(N-pentane): 0.15

Temperature: 25 degree C 

Pressure: 5 bar


'''Property Package: '''Soave-Redlich-Kwong (SRK)
||In this tutorial, using '''DWSIM''', we will calculate:


1) '''Bubble Point Temperature''' at '''2 bar'''

2) '''Dew Point Temperature''' at '''10 bar'''



Here we provide the '''compounds, inlet stream conditions''' and '''property package'''.

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||
||I have already opened '''DWSIM '''on my machine. 

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||File >>'''New Steady-state Simulation '''
||Go to '''File '''menu and select '''New Steady-state Simulation.'''

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||Point to '''Simulation Configuration Wizard '''window
||'''Simulation Configuration Wizard '''window appears.

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||Click on '''Next'''.
||At the bottom, click on the '''Next '''button.

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||Type '''Methane '''in the '''Search '''tab
||Now, in the '''Compounds Search '''tab, type '''Methane.'''

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||'''ChemSep '''database >>'''Methane'''
||Select '''Methane '''from '''ChemSep '''database.

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||Type '''Ethane '''in the '''Search '''tab
||Next, we will add''' Ethane.'''

|-
||Type '''Propane '''in the '''Search '''tab
||Similarly, add '''Propane.'''

|-
||Type '''Isobutane '''in the '''Search '''tab
||Next, add '''Isobutane.'''

|-
||Type '''N-butane '''in the '''Search '''tab
||Followed by '''N-butane.'''

|-
||Type '''Isopentane '''in the '''Search '''tab
||Similarly, add '''Isopentane.'''

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||Type '''N-pentane '''in the '''Search '''tab
||Then add '''N-pentane.'''

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||Click on '''Next.'''
||At the bottom of the window, click on the '''Next '''button.

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||Point to''' Property Packages'''
||The '''Property Packages '''opens.

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||'''Property Packages'''>>'''Available Property Package'''


Double click on '''Soave-Redlich-Kwong (SRK)'''
||From '''Available Property Package '''list, double-click on '''Soave-Redlich-Kwong (SRK).'''

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||Click on '''Next '''button.
||Then click on the '''Next '''button.

|-
||Point to '''Flash Algorithm'''
||We are moved to a new window named '''Flash Algorithm'''.

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||'''Default Flash Algorithm '''>>'''Nested Loops (VLE)'''
||From '''Default Flash Algorithm '''select '''Nested Loops(VLE)'''

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||Click '''Next '''button.
||Click on the '''Next '''button at the bottom.

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||Point to '''System of Units'''
||The next option is '''System of Units.'''

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||'''System of Units >>C5'''
||Under '''System of Units''', select '''C5'''.

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||Click on '''Finish '''button.
||At the bottom, click on the '''Finish '''button.

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||Click on '''Maximize''' button.
||Let us maximize the '''simulation window '''for better visibility.

|-
||Cursor on the simulation window.
||Now let’s insert a '''material stream''' for which we have to calculate '''Bubble points''' and '''Dew points'''.

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||Point to '''Flowsheet Objects.'''
||On the right hand side of the main '''simulation window,''' go to '''Flowsheet Objects.'''

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||In the '''Filter List '''tab, type '''Material Stream'''
||In the '''Filter List '''tab, type '''Material Stream.'''

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||Click and drag '''Material Stream '''to the flowsheet
||From the displayed list, drag and drop a '''Material Stream '''to the '''Flowsheet'''.

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||Click on '''MSTR-000'''
||Click on the '''Material Stream “MSTR-000” '''to view its properties.

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||Type '''Feed'''
||Let’s change the name of this '''stream '''to '''Feed.'''

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||
||Now we will specify the '''Feed stream '''properties.

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||'''Input Data>>Flash Spec>>Temperature and Pressure(TP)'''
||Go to the '''Input Data.'''

Select '''Flash Spec '''as '''Temperature and Pressure (TP), '''if not already selected.

By default, '''Temperature and Pressure '''are already selected as '''Flash Spec.'''

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||'''Input Data >>Temperature >>25 degree C'''

Press '''Enter'''
||Change '''Temperature '''to '''25 degree Celsius '''and press '''Enter.'''

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||'''Input Data >>Pressure >>5bar'''

Press '''Enter'''
||Change '''Pressure '''to '''5 bar '''and press '''Enter'''.

|-
||
||Now let us specify the '''feed stream compositions'''.

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||'''Composition >>Basis >>Mole Fractions'''
||Under '''Composition''', choose the '''Basis '''as '''Mole Fractions, '''if not already selected.

By default, '''Mole Fractions '''is selected as '''Basis.'''

|-
||'''Methane: 0.05'''
||Now for '''Methane''', type the '''Amount '''as '''0.05 '''and press '''Enter.'''

|-
||'''Ethane: 0.1'''
||For '''Ethane, '''type it as '''0.1 '''and press '''Enter. '''

|-
||'''Propane: 0.15'''
||Similarly, for '''Propane, '''type '''0.15''' and press '''Enter. '''

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||'''Isobutane: 0.1'''
||And for '''Isobutane''', type '''0.1 '''and press '''Enter.'''

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||'''N-butane: 0.2'''
||Next, for '''N-butane''', type '''0.2 '''and press '''Enter.'''

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||'''Isopentane: 0.25'''
||For '''Isopentane''', type '''0.25 '''and press '''Enter.'''

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||'''N-pentane: 0.15'''
||Lastly, for '''N-pentane''', type '''0.15 '''and press '''Enter.'''

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||Point to the tick.

Click '''Accept Changes'''
||On the right, click on this green tick to '''Accept Changes.'''

|-
||Click on '''Utilities'''
||Now we will see how '''property package''' calculates '''phase equilibrium''' data of '''compounds'''.

To do this, go to '''Utilities'''.

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||Click on''' Add Utility'''
||Click on '''Add Utility.'''

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||'''Object Type >> Material Streams'''
||In the '''Add Utility '''window under '''Object Type''', select '''Material Streams.'''

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||'''Utility Type >> Phase Envelope'''
||Under '''Utility Type''', select '''Phase Envelope.'''

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||'''Flowsheet Object >> Feed'''
||Under '''Flowsheet Object''', select '''Feed.'''

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||Click on the '''Add Utility''' button.
||Then at the bottom, click on the '''Add Utility''' button.

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||Point to '''Phase Envelope''' window.
||'''Phase Envelope''' window opens.

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||Drag the phase envelope window.
||Let us adjust the '''Phase Envelope''' window for better visibility.

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||'''Name >> BubblePoint-DewPoint'''
||Enter '''Name''' as '''BubblePoint-DewPoint.'''

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|| '''Settings >> Bubble Points'''
|| Under '''Settings''', Click on '''Bubble Points''' tab.

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|| Point to '''Custom Initialization'''
|| Select the check box against '''Custom Initialization.'''

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|| '''Initial Flash >> PVF'''
|| We are going to calculate '''bubble point temperature''' against given pressure.

So, let '''Initial Flash''' method be '''PVF.'''

Here, we will change only '''Initial Pressure''' and '''Pressure Step.'''

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|| '''Initial Pressure >> 1 bar'''
|| Type '''Initial Pressure''' as '''1 bar''' and press '''Enter.'''

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|| '''Pressure Step >> 1 bar'''
|| Type '''Pressure Step''' as '''1 bar''' and press '''Enter.'''

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|| 
|| We will not change any '''temperature value''' as we are doing a '''PVF Flash'''.

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|| '''Settings >> Dew Points'''
|| Now, go to '''Dew Points''' tab.

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|| 
|| We will repeat the same process as '''Bubble Points Initialization.'''

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|| Point to '''Custom Initialization'''
|| Select the check box against '''Custom Initialization.'''

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|| '''Initial Flash >> PVF'''
|| We are going to calculate '''dew point temperature''' against given pressure.

So, here also, let '''Initial Flash''' method be '''PVF.'''

Hence we will change only '''Initial Pressure''' and '''Pressure Step'''

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|| '''Initial Pressure >> 1 bar'''
|| Type '''Initial Pressure''' as '''1 bar''' and press '''Enter.'''

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|| '''Pressure Step >> 1 bar'''
|| Type '''Pressure Step''' as '''1 bar''' and press '''Enter.'''

|-
||Click on '''Calculate '''button at the bottom.
||Now click on the '''Calculate''' button at the bottom.

|-
||Point to the calculation process.
||The calculation process is running in the background.

|-
||Point to the''' dew points '''and''' bubble points.'''
||We can see the '''dew points''' and '''bubble points''' generated at different pressure and temperatures.

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||'''Results >> Table'''
||Under '''Results, '''click on '''Table.'''

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||Point to the '''Pb''' column>>'''2 bar''' 

Point to the pressure value.
||In the column '''Pb''', look for '''2 bar''' at which we had to calculate the '''bubble point'''.

Here is '''2 bar''' under '''Pb''' column.

|-
||Point to the '''Tb''' column

Point to bubble point temperature value 
||Look for temperature in '''Tb''' column corresponding to '''2 bar.'''

We can see the '''bubble point temperature''' to be '''minus 91.9274 degree C'''

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||Point '''10 bar'''.
||Next we have to find '''Dew point temperature''' at '''10 bar.'''

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||Point to the '''Pd''' column>> '''10 bar.'''

Point to the pressure value.
||In the column '''Pd''', look for '''10 bar''' at which we have to find the '''dew point'''.

Here is '''10 bar''' under '''Pd''' column.

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||Point to the '''Td''' column

Point to dew point temperature value 
||Look for temperature in '''Td''' column corresponding to '''10 bar.'''

We can see the '''dew point temperature''' to be '''87.396 degree C.'''

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||
||There is an alternative way by which we can verify the correctness of the above results.

|-
||
||For this, let’s get back to '''flowsheet''' window.

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||Click on '''Feed.'''
||Click on '''Feed'''.

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||'''Flash Spec''' >> '''Pressure and Vapor Fraction (PVF)'''
||Under '''Input data''', select '''Flash Spec''' as '''Pressure and Vapor Fraction (PVF)'''

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||'''Pressure''' >> '''2 bar'''
||Type '''Vapor Phase Mole Fraction '''as '''0''' and press Enter.

|-
||'''Vapor Phase Mole Fraction''' >> '''0'''
||And '''Pressure''' as 2''' bar''' and press '''Enter'''.

|-
||Point to the temperature value.

Point to the bubble point temperature.
||Now check the temperature which is '''minus 91.9274 degree C.'''

This is the '''bubble point temperature''' at '''2 bar''' pressure.

It matches the value obtained earlier from '''Phase envelope'''.

|-
||
||Similarly, let’s check for '''Dew point temperature'''.

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||'''Flash Spec''' >> '''Pressure and Vapor Fraction (PVF)'''
||Let the '''Flash Spec''' be same as''' Pressure and Vapor Fraction (PVF)'''

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||'''Pressure''' >> '''10 bar'''
||Type '''Vapor Phase Mole Fraction '''as '''1 ''' and press '''Enter'''.

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||'''Vapor Phase Mole Fraction''' >> '''1'''
||And '''Pressure''' as '''10 bar''' and press '''Enter'''.

|-
||Point to the temperature value

Point to the bubble point temperature. 

||Now check the temperature which is '''87.396 degree C.'''

This is the '''dew point temperature''' at '''10 bar''' pressure.

It matches the value obtained earlier from '''Phase envelope'''.

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||
||Let's summarize.

|-
||'''Slide Number 7'''


'''Summary'''
||In this tutorial, we have learnt to generate:


* '''Bubble Point Temperature''' at a given pressure

* '''Dew Point Temperature '''at a given pressure

|-
||'''Slide Number 8'''


'''Assignment'''


'''Feed Conditions'''


Mole Fraction(Propane): 0.05

Mole Fraction(N-butane): 0.25

Mole Fraction(N-pentane): 0.4

Mole Fraction(N-hexane): 0.3

Temperature: 25 degree C 

Pressure: 5 bar



Property Package: Soave-Redlich-Kwong (SRK)
||As an assignment, 



Calculate the following for the given '''component system''' and '''inlet conditions''':



a) Calculate '''Bubble Point Pressure''' at '''20 degree C'''

b) Calculate '''Dew Point Pressure''' at '''60 degree C'''

|-
||'''Slide Number 9'''

'''About the Spoken Tutorial Project'''
||Watch the video available at following link.

'''http://spoken-tutorial.org/ '''

It summarizes the Spoken Tutorial project.

|-
||'''Slide Number 10'''

'''Spoken Tutorial Workshops'''
||The Spoken Tutorial Project Team

* Conducts workshops and

* Gives certificates

* For more details, please write to us.
|-
||'''Slide Number 11'''


'''Forum Slide'''

Do you have questions in this '''Spoken Tutorial?'''

Please visit this site 

Choose the minute and second where you have the question. 

Explain your question briefly. 

Someone from the FOSSEE team will answer them. 
||Please post your times queries in this forum. 

|-
||'''Slide Number 12'''

'''DWSIM Flowsheeting Project'''
||The '''FOSSEE '''team coordinates conversion of existing flow sheets into '''DWSIM'''.

We give honorarium and certificates.

For more details, please visit this site.

|-
||'''Slide Number 13'''

'''TextBook Companion Project'''
||The '''FOSSEE '''team coordinates coding of solved examples of popular books.

We give honorarium and certificates.

For more details, please visit this site.

|-
||'''Slide Number 14'''

'''Lab Migration Project'''
||The '''FOSSEE '''team helps migrate commercial simulator labs to '''DWSIM.'''

We give honorarium and certificates.

For more details, please visit this site

|-
||'''Slide Number 15'''

'''Acknowledgements'''
||'''Spoken Tutorial '''and '''FOSSEE '''projects are funded by '''NMEICT, MHRD''', Government of India.

|-
||'''Slide Number 16'''

'''Thanks'''
||This tutorial is contributed by Kaushik Datta and Priyam Nayak.


Thanks for joining.
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