View source for DWSIM/C2/Binary-Phase-Envelope/English

{|border=1
||'''Visual Cue'''
||'''Narration'''
|- 
|| '''Slide Number 1
'''Title Slide''' 
|| Welcome to this spoken tutorial on '''Binary Phase Envelope '''in '''DWSIM'''. 

|- 
|| '''Slide Number 2'''

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

* '''Txy''' plot at given '''pressure''' 

* '''xy''' plot for the obtained '''Txy''' data 

* '''Pxy''' plot at given '''temperature''' 
|- 
|| '''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

* add '''material '''streams and specify their properties. 
 
|- 
|| '''Slide Number 5''' 


'''Prerequisite Tutorials and Files''' 

'''www.spoken-tutorial.org''' 
|| The pre-requisite 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''' 


Mass Flow: 120 kmol/h 

Mole Fraction(Ethanol): 0.5 

Mole Fraction(1-propanol): 0.5 

Temperature: 30 degree C 

Pressure: 3.5 bar 

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



1) '''Txy''' plot at a constant pressure of '''1.013 bar''' 

2) '''xy''' plot for the obtained '''Txy''' data 

3) '''Pxy''' plot at a constant temperature of '''75<sup>0</sup>C''' 



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

|- 
|| 
|| 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. 

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

|- 
|| '''ChemSep '''database >>'''Ethanol''' 
|| Select '''Ethanol '''from '''ChemSep '''database. 

|- 
|| '''Type 1-propanol '''in the '''Search '''tab 
|| Similarly, add '''1-propanol'''. 

|- 
|| Click on '''Next.''' 
|| At the bottom, 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 Packages '''list, double-click on '''Soave-Redlich-Kwong (SRK).''' 

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

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|| 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)''' 

|- 
|| Click '''Next''' 
|| at the bottom, click on the '''Next '''button'''.''' 

|- 
|| Point to '''System of Units''' 
|| 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''' 
|| At the bottom, click on '''Finish '''button'''.''' 

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

|- 
|| 
|| Let’s insert a material stream for which we have to generate the '''Txy, xy '''and '''Pxy''' plots. 

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

|- 
|| In the '''Filter List '''tab(right panel), 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.''' 

|- 
|| Point to '''Feed stream '''properties. 
|| Now we will specify the '''Feed stream '''properties. 

|- 
|| Go to '''Input Data.''' 

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

|- 
|| '''Input Data >>Temperature >>30 C''' 

Press '''Enter''' 
|| Change '''Temperature '''to '''30 deg C '''and press '''Enter.''' 

|- 
|| '''Input Data >>Pressure >>3.5 bar''' 

Press '''Enter''' 
|| Change '''Pressure '''to '''3.5 bar '''and press '''Enter'''. 

|- 
|| '''Input Data >>Molar Flow >>120 kmol/h''' 

Press '''Enter''' 
|| Change '''Molar Flow '''to '''120 kmol/h '''and press '''Enter'''. 

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

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


By default, '''Mole Fractions '''will be selected as '''Basis.''' 

|- 
|| '''Ethanol: 0.5''' 



|| For '''Ethanol''', enter the '''Amount '''as '''0.5 '''and press '''Enter'''. 

|- 
|| '''1-propanol: 0.5''' 
|| Similarly, for '''1-propanol''', enter it as '''0.5 '''and press '''Enter'''. 

|- 
|| Point to the green tick mark. 

Click '''Accept Changes''' 
|| On the right side, 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'''. 
 
|- 
|| Click on''' Add Utility''' 
|| Click on '''Add Utility.''' 

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

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

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

|- 
|| Click on '''Add Utility''' 
|| At the bottom, click on the '''Add Utility''' button.

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

|- 
|| Drag the phase envelope window. 
|| Let us adjust the phase envelope window for better visibility. 

|- 
|| '''Name >> Txy-plot''' 
|| Enter '''Name''' as '''Txy-plot.''' 

|- 
|| Point to '''Diagram Settings.''' 
|| Go to '''Diagram Settings.''' 

|- 
|| Compound 1 >> Ethanol 
|| Select '''Ethanol''' as '''Compound 1''', if not already selected. 


By default, '''Ethanol''' is selected as '''Compound 1'''. 

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|| Compound 2 >> 1-propanol 
|| Make sure that the other compound is selected as '''Compound 2'''. 


In this case, it is '''1-propanol''' which is '''Compound 2'''. 

|- 
|| '''Envelope type >> Txy''' 
|| Select '''Envelope type''' as '''Txy''', if not already selected. 


By default, '''Txy''' is selected as '''Envelope type'''. 

|- 
|| '''Txy Diagram Options >> VLE''' 
|| Select '''Txy Diagram Options''' as '''VLE''', if not already selected. 


By default, '''VLE''' is selected as '''Txy Diagram Options'''. 

|- 
|| X-Axis Basis >> Mole Fraction 
|| Select '''X-Axis Basis''' as '''Mole Fraction''', if not already selected. 


By default, '''Mole Fraction''' is selected as '''X-Axis Basis''' 

|- 
|| Pressure >> 1.013 bar 
|| Enter '''Pressure''' as '''1.013 bar.''' 

|- 
|| 
|| Here we are going to plot a '''Txy''' diagram. 


So let us not worry about the '''pressure''' value. 

|- 
|| Point to '''Soave-Redlich-Kwong (SRK)''' 
|| Make sure that the '''property package''' is selected as '''Soave-Redlich-Kwong (SRK)''' 

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

|- 
|| Point to '''Txy''' diagram 


Point to '''X-axis''' 


Point to '''Y-axis''' 
|| The diagram generated is a '''Txy''' diagram or '''Constant Pressure Phase Diagram'''. 


'''X-axis''' indicates the mole fraction of Ethanol. 

 
'''Y -axis''' indicates the temperature range for which the '''VLE '''is generated. 

|- 
|| Point to '''Bubble Point''' '''Curve''' 
|| The lower line of the envelope represents '''Bubble Point''' '''Curve.''' 

|- 
|| Point to lower line Ethanol mole fraction value 


Point to bubble point temperature value 
|| Hover the mouse to the lower line at Ethanol mole fraction of '''0.5.''' 


We can see the bubble point temperature to be '''86.2853 deg C.''' 

|- 
|| Point to the subcooled region. 
|| For any mixture composition below this line, is '''subcooled liquid'''. 

|- 
|| Point to '''Dew Point''' '''Curve''' 
|| The upper line of the envelope represents '''Dew Point Curve.''' 

|- 
|| Point to upper line Ethanol mole fraction value 


Point to dew point temperature value 
|| Hover the mouse to the upper line at Ethanol mole fraction of '''0.5.''' 


We can see the dew point temperature to be '''89.5881 deg C''' 

|- 
|| Point to the '''superheated vapour '''region. 
|| For any mixture composition above this line, the mixture is '''superheated vapour'''. 

|- 
|| Point to '''VLE region''' 



|| The area enclosed between these two lines is the '''VLE region.''' 


Here both vapor and liquid phases exist in '''equilibrium'''. 

|- 
|| Point to '''Results''' section >> click on''' Table''' 

 
point to the values. 
|| We can see the bubble points and dew points at every composition. 


For this, go to '''Results''' section and click on '''Table'''. 


Here we can see the corresponding '''mole fractions''' and '''temperatures '''values. 

|- 
|| 
|| Let us now generate the '''xy''' plot for data obtained in the above '''Txy''' diagram. 

|- 
|| Close this window
|| Close this window. 

|- 
|| '''Utilities >> Add Utility''' 
|| Go to '''Utilities''' and click on '''Add Utility.''' 

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

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

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

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

|- 
|| Point to '''Binary Phase Envelope '''window 
|| Once again, '''Binary Phase Envelope''' window opens. 

|- 
|| 
|| Let us adjust the window for better visibility. 

|- 
|| '''Name >> xy-plot''' 
|| Enter '''Name''' as '''xy-plot.''' 

|- 
|| Go to '''Diagram Settings.''' 
|| Go to '''Diagram Settings.''' 

|- 
|| 
|| Let the compound settings be the default settings. 

|- 
|| '''Envelope type >> (T)xy''' 
|| Select '''Envelope type''' as '''(T)xy.''' 

|- 
|| X-Axis Basis >> Mole Fraction 
|| Select '''X-Axis Basis''' as '''Mole Fraction''', if not already selected. 


By default, '''Mole Fraction''' is selected as '''X-Axis Basis.''' 

|- 
|| '''Pressure >> 1.013 bar''' 
|| Enter '''Pressure''' as '''1.013 bar.''' 

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

|- 
|| Point to '''xy''' diagram 


Point to '''X-axis''' 


Point to '''Y-axis''' 
|| The diagram generated is called '''xy diagram.''' 


'''X-axis''' indicates the mole fraction of '''Ethanol''' in liquid phase. 


'''Y -axis''' indicates the mole fraction of '''Ethanol''' in vapour phase. 

|- 
|| Point to '''Equilibrium Curve''' 
|| The upper curve is called '''Equilibrium Curve.''' 

|- 
|| Point to upper line Ethanol mole fraction value 


Point to vapour phase mole fraction of ethanol value 
|| Hover the mouse to the upper line at '''Ethanol mole fraction '''of '''0.6.''' 


We can see the vapour phase '''mole fraction''' of '''Ethanol''' to be '''0.7539.''' 

|- 
|| 
|| Let us generate the '''Pxy''' plot now. 

|- 
|| '''Utilities >> Add Utility''' 
|| Go to '''Utilities''' and click on '''Add Utility.''' 

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

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

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

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

|- 
|| Point to the window. 
|| Once again, '''Binary Phase Envelope''' window opens. 

|- 
|| Drag the window to adjust. 
|| Let us adjust the window for better visibility. 

|- 
|| '''Name >> Pxy-plot''' 
|| Enter '''Name''' as '''Pxy-plot.''' 

|- 
|| Go to '''Diagram Settings''' 
|| Go to '''Diagram Settings.''' 

|- 
|| 
|| Let the compound settings be the default settings. 

|- 
|| '''Envelope type >> Pxy''' 
|| Select '''Envelope type''' as '''Pxy.''' 

|- 
|| X-Axis Basis >> Mole Fraction 
|| Select '''X-Axis Basis''' as '''Mole Fraction''', if not already selected. 


By default, '''Mole Fraction''' is selected as '''X-Axis Basis.''' 

|- 
|| '''Temperature >> 75 degree C''' 
|| Enter '''Temperature''' as '''75 degC.''' 

|- 
|| 
|| Here are going to plot a '''Pxy '''diagram. 


So let us not worry about the '''temperature''' value. 

|- 
|| '''Property Package >> Soave-Redlich-Kwong (SRK) ''' 
|| Make sure that the property package is selected as '''Soave-Redlich-Kwong (SRK)''' 

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

|- 
|| Point to '''Pxy''' diagram 


Point to '''X-axis''' 


Point to '''Y-axis''' 
|| The diagram generated is a '''Pxy''' diagram or '''Constant Temperature Phase Diagram'''. 


'''X-axis''' indicates the mole fraction of Ethanol. 


'''Y -axis''' indicates the Pressure range for which the '''VLE''' is generated. 

|- 
|| Point to '''Dew Points''' 
|| The lower line of the envelope represents '''Dew Points'''. 

|- 
|| Point to lower line Ethanol mole fraction value 


Point to dew point temperature value 
|| Hover the mouse to the lower line at '''Ethanol mole fraction '''of '''0.4.''' 


We can see the '''dew point pressure''' to be '''0.523 bar.''' 

|- 
|| Point to the line. 
|| For any mixture composition below this line, is completely '''vapour.''' 

|- 
|| Point to '''Bubble Points''' 
|| The upper line of the envelope represents '''Bubble Points'''. 

|- 
|| Point to upper line Ethanol mole fraction value 


Point to bubble point temperature value 
|| Hover the mouse to the upper line at '''Ethanol mole fraction '''of 0.8. 


We can see the '''bubble point pressure''' to be '''0.782 bar.''' 

|- 
|| Point to the line. 
|| For any mixture composition above this line, is completely '''liquid.''' 

|- 
|| Point to '''VLE region''' 
|| The area enclosed between these two lines is the '''VLE region'''. 


Here both vapor and liquid phases exist in '''equilibrium'''. 

|- 
|| Point to '''Results''' section 


Click on''' Table''' 

 

|| Now, go to '''Results''' section. 


Click on '''Table'''. 


Here we can see the corresponding '''mole fractions''' and '''pressures'''. 

|- 
|| 
|| Let's summarize. 

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


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


* '''Txy''' plot at given '''pressure''' 
* '''xy''' plot for the '''Txy''' data obtained above 
* '''Pxy''' plot at given '''temperature''' 
|- 
|| '''Slide Number 8''' 


'''Assignment ''' 
|| Generate '''P(xy)''' plot for the '''Pxy''' data obtained. 


Generate the '''P(xy)''' plot using '''NRTL '''model. 


Compare the results. 

|- 
|| '''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 contact@spoken-tutorial.org 

|- 
|| '''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 13TextBook 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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