Madhurig at 10:37, 21 August 2025

2025-08-21T10:37:50Z

Madhurig: Created page with "'''Title: Binary Phase Envelope''' '''Author''': Priyam Nayak '''Keywords: '''DWSIM''', '''Material stream, simulation, compounds, thermodynamic package, unit systems, bubbl..."

2025-08-21T10:28:39Z

Created page with "'''Title: Binary Phase Envelope''' '''Author''': Priyam Nayak '''Keywords: '''DWSIM''', '''Material stream, simulation, compounds, thermodynamic package, unit systems, bubbl..."

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'''Title: Binary Phase Envelope'''

'''Author''': Priyam Nayak

'''Keywords: '''DWSIM''', '''Material stream, simulation, compounds, thermodynamic package, unit systems, bubble point curve, dew point curve, Pxy, Txy, equilibrium curve, video tutorial.

{| style=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 a given '''pressure'''
* '''xy''' plot for the obtained '''Txy''' data
* '''Pxy''' plot at a given '''temperature'''
* '''xy''' plot for the obtained '''Pxy''' data
|-
|| '''Slide Number 3'''

'''System Requirements'''
|| This tutorial is recorded using
* '''DWSIM version 8.8.0'''
* '''Windows 11 OS'''
But, this process is identical in '''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''' '''stream'''
|-
|| '''Slide Number 5'''

'''Problem Statement - I'''
|| Using '''DWSIM''', we will generate:
* '''Txy''' plot at a constant pressure of '''1.5 bar'''
* '''xy''' plot for the obtained '''Txy''' data
* '''Pxy''' plot at a constant temperature of '''30<sup>0 </sup>C'''
* '''xy''' plot for the obtained '''Pxy''' data
|-
|| '''Slide Number 6'''

'''Problem Statement - II'''
|| The component system to be used is '''Ethanol-Water'''.
The envelopes are to be generated using the '''NRTL '''property package.
|-
|| '''Desktop''' >> '''DWSIM'''
|| To open '''DWSIM''', go to the''' Desktop''' and double-click on the '''DWSIM''' icon.
|-
|| '''DWSIM''' window opens.''' '''
|| '''DWSIM''' window opens.
|-
|| '''File''' >> '''New Chemical Process Model'''
|| Click on '''File '''on the menu bar.

Select '''New Chemical Process Model.'''
|-
|| Point to '''Simulation Configuration Wizard window'''

''' '''Click the '''Next button.'''
|| A '''Simulation Configuration Wizard''' window appears.

Click the '''Next '''button on the lower right corner of the window.
|-
|| Point to '''Compounds''' tab

Type '''Ethanol '''in the search bar.

Check the check box under the '''Added '''column.

'''Point to Added Compounds'''
|| We are now in the '''Compounds''' tab.

We will add the compounds present in the flowsheet.

Type '''Ethanol''' in the search bar located at the bottom of the '''Compounds''' tab.

Under the '''Added''' column, check the checkbox for '''Ethanol'''.

'''Ethanol''' is added to the simulation as displayed against the '''Added Compounds'''.
|-
|| Type '''Water '''in the search tab
|| Similarly, add '''Water '''from Chemsep database.
|-
|| Point to '''Added Compounds'''.
|| All the compounds required for this simulation are added.
|-
|| Click on the '''Next '''button at the bottom.
|| Click on the '''Next '''button at the bottom to continue.
|-
|| Point to '''Property Packages'''

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

Scroll down to find '''NRTL.'''

Click on '''Add.'''
|| Now comes '''Property Packages.'''

From the '''Available Property Packages''', select '''NRTL.'''

Then click on '''Add.'''

'''NRTL '''has been added under '''Added Property Packages.'''
|-
|| Click on the '''Next '''button at the bottom.
|| Click on the '''Next '''button at the bottom to continue.
|-
|| '''System of Units''' >> '''C5'''
|| Next option is the '''System of Units.'''

We will''' '''select '''C5''' from the drop-down.

This unit has the desired system of units according to our problem statement.
|-
|| Click on the '''Next '''button at the bottom.
|| Click on the '''Next '''button at the bottom to continue.
|-
|| '''Behavior''' >> '''Next'''
|| We will not change anything here.

Click on the '''Next''' button at the bottom.
|-
|| '''Undo/Redo Operation''' >> '''Finish'''
|| We will not change anything here.

Click on the '''Finish''' button at the bottom.

This completes configuring the simulation.
|-
|| Click and drag '''Material Stream''' to flowsheet
|| Go to the '''Streams '''tab.

Drag and drop a '''Material Stream''' from the displayed list to the '''Flowsheet area'''.
|-
|| Cursor at the stream.
|| Let us arrange the '''Stream'''.
|-
|| Clicking on the '''Stream, Property Editor Window '''opens.

Hover the mouse over the '''Property Editor Window'''
|| On clicking the '''Stream, '''the '''Property Editor Window '''opens.

We can see the '''Property Editor Window''' on the left-hand side of the '''Flowsheet'''.
|-
|| Type '''Object''' as '''Feed.'''
|| Let us rename the '''material stream''' first.

Under '''General Info, '''type the '''Object''' as '''Feed''' and Press''' Enter.'''
|-
|| Point to '''Input Data'''
|| To generate a binary phase envelope, let’s not modify any properties under '''Input Data'''.
|-
|| Click '''Solve.'''
|| However, let us run the material stream '''Feed''' with default data.

To do this, click on '''Solve'''.
|-
|| Click on '''Utilities'''
|| Now we will generate the '''Binary Phase Envelope''' for the added 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.'''
|-
|| '''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
|| '''Binary Phase Envelope''' window opens.
|-
|| Drag the phase envelope window.
|| Let us adjust the phase envelope window for better visibility.
|-
|| '''Name >> Txy-plot'''
|| Enter the '''Name''' as '''Txy-plot.'''
|-
|| Point to '''Diagram Settings.'''
|| Go to '''Diagram Settings.'''
|-
|| Compound 1 >> Ethanol
|| Select '''Ethanol''' as '''Compound 1''', if not selected.
|-
|| Compound 2 >> Water
|| Let us select Water as '''Compound 2'''.
|-
|| '''Envelope type >> Txy'''
|| Select '''Envelope type''' as '''Txy''', if not selected by default.
|-
|| '''Txy Diagram Options >> VLE'''
|| Select '''Txy Diagram Options''' as '''VLE''', if not selected by default.
|-
|| X-Axis Basis >> Mole Fraction
|| Select '''X-Axis Basis''' as '''Mole Fraction''', if not selected.
|-
|| Pressure >> 1.5 bar
|| Enter '''Pressure''' value as '''1.5 bar.'''
|-
|| Point to the temperature field.
|| Here, we are going to plot a '''Txy''' diagram.

So let us not worry about the '''temperature''' value.
|-
|| Point to '''NRTL'''
|| Make sure that the '''property package''' is selected as '''NRTL'''
|-
|| Click on the '''Calculate '''button at the bottom.
|| Now click on the '''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 the '''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 '''90.2541 deg C.'''
|-
|| Point to the subcooled region.
|| For any mixture composition below this line is a '''subcooled liquid'''.
|-
|| Point to '''Dew Point''' '''Curve'''
|| The upper line of the envelope represents the '''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 '''94.9215 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 the '''Table''' tab under the '''Results''' section.

Here, we can see the corresponding '''mole fractions''' and '''temperature '''values.
|-
||
|| Let us now generate the '''xy''' plot for data obtained in the above '''Txy''' diagram.
|-
|| '''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 for T'''
|| Enter the '''Name''' as '''xy-plot for T.'''
|-
|| 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 selected.
|-
|| '''Pressure >> 1.5 bar'''
|| Enter the '''Pressure''' value as '''1.5 bar.'''
|-
|| Click on '''Calculate '''button at the bottom.
|| Now click the '''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 the vapour phase.
|-
|| Point to '''Equilibrium Curve'''
|| The upper curve is the '''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 0.6962.
|-
||
|| 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 selected.
|-
|| '''Temperature >> 30 degree C'''
|| Enter '''Temperature''' as '''30 degC.'''
|-
||
|| Here I am going to plot a '''Pxy '''diagram.

So let us not worry about the '''pressure''' value.
|-
|| '''Property Package >> NRTL'''
|| Make sure that the property package is selected as '''NRTL'''
|-
|| Click on Calculate button at the bottom.
|| Now click on the '''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 '''0.0678 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 0.3.

We can see the '''bubble point pressure''' to be '''0.0938 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'''
|| We can see the bubble points and dew points at every composition.

For this, go to the '''Table''' tab under the '''Results''' section.

Here, we can see the corresponding '''mole fractions''' and '''pressure '''values.
|-
||
|| Let us now generate the '''xy''' plot for data obtained in the above '''Pxy''' diagram.
|-
|| '''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 for P'''
|| Enter the '''Name''' as '''xy-plot for P.'''
|-
|| Go to '''Diagram Settings.'''
|| Go to '''Diagram Settings.'''
|-
||
|| Let the compound settings be the default settings.
|-
|| '''Envelope type >> (P)xy'''
|| Select '''Envelope type''' as '''(P)xy.'''
|-
|| X-Axis Basis >> Mole Fraction
|| Select '''X-Axis Basis''' as '''Mole Fraction''', if not already selected.
|-
|| '''Temperature >> 30 degree C'''
|| Enter '''Temperature '''value as '''30 degC.'''
|-
|| Click on '''Calculate '''button at the bottom.
|| Now click the '''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 the '''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 0.5.

We can see the vapour phase '''mole fraction''' of '''Ethanol''' to be '''0.6654.'''
|-

|| '''Slide Number 7'''

'''Summary'''

In this tutorial, we have learnt to generate:

* '''Txy''' plot at a given '''pressure'''
* '''xy''' plot for the obtained '''Txy''' data
* '''Pxy''' plot at a given '''temperature'''
* '''xy''' plot for the obtained '''Pxy''' data
|| This brings us to the end of this tutorial.

Let's summarize.
|-
|| '''Slide Number 8'''

'''Assignment I'''

* '''Txy''' plot at a constant pressure of '''10132.5 Pa'''
* '''xy''' plot for the obtained '''Txy''' data
* '''Pxy''' plot at a constant temperature of '''310 K'''
* '''xy''' plot for the obtained '''Pxy''' data
|| As an assignment, generate the following.
|-
|| '''Slide Number 9'''

'''Assignment II'''
|| The component system to be used is '''Ethanol-Toluene'''.

The envelopes are to be generated using '''UNIQUAC''' property package.
|-
|| '''Slide Number 10'''

'''DWSIM Flowsheeting Project'''

The '''FOSSEE''' team coordinates the conversion of existing '''flowsheets''' into '''DWSIM'''.

We give honorarium and certificates for those who do this.

For more details, please visit this site.
|| We invite you to participate in '''DWSIM Flowsheeting Project'''.
|-
|| '''Slide Number 11'''

'''Lab Migration Project'''

The '''FOSSEE''' team helps migrate commercial '''simulator labs''' to '''DWSIM.'''

We give honorarium and certificates for those who do this.

For more details, please visit this site
|| We help you to migrate commercial '''simulator labs''' to '''DWSIM.'''
|-
|| '''Slide Number 12'''

'''Acknowledgements'''
|| The '''FOSSEE''' project is funded by '''NMEICT, Ministry of Education(MoE)''', Government of India.
|-
|| '''Slide Number 13'''

'''Thank You'''
|| We thank the '''DWSIM''' team for making it as an''' open source software.'''

Thank you for joining.
|-
|}

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 || '''Visual Cue'''

Process-Simulation-using-DWSIM/C2/Binary-Phase-Envelope/English - Revision history

Madhurig at 10:37, 21 August 2025

Madhurig: Created page with "'''Title: Binary Phase Envelope''' '''Author''': Priyam Nayak '''Keywords: '''DWSIM''', '''Material stream, simulation, compounds, thermodynamic package, unit systems, bubbl..."