Process-Simulation-using-DWSIM/C2/Bubble-Points-and-Dew-Points-Calculation/English

Title: Calculation of Bubble Points and Dew Points

Author: Priyam Nayak

Keywords: DWSIM, Material stream, simulation, compounds, thermodynamic package, unit systems, bubble point, dew point, flash specification, video tutorial.

Visual Cue	Narration
Slide Number 1 Title Slide	Welcome to this tutorial on Bubble Points and Dew Points Calculation in DWSIM.
Slide Number 2 Learning Objective	In this tutorial, we will learn to calculate: Bubble Point Temperature Dew Point Temperature Bubble Point Pressure Dew Point Pressure
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 and specify the properties of a material stream
Slide Number 5 Problem Statement - I	Let’s calculate the following using the Soave-Redlich-Kwong(SRK) property package for the given system. Bubble Point Temperature at 5 bar Dew Point Temperature at 10 bar Bubble Point Pressure at minus 15 degree C Dew Point Pressure at 60 degree C
Slide Number 6 Problem Statement - II	Here, the component composition is given in terms of Mole fractions.
Switch to DWSIM.	I have opened the DWSIM interface.
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 Methane 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 Methane in the search bar located at the bottom of the Compounds tab. Under the Added column, check the checkbox for Methane. Methane is added to the simulation as displayed against the Added Compounds.
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.
Type N-pentane in the Search tab	Then add N-pentane.
Point to Added Compounds.	All the compounds required for this simulation are added. It can be seen in the Added Compounds.
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 Soave-Redlich-Kwong (SRK). Click on Add.	Now comes Property Packages. From the Available Property Packages, select Soave-Redlich-Kwong. Then click on Add. Soave-Redlich-Kwong 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. C5 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	Click on the Stream to open the Property Editor Window. The Property Editor Window is seen 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. Press Enter.
Click >> Compound Amounts Basis >> Mole Fractions	First, we will specify the composition of this stream. To do this, click on Compound Amounts. Choose the Basis as Mole Fractions, if not already selected.
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.
Isobutane: 0.1	And for Isobutane, type 0.1 and press Enter.
N-butane: 0.2	Next, for N-butane, type 0.2 and press Enter.
Isopentane: 0.25	For Isopentane, type 0.25 and press Enter.
N-pentane: 0.15	Lastly, for N-pentane, type 0.15 and press Enter.
Click >> Accept changes	On the right side, click on the Accept Changes button.
Click >> Stream Conditions	Now click on Stream Conditions. For now, we will not change the values of temperature and pressure. Let’s calculate the bubble point and dew point temperatures for a given pressure. We will demonstrate that shortly.
Point to Mass Flow, Molar Flow and Volumetric Flow	Coming to flow rates, we will not specify any flow rates. We will leave the default values as such. Can you guess why? Because bubble point temperature and pressure are intensive properties. Same goes with dew point temperature and pressure as well. Therefore these properties do not depend on the amount, in this case, flow rates. However, they depend on each component composition in the mixture, in this case, mole fraction.
	Now let’s calculate the bubble point & dew point temperature for a given pressure.
	First, we will calculate the Bubble Point Temperature at 5 bar pressure.
Flash Spec >> Pressure and Vapor Fraction (PVF)	Under Input data, select Flash Spec as Pressure and Vapor Fraction (PVF)
Pressure >> 5 bar	Type Pressure value as 5 bar.
Vapor Phase Mole Fraction >> 0	And Vapor Phase Mole Fraction as 0.
Point to the temperature value.	Now check the temperature. It has changed to minus 50.4783 degree C. This is the bubble point temperature at 5 bar pressure.
	Similarly, let’s find the Dew Point Temperature at 10 bar pressure.
Flash Spec >> Pressure and Vapor Fraction (PVF)	Let the Flash Spec be same as Pressure and Vapor Fraction (PVF)
Pressure >> 10 bar	Type Pressure value as 10 bar.
Vapor Phase Mole Fraction >> 1	And Vapor Phase Mole Fraction as 1.
Point to the temperature value	Now check the temperature. It has changed to 87.3958 degree C. This is the dew point temperature at 10 bar pressure.
	Let's calculate the bubble point and dew point pressure for a given temperature.
	First, we will calculate Bubble Point Pressure at minus 15 degree C.
Flash Spec >> Temperature and Vapor Fraction (TVF)	Under Input data, select Flash Spec as Temperature and Vapor Fraction (TVF)
Temperature >> -15 C	Type Temperature as minus 15 degree C.
Vapor Phase Mole Fraction >> 0	And Vapor Phase Mole Fraction as 0.
Point to the pressure value.	Now check the pressure which is 8.77988 bar. This is the bubble point pressure at minus 15 degree C temperature.
	Similarly, let’s find the Dew point Pressure at 60 degree C.
Flash Spec >> Temperature and Vapor Fraction (TVF)	Let the Flash Spec be the same as Temperature and Vapor Fraction (TVF).
Temperature >> 60 C	Type Temperature as 60 degree C.
Vapor Phase Mole Fraction >> 1	And Vapor Phase Mole Fraction as 1.
Point to the pressure value.	Now check the pressure which is 21.8297 bar. This is the bubble point pressure at 60 degree C temperature. This brings us to the end of this tutorial.
Slide Number 7 Summary In this tutorial, we have learnt to calculate: Bubble Point Temperature Dew Point Temperature Bubble Point Pressure Dew Point Pressure	Let's summarize.
Slide Number 8 Assignment I Bubble Point Pressure at 20 degree C Dew Point Pressure at 60 degree C Bubble Point Temperature at 3 bar Dew Point Temperature at 15 bar	As an assignment, Using Soave-Redlich-Kwong(SRK), calculate the following:
Slide Number 9 Assignment II	Here, the component composition is given in terms of mole fraction.
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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Madhurig