Free and Open Source Process Simulator DWSIM Basics

1. Process Simulation using DWSIM
P. R. Naren
School of Chemical & Biotechnology
SASTRA University
E-mail: prnaren@scbt.sastra.edu
National Conference on Advances in Process Engineering
CAPE-2015
SASTRA University
Thanjavur, Tamilnadu 613 401 INDIA
10th October 2015
Progress Through Quality Education

2. Outline
• Process Simulation and Simulation Tools
• DWSIM
• Spoken Tutorials – IITB
• Tutorials on process simulation using DWSIM
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3. Process Simulation
• Perform material and energy balance
• Performance of equipment for given design
• Sensitivity analysis
• What-If analysis
• Process synthesis and comparison
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4. DWSIM
• Process Simulator
• Steady State
• Thermodynamic Models
• Unit Operations
• Free & Open Source
• CAPE Open Complaint
http://dwsim.inforside.com.br/
https://en.wikipedia.org/wiki/DWSIM
http://dwsim.fossee.in/
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Daniel Medeiros
Process Engineer, Petrobras

5. FOSSEE Project
• Free and Open Source Software for Education
• FOSSEE on DWSIM: http://dwsim.fossee.in/
• Spoken Tutorials
 10 min short videos on DWSIM http://spoken-tutorial.org/
 Forum to post queries on videos
– Textbook Companion Project
 http://dwsim.fossee.in/Textbook_Companion_Project
 Code all solved examples of standard textbook
 Get paid ! Honorarium from IITB
– Lab Migration Project
 Convert process simulation lab to DWSIM
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Dr. Kannan Moudgalya
Chemical Engg., IITB

6. Tutorials
• Creation of material streams
• Creation of simple process flow sheet
• Thermodynamics
– Thermo physical properties of components
– VLE data of binary component system
• Process Units
– Mixer
– Simple heater
– Simple distillation column
– Flash column
– Equilibirum reactor
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7. Tutorial 1
Specification of Material Stream and Composition
• Objective
– Create material stream
– Specify composition
– Operating condition (Pressure, Temperature, State –
Thermodynamics)
• Spoken Tutorial
• Data
– Components: Benzene and Toluene
– Composition: Equimolar
– Thermodynamics: Raoults Law
– Pressure: 1 atm
– Temperature: 30oC
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8. Tutorial 2
Generation of Vapour Liquid Equilibrium (VLE) data
• Objective
– Generate binary component VLE (Pxy at T or Txy
at P, y vs. x)
• Data
– Components: Benzene and Toluene
– Pressure: 1 atm
Generate Txy, y vs. x
– Temperature: 50oC
Generate Pxy, y vs x
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9. Tutorial 3
Mixing of Two Liquid Streams
• Objective
– Mix two liquid streams and estimate the flow rate and composition of outlet
stream
• Data
– Inlet stream 1: 10 mol % Methanol solution at 20 kmol/hr
– Inlet stream 2: 80 mol % Methanol solution at 10 kmol/hr
– Both the streams are at 30oC and at 1 atm pressure
– The liquid streams can be considered as ideal
• Block
– Mixer
• Output
– Outlet molar flow rate
– Composition
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10. Tutorial 4
Heat duty through Simulation of Heater Block
• Objective
– Determine the heat duty required to heat a fluid to a desired temperature
• Data
– Fluid: Water
– Inlet mass flow rate: 50 kg/hr
– Inlet temperature: 25oC
– Outlet temperature: 90oC
– Pressure: 1 bar
• Block
– Heater
• Output
– Heat Duty
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11. Tutorial 5
Simulation of a Simple Distillation Column
• Objective
– Develop a simple process sheet to simulate distillation column
– Underwood Fenske Method
• Spoken Tutorial
• Output
– Minimum reflux
– Min. no. of stages
– Condenser duty
– Re-boiler duty
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Quantity Value
Components Benzene, Toluene
Thermodynamics Ideal – Raoult’s Law
Feed
Molar flow rate
Mol fraction
State
100 kmol/hr
xF = 0.4
Saturated Liquid at P = 1 bar
Reflux 2
Product Bottoms: xB = 0.05
Distillate: xD = 0.95

12. Tutorial 6
Simulation of a Simple Process Flow Sheet – Mixer and Flash
Column
• Objective
– Develop process sheet with Mixer and Flash Column
 Mix two streams
 Outlet from mixer is sent to flash column
 Estimate the vapour and liquid outlet
• Spoken Tutorial
• Output
– Vapour composition
– Liquid composition
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13. Tutorial 7
Simulation of Equilibirum Reactor
• Objective
– Simulate equilibrium reactor to estimate conversion for reversible reaction
(known stoichiometry)
• Data
– Reversible reaction – Water Gas Shift
– Operating temperature: 900 K, Operating pressure: 1 atm
– Inlet flow rate: 100 kmol/hr
– Composition: stoichiometric ratio of CO and H2O
• Block
– Equilibrium Reactor
• Output
– Equilibrium conversion in terms of base component
– Enthalpy of reaction
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       2 2g g 2 g g
CO H O CO H 

14. To Sum Up
• DWSIM – Effective and promising open source
process simulation tool
• Complement learning process through simulation of
difference process scenarios
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15. Gratitude
• Prof Kannan Moudgalya, IITB
– M. Neelesh Chandran, Chemical Engg., SASTRA
– C. S. Vighnesh, Chemical Engg., SASTRA
• CAPE-2015 and IIChE Student Chapter
– For this wonderful opportunity
– PR Team for their registration drive !!
– Technical and Infra support team
• Audience
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16. THANK YOU
A person who never made a mistake never tried
anything new
- Albert Einstein
- 1879 -1955
Entities must not be
multiplied beyond necessity
- William of Ockham
- 12th A.D.
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