Process Simulation using DWSIM

Process Simulation using DWSIM

P. R. NarenSchool of Chemical & Biotechnology

SASTRA University

E-mail: [email protected]

National Conference on Advances in Process Engineering CAPE-2015

SASTRA UniversityThanjavur, Tamilnadu 613 401 INDIA

10th October 2015

Progress Through Quality Education

mailto:[email protected]


Outline

• Process Simulation and Simulation Tools

• DWSIM

• Spoken Tutorials – IITB

• Tutorials on process simulation using DWSIM

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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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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 MedeirosProcess Engineer, Petrobras


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 MoudgalyaChemical Engg., IITB

http://spoken-tutorial.org/




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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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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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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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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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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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

FeedMolar flow rateMol fractionState

100 kmol/hrxF = 0.4Saturated Liquid at P = 1 bar

Reflux 2

Product Bottoms: xB = 0.05Distillate: xD = 0.95


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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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 gCO H O CO H


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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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 10-Oct-15 15


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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