intro1 to simulink

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16/9/2015

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INTRODUCTION TO

ASPEN HYSYS

Part 1

What is Process Simulation?• The purpose of simulation is to model and predict the

performance of a process (i.e. process inputs are given to

predict the process outputs).

• Aspen Hysys uses the underlying physical relationships (e.g.,

material and energy balances, thermodynamic equilibrium,

rate equations) to predict process performance (e.g., stream

properties, operating conditions, and equipment sizes).

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Selecting a Fluid Package

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Tutorial 1

Create one material stream that contains only water with the

following condition:

Fluid package: Peng Robinson

Flowrate: 100 kgmole/h

Pressure: 1 atm

Vapor/phase fraction: 1.0

1. What is the temperature of this stream?

2. Repeat the above procedure by replacing pressure with

temperature of 150oC. What is the pressure of this stream?

3. With the same condition in (2), reduce the temperature to

70oC. What is the new pressure of this stream? 6



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Tutorial 2

Create one material stream that contains only n-butane with the

following condition:

Fluid package: Soave-Redlich-Kwong (SRK)

Flowrate: 100 kgmole/h

Pressure: 18 atm

Temperature: 500 K

1. What is the molar volume of n-butane?

2. Compare the result using Peng-Robinson.

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Tutorial 3

Pumps are used to move liquids. The pump increases the

pressure of the liquid. Water at 120oC and 3 bar is fed into a

pump that has 10% efficiency. The flowrate of the water is 100

kgmole/h and its outlet pressure from the pump is 84 bar. UsePeng-Robinson as a fluid package, determine the outlet

temperature of the water. If the outlet temperature is 200oC,

what is the efficiency of the pump?

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Tutorial 4

Compressor is used to move gases. The compressor increases

the pressure of the gases. A mixture of natural gas (C1, C2, C3, i-

C4, n-C4, i-C5, n-C5, n-C6, C7+) at 100oC and 1 bar is fed into a

compressor that has 30% efficiency. The flowrate of the natural

gas is 100 kgmole/h and its outlet pressure from the compressor

is 5 bar. Use Peng-Robinson as a fluid package, determine the

outlet temperature of the natural gas.

Conponent mole fractionC1 0.333 i-C5 0.069

C2 0.143 n-C5 0.059

C3 0.101 n-C6 0.078

i-C4 0.098 C7+ 0.042

n-C4 0.08 9

Tutorial 5

The expander is used to decrease the pressure of a high pressure

inlet gas stream to produce an outlet stream with low pressure

and high velocity. A mixture of natural gas (methane, ethane and

propane) at 25oC and 20 bar is fed into an expander that has 30%efficiency. The flowrate of the natural gas is 100 kgmole/h and its

outlet pressure from the expander is 5 bar. Use Peng-Robinson

as a fluid package, determine the outlet temperature of the

natural gas.

Component mole fraction

C1 0.5

C2 0.3

C3 0.2

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Tutorial 6

Simulate a material stream containing benzene, propylene,

propane and cumene.

Use PRSV fluid package.

Determine the mass density, molar volume, molar enthalpy,

surface tension and viscosity of the stream.

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Tutorial 7

Add a heater to the simulation in Tutorial 6. Determine the heat

duty required to heat stream S1 to a saturated vapor at 162 kPa.

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intro1 to simulink