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7/30/2019 7.Two Stage Compression
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Two Stage Compression
Engr. Syed Zaheer Abbas
Chemical Engineering Department
University of Engineering & Technology
Lahore
mailto:[email protected]7/30/2019 7.Two Stage Compression
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Process Description
2Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
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Learning Objectives
3Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
After you have completed this section youwill be able to:
Use Compressors in Aspen HYSYSUse Recycle Operation in Aspen HYSYS
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Building the Simulation
4Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Basis environment enables you to specify thebasic information like components, property
package, reactions and so forth associated to
the simulation.
Case environment enables you to specify the
streams and operation equipment associated
to the simulation, and view the calculated
results from the simulation.
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1) Component List
5Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Nitrogen i-Butane
CO2 n-Butane
Methane i-Pentane
Ethane n-Pentane
Propane n-Hexane
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2) Defining a Fluid Package
6Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
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Entering the Simulation
Environment
7Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
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Installing Feed Streams
8Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Add a Material Stream
Name To Compression
Temperature (C) 35
Pressure (kPa) 1725
Molar Flow (kgmole/h) 5000
Component Mole Fraction Component Mole Fraction
Nitrogen 0.0075 i-Butane 0.0652
CO2 0.0147 n-Butane 0.0578
Methane 0.5069 i-Pentane 0.0515
Ethane 0.1451 n-Pentane 0.0431
Propane 0.0725 n-Hexane 0.0357
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Building the Simulation without
the Recycle Operation
9Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
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1. Installing a Mixer
10Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Mixer 1
Inlet To Compression
Outlet To LP Sep
Parameters
Pressure Assignment Equalize all
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2. Installing a Separator
11Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name LP Sep
Inlet To LP Sep
Vapor Outlet LP Sep Vap
Liquid Outlet LP Sep Liq
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3. Installing a Compressor
Process Modeling by12Engr. S. Zaheer Abbas
Connections
Name Stage 1
Inlet LP Sep Vap
Outlet Stage 1 Out
Energy Stage 1 HP
Parameters
Adiabatic Efficiency 75% (Default)
Worksheet
Stage 1 Out, Pressure 3450 kPa
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4. Installing a Cooler
13Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Stage 1 Cooler
Inlet Stage 1 Out
Outlet Cooler 1 Out
Energy Stage 1 Q
Parameters
Pressure Drop 0 kPa
Worksheet
Cooler 1 Out, Temperature 50C
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5. Installing 2nd Mixer
14Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Mixer 2
Inlet Cooler 1 Out
Outlet To IS Sep
Parameters
Pressure Assignment Equalize all
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6. Installing Separator
15Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name IS Sep
Inlet To IS Sep
Vapor Outlet IS Sep Vap
Liquid Outlet IS Sep Liq
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7. Installing a Valve
16Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Let Down 1
Inlet IS Sep Liq
Outlet LD1 Out
Worksheet
LD1 Out, Pressure 1725 kPa
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8. Installing 2nd Compressor
17Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Stage 2
Inlet IS Sep Vap
Outlet Stage 2 Out
Energy Stage 2 HP
Parameters
Adiabatic Efficiency 75% (Default)
Worksheet
Stage 2 Out, Pressure 6900 kPa
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9. Installing 2nd Cooler
18Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Stage 2 Cooler
Inlet Stage 2 Out
Outlet Cooler 2 Out
Energy Stage 2 Q
Parameters
Pressure Drop 0 kPa
Worksheet
Cooler 2 Out, Temperature 50C
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19Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
10. Installing HP Separator
Connections
Name HP Sep
Inlet Cooler 2 Out
Vapor Outlet HP Sep Vap
Liquid Outlet HP Sep Liq
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11. Installing 2nd Valve
20Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
Connections
Name Let Down 2
Inlet HP Sep Liq
Outlet LD2 Out
Worksheet
LD2 Out, Pressure 3450 kPa
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21Process Modeling by using Aspen HYSYS
Engr. S. Zaheer Abbas
12. Installing the Recycles
RCY-1:
Inlet: LD1 Out
Outlet: RCY 1 Out
RCY-2:
Inlet: LD2 Out
Outlet: RCY 2 Out
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EXERCISE