chapter 7 Compressor and Turbine

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chapter 7 Compressor and Turbine
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7-1 Classification of Compressor
compressor
Positive displacement
Turbine
reciprocating
rotary
centrifugal
axial flow
This is the type we will study
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7-2 Compressor Work
7-2-1 The cycle of compressor
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7-2-2 Compressor Work
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p
Isothermal
Polytropic
Isentropic
v
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7-3 Real compressor
7-3-1 Clearance volume
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7-3-2 The effect of Clearance volume
p
v
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7-4 Multistage Compression with Intercooling
p
p2
B
pm
A
p1
v
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Since p1v1pmvm
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To get the minimum work
Then
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7-5 Steam Turbine
7-5-1 Steam Turbine
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7-5-2 h-s Diagram

1. constant pressure curves

(2) Isothermal curves
(3) constant specific volume curves
(4) constant dryness fraction curves
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7-6 Adiabatic Efficiency of Steady-Flow Devices
7-6-1 Compressor If an adiabatic
compressor
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Draw the process on a h-s diagram
But if the process is an irreversible process, it
will be
Therefore we define the inner efficiency of
compressor as following
This equation can also be used for pump
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7-6-2 Turbine If an adiabatic turbine
If irreversible
Therefore we define the inner efficiency of
turbine as following
This equation can also be used for nozzle
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The end of this chapter