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Example 51
Carbon dioxide at 500°F and 210 psia enters a well
insulated turbine. The exit pressure is 5 psia and the mass
flow rate is 22 lbm/s. If the work output is 850 hp,
calculate the turbine efficiency.
Solution:
The actual work done by an adiabatic turbine is
()
12
Wm
hh
=−
±
±
1
Btu
enthalpy(CO2,
500)
3749
lbm
hT
==
=
−
Solve for h2,
21
W
m
±
±
2
Btu
2544
h
850 hp
1 hp
Btu
Btu
3749
3776
lbm
3600 s
lbm
lbm
22
s1
h
h
⎛⎞
⎜⎟
⎝⎠
−
State 2s has the entropy of state 1 and the pressure of state
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This homework help was uploaded on 04/07/2008 for the course MANE 4010 taught by Professor Kaminski during the Spring '08 term at Rensselaer Polytechnic Institute.
 Spring '08
 Kaminski

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