The Gas Turbine Power Plant

Example 12.1,Page 577

In [3]:
# Initialization of Variable
from math import pi
from math import atan
from numpy import *
T1=80.0 #F
T2=460.0 #F
T3=1300.0 #F
T4=780.0 #F

#calculations
#"from mollier charts"
h1=129.1 #Btu/lb
h2 = 221.2 #Btu/lb
h3= 438.8 #Btu/lb
h4 = 301.5 #Btu/lb
wcom=h2-h1
wcob=h3-h2
wtur=h3-h4
eta=(wtur-wcom)/wcob *100

#results
print " work done by compressor in btu input as work per lb of air compressed",round(wcom,3)
print " Heat supplied in the combustor in Btu supplied per lb of air ",round(wcob,3)
print " work done in the turbine in Btu output as work per lb of air",round(wtur,3)
print " Cycle efficiency in percent",round(eta,3)

 work done by compressor in btu input as work per lb of air compressed 92.1
 Heat supplied in the combustor in Btu supplied per lb of air  217.6
 work done in the turbine in Btu output as work per lb of air 137.3
 Cycle efficiency in percent 20.772

Example 12.2,Page 579

In [4]:
# Initialization of Variable
from math import pi
from math import atan
from numpy import *
T1=80 #F
T2=460 #F
T=700 #F
T3=1300 #F
T4=780 #F
#"from mollier charts"
h1=129.1 #Btu/lb
h2 = 221.2 #Btu/lb
h3= 438.8 #Btu/lb
h4 = 301.5 #Btu/lb
h=281.1 #Btu/lb

#calculations
wcom=h2-h1
wcob=h3-h2
wtur=h3-h4
output=-wcom+wtur
Q=h3-h
eff=output/Q *100

#results
print " Heat supplied in the combustor in Btu supplied per lb of air ",round(Q,3)
print " Cycle efficiency in percent",round(eff,3)

 Heat supplied in the combustor in Btu supplied per lb of air  157.7
 Cycle efficiency in percent 28.662