From ESS,

at P-8 Mpa at T-480°C

h₁=3349.52 KJ/kg, S1-S2= 6.6610KJ/kg-K

At condenser Pressure, P=.00 Mpa

hf=173.85hfg=2403.1, Sg-8.2287, SF0.5926

Quality, x is given by

S₂ - Sf

Sa-Sr

x =

X=

6.6586 0.5926

8.2287

0.5926

x=0.7943

h2s hf+x*hfg=173.88+0.7943*2403.1=2083.37KJ/kg

h₂=2083.37KJ/kg

h3=173.85KJ/kg

h4s-h3+0 (P1-P2)=173.88+ 1.0084 (8-.008)-181.91 KJ/kg

h4=181.91 KJ/kg Condenser Pressure (KPa)

8

10

15

30

50

Wnet

qin

Wt

(KJ/kg)

Wp

(KJ/kg)

gout

(KJ/kg)

(KJ/kg) (KJ/kg) (KJ/kg)

1266.16

8.06

1258.10 3167.62 1909.52

1240.20

8.07

1232.12 3149.64 1917.52

1191.55

8.10

1183.45 3115.49 1932.04

1103.64

8.15 1095.49 3052.15 1956.66

1034.64 8.19 1026.46 3000.86 1974.41

efficiency

(%)

39.72

39.12

37.99

35.89

34.21