e
m
4
1.8
1.6
1.4
z
Y
p! 1.2
i1
I
J 0.8
3
LL
w
2 0.6
I I I I 1 1
0.4 - .r=10
0.2
- r=14
0
I00 125 150 175 200 225 250
PROCESS STEAM TEMPERATURE - Tp (" C)
Fig. 9.7. (Useful heat)/work as a function of process steam temperature (after Porter and Mastanaiah [2]).