Page 112 - Sustainability in the Process Industry Integration and Optimization

P r o c e s s I n t e g r a t i o n f o r I m p r ov i n g E n e r g y E f f i c i e n c y 89

PINCH CP
[kW/°C]
40°C 106.7°C 150°C 203.3°C 250°C
C 2 15
1000 kW 150°C
80°C 200°C 4 25
20°C 52.5°C 140°C 180°C
1 20
650 kW 1750 kW 800 kW
140°C T x =181.7 °C 205°C 230°C
3 H 30
1250 kW 700 kW 750 kW

Q Hmin =750 kW Q Cmin =1000 kW
FIGURE 4.56 Completed HEN design.

(a)
CP
PINCH
[kW/°C]
100°C
1 12
100°C
2 20
100°C
3 7
I ?

90°C T > 90°
4 15
90°C T > 90°
5 30

More Hot Streams than Cold Streams
(b)
CP
PINCH
[kW/°C]
100°C
1 12
100°C
2 20
100°C
3 7
90°C
4 15
90°C
5 30

Split a cold stream
FIGURE 4.57 Splitting above the Pinch for N > N .
H C