21-32
21.34 (contd)
21-33
21.34 (contd)
21-34
21.35 (see supplemental information on page 21-30)
21-35
21.35 (contd)
21-36
21.35 (contd)
21-37
18.36
Cooling Water Energy Balance
Performance Equation
Q2
Q
1
1U2
U1
A2
A1
TLM 2
TLM 1
Process Gas
100 C
Process Gas
50 C
18.37
Process Stream
Cooling Water
Q2
Q
1
0.7 mcw 2Cpw2
mcw1Cpw1
t230 C
40 C – 30 C
0.7 Mcw
t230 C
10 C
Performance Equation
Q2
Q
1
0.7 U2A2TLM 2
U1A1TLM 1
Process
70 C
Process
35 C
21-39
0.7 0.8073
13.95 C
65 C t2
ln 70 Ct25 C
21-40
18.38
Design Conditions
Performance Equation
Q2
Q
1
U2
U1
A2
A1
TLM 2
TLM 1
Process
50 C; 2 kg/s
Process
100 C
Steam
160 C
Steam
160 C
hi = 200 W/m2K
ho = 5000 W/m2K
21-41
Q1.113 50 C
82.49 C ln T50 C T100 C
Q0.6746
ln T50 C
T100 C
(Equation 3)