Page 209 - Chemical Process Equipment - Selection and Design
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8.3. HEAT TRANSFER COEFFICIENTS 181
CI_) NTU, = AW/C,
I. B
m. 9
8. 8
0. 7
B. 6
a. 3
II
ca B. 2
m. I
8. 0
8.8 8.1 8.2 0.3 8.4 8.5 8.6 8.7 0.E 0.9 1.0
(a)
1. I ‘ a2 a3 a4 0.5 8.8 1. B
E. Q
I. 2
0. B
1. 4
B.?
1.6
a B
1.e
B. 5 2.0
L4 2. 5
3. E
a3
1. 0
B.2 5. B
LI
m.8
BB LI m.2 m.3 a4 as ao 0.7 a8 LO 1.0
(b)
Figure 8.7. 6 correction charts for mean temperature difference: (a) One shell pass and any multiple of two tube passes. (b) Two shell passes
and any multiple of four tube passes. [(HEDH, 1983); after Mueller in Rohsenow and Hartnett, Handbook of Heat Transfer, Section 18,
McGraw-Hill, hkw Fork, 1973. Other cases also are covered in these references.]
