Page 279 - Chemical engineering design

254
CHEMICAL ENGINEERING
Shell and tube heat exchangers
Time base mid 2004
1000.0 4
Exchanger cost, £1000 100.0 2 1 3

10.0

1.0
10.0 100.0 1000.0
Heat transfer area, sq m
(a) Pounds sterling

Shell and tube heat exchangers
Time base mid 2004
1000.0

4 3
Exchanger cost, $1000 100.0 1
2

10.0

1.0
10.0 100.0 1000.0
Heat transfer area, sq m
(b) US dollars

Materials Pressure factors Type factors
Shell Tubes
1 10 bar ð 1.0 Floating head ð 1.0
1 Carbon steel Carbon steel 10 20 ð 1.1 Fixed tube sheet ð 0.8
2 C.S. Brass 20 30 ð 1.25 U tube ð 0.85
3 C.S. Stainless steel 30 50 ð 1.3 Kettle ð 1.3
4 S.S. S.S. 50 70 ð 1.5

Figure 6.3a, b. Shell and tube heat exchangers. Time base mid-2004
Purchased cost D (bare cost from figure) ð Type factor ð Pressure factor