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Effectiveness-NTU Curves for Shell and Tube Heat Exchangers 1
0
1
2
4
c=0
c=C min /C max
0.9
3
0.8
0.6
0.9
0.4
0.8 0.7 0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2
0
1
0.2
1 shell Any multiple of 2 tube es
0.1 0
1
2
0
1
2
0.9
NTU
0
4
5
3
4
5
c=0.2
c=0
c=C min /C max
0.1
3
0.4 0.6 0.8 1.0
0.8 0.7
ϵ
1
c=0.2 0.6 0.8 1.0
0.7
ϵ
5
1 0.9 0.8 0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.3
0.3
0.2 0.1 0
0.2
2 shell es Any multiple of 4 tube es
0
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1
2
NTU
3
4
0.1 5
0
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1
0
1
2
3
c=0
0.9
4
0.2
c=C min /C max
0.4
0.8
0.6
5
1 0.9
0.8 1.0
0.8
0.7
0.7
0.6
0.6
ϵ 0.5
0.5
0.4
0.4
0.3
0.3 4 shell es Any multiple of 8 tube es
0.2
0.2
0.1 0
1
0.1 0
1
2
0
1
2
c=C min /C max
0.9
c=0
NTU
0.2
3
4
5
3
4
5
0.4
0.6
0.8
0.8
ϵ
0
1 0.9
1.0
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.4
0.3
0.3 8 shell es Any multiple of 16 tube es
0.2
0.2
0.1 0
0.1 0
1
2
NTU
3
4
Based on the equations in “Fundamentals of Heat and Mass Transfer”, 7 th Edition by T. Bergman et al., McGraw-Hill, 2011.
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5
0