Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________?
Correct answer: A. Less than arithmetic mean value
- A. Less than arithmetic mean value
- B. More than arithmetic mean value
- C. More than geometric mean value
- D. Both B. & C.
Explanation
The logarithmic mean temperature difference lies between the geometric and arithmetic means, and the multipass correction factor further reduces the effective value. Thus it is less than the arithmetic mean, while option B states the opposite.
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