LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?
Correct answer: D. < 1
- A. 0
- B. 1
- C. > 1
- D. < 1
Explanation
A cross-flow exchanger does not achieve the ideal countercurrent temperature distribution, so its LMTD correction factor is below unity. Increasing the number of shell passes generally raises the correction factor toward 1, but a single-pass cross-flow unit has F < 1.
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