With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT_________________?
Correct answer: A. Decreases very rapidly
- A. Decreases very rapidly
- B. Increases very rapidly
- C. Remains constant
- D. Increases linearly
Explanation
As the temperature drop or approach becomes more severe, the exchanger temperature profile departs further from the ideal counter-current profile, causing the LMTD correction factor to fall sharply. A lower correction factor means more area is needed for the same heat duty.
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