For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it__________________?
Correct answer: C. Increases the overall heat transfer coefficient
- A. Decreases the pressure drop
- B. Decreases the outlet temperature of cooling medium
- C. Increases the overall heat transfer coefficient
- D. None of these
Explanation
Multipassing increases the tube-side fluid velocity for the same flow rate and flow area per pass. The resulting higher Reynolds number increases the tube-side film coefficient and usually raises the overall heat-transfer coefficient.
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