Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate ?
Correct answer: C. 8
- A. 2
- B. ½
- C. 8
- D. 4
Explanation
In a 1–2 exchanger, splitting the tubes into two passes approximately doubles the tube velocity, making friction loss about four times larger per pass; two passes then give roughly eight times the 1–1 pressure drop. This is why the estimate is 8.
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