If all the conditions and dimensions are same, then the ratio of velocity through the tubes of a double pass heat exchanger to that through the single pass heat exchanger is_________________?
Correct answer: B. 2
- A. 1
- B. 2
- C. 1/2
- D. 4
Explanation
With the same total flow and tube dimensions, a double-pass exchanger sends the flow through roughly half as many parallel tubes during each pass. The flow area is halved, so the tube velocity doubles.
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