In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by________________?
Correct answer: A. 4(0.86P2 - πd2/4)/πd
- A. 4(0.86P2 - πd2/4)/πd
- B. (P2 - πd2/4)/πd
- C. 4(0.86P2 - πd2)/πd
- D. (4P2 + πd2/4)/πd
Explanation
Equivalent diameter is four times the flow area divided by the wetted perimeter. For triangular pitch, the flow area per tube is approximately 0.86P² minus the tube cross-sectional area, giving option a.
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