The equivalent diameter for pressure drop is ________________ that for heat transfer?
Correct answer: D. Smaller than
- A. Not related with
- B. Greater than
- C. Equal to
- D. Smaller than
Explanation
The pressure-drop equivalent diameter uses the full wetted perimeter, whereas the heat-transfer equivalent diameter uses only the heated perimeter. The larger heat-transfer diameter therefore makes the pressure-drop diameter smaller.
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