Film boiling is usually not desired in commercial equipments, because____________________?
Correct answer: A. The heat transfer rate is low in view of the large temperature drop
- A. The heat transfer rate is low in view of the large temperature drop
- B. It is difficult to maintain
- C. It is not economic
- D. None of these
Explanation
Film boiling creates a vapour film that acts as an insulating layer between the heating surface and liquid. Consequently, the heat-transfer coefficient and heat-transfer rate are low despite the large temperature difference.
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