In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones; because the smaller diameter tubes ______________?
Correct answer: C. Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
- A. Are easier to clean
- B. Are less prone to fouling
- C. Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
- D. None of these
Explanation
For the same heat-transfer area, smaller tubes provide more area per unit shell diameter, so the required shell can be smaller and cheaper. Ease of cleaning is usually better with larger tubes, not smaller ones.
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