Ratio of tube length to shell diameter for a shell and tube heat exchanger is________________?
Correct answer: D. Both B. & C.
- A. 8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
- B. 4 : 1 to 8 : 1 for liquid-liquid exchanger
- C. < 4 : 1 for gas-gas exchangers
- D. Both B. & C.
Explanation
Liquid-liquid exchangers commonly use a tube-length-to-shell-diameter ratio of about 4:1 to 8:1. Gas-gas units generally use a shorter exchanger relative to shell diameter, commonly below 4:1, so both statements apply.
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