Pick out the wrong statement pertaining to a shell and tube heat exchanger ?
Correct answer: D. Disk and doughnut baffle is the most commonly used baffle
- A. The minimum value of baffle spacing is 50 mm
- B. The maximum value of baffle spacing is equal to the I.D. of the shell
- C. The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these
- D. Disk and doughnut baffle is the most commonly used baffle
Explanation
Segmental baffles are the usual choice in shell-and-tube exchangers, not disk-and-doughnut baffles. The stated spacing and unsupported-span limits are commonly used design guidelines, making option d the wrong statement.
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