Heat Transfer
Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the

High heat transfer co-efficient
Less corrosion problems
Low pressure drop
Flexibility possible in the baffle arrangement

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Heat Transfer
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

Temperature of the fin end
Average temperature of the fin
Constant temperature equal to that of the base
Surrounding temperature

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