Concept explainers
A shell-and-tube heat exchanger is to heat an acidic liquidthat flows in untinned tubes of inside and outside diameters
(a) Determine the ratio of plastic to metal tube surface areas needed to transfer the same amount of heat.
(b) Determine the ratio of plastic to metal muss associated with the two heat exchanger designs.
(c) The cost of the metal alloy per Unit muss is threetimes that of the plastic. Determine which tubematerial should be specified on the basis of cost.
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Fundamentals of Heat and Mass Transfer
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