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A THIN-WALLED DOUBLE-PIPE, COUNTER-FLOW HEAT EXCHANGER IS TO BE USED TO COOL OIL

A THIN-WALLED DOUBLE-PIPE, COUNTER-FLOW HEAT EXCHANGER IS TO BE USED TO COOL OIL

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Author: Joyce Buda
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http://theperfecthomework.com/a-thin-walled-double-pipe-counter-flow-heat-exchanger-is-to-be-used-to-cool-oil-cp-2-2-kj-kgdegc-from-150oc-to-40oc-at-a-rate-of-2-3-kg-s-by-water-cp-4-18-kj-kgoc-that-enters-at-20degc/


A thin-walled double-pipe, counter-flow heat exchanger is to be used to cool oil (cp = 2.2 kJ/kgdegC) from 150oC to 40oC at a rate of 2.3 kg/s by water (cp = 4.18 kJ/kgoC) that enters at 20degC at a rate of 1.4 kg/s. The diameter of the tube is 13 cm and its length is 60 m. Determine the overall heat transfer coefficient of this heat exchanger using (a) LMTD and (b) -NTU method.


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