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A double pipe parallel flow H.E. use oil (cp = 1.88 kJ/kg.K) at an initial temperature of 205C to heat water, flowing at 225kg/h from

A double pipe parallel flow H.E. use oil (cp = 1.88 kJ/kg.K) at an initial temperature of 205C to heat water, flowing at 225kg/h from 16C to 44C. The oil flow rate is 270 kg/h.

a) what is the heat transfer area required for an overall heat transfer coefficient of 340 W/m2.K.

b) Determine the number of transfer unit (NTU).

c) Calculate the effectiveness of the H.E.

Please write clearly and show steps and formula.

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