In a parallel flow heat exchanger, with a cooler at 40 °C at a flow of 2 kg / h, hot water at 1 kg / h is cooled from 90 ° C to 60 ° C. The total heat transfer coefficient is 1000 W / m2K. Cph = Cpc =...

In a parallel flow heat exchanger, with a cooler at 40 °C at a flow of 2 kg / h, hot water at 1 kg / h is cooled from 90 ° C to 60 ° C.

The total heat transfer coefficient is 1000 W / m2K. Cph = Cpc = 4182 J / kgK. According to this;

a) Determine the required area for the heat exchanger using the logarithmic mean temperature difference method.
b) Determine the required space for the counterflow heat exchanger case.
c) Determine the required area considering the case of the cross-flow heat exchanger where one stream is mixed and the other is not mixed.
d) Assuming that the exit temperature of the hot fluid is not given, for the case of the parallel flow heat exchanger, take the area of 6.42 m2 and calculate the exit temperature of the hot water using the efficiency-NTU method.