In a parallel flow heat exchanger, hot water at a flow rate of 1 kg/s is cooled from 90° C to 60 °C with a cooler at a temperature of 40 °C at a flow rate of 2 kg/s. Total heat transfer coefficient 1000 W / m2.K. 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 area for counter-flow heat exchanger status. c) determine the required area, taking into account the state of a cross-flow heat exchanger in which one flow is mixed, in which the other flow is not mixed
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
In a parallel flow heat exchanger, hot water at a flow rate of 1 kg/s is cooled from 90° C to 60 °C with a cooler at a temperature of 40 °C at a flow rate of 2 kg/s.
Total heat transfer coefficient 1000 W / m2.K. 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 area for counter-flow heat exchanger status.
c) determine the required area, taking into account the state of a cross-flow heat exchanger in which one flow is mixed, in which the other flow is not mixed.
d) assume that the output temperature of the hot fluid is not given, take the area 6.42 m2 for the parallel flow heat exchanger state and calculate the output temperature of the hot water using the efficiency-NTU method.
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