0.2 kg/s of alcohol is to be cooled from 75C to 35C in a counter flow...

 

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0.2 kg/s of alcohol is to be cooled from 75C to 35C in a counter flow heat exchanger. Cooling water enters the exchanger at 12C and at the rate of 0.16 kg/s. The convection heat transfer coefficient between the alcohol and the tube wall is 0.34 kW/mK, and between the tube wall and the water, 0.225 kW/mK. The tubes may be assumed thin. Cp for the alcohol is 2.52 kJ/kgK and for water is 4.187 kJ/kgK. Calculate the capacity ratio, the effectiveness, and the area of heat exchanger surface. 0.2 kg/s of alcohol is to be cooled from 75C to 35C in a counter flow heat exchanger. Cooling water enters the exchanger at 12C and at the rate of 0.16 kg/s. The convection heat transfer coefficient between the alcohol and the tube wall is 0.34 kW/mK, and between the tube wall and the water, 0.225 kW/mK. The tubes may be assumed thin. Cp for the alcohol is 2.52 kJ/kgK and for water is 4.187 kJ/kgK. Calculate the capacity ratio, the effectiveness, and the area of heat exchanger surface.

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To solve this problem we can use the effectivenessNTU Number of Transfer Units method The capacity r... View the full answer