In order to cool a mass flow rate of 55 Kg/h of air (cp = 1060 J/KgoC) at 300o C, it is passed through the tube side of a counter flow heat exchanger with a length of 2 m and 2.54 cm tube outer diameter. The cooling water, (cp = 4182 J/Kg o C and ρ = 1000 Kg/m3 ), enters the heat exchanger at a temperature of 30o C with a volume flow rate of 0.6 Litre/min. If the overall heat transfer coefficient, U, is 5.83 W/m2oC and the effectiveness of the heat exchanger 60 %, calculate the following: a. The heat transfer rate, b. The exit temperatures of both the water and the air, c- The surface area of the heat exchanger,
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 order to cool a mass flow rate of 55 Kg/h of air (cp = 1060 J/KgoC) at 300o C, it is passed through the tube side of a counter flow heat exchanger with a length of 2 m and 2.54 cm tube outer diameter. The
cooling water, (cp = 4182 J/Kg o C and ρ = 1000 Kg/m3 ), enters the heat exchanger at a temperature of 30o C with a volume flow rate of 0.6 Litre/min. If the overall heat transfer coefficient, U, is 5.83 W/m2oC and
the effectiveness of the heat exchanger 60 %, calculate the following:
a. The heat transfer rate,
b. The exit temperatures of both the water and the air,
c- The surface area of the heat exchanger,
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