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Water is to be heated from 12â—¦C to 70â—¦C as it flows through a 2 centimeter...

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Mechanical Engineering

Water is to be heated from 12â—¦C to 70â—¦C as it flows through a 2centimeter internal diameter, 7 meter long tube. The tube isequipped with an electric resistance heater, which provides uniformheating throughout the surface of the tube. The outer surface ofthe heater is well insulated, so that in steady operation all ofthe heat generated in the heater is transferred to the water in thetube. If the system is to provide hot water at a rate of 8 L/min,determine the power rating of the resistence heater. Also, estimatethe inner surface temperature of the pipe at the exit.

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