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In: Mechanical Engineering

Cold water inside / outside diameter in the same axis two pipe heat exchanger used as...

Cold water inside / outside diameter in the same axis two pipe heat exchanger used as engine oil cooler
It enters the 25/30 mm steel pipe at a temperature of 15 degrees at a speed of 0.5 m / s, Take off at a temperature of 25 degrees.Hot oil, on the inside / outside diameter of 40/46 mm steel pipe, at a temperature of 60 degrees with a speed of 0.25 m / s.
enters.it is desired to cool the oil 5 degrees, according to this :
A)Find pipe length for parallel flow?
B)Find the pipe length for reverse flow. Examine the results
C) Calculate the pressure loss of the oil and the required pump power in reverse flow.

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