A cross-flow heat exchanger (unmixed-unmixed) is marketed as an oil cooler (same properties as unused engine oil). Oil enters the cooler at a flow rate of 1 g/s and a temperature of 75°C. The oil should be cooled to 65°C. Air is used to cool the oil. The air inlet velocity is 0.406 m/s and the frontal area through which the air flows is 254 mm x 254 mm. The air inlet temperature is 27°C. Take the average temperature of the oil to be 70°C and that of the air to be 27°C. Is this exchanger large enough? Show the details of your answer.

A cross-flow heat exchanger (unmixed-unmixed) is marketed as an oil cooler (same properties as unused engine oil). Oil enters the cooler at a flow rate of 1 g/s and a temperature of 75°C. The oil should be cooled to 65°C. Air is used to cool the oil. The air inlet velocity is 0.406 m/s and the frontal area through which the air flows is 254 mm x 254 mm. The air inlet temperature is 27°C. Take the average temperature of the oil to be 70°C and that of the air to be 27°C. Is this exchanger large enough? Show the details of your answer.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

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.

Question

A cross-flow heat exchanger (unmixed-unmixed) is marketed as an oil cooler
(same properties as unused engine oil). Oil enters the cooler at a flow rate of 1 g/s
and a temperature of 75°C. The oil should be cooled to 65°C. Air is used to cool
the oil. The air inlet velocity is 0.406 m/s and the frontal area through which the
air flows is 254 mm x 254 mm. The air inlet temperature is 27°C. Take the
average temperature of the oil to be 70°C and that of the air to be 27°C. Is
this exchanger large enough? Show the details of your answer.

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