An engine produces 4 MW power and has a thermal efficiency of 30%. Atmospheric air available at 300 K is passed through a heat exchanger to accept the heat rejected by the engine. If this air reaches 700 K as it exits the heat exchanger, what is the mass flow rate of air through the heat exchanger?

An engine produces 4 MW power and has a thermal efficiency of 30%. Atmospheric air available at 300 K is passed through a heat exchanger to accept the heat rejected by the engine. If this air reaches 700 K as it exits the heat exchanger, what is the mass flow rate of air through the heat exchanger?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.17P

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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

An engine produces 4 MW power and has a thermal efficiency of 30%. Atmospheric air available at
300 K is passed through a heat exchanger to accept the heat rejected by the engine. If this air
reaches 700 K as it exits the heat exchanger, what is the mass flow rate of air through the heat
exchanger?

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