The stream of air and gasoline vapour,in the ratio of 14:1 by mass, enters a gasoline engine at a temperature of 30C and leaves as combustion products at a temperature of 790C. The engine has a specific fuel consumption of 0.3kg/kWh.The net heat transfer rate from the  fuel-air stream to the jacket cooling water and to the surroundings is 35kW.The shaft power delivered by the engine is 26kW.Compute the increase in specific enthalpy of the fuel-air stream, assuming the changes in kinetic and potential energy to be negligible.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The stream of air and gasoline vapour,in the ratio of 14:1 by mass, enters a gasoline engine at a temperature of 30C and leaves as combustion products at a temperature of 790C. The engine has a specific fuel consumption of 0.3kg/kWh.The net heat transfer rate from the  fuel-air stream to the jacket cooling water and to the surroundings is 35kW.The shaft power delivered by the engine is 26kW.Compute the increase in specific enthalpy of the fuel-air stream, assuming the changes in kinetic and potential energy to be negligible.

 

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