How much heat energy a petrol engine would require to do 20 kWh of work? Its adiabatic compression ratio is 9 and ?= 1.5.

Asked by sathish | 12th Jan, 2013, 11:39: PM

Expert Answer:

r= compression ratio=9
?=1.4
so efficiency here=0.952
so W/Qin =0.952
Qin=20/0.952 =21.008 kJ

Answered by  | 15th Jan, 2013, 11:01: AM

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