Calculate the efficiency of a petrol engine if the compression ratio is 9. y=1.4. If the power of the engine is 30 kW, what is its input power ?

Calculate the efficiency of a petrol engine if the compression ratio i

1.	Calculate the efficiency of a petrol engine if the compression ratio is 9. y=1.4. If the power of the engine is 30 kW, what is its input power ?
Answer» Solution :`eta =1 - (1// rho ) 6( gamma - 1) , rho = 9, gaamma = 1. 4` Solving `eta = 0. 5846= 58.46%` (Input = OUTPUT `//eta = 30 xx 10 ^(3) //0.5846 = 5.13 xx 10 ^(4) W)`