This engine is taken to an altitude of 3 km where the ambient temperature and pressure are 22 C and 0.725 bar respectively. A mechanically coupled supercharger is fitted to the engine which consumes 13 % of the total power developed by the engine. The temperature of air leaving the supercharger is 36 C.

1..Determine the degree of supercharging required to increase the brake power of sea level by 10 % more.

2..Calculate the isentropic efficiency of the compressor.

Assume that air-fuel ratio, thermal efficiency and volumetric efficiency remain the same for naturally aspirated and supercharged engine.