A large adiabatic compressor receives air from the ambient at 95 kPa, 20 deg C with negligible velocity. The air exits the compressor at 1.52 MPa, 430 deg C, and with a velocity of 90 m/sec. The power input to the compressor is 5000 kW. Find the mass flow rate of air through the compressor

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.