Steam enters an adiabatic turbine at 8 MPa and 500C with a mass flow rate of 3kg/s and leaves at 30kPa. The isentropic efficient of the turbine is 0.90. Neglecting the kinetic energy change of the steam, determine :
a. the temperature at the turbine exit
b. The power output of the turbine. ( 3054 kW)

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.