In a gas turbine unit, the gases flow through the turbine at a rate of 17 kg/s and the power developed by the turbine is 14000 kW. The gases

enter the turbine 75 m high above the exit line. The enthalpy of the gases had decreased by 840 kJ/kg and the velocities of the gases at inlet and

outlet are 60 and 150 m/s respectively. The specific volume at the inlet of the gas is 0.5m3/kg and the area of the pipe at exit is 0.17m2.

a)

Calculate the rate at which heat is rejected from the turbine in kw.

b)

The inlet area of the pipe.

The specific volume of the gas at the exit.