A combined cycle power plant has a net power output of 264 MW. Air enters the compressor of the Brayton cycle at 100 kPa and 17oC. The pressure ratio is 20, the turbine inlet temperature is 1620 K and the gases leaving the turbine are used to heat the steam of the Rankine cycle to 600oC and 6 MPa. The combustion gas leaves the heat exchanger (HRSG) at 400 K and the condenser pressure is 10 kPa. The isentropic efficiency of the compressor is 87%, the gas turbine isentropic efficiency is 90%, the steam turbine isentropic efficiency is 92% and the pump efficiency is 65%. The condenser sub-cools the water by 10oC (10oC less than the saturation temperature). Using variable specific heat analysis, determine