Boiler Heat Input An ideal reheat Rankine cycle is characterized by a steam generator pressure of 9MPa, superheat temperature of both the reheated steam and inlet turbine steam of 560 oC, reheat pressure of 1000 kPa, and a condenser pressure of 10 kPa. Determine the total heat input to the system in the boiler. qin = 4040 kJ/kg

Air (c-1.006 kj/kg.k, r-0.287 kj/kg.k) enters a nozzle steadily at 280 kpa and 77°c with a velocity of 50 m/s and exits at 85 kpa and 320 m/s. the heat losses from the nozzle to the surrounding medium at 20°c are estimated to be 3.2 kj/kg. determine (a) the exit temperature and (b) the total entropy change for this process. solve this problem using constant specific heats.