Reference no: EM13607802

An engine operates on an air-standard Brayton cycle with reheat. The work required to compress the air in one stage form 1 bar to 10 bar is 361 kJ/kg. The first turbine stage exhausts to a pressure of 7 bar with an isentropic efficiency of 80%. The following temperatures are known: Compressor inlet = 373 K Compressor outlet = 720 K First/Second turbine stage inlet = 1500 K Second turbine stage outlet = 1000 K Determine the following: i) The compressor efficiency, assuming constant specific heat ( Cp = 1.005 kJ/kg * K, k = 1.4) ii) The primary combustor heat transfer (kJ/kg), assuming variable specific heat iii) The first turbine stage exhaust enthalpy (kJ/kg), assuming variable specific heat iv) The secondary combustor heat transfer (kJ/kg), assuming variable specific heat v) The second turbine stage efficiency, assuming constant specific heat (Cp = 1.005 kJ/kg*K, k = 1.4) vi) The cycle thermal efficiency.