An air-standard Brayton cycle has a compressor pressure ratio of 10. Air enters the compressor at P4 = 14.7 psia, T4 = 540°R, with a mass flow rate of 90,000 lbm/h. The turbine inlet temperature is 2160°R. Calculate the thermal efficiency and the net power developed, in horsepower, if...
a.) the turbine and the compressor isentropic efficiencies are each 100%.
b.) the turbine and compressor isentropic efficiencies are 88 and 84%, respectively.
c.) the turbine and compressor isentropic efficiencies are 88 and 94%, respectively, and a regenerator with an effectiveness of 80% is incorporated.