An air-standard brayton cycle has a compressor pressure, Ask an Expert

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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.

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