Brayton Cycle The cycle of Problem 9.42 is modified to include the effects of irr...

Brayton Cycle

The cycle of Problem 9.42 is modified to include the effects of irreversibilities in the adiabatic expansion and compression processes. If the states at the compressor and turbine inlets remain unchanged, the cycle produces 10 MW of power, and the compressor and turbine isentropic efficiencies are both 80%, determine

(a) the pressure, in kPa, temperature, in K, and specific enthalpy, in kJ/kg, at each principal state of the cycle and sketch the T–s diagram.

(b) the mass flow rate of air, in kg/s.

(c) the rate of heat transfer, in kW, to the working fluid passing through the heat exchanger.

(d) the thermal efficiency.