For the above Brayton cycle, determine the ideal thermal efficiency. 

a. 49.6%,

b. 60.1%

c. 42.2%

d. 35.4%.

Brayton cycle Consider a gas-turbine engine operating with 20 kg/s of air entering at 300 K and a pressure ratio of 11. Using an ideal air-standard cycle as a model of this engine, determine the ideal thermal efficiency and the net shaft power delivered to the load. Assume the turbine inlet temperature is 1050 K.