Thermodynamics Mech3001 - Week 9 - Problem 3 (9.91)

9.91 A simple Brayton cycle with air as the working fluid, has minimum and maximum cycle temperatures of 27°C and 727°C. It is designed so that maximum cycle pressure is 2000 kPa and minimum cycle pressure of 100 kPa. Considering isentropic efficiency of 80% for the compressor and 90% for the turbine and 50 kPa pressure drop across the combustion chamber, determine

a) The net work produced per unit mass
b) the thermal efficiency

Use constant specific heats at room temperature.