Air enters the compressor of an air-standard Brayton cycle at 100kPa, 300K, with a volumetric flow rate of 5m3/s. The turbine inlet temperature is 1400K. The compressor and Turbine both have isentropic efficiencies of 88%. For pressure ratios of 6,7,8,9,10,11 and 12, tabulate and then graph the following on the same graph using the cold-air standard assumption and briefly discuss the effect of pressure ratio on the following parameters:
a) Thermal efficiency versus pressure ratio
b) Back work ratio versus pressure ratio
c) Net power developed in kW versus pressure ratio