Air enters the compressor of a regenerative ideal air-standard Brayton cycle at 100kPa, 300K, with a volumetric flow rate of 4 m3/s. The compressor pressure ratio is 8, the regenerator effectiveness is 75% and the turbine inlet temperature is 1300K. Determine: (a) The back work ratio. (b) The net power developed. (c) The thermal efficiency

A rankine cycle operates between a pressure limit of 6 MPa. and 50 kPa., the steam leaves the boiler at 450 C, the isentropic efficiency of the turbine is 94%, the steam mass flow rate is 20kg/sec. draw the T-S diagram assuming point 1 is at the pumpe entrance. and determine the required power to operate the pump, cycle thermal efficiency. Ans. (122 kW, 30.25%)

Rankine cycle – Consider the ideal cycle shown below and determine the thermal efficiency of the cycle using the steam tables. T 500 °C 3 Wturb,out 9in 6 MPа 10 kPa Jout pump,in