1. In a combined gas-steam power cycle, the topping cycle is a gas-turbine cycle that has a pressure ratio of 7. Air enters the compressor at 310 K and the turbine at 1310 K. The process in turbines, compressor, and pump are isentropic. The bottoming cycle is a simple ideal Rankine cycle operating between the pressure limits of 7 MPa and 10 kPa. Steam is heated in a heat exchanger by the exhaust gases to a temperature of 00°C. The exhaust gases leave the heat exchanger at 450 K. Determine (a) the ratio of the mass flow rates of the steam and the combustion gases and (b) the thermal efficiency of the combined cycle.

1. In a combined gas-steam power cycle, the topping cycle is a gas-turbine cycle that has a pressure ratio of 7. Air enters the compressor at 310 K and the turbine at 1310 K. The process in turbines, compressor, and pump are isentropic. The bottoming cycle is a simple ideal Rankine cycle operating between the pressure limits of 7 MPa and 10 kPa. Steam is heated in a heat exchanger by the exhaust gases to a temperature of 00°C. The exhaust gases leave the heat exchanger at 450 K. Determine (a) the ratio of the mass flow rates of the steam and the combustion gases and (b) the thermal efficiency of the combined cycle.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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