A gas turbine for an automobile is designed with a regenerator. Air enters the compressor of this engine at 100 kPa and 30°C. The compressor pressure ratio is 8; the maximum cycle temperature is 800°C; and the cold airstream leaves the regenerator 10°C cooler than the hot airstream at the inlet of the regenerator. Assuming both the compressor and the turbine to be isentropic, determine the rates of heat addition and rejection for this cycle when it produces 115 kW. Use constant specific heats at room temperature.
A) Heat addition: 270 kW, Heat rejection: 155 kW
B) Heat addition: 155 kW, Heat rejection: 270 kW
C) Heat addition: 115 kW, Heat rejection: 115 kW
D) Heat addition: 270 kW, Heat rejection: 270 kW
