Air enters a regenerator at a pressure of 1MPa, temperature of 550 K and mass flow rate of 800 Kkg/min. Heat is transfered to the air at a rate of 3200 KJ/s. Exhaust gases enter the regenerator at a pressure of 140 KPa, temperature of 800 K and leave at a pressure and temperature of 130 KPa and 600 K. Treat exhaust gases as air.