Air enters a three-stage gas turbine at 100 kPa and 17 degree Celsius. This system uses a regenerator as well as reheating and interfolding. The pressure ratio across each compressor is 14.16; 300 kJ/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20 degrees Celsius. Determine the system's thermal efficiency.
Assume isentropic expansions for all compressor and the turbine stages and use constant specific heats at room temperature