and carbon dioxide which is delivered as a turbine drive gas the drive gas is delivered to the high pressure turbine drive 13 in subsystem 300 via discharge line 10 thermal control of the combustion process can be accomplished by controlling cooling water flow rate to the gas mixing chamber and to the chamber structure via water feed lines 64 and 66 supplied by water service feed line 65 from the water management subsystem 600 the turbine drive subsystem 300 converts the gas generator subsystem 200 output energy into mechanical energy to drive the electrical generator subsystem 400 the turbine subsystem 300 consists of three power turbines pressure staged for optimum efficiency and two inter turbine reheater units to maximize the energy in the drive gas the turbine drive subsystem 300 consists of high pressure power turbine 13 high pressure power turbine exhaust line 11 and high pressure power tap off line 45 this assembly is followed by an inter turbine reheater in which the exhaust temperature is brought back to that at the gas generator outlet by combusting the proper amount of the reactants in the reheater chamber and mixing the output with the main flow stream thus adding energy and maintaining constant inlet temperature going into the next turbine this takes place in the first inter turbine reheater 62 which consists of the reheater 62 and.