US Patent 7426832 Universal thermodynamic gas turbine in a closed Carnot cycle

A closed-cycle gas turbine power generator system with a combined cycle system with a neutral gaseous primary motive medium and a secondary phase change medium with a lower pressure sub-system having a counter-rotating compressor module in combination with a counter-rotating gas turbine module, and with a higher pressure sub-system having a counter-rotating compressor module and a counter-rotating gas turbine module wherein the phase change medium in liquid form is injected into the compressor modules during compression of the primary motive medium with the phase change medium changing to a gas to form a compressed gaseous mixture that is heated by the heat source and supplied to the gas turbine module of the higher pressure sub-system for partial expansion and combining with a heated portion of the compressed gaseous mixture from the compressor module for final expansion in the lower pressure gas turbine modules.