Abstract: Various embodiments are provided related to improved gas turbine engine systems. In one example, a system is provided which includes a gas turbine engine having an air inlet stream, a hydrogen fuel supply, and an exhaust stream. The system further includes a heat exchanger configured to cool the exhaust stream from the gas turbine engine. The system can additionally include a recirculation pathway configured to mix the cooled exhaust stream from the heat exchanger with the air inlet stream.

Abstract: The present disclosure presents improved combustion turbine engine systems and related methods. One such system includes a turbine system comprising a high pressure compressor, a high pressure turbine, a combustor, and a recuperator. The system further includes a turbocharger system comprising a low pressure compressor and a low pressure turbine; an air cooler device that is configured to cool intake air output to the low pressure compressor; and a refrigeration system comprising a hot gas heat exchanger and a cold gas heat exchanger, wherein the refrigeration system receives combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system cools the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system, and the refrigeration system further generates steam that is provided to the turbine system. Other systems and methods are also presented.

Abstract: Various embodiments relate to a system and method of suppressing contrails emitted from an aircraft. One such system comprises a semi-closed cycle gas turbine engine of an aircraft that exhausts gases in use; a recuperator component that is positioned within an exhaust gas stream of the semi-closed cycle gas turbine engine to remove a portion of the exhaust gas stream in a form of heat energy; and one or more additional heat exchangers in a recirculation path that are configured to condense the heat energy of the portion of the exhaust gas to remove water vapor from the exhaust gas stream. Other systems and methods are also provided.

Abstract: The present disclosure presents improved combustion turbine engine systems and related methods. One such system includes a turbine system comprising a high pressure compressor, a high pressure turbine, a combustor, and a recuperator. The system further includes a turbocharger system comprising a low pressure compressor and a low pressure turbine; an air cooler device that is configured to cool intake air output to the low pressure compressor; and a refrigeration system comprising a hot gas heat exchanger and a cold gas heat exchanger, wherein the refrigeration system receives combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system cools the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system, and the refrigeration system further generates steam that is provided to the turbine system. Other systems and methods are also presented.

Abstract: Various embodiments relate to combined heat and power (CHP) systems. A CHP system can include a turbine system, a turbocharger system, and a refrigeration system. The refrigeration system can receive combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system can cool the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system.

Abstract: Various embodiments relate to combined heat and power (CHP) systems. A CHP system can include a turbine system, a turbocharger system, and a refrigeration system. The refrigeration system can receive combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system can cool the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system.

Abstract: Various embodiments relate to combined heat and power (CHP) systems. A CHP system can include a turbine system, a turbocharger system, and a refrigeration system. The refrigeration system can receive combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system can cool the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system.

Abstract: Various embodiments relate to combined heat and power (CHP) systems. A CHP system can include a turbine system, a turbocharger system, and a refrigeration system. The refrigeration system can receive combustion products from the turbine system and compressed air from the turbocharger system. The refrigeration system can cool the combustion products and the compressed air to generate a cooled combustion product mixture that is provided to the turbine system.