Abstract: The present invention relates to a method and system for increasing power output and enhancing efficiency of an internal combustion engine, which comprises: cooling exhaust gas of the engine in a recuperating heat exchanger by transferring heat to stored air; compressing the exhaust gas to a pressure requisite for admission into the engine utilizing a compander module powered by expanding previously compressed and stored air in an expander without parasitic power consumption; mixing the exhaust gas with expanded air; and cooling or heating the exhaust gas to a suitable temperature in a final trim cooler or heater and supplying the exhaust gas to the engine at a pressure requisite at an admission point, without the need for additional compression and concomitant parasitic power consumption needed for exhaust gas recirculation. Extra electric power output and higher thermal efficiency is facilitated by using the excess power generation from the compander in a synchronous AC generator.

Abstract: In a gas turbine system including a first gas turbine generator, a heat recovery steam generator and a steam turbine generator heat rejection system, the present invention relates to a method for CO2 capture from flue gas in said system, said method including: (a) diverting an amount of heat recovery steam generator flue gas from the CO2 capture plant; and (b) mixing the diverted heat recovery steam generator flue gas with an air stream, forming a combined gas stream, wherein (1) the combined gas stream is fed to a second gas turbine generator; (2) exhaust gas from the second gas turbine generator is mixed with exhaust gas from the first gas turbine generator, forming a combined exhaust gas stream; and (3) the combined exhaust gas stream enters the heat recovery steam generator, with the CO2 content of the combined exhaust gas stream increased through supplementary firing in the heat recovery steam generator.

Abstract: Embodiments provide systems and methods for taking power from an electric power grid and converting it into higher-pressure natural gas for temporary storage. After temporary storage, the higher-pressure natural gas may be expanded through an expansion engine to drive a generator that converts energy from the expanding natural gas into electrical power, which may then be returned to the electric power grid. In this way, the disclosed systems and methods may provide ways to temporarily store, and then return stored power from the electric power grid. Preferably, the components of the system are co-located at the same natural gas storage facility. This allows natural gas storage, electrical energy storage, and electrical energy generation to take place at the same facility.

Abstract: Embodiments provide systems and methods for taking power from an electric power grid and converting it into higher-pressure natural gas for temporary storage. After temporary storage, the higher-pressure natural gas may be expanded through an expansion engine to drive a generator that converts energy from the expanding natural gas into electrical power, which may then be returned to the electric power grid. In this way, the disclosed systems and methods may provide ways to temporarily store, and then return stored power from the electric power grid. Preferably, the components of the system are co-located at the same natural gas storage facility. This allows natural gas storage, electrical energy storage, and electrical energy generation to take place at the same facility.

Abstract: In a gas turbine system including a first gas turbine generator, a heat recovery steam generator and a steam turbine generator heat rejection system, the present invention relates to a method for CO2 capture from flue gas in said system, said method including: (a) diverting an amount of heat recovery steam generator flue gas from the CO2 capture plant; and (b) mixing the diverted heat recovery steam generator flue gas with an air stream, forming a combined gas stream, wherein (1) the combined gas stream is fed to a second gas turbine generator; (2) exhaust gas from the second gas turbine generator is mixed with exhaust gas from the first gas turbine generator, forming a combined exhaust gas stream; and (3) the combined exhaust gas stream enters the heat recovery steam generator, with the CO2 content of the combined exhaust gas stream increased through supplementary firing in the heat recovery steam generator.

Abstract: A system including a gas turbine system configured to transition between a first load state and a second load state, wherein the gas turbine system comprises an airflow control module configured to adjust an airflow through the gas turbine system between a minimum airflow condition and a maximum airflow condition, and a controller configured to control the gas turbine system to operate with a load path between a first load path corresponding to the minimum airflow condition and a second load path corresponding to the maximum airflow condition, wherein the controller is configured to control the gas turbine system to transition between the first load state and the second load state using the load path between the first and second load paths.

Abstract: The present application provides a combined cycle system. The combined cycle system may include a heat recovery steam generator with a first low pressure section and a second low pressure section, a steam turbine with a low pressure steam section in communication with the second low pressure section of the heat recovery steam generator, and a duct burner positioned upstream of the heat recovery steam generator.

Abstract: Embodiments of the present disclosure are directed towards a system that includes a recirculation system. The recirculation system includes a compressor discharge air line extending from a compressor to an air intake. The compressor discharge air line is configured to flow a compressor discharge air flow, and the air intake is configured to supply an air flow to the compressor. An ejector is disposed along the compressor discharge air line between the compressor and the air intake. The ejector is configured to receive and mix the compressor discharge air flow and a turbine exhaust flow to form a first mixture.

Abstract: The present application provides a steam cycle system. The steam cycle system may include a source of steam, a steam turbine, a condenser, a steam turbine bypass system such that steam from the source of steam may bypass the steam turbine and be routed to the condenser, and one or more thermoelectric generators positioned about the steam turbine bypass system. The one or more thermoelectric generators may generate a direct current based upon temperature differences between steam and water of the steam cycle system.

Abstract: The present application provides a combined cycle system. The combined cycle system may include a heat recovery steam generator with a first low pressure section and a second low pressure section, a steam turbine with a low pressure steam section in communication with the second low pressure section of the heat recovery steam generator, and a duct burner positioned upstream of the heat recovery steam generator.

Abstract: A system may include an insulated water tank configured to store a first heated water from a first plant component during operation of a plant, and a fuel heater comprising a heat exchanger, wherein the heat exchanger is configured to transfer heat from the first heated water to a fuel for a gas turbine engine during startup of the plant.

Abstract: A system including a gas turbine system configured to transition between a first load state and a second load state, wherein the gas turbine system comprises an airflow control module configured to adjust an airflow through the gas turbine system between a minimum airflow condition and a maximum airflow condition, and a controller configured to control the gas turbine system to operate with a load path between a first load path corresponding to the minimum airflow condition and a second load path corresponding to the maximum airflow condition, wherein the controller is configured to control the gas turbine system to transition between the first load state and the second load state using the load path between the first and second load paths.

Abstract: Embodiments of the present invention may provide to a gas turbine a fuel gas saturated with water heated by a fuel moisturizer, which receives heat form a flash tank. A heat source for the flash tank may originate at a heat recovery steam generator. The increased mass flow associated with the saturated fuel gas may result in increased power output from the associated power plant. The fuel gas saturation is followed by superheating the fuel, preferably with bottom cycle heat sources, resulting in a larger thermal efficiency gain.

Abstract: A system including a gas turbine system and an electrolysis unit configured to produce a hydrogen gas for reducing a minimum emissions compliance load of the gas turbine system.

Abstract: Embodiments of the present disclosure are directed towards a system that includes a recirculation system. The recirculation system includes a compressor discharge air line extending from a compressor to an air intake. The compressor discharge air line is configured to flow a compressor discharge air flow, and the air intake is configured to supply an air flow to the compressor. An ejector is disposed along the compressor discharge air line between the compressor and the air intake. The ejector is configured to receive and mix the compressor discharge air flow and a turbine exhaust flow to form a first mixture.

Abstract: The present application provides a steam cycle system. The steam cycle system may include a source of steam, a steam turbine, a condenser, a steam turbine bypass system such that steam from the source of steam may bypass the steam turbine and be routed to the condenser, and one or more thermoelectric generators positioned about the steam turbine bypass system.

Abstract: Embodiments of the present invention may provide to a gas turbine a fuel gas saturated with water heated by a fuel moisturizer, which receives heat form a flash tank. A heat source for the flash tank may originate at a heat recovery steam generator. The increased mass flow associated with the saturated fuel gas may result in increased power output from the associated power plant. The fuel gas saturation is followed by superheating the fuel, preferably with bottom cycle heat sources, resulting in a larger thermal efficiency gain.

Abstract: A combined cycle power plant includes a first engine, a second engine, a first heat recovery steam generator, a second heat recovery steam generator, and a steam turbine. The second engine is relatively more productive but less efficient than the first engine. The first engine generates a first exhaust gas, and the second engine generates a second exhaust gas. The first heat recovery steam generator transfers excess energy from the first exhaust gas to a first flow of water, creating a first flow of steam. The second heat recovery steam generator transfers excess energy from the second exhaust gas to a second flow of water, creating a second flow of steam. The second heat recovery steam generator further transfers excess energy from the second exhaust gas to the first flow of steam and the second flow of steam, creating a flow of superheated steam. The steam turbine receives the flow of superheated steam from the second heat recovery steam generator.

Abstract: A gas turbine system includes a compressor, an expander, a combustor disposed between the compressor and the expander, a boiler disposed between the compressor and the expander, a conduit including chargeable air and in thermal communication with the boiler and an external free heat source coupled to the boiler.

Abstract: A system for power generation comprises an engine operative to output an exhaust gas, a carbon capture means operative to remove carbon dioxide (CO2) from the exhaust gas and output the CO2, and a compressor operative to receive the CO2 and output compressed CO2 that cools a component of the engine.