The present disclosure relates to power plants. The teachings thereof may be embodied in processes for producing ammonia and energy, e.g., a method for producing ammonia and energy comprising: spraying or atomizing an electropositive metal; burning the metal with a reaction gas; mixing the reacted mixture with water; separating the mixture into (a) solid and liquid constituents and (b) gaseous constituents; at least partially converting energy of the solid and liquid constituents and of the gaseous constituents; and separating ammonia from the gaseous constituents. Mixing the reacted mixture may include spraying or atomizing the water or the aqueous solution or the suspension of the hydroxide of the electropositive metal into the reacted mixture.

A propulsion system includes a gas turbine engine, an electric motor system having a motor drive electrically connected to the electric machine and an electric motor electrically connected to the motor drive where the electric motor drives a propulsion unit, an electric machine rotatably attached to the gas turbine engine and electrically connected to the electric motor system, an energy storage system having bi-directional electrical connections with the electric motor system and the electric machine, and an Rankine cycle system in communication with the gas turbine engine for recovering waste heat from the gas turbine engine.

A heat recovery system for an engine having an exhaust nozzle whereby exhaust gas is expelled, the heat recovery system comprising a steam generator that supplies hot vaporized coolant to a turbine generator which creates electrical energy. The electrical energy is used to power air compressors that supply clean outside air to the passenger compartment of the aircraft.

An occupant support includes a framework which includes a frame, an orientation adjustable deck section supported by the frame, and a lockable gas spring whose components include a piston assembly coupled to one of the frame and the deck section and a cylinder coupled to the other of the frame and the deck section. The piston assembly includes a piston and a connecting rod. The piston divides the interior of the cylinder into an isolated compartment and a non-isolated compartment. The non-isolated compartment has an inlet and an outlet. An outflow check valve resists fluid flow out of the non-isolated compartment and admits ambient fluid into the non-isolated compartment. An inflow check valve resists fluid flow into the non-isolated compartment and enables fluid flow out of the non-isolated compartment. A turbine receives fluid which flows out of the non-isolated compartment. An electrical generator is coupled to the turbine.

A low emission, high efficiency Gas Turbine engine operating on a combination of Natural Gas and Bio Gas as fuel, driving either a high efficiency turbo-blower or a high efficiency Turbo Pump system combined with heat recovery systems and in other embodiments is provided a generator of electricity or providing evaporative cooling from using the remaining waste heat in the exhaust gas.

Gas turbine engines are described. The gas turbine engines includes a compressor section, a combustor section, a turbine section, and a nozzle section. The compressor section, the combustor section, the turbine section, and the nozzle section define a core flow path that expels through the nozzle section. A cooling duct is provided that is separate from the core flow path. A waste heat recovery system is arranged with a heat rejection heat exchanger arranged within the cooling duct and a blower is arranged within the cooling duct and configured to generate a pressure drop across the heat rejection heat exchanger.

A water/steam system for a combined cycle power plant and related method for operating said system are provided. The system comprises a heat recovery steam generator providing a flue gas stream path for extracting heat from a flue gas stream exhausted from a gas turbine, the heat recovery steam generator having a low pressure section including a low pressure evaporator arranged along the flue gas stream path for generating low pressure steam at a low pressure input level for a main input of a low pressure steam turbine. To use heat a low temperatures, embodiments of the system provide that in the low pressure section, additional sub low pressure steam, at a sub low pressure level below the low pressure level, is generated by a sub low pressure evaporator in the flue gas stream path.

A gas compressor comprising a drum affixed to a rotating shaft, the drum including a plurality of compression channels between a common pressure zone and an interior surface of the drum distal to an axis of rotation. A static vane return assembly adjacent the compression channels includes vanes extending from an inlet at an outer circumference to the common pressure zone and directing gas into the common pressure zone, either through the vanes or via separate channels or ducts. Fluid inside the rotating dmm forms an annular lake that is drawn through the vanes and into the common pressure zone. Fluid is then forced into the compression channels where gas in the fluid is compressed as it travels from the common pressure zone toward the interior surface. The pressurized gas is separated from the liquid prior to leaving the compression channel assembly while the liquid is returned to the lake.

A system includes a generator using a fluid mixture obtained via a generator inlet, a compressor having a compressor inlet that is connected to a generator outlet by a first set of conduits, a second set of conduits connected to the compressor outlet and the generator inlet, and a sensor in communication with the second set of conduits, where a portion of the fluid mixture includes gas from a hydrocarbon well, and where exhaust fluid of the generator is provided to the compressor. A process includes obtaining a target fluid property and a fluid measurement using the sensor and modifying a parameter of a fluid control device to modify a first flow rate of the flow of the exhaust fluid through the second set of conduits relative to a second flow rate of the flow of the gas provided by the hydrocarbon well through the first set of conduits.

A microchannel heat exchanger (MCHX) includes an air-passage layer including a plurality of air-passage microchannels, a working fluid layer including a plurality of working fluid microchannels, and a sealing layer coupled to the working fluid layer to provide a working/sealing layer set. The working/sealing layer set includes an arrangement of raised pedestals. The raised pedestals may extend from the working fluid layer to the sealing layer and contact the sealing layer.