A waste heat recovery system for recovering waste heat of in internal combustion engine includes a turbine expander. The turbine expander includes a turbine blade, a shaft coupled to and rotatable by the turbine blade, and a nozzle assembly. The nozzle assembly includes a nozzle block disposed about the shaft and adjacent the turbine blade, a first nozzle component coupled to the nozzle block, and a second nozzle component coupled to the nozzle block. The first nozzle component defines a first nozzle having a first geometrical configuration. The second nozzle component defines a second nozzle having a second geometrical configuration that is different from the first geometrical configuration. The waste heat recovery system also includes a flow control device in fluid communication with the turbine expander. The waste heat recovery system further includes a controller in communication with the flow control device.

A hybrid propulsion system for driving an air mover about a rotation axis, has: a heat engine driving a heat engine shaft; an electric motor driving a motor shaft, the heat engine and the electric motor being axially offset from one another relative to the rotation axis; a gearbox having at least one input in driving engagement with the heat engine shaft and the motor shaft, and an output drivingly engageable to the air mover; and a disconnect mechanism disposed between one of the heat engine and the electric motor and the gearbox, the disconnect mechanism having an engaged configuration in which the one of the heat engine and the electric motor is drivingly engaged to the gearbox through the disconnect mechanism and a disengaged configuration in which the disconnect mechanism disengages the one of the heat engine and the electric motor from the gearbox.

A hybrid propulsion system for driving an air mover about a rotation axis, has: a heat engine driving a heat engine shaft; an electric motor driving a motor shaft, the heat engine and the electric motor being axially offset from one another relative to the rotation axis; a gearbox having at least one input in driving engagement with the heat engine shaft and the motor shaft, and an output drivingly engageable to the air mover; and a disconnect mechanism disposed between one of the heat engine and the electric motor and the gearbox, the disconnect mechanism having an engaged configuration in which the one of the heat engine and the electric motor is drivingly engaged to the gearbox through the disconnect mechanism and a disengaged configuration in which the disconnect mechanism disengages the one of the heat engine and the electric motor from the gearbox.

A bottoming cycle power system includes a turbo-expander operable to rotate a turbo-crankshaft as a flow of exhaust gas from a combustion process passes through the turbo-expander. A turbo-compressor is operable to compress the flow of exhaust gas after the exhaust gas passes through the turbo-expander. An open cycle absorption chiller system includes an absorber section operable to receive the flow of exhaust gas from the turbo-expander and to mix the flow of exhaust gas with a first refrigerant solution within the absorber section. The first refrigerant solution is operable to absorb water from the exhaust gas as the exhaust gas passes through the first refrigerant solution. The absorber section is operable to route the flow of exhaust gas to the turbo-compressor after the flow of exhaust gas has passed through the first refrigerant solution.

A bottoming cycle power system includes a turbo-expander operable to rotate a turbo-crankshaft as a flow of exhaust gas from a combustion process passes through the turbo-expander. A turbo-compressor is operable to compress the flow of exhaust gas after the exhaust gas passes through the turbo-expander. An open cycle absorption chiller system includes an absorber section operable to receive the flow of exhaust gas from the turbo-expander and to mix the flow of exhaust gas with a first refrigerant solution within the absorber section. The first refrigerant solution is operable to absorb water from the exhaust gas as the exhaust gas passes through the first refrigerant solution. The absorber section is operable to route the flow of exhaust gas to the turbo-compressor after the flow of exhaust gas has passed through the first refrigerant solution.

An aircraft power system comprises a turbocharger, the turbocharger including a compressor for supplying combustion air to an internal combustion engine, a turbine operatively connected to an internal combustion engine to receive an exhaust flow from the internal combustion engine and convert energy of the exhaust flow into rotational power and, a turbo shaft operatively connecting the turbine to the compressor to transfer at least some of the rotational power to the compressor. A generator is operatively connected to the turbo shaft to receive at least some of the rotational power from the turbo shaft for generating electrical power. At least one electrically powered air-mover is electrically connected to the generator to receive at least some of the electrical power to produce thrust.

An exhaust-gas turbocharger for a motor vehicle includes a compressor, a first and a second axial turbine, an electrical generator and an electric motor. The axial turbines are configured to drive the generator. The generator is configured to provide a feed to the electric motor. The electric motor is configured to drive the compressor.

A method for maximising the total power output of a power generation system is described the method comprising providing a power generation system comprising a turbocharged prime mover and a turbogenerator system driven by a flow of exhaust fluid from the prime mover, the turbogenerator system creating a backpressure on the turbocharged prime mover, comparing a parameter of the power generation system to a threshold value of the parameter, and adjusting the turbogenerator system to vary the backpressure on the turbocharged prime mover to change the parameter to become closer to the threshold value and increase the total power output or fuel efficiency of the power generation system. An apparatus for performing the method is also described.

A waste heat recovery system for recovering waste heat of in internal combustion engine includes a turbine expander. The turbine expander includes a turbine blade, a shaft coupled to and rotatable by the turbine blade, and a nozzle assembly. The nozzle assembly includes a nozzle block disposed about the shaft and adjacent the turbine blade, a first nozzle component coupled to the nozzle block, and a second nozzle component coupled to the nozzle block. The first nozzle component defines a first nozzle having a first geometrical configuration. The second nozzle component defines a second nozzle having a second geometrical configuration that is different from the first geometrical configuration. The waste heat recovery system also includes a flow control device in fluid communication with the turbine expander. The waste heat recovery system further includes a controller in communication with the flow control device.

A waste heat recovery system for recovering waste heat of in internal combustion engine includes a turbine expander. The turbine expander includes a turbine blade, a shaft coupled to and rotatable by the turbine blade, and a nozzle assembly. The nozzle assembly includes a nozzle block disposed about the shaft and adjacent the turbine blade, a first nozzle component coupled to the nozzle block, and a second nozzle component coupled to the nozzle block. The first nozzle component defines a first nozzle having a first geometrical configuration. The second nozzle component defines a second nozzle having a second geometrical configuration that is different from the first geometrical configuration. The waste heat recovery system also includes a flow control device in fluid communication with the turbine expander. The waste heat recovery system further includes a controller in communication with the flow control device.