An airplane is provided. The airplane includes a compressing device including a turbine and a compressor. The turbine includes first and second inlets and provides energy by expanding one or more mediums. The first inlet is receives a first medium of the one or more mediums. The second inlet receives a second medium of the one or more mediums. The compressor receives a first energy derived from the first and second mediums being expanded across the turbine during a first mode of the compressing device, receives a second energy derived from the first medium being expanded across the turbine during a second mode of the compressing device, and compresses the second medium in accordance with the first mode or the second mode.

An air cycle machine is provided. The air cycle machine can be included an environmental control system of an aircraft. The air cycle machine can include a turbine comprising a plurality of inlet gas flow paths, a compressor driven by the turbine from a shaft, and a fan driven by the turbine from the shaft.

A dual-use air turbine system for a gas turbine engine of an aircraft is provided. The dual-use air turbine system includes a variable area air turbine mechanically linked to a spool of the gas turbine engine through a multi-speed gear set. The dual-use air turbine system also includes a plurality of valves in pneumatic ducting operable to direct an engine start air flow through an inlet of the variable area air turbine and drive rotation of the spool during an engine start mode of operation. The valves are further operable to direct an engine bleed air flow from a compressor section of the gas turbine engine through the inlet of the variable area air turbine and drive rotation of the spool during an environmental control system active mode of operation.

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 gas emission source, 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 gas emission source through the first set of conduits.

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 gas emission source, 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 gas emission source through the first set of conduits.

A system and method is provided for converting wellhead pressure of natural gas wells, or for converting water head pressure of water towers, to rotational power for operating rotated equipment, such as electrical generators, electrical alternators, pumps, air compressors, and other rotated equipment.

A system and method is provided for converting wellhead pressure of natural gas wells, or for converting water head pressure of water towers, to rotational power for operating rotated equipment, such as electrical generators, electrical alternators, pumps, air compressors, and other rotated equipment.

A system and method for storing nitrogen-enriched air (NEA) comprising an air separation device (ASM) and producing NEA in the ASM. One example implementation may include bleed air being supplied to a pressure intensifier. The pressure intensifier is powered by NEA compressed by a first compressor, and the pressure of the bleed air is increased by the pressure intensifier and supplied to an ASM. In another example implementation, a turbine may be drivingly connected to a second compressor and the bleed air supplied to the second compressor. The NEA compressed by the first compressor is supplied to and drives the turbine, which drives the second compressor, and the air compressed by the second compressor is supplied to the ASM. In another example implementation, a turbine may drive an electric generator, which in turn may power an electric motor that drives the second compressor.

A system and method for storing nitrogen-enriched air (NEA) comprising an air separation device (ASM) and producing NEA in the ASM. One example implementation may include bleed air being supplied to a pressure intensifier. The pressure intensifier is powered by NEA compressed by a first compressor, and the pressure of the bleed air is increased by the pressure intensifier and supplied to an ASM. In another example implementation, a turbine may be drivingly connected to a second compressor and the bleed air supplied to the second compressor. The NEA compressed by the first compressor is supplied to and drives the turbine, which drives the second compressor, and the air compressed by the second compressor is supplied to the ASM. In another example implementation, a turbine may drive an electric generator, which in turn may power an electric motor that drives the second compressor.

An energy recapturing apparatus is disclosed. The energy recapturing apparatus is housed within a frame that is configured to fit within a preexisting fluid passageway. The frame is further attached to a sliding mechanism, which enables the frame to be easily removed from the preexisting fluid passageway. Further, the frame is configured to accept at least one turbine that contains a plurality of blades. The turbine is able to convert the energy of fluid movement into electricity.