138 results about "Turboexpander" patented technology

An air conditioning system is provided. The air conditioning system includes an air compressor, a battery, a generator, a blower, and a turboexpander. The air compressor generates pressurized air from ambient air. The battery is for powering the air compressor motor. The generator is electrically connected to the battery. The turboexpander includes a drive shaft, a turbine wheel coupled to the drive shaft, and an expander coupled to the drive shaft. The pressurized air provides a source of kinetic energy to directly cause the turbine wheel to rotate and generate boosted air from the pressurized air, and the boosted air from the turbine wheel is configured to be received in the expander wheel and directly cause the expander wheel and the drive shaft to rotate together with the turbine wheel, thereby generating expanded and cooled air in the expander wheel.

A propulsion system for an aircraft includes a core engine that includes a core flow path where air is compressed in a compressor section, communicated to a combustor section, mixed with a gaseous fuel and ignited to generate an exhaust gas flow that is expanded through a turbine section. A fuel system supplies a fuel to the combustor through a fuel flow path, a first heat exchanger thermally communicates a first heat load into a cooling flow, a turboexpander where a heated cooling flow from the first heat exchanger is expanded to generate shaft power and cooled to provide a cooled cooling flow, and a second heat exchanger thermally communicates a second heat load to the cooled cooling flow that is communicated from the turboexpander, cooling flow from the second heat exchanger is communicated to the combustor section.

An integrated hermetically sealed turboexpander-generator comprises a hermetically sealed casing arrangement, a turboexpander, a compressor and an electric generator, arranged in the hermetically sealed casing arrangement along a common shaft line, supported by active magnetic bearings. Also disclosed is a thermodynamic system using the integrated hermetically sealed turboexpander-generator to convert waste heat from a waste heat source into electric power. The electric generator is arranged at one end of the common shaft line.

A system is provided for an aircraft. This aircraft system includes an engine, a fuel system and an air system. The fuel system includes a fuel circuit, a fuel source, a heat exchanger and a turboexpander. The fuel circuit is configured to direct fuel from the fuel source, through the heat exchanger and the turboexpander, to the engine for combustion. The heat exchanger is configured to transfer heat energy from combustion products generated by the combustion of the fuel in the engine into the fuel in the fuel circuit. The air system is discrete from the engine. The air system includes an air compressor and the turboexpander. The air system is configured to expand the fuel directed across the turboexpander by the fuel circuit to power operation of the air compressor.

A system for processing a natural gas stream includes a flow-through turboexpander generator, a throttle valve, a knockout separator, and an absorption separator. The flow-through turboexpander generator is configured to receive a first portion of the natural gas stream and generate electrical power in response to expansion of the first portion of the natural gas stream. The throttle valve is configured to reduce a pressure of a second portion of the natural gas stream. The knockout separator is configured to receive the first portion of the natural gas stream from the flow-through turboexpander generator and configured to separate phases of the first portion of the natural gas stream to produce at least a gaseous phase and an aqueous phase. The absorption separator is configured to receive the gaseous phase from the separator vessel and separate water from the gaseous phase to produce a dehydrated natural gas stream.

An apparatus includes an electric generator that includes a fluid inlet configured to receive hydrogen at a first pressure, a turbine wheel configured to expand the hydrogen and rotate in response to expansion of the hydrogen flowing into an inlet of the turbine wheel and out of the outlet of the turbine wheel, a rotor coupled to the turbine wheel and configured to rotate with the turbine wheel, a stationary stator, the electric generator to generate an alternating current upon rotation of the rotor within the stator, and a fluid outlet configured to output hydrogen at a second pressure less than the first pressure. The apparatus includes a power electronics system electrically connected to an electrical output of the electric generator and to receive alternating current from the electric generator. The power electronics can condition the generated electrical current to supply power to various types of loads.

An air conditioning system includes a rotation driving device, an energy storage device for powering the rotation driving device, a generator electrically connected to the energy storage device, and a turboexpander. The turboexpander includes a drive shaft coupled to both the generator and the rotation driving device, and configured to be rotated by the rotation driving device. The turboexpander also includes a compressor wheel and an expander wheel. The compressor wheel is configured to pull in ambient air and generate pressurized air from the ambient air responsive to rotation of the drive shaft. The expander wheel is fluidly coupled to the compressor wheel such that the pressurized air from the compressor wheel is configured to be received in the expander wheel and converted into expanded and cooled air by the expander wheel for delivery to an environment.

A turboexpander with a turbine wheel coupled to drive a generator in response to a flow of incoming gas. A housing assembly of the turboexpander defines a sealed space, sealed from the incoming gas. The sealed space is in fluid communication with a surface of the turbine wheel such that pressure in the sealed space acts on the turbine wheel. A bypass passage communicates pressure between the sealed space and a space in communication with an outlet of the turbine wheel. The bypass passage includes an changeable flow area to control the communication of pressure between the sealed space and the outlet of the turbine wheel.

An energy storage system includes a pneumatic vessel, a cable system attached to the vessel, a compressor for pressurizing the vessel, a generator attached to the cable system, a turboexpander generator for receiving compressed air from the vessel, and a control system. The system deflates and allows the vessel to sink in a body of water, inflates the vessel to store energy when an abundance of it exists, and allows the inflated vessel to resurface to release its buoyant energy to the generator via the cable system and to release compressed air to the turboexpander generator to generate electricity when electricity demand is high and / or electricity generation from other sources is low.

A cryogenic expansion turbine system (10) includes a turbo-expander (12) configured to receive and expand a cryogenic gas feed stream (24). A rotary shaft (16) operatively connects the turbo-expander and a resistance device, such as a compressor (14) or brake. A bearing housing (18) has a bearing cooling fluid inlet port and a bearing cooling fluid outlet port. Electro-magnetic bearings (22) are positioned within the bearing housing and rotatably support the rotary shaft. A bearing cooling circuit (72) directs a stream of bearing cooling fluid (62) into the bearing housing via the bearing cooling fluid inlet port so that the electro-magnetic bearings are cooled and resulting warmed bearing cooling fluid (68) exits the bearing housing via the cooling fluid outlet port.

A system for supplying inert nitrogen gas into a large volume container such as a reactor. The system operates without auxiliary power sources for vaporizing and pressurizing the nitrogen gas. Components include a liquid nitrogen tank, first and second vaporizers, and a heat exchanger. The heat exchanger may include a coil which is coated with hydrophilic material and include spargers. The system is suited for refinery settings, where it can fit into operational environments and reduce carbon emissions. Optional features such as a turboexpander / generator can be incorporated for additional pressurization capabilities and a tempering heat exchanger that can be used to provide fine adjustments to temperature.

A cold energy recovery facility includes a liquid hydrogen tank configured to store liquid hydrogen a first circuit configured to circulate a first working medium, a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium, a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state, a second turboexpander provided in the second circuit, the second turboexpander being configured to be driven by the second working medium in a gas state, a first heat exchanger configured to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium, a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium, and a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a heat medium, wherein the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger, and the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low-temperature heat source in the second heat exchanger.

The invention relates to the technical field of carbon dioxide recycling, in particular to a system and a method for comprehensively utilizing residual pressure of carbon dioxide, which comprises a carbon dioxide emission main path communicated with a low-temperature methanol washing synthesis ammonia system, and the carbon dioxide emission main path is communicated with a residual heat utilization unit, a residual pressure power generation unit and a tail gas emission unit. The waste heat utilization unit comprises a carbon dioxide heat exchanger, a flash tank, a medium heat exchanger and a liquid storage tank which are sequentially connected in series, the residual pressure power generation unit comprises a turbo expander, a speed reducer and a power generator, and the tail gas emission device comprises a tail gas washing tower and an exhaust chimney. The system and method for comprehensively utilizing the residual pressure of the carbon dioxide are simple in structure, safe, reliable and convenient to use, and recycling of resources is achieved.

The invention belongs to the technical field of liquid hydrogen storage, and particularly discloses a liquid hydrogen boil-off gas constant-pressure recovery method and equipment, and the equipment comprises a liquid hydrogen storage box, a first compressor, a first-stage liquid nitrogen heat exchanger, a second-stage liquid nitrogen heat exchanger, a third-stage liquid nitrogen heat exchanger, a second compressor, a turbo expander and a cooler which are sequentially connected end to end; a liquid hydrogen evaporation outlet and a liquid hydrogen inlet are formed in the liquid hydrogen storage box, and the liquid hydrogen evaporation outlet is connected with an inlet of the first compressor; a throttle valve is arranged between the liquid hydrogen inlet and the outlet of the cooler; liquid hydrogen evaporated gas enters a first compressor to be compressed and then enters a first-stage liquid nitrogen heat exchanger, a second-stage liquid nitrogen heat exchanger and a third-stage liquid nitrogen heat exchanger to be pre-cooled step by step in sequence; the precooled hydrogen enters the second compressor, the turbo expander and the cooler to be cooled step by step and then enters the throttling valve, and the throttling valve enables the cooled hydrogen to be liquefied through the expansion effect. The pressure of the recovery equipment can be kept stable under different working conditions, and gas waste is avoided.

An energy storage system includes a pneumatic vessel, a cable system attached to the vessel, a compressor for pressurizing the vessel, a generator attached to the cable system, a turboexpander generator for receiving compressed air from the vessel, and a control system. The system deflates and allows the vessel to sink in a body of water, inflates the vessel to store energy when an abundance of it exists, and allows the inflated vessel to resurface to release its buoyant energy to the generator via the cable system and to release compressed air to the turboexpander generator to generate electricity when electricity demand is high and / or electricity generation from other sources is low.

A turbocharger for an internal combustion engine or fuel cell includes a compressor having a liquid-cooled backplate through which a liquid coolant is circulated. The backplate reduces compressor outlet temperature, thereby reducing the cooling load on the intercooler for the engine, and enabling a reduction in charge air temperature entering the engine air inlet manifold. The compressor can include a serial two-stage compressor, in which case the backplate serves as a divider between the two impellers. In another variation, a turboexpander is combined on the same shaft with a single-stage compressor having the liquid-cooled backplate. Pressurized air from the compressor drives the turbine wheel of the turboexpander, expanding and reducing the temperature of the air before being fed to the engine.

The invention relates to the technical field of impeller machinery, in particular to a turbo expander noise reduction supporting plate structure which comprises a supporting plate body, a tooth-shaped tail edge and sound absorption holes, the tooth-shaped tail edge is arranged on one side of the supporting plate body, the two ends of the supporting plate body are connected with the inner wall of an exhaust pipe and a flow guide cone respectively, and the supporting plate body is arranged close to an air inlet. The tooth-shaped tail edge is arranged close to the exhaust port; sound absorption holes are formed in the side face of the supporting plate body. Noise generated by an upstream turbine blade grid is absorbed through the sound absorption holes, an efficient through-flow structure is formed through the tooth-shaped tail edge, poor flow structures such as flow separation, falling vortex and wake loss are changed, and the aerodynamic noise of the turbine blade grid is restrained.

An aircraft propulsion system includes a cryogenic fuel system and a fuel flow path where a fuel flow is circulated from upstream in a direction downstream to a combustor of the core engine. A first heat exchanger inputs heat into the fuel flow downstream of the first heat exchanger is used to heat the fuel flow from the fuel storage tank and a second heat exchanger inputs thermal energy from a heat source into the fuel flow from the core engine downstream of the first heat exchanger. A turboexpander is configured to generate shaft power from expansion of the fuel flow exhausted downstream from at least one of the first heat exchanger and the second heat exchanger.

The invention relates to the technical field of low-temperature turbo-expanders, in particular to a low-temperature turbo-expander main machine and a complete machine system, and the low-temperature turbo-expander main machine is designed around a main shaft. The main shaft sequentially penetrates through and integrates the impeller assembly, the braking assembly, the lubricating assembly and the sealing assembly which are located at the two ends, and the braking assembly is matched with an external braking sleeve through bidirectional braking oil grooves formed in a braking section of the main shaft and opposite in rotating direction to form a hydraulic braking system. The lubricating assembly comprises a thrust bearing structure comprising a plurality of tilting pads and thrust tiles, and an oil retainer is integrated to form a closed lubricating cavity. According to the sealing assembly, a multi-stage sealing structure at least comprising two sealing sections is adopted at the two ends of the main shaft, and sealing gas is introduced into a sealing groove to effectively block leakage of an internal working medium. A nozzle part in the impeller assembly synchronously drives a plurality of rotatable blades through a linkage ring, and the end gaps of the blades are dynamically controlled through a pressing ring mechanism capable of axially moving.

The utility model relates to the technical field of turbo expanders, in particular to a turbo expander capable of reducing air inlet temperature, which enables a first heat exchange box to be more convenient to disassemble and assemble, when maintenance is needed, the first heat exchange box is convenient to disassemble and assemble, the maintenance efficiency is effectively improved, and the practicability is improved. Comprising an air inlet and a first heat exchange box, a right connecting table communicates with the input end of the air inlet and is fixedly arranged on the air inlet, a butt joint groove is formed in the left end of the right connecting table, the right end of the first heat exchange box fixedly communicates with a left connecting table, and a butt joint table is fixedly arranged at the right end of the left connecting table; the upper buckling cover and the lower buckling cover are provided with arc-shaped sealing grooves, the right connecting table and the left connecting table are sleeved with the upper buckling cover and the lower buckling cover through matching of the arc-shaped sealing grooves, fixing bolts are inserted into the two sets of lug plates through matching of bolt holes, the fixing bolts are sleeved with lock nuts in a screwed mode, and the bottom ends of the lock nuts make close contact with the top ends of the lug plates on the upper buckling cover.

The application discloses an axial force balancing mechanism and a turbo expander. The axial force balancing mechanism is used for balancing the axial force of a turbo expander. The axial force balancing mechanism comprises a casing, a main shaft rotatably connected with the casing, the main shaft having an expansion end and a pressurization end, the expansion end being provided with a working wheel, and the pressurization end being provided with a pressurization wheel; a shaft sleeve fixed to the main shaft, the inner shaft sleeve being provided with a shaft sleeve sawtooth; and a sealing device connected with the casing and corresponding to the inner shaft sleeve, the sealing device being provided with a sealing sawtooth; wherein the tooth shapes of the shaft sleeve sawtooth and the sealing sawtooth are staggered. The axial force balancing mechanism and the turbo expander can realize the balance adjustment of the axial force of the expander.

The application discloses a fuel cell air supply system based on a compression-expansion integrated machine and a control method. The system comprises a compressor, an air inlet of the compressor being used for connecting air; an air cooler, an air inlet of the air cooler being connected with an air outlet of the compressor, and an air outlet of the air cooler being connected with an air inlet of a fuel cell stack; and a turbo-expander, an air inlet of the turbo-expander being connected with an air outlet of the fuel cell stack. The compressor and the turbo-expander are coaxially and oppositely arranged, and are connected through a motor. A discharge valve is arranged on a connecting pipeline between the air outlet of the fuel cell stack and the air inlet of the turbo-expander, and the discharge valve can discharge exhaust gas discharged through the air outlet of the fuel cell stack. The application can guarantee the stability of the air supply system under low working conditions, and improve the variable working condition adaptability of the fuel cell air supply system based on the compression-expansion integrated machine.

The invention relates to the technical field of industrial refrigeration, and discloses a fermentation heat-expansion work self-circulation refrigeration system which comprises a refrigerant circulation loop used for bearing carbon dioxide serving as a refrigerant to circularly flow in the refrigerant circulation loop, the refrigerant circulation loop is sequentially provided with an evaporator, a compressor, a condenser and an expansion machine with a power output shaft in series; and the chilled water circulation loop comprises a heat exchange component arranged in the fermentation tank, a circulating water pump and a connecting pipeline, and the chilled water circulation loop exchanges heat with the refrigerant circulation loop through the evaporator and is used for transferring fermentation heat generated in the fermentation tank to the carbon dioxide refrigerant. The radial centripetal turbine expansion machine is arranged to replace a traditional throttling valve, and is matched with work recovery and coupling mechanisms such as the planetary gear reduction box and the electromagnetic clutch, high-pressure potential energy released by supercritical carbon dioxide in the expansion process is converted into mechanical work, and the mechanical work is directly used for driving the compressor to run.

An air separation system using a membrane separation unit to produce a nitrogen-enriched product stream from a feed air stream is described herein. A nitrogen-enriched non-permeate stream is expanded in a turboexpander and the energy recovered during expansion is used to further compress the feed air stream prior to membrane separation. Expanded nitrogen-enriched non-permeate stream is also used to cool the compressed feed air upstream from membrane separation.

The present invention discloses a system for generating water recycling and humidification, which has the following circulation paths: Cooling water circuit circulation: The fuel cell stack flows through a temperature sensor and a pressure sensor and enters the coolant water pump, then flows into the evaporator, passes through the evaporator and enters the radiator, and then reaches the flow control valve and is divided into two paths. One path flows through the pressure sensor and the temperature sensor and enters the fuel cell stack, and the other path enters the intercooler and then converges to the cooling pipeline at the outlet of the fuel cell stack. Air circuit circulation: Air flows through the air filter and the mass flow meter and enters the condenser, then enters the turboexpander. The pressurized dry air flows through the temperature sensor and reaches the mixing chamber, where it is mixed with the water vapor generated by the evaporator and then flows through the humidity sensor, the pressure sensor and the temperature sensor and enters the fuel cell stack. The condenser receives the generated products of the fuel cell stack, then the condensed water enters the water pump, and the other gas products enter the turboexpander and then flow through the exhaust mixing chamber and are discharged.

The system is characterized by comprising a cold box, a gas-liquid separator, a heat regenerator and a turbine generator set, the cold box is provided with three outlets, one outlet of the cold box is connected with the gas-liquid separator through a pipeline, the gas-liquid separator is provided with two outlets, one outlet of the gas-liquid separator is connected with the cold box through a pipeline, and the other outlet of the gas-liquid separator is connected with the turbine generator set through a pipeline. A second outlet of the cold box is connected with a heat regenerator through a pipeline, the heat regenerator is connected with a turbine generator set through a pipeline, and the turbine generator set is connected with the cold box through a pipeline; on one hand, toluene is condensed and recovered, consumption of water vapor and electric energy is reduced, discharge of waste water is reduced, and the purposes of reducing production cost, saving energy and reducing emission are achieved. Meanwhile, the methylbenzene oxidation pressurized tail gas is used for expanding to do work to generate power, energy contained in tail gas emission is converted into electric energy, and economic benefits are created for enterprises.

An aircraft propulsion system includes a core engine that includes a combustor where a cryogenic fuel is mixed with compressed air and ignited to generate an exhaust gas flow, a propulsive fan driven by shaft power that is generated by the core engine, a cryogenic fuel system that includes a cryogenic fuel storage tank, a fuel flow path where a fuel flow is circulated from upstream in a direction downstream toward the combustor of the core engine, a bottoming compressor where a gaseous fuel flow is compressed, a first heat exchanger where the gaseous fuel flow exhausted from the bottoming compressor is heated, a turboexpander where the gaseous fuel flow from the first heat exchanger is expanded to generate shaft power, and a mixer where the gaseous fuel flow mixes with and heats a liquid fuel flow to generate a gaseous fuel flow for communication to the bottoming compressor.

A waste heat recovery system for recovering rejected heat of an internal combustion engine is provided, the waste heat recovery system including a turboexpander. The turboexpander outputs power based on a working fluid and includes turbine blades rotatable by the working fluid, a shaft coupled to and rotatable by the turbine blades and extending along a longitudinal axis, and a nozzle assembly for directing the working fluid to the turbine blades for rotation of the turbine blades. The nozzle assembly includes a nozzle housing disposed about the shaft and adjacent the turbine blades, and a nozzle for accelerating the working fluid. The nozzle member defines a nozzle throat having a geometry. The waste heat recovery system further includes a passive control coupled to the nozzle member for directing the working fluid.