195results about "Compression machines using turbines" patented technology

A refrigeration circuit comprising one first compressor (1), a first gas-cooler (7), connected to the first compressor through a common discharge line (41), a medium temperature expansion valve (19), a medium temperature heat exchanger (20), a liquid receiver (17) that is connected to an outlet liquid line (80) that splits in a first liquid line (81) that connects with the medium temperature heat exchanger and a second liquid line (82) that comprises a first expansion valve (28), to a first pressure reduction valve (14) and to a first heat exchanger (18), wherein the refrigerant flowing through the second liquid line is also mixed with the refrigerant from the first liquid line leaving the medium temperature heat exchanger and the mixture enters the first heat exchanger to exchange heat with the refrigerant in the first liquid line to be directed to the first compressor through a suction line (59).

A refrigeration cycle is connected to a supercritical carbon dioxide (sCO2) power cycle by incorporating a CO2 condenser which is also the refrigeration cycle evaporator. The heat rejected by the carbon dioxide is absorbed by the refrigerant in the CO2 condenser. Work is done on the refrigerant to raise its temperature above the local ambient temperature. The heat absorbed from the power cycle and the work required to raise the refrigerant temperature is rejected to the ambient environment, which may be either air, earth, or water. This results in improved efficiencies in carbon dioxide power cycles without regard to the ambient temperature by forcing a transcritical phase change even when ambient temperatures are above the carbon dioxide critical point. A two-phase heat transfer on both sides of the CO2 condenser further improves efficiency of the sCO2 power cycle.

A method of operating a refrigeration system is disclosed. The method comprises cooling a refrigerant using a first high side heat exchanger and reducing a pressure of a first portion of the refrigerant received from the first high side heat exchanger using a first expansion valve. The method comprises separating the refrigerant received from the first expansion valve into a liquid refrigerant and a vapor refrigerant using a receiver tank. The method comprises cooling a first space with the liquid refrigerant received from the receiver tank using a first low side heat exchanger, and recycling the refrigerant exiting the first low side heat exchanger to the receiver tank.

To provide an electric turbomachine for a freezer that comprises a heat insulating mechanism for suppressing heat input from a motor to a refrigerant flowing in a refrigerant flow path of a turbine, and has a high degree of freedom in designing a structure for fixing a stationary vane.SOLUTION: An electric turbomachine for a freezer comprises a motor and a turbine connected to the motor via a rotational shaft. The turbine includes a stationary vane provided upstream of a turbine wheel in a refrigerant flow path. A casing includes a partition part configured to partition the motor and the refrigerant flow path of the turbine. The partition part is provided with a heat insulating mechanism, and the stationary vane is fixed to a shroud-side flow path wall part.SELECTED DRAWING: Figure 2

A system includes a pressure exchanger (PX). The PX is coupled to a motor that controls an operating speed of the PX. The system further includes a condenser. An outlet of the condenser is fluidly coupled to a first inlet of the PX. The system further includes a pressure gauge. The pressure gauge is configured to provide first pressure data. The first pressure data is indicative of a pressure of a fluid of the condenser. The system further includes a first controller configured to cause the motor to adjust the operating speed of the PX. The first controller causes the motor to adjust the operating speed of the PX based on the first pressure data.

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 dual-mixed refrigerant precooling process for high capacity hydrogen liquefaction plants in which two mixed refrigerants are used to perform the precooling process. Each mixed refrigerant is circulated in a separate loop such that the first mixed refrigerant provides the cold duty of the first head exchange and the second heat exchanger, while the second refrigerant mixture provides the cold duty of a third heat exchanger and a fourth heat exchanger.

The cryogenic expansion turbine system (10) includes a turboexpander (12) configured to receive and expand a cryogenic gas supply stream (24). A rotating shaft (16) operatively connects the turboexpander to a compressor (14) or a resistance device, such as a braking device. A bearing housing (18) has a bearing cooling fluid inlet port and a bearing cooling fluid outlet port. Electromagnetic bearings (22) are disposed within the bearing housing and rotatably support the rotating shaft. A bearing cooling circuit (72) directs a flow of bearing cooling fluid (62) through the bearing cooling fluid inlet port and into the bearing housing, thereby cooling the electromagnetic bearings, and the resulting warmed bearing cooling fluid (68) exits the bearing housing through the cooling fluid outlet port.

A refrigeration system includes: a turbo machine including: a rotating shaft; a compressor impeller, a turbine wheel, and an electric motor attached to the rotating shaft; and a casing accommodating the rotating shaft, the compressor impeller, the turbine wheel, and the electric motor; a compressed fluid line for guiding a fluid compressed by the compressor impeller to the turbine wheel; a cooler provided in the compressed fluid line to perform heat exchange between the fluid flowing through the compressed fluid line and a cooling liquid; a cooling liquid circulation line provided with a cooling device for cooling the cooling liquid; and a cooling liquid introduction line for extracting the cooling liquid from the cooling liquid circulation line and introducing the cooling liquid into the casing.

A heat pump apparatus 10 comprises a first heat exchanger 100, a second heat exchanger 200, a compressor 300 and a turbine 400 (e.g. as a turbocharger) that each define a portion of a first fluid flow path. The first heat exchanger, second heat exchanger, compressor and turbine are mounted adjacent to one another such that a first region 102 of the first heat exchanger faces, and is adjacent to, a first region (202, figure 3) of the second heat exchanger. The compressor and turbine are located adjacent the first region of the first heat exchanger and a second region 204 of the second heat exchanger which extends in a direction away from the first region of the first heat exchanger. A first working fluid, such as air, is passed along the first fluid flow path and compressed by the compressor to heat it before exchanging heat with a second working fluid (e.g. water) in the second heat exchanger. The apparatus is compact in form, e.g. small enough to fit within a housing having dimensions equivalent to a domestic washing machine.

The invention relates to a heat pump circuit (1) for providing usable heat at a temperature above 130°C. The invention further relates to a method for operating such a heat pump circuit (1).

A system includes a pressure exchanger (PX) configured to receive a first fluid at a first pressure, receive a second fluid at a second pressure, and exchange pressure between the first fluid and the second fluid. The first fluid is to exit the PX at a third pressure and the second fluid is to exit the PX at a fourth pressure. The system further includes a first heat exchanger configured to provide the first fluid to the PX and provide corresponding thermal energy from the first fluid to a third fluid. The system further includes a turbine configured to receive the third fluid output from the first heat exchanger. The turbine is further configured to convert corresponding thermal energy of the third fluid into kinetic energy.

The utility model discloses a magnetic suspension centrifugal cooling-water machine which comprises a machine body, the outer wall of the machine body is fixedly connected with a vertical plate in a sleeved mode, the bottom of the vertical plate is fixedly connected with the top of a circular bottom plate, the circular bottom plate is rotationally connected with a base, and moving wheels are fixedly connected to the four corners of the bottom of the base. Inclined rods are fixedly connected to the two sides of the machine body, annular blocks fixedly sleeve the outer walls of rod bodies of the inclined rods, and the inclined rods and the annular blocks move in annular sliding grooves reserved in the base; and a limiting assembly. The hand wheel is rotated to drive the long rod to rotate, the long rod is in threaded connection with the base, in the rotating process of the long rod, the long rod moves, then the ends of the long rod move out of the limiting clamping groove reserved in the round bottom plate, and therefore the round bottom plate can be rotated subsequently to finely adjust the angle of the whole machine body conveniently; therefore, the whole magnetic suspension centrifugal cooling-water machine can be better installed and used.

The present invention relates to a refrigeration circuit (100), comprising: - at least one compressor device (110) which is designed to circulate a refrigerant in the refrigeration circuit (100); - at least one generator (120) for electrical energy, which is arranged downstream of the compressor device (110) in the refrigeration circuit (100) and is designed to be driven, in order to generate electrical energy, by the refrigerant compressed by the at least one compressor device (110); - at least one first expansion valve (130) which is arranged downstream of the at least one generator (120) in the refrigeration circuit (100) in order to expand the refrigerant after it flows through the at least one generator (120); and - at least one evaporator (140) which is arranged downstream of the at least one first expansion valve (130) in the refrigeration circuit (100) in order to evaporate the refrigerant after it flows through the at least one first expansion valve (130).

Disclosed herein is a leakage detection system of a reliquefaction system for ships. The leakage detection system includes: a gas supply line along which boil-off gas generated from a liquefied gas stored in a storage tank of a ship is supplied to a compressor; a reliquefaction line along which the boil-off gas compressed by the compressor is cooled and reliquefied through a heat exchanger and is returned to the storage tank; a refrigerant circulation line along which a refrigerant exchanging heat with the compressed boil-off gas in the heat exchanger is circulated; a refrigerant compressor disposed on the refrigerant circulation line to compress the refrigerant discharged from the heat exchanger after cooling the compressed boil-off gas; a refrigerant expander expanding and cooling the refrigerant compressed by the refrigerant compressor and having been cooled through the heat exchanger and supplying the cooled refrigerant back to the heat exchanger; and a refrigerant charge line connecting an inventory tank filled with nitrogen to an upstream side of the refrigerant compressor on the refrigerant circulation line, wherein, upon initial start-up or restart of a reliquefaction process, the nitrogen is supplied to the upstream side of the refrigerant compressor via the refrigerant charge line to detect leaks in the refrigerant circulation line.

A heat pump apparatus (10) comprises a first heat exchanger unit (100), a second heat exchanger unit (200), a compressor module (300) and a turbine module (400) which each define a portion of a first working fluid flow path (900). The first heat exchanger unit (100), the second heat exchanger unit (200), the compressor module (300) and the turbine module (400) are mounted adjacent to one another such that a first region (102) of the first heat exchanger unit (100) faces, and is adjacent to, a first region (202) of the second heat exchanger unit (200). The compressor module (300) and the turbine module (400) are located adjacent the first region (102) of the first heat exchanger unit (100) and a second region (204) of the second heat exchanger unit (200) which extends in a direction away from the first region (102) of the first heat exchanger unit (100).

A gas system in which gas compressed by a compressor is expanded by a turbine, the gas system being capable of safely stopping in the event of a power outage, and a control method thereof are provided. [Solution] The gas system 100 includes a compressor 1 that produces compressed gas by rotating a compression rotor 10, a first rotating electric motor 11 that rotates the compression rotor 10 and rotates together with the compression rotor, a first inverter 3 that exchanges electric power with the first rotating electric motor 11 and controls the rotation speed of the first rotating electric motor 11, an expansion turbine 2 that expands the compressed gas to rotate a turbine rotor 20, a second rotating electric motor 21 that rotates together with the turbine rotor 20, a second inverter 4 that exchanges electric power with the second rotating electric motor 21 and controls the rotation speed of the second rotating electric machine 21, and a power line 93 that supplies driving power from the first inverter 3 to the second inverter 4.

The application relates to a binary cycle power system (100) for generating electrical power. The system comprises a heat exchanger (116) for evaporating a first fluid (106), a turbine converter (120), an electrical generator (122), and a first condenser (124) for condensing the evaporated first fluid. The turbine converter converts energy of the evaporated first fluid to mechanical energy and the electrical generator generates the electrical power from the mechanical energy. The heat exchanger is a second condenser (116), which is a part of a heat pump (110) that transfers heat from a second fluid (108) circulating in the heat pump to the first fluid so that the first fluid evaporates.

To provide a method and an apparatus for cooling a surface on a flight vehicle and / or generating power.SOLUTION: Supercritical working fluid is circulated through a fluid loop that includes the steps of: compressing the supercritical working fluid by a compressor, heating the supercritical working fluid by a heat absorbing portion that is thermally coupled to a surface; expanding the supercritical working fluid in a thermal engine to generate work output; cooling the supercritical working fluid; and recirculating the supercritical working fluid to the compressor. The work output of the thermal engine is operably coupled to the compressor, and may optionally be coupled to a generator in order to generate power. The supercritical working fluid absorbs heat from the surface, eliminates hot spots and permits use of lighter and / or less expensive material.SELECTED DRAWING: None

A method of operating a refrigeration system is disclosed. The method comprises cooling a refrigerant using a first high side heat exchanger, and reducing the pressure of a first portion of the refrigerant received from the first high side heat exchanger using a first expansion valve in a first low side heat exchanger unit. The method further comprises cooling a first space with the refrigerant received from the first expansion valve using a first low side heat exchanger in the first low side heat exchanger unit, and reducing the pressure of a second portion of the refrigerant received from the high side heat exchange using an expander of an expansion-compression unit. The method further comprises compressing the refrigerant received from the first low side heat exchanger using a compressor of the expansion-compression unit.

A refrigeration system includes: a turbo machine including: a rotating shaft; a compressor impeller, a turbine wheel, and an electric motor attached to the rotating shaft; and a casing accommodating the rotating shaft, the compressor impeller, the turbine wheel, and the electric motor; a compressed fluid line for guiding a fluid compressed by the compressor impeller to the turbine wheel; a cooler provided in the compressed fluid line to perform heat exchange between the fluid flowing through the compressed fluid line and a cooling liquid; a cooling liquid circulation line provided with a cooling device for cooling the cooling liquid; and a cooling liquid introduction line for extracting the cooling liquid from the cooling liquid circulation line and introducing the cooling liquid into the casing.

A refrigeration cycle is connected to a supercritical carbon dioxide (sCO2) power cycle by incorporating a CO2 condenser which is also the refrigeration cycle evaporator. The heat rejected by the carbon dioxide is absorbed by the refrigerant in the CO2 condenser. Work is done on the refrigerant to raise its temperature above the local ambient temperature. The heat absorbed from the power cycle and the work required to raise the refrigerant temperature is rejected to the ambient environment, which may be either air, earth, or water. This results in improved efficiencies in carbon dioxide power cycles without regard to the ambient temperature by forcing a transcritical phase change even when ambient temperatures are above the carbon dioxide critical point. A two-phase heat transfer on both sides of the CO2 condenser further improves efficiency of the sCO2 power cycle.

The invention relates to a refrigeration device, comprising a circuit for a working fluid, comprising means (3) for compressing the working fluid having at least one compressor, means (4, 5) for cooling the working fluid, the invention relates to a device for heating a working fluid, comprising a heat exchanger (7), a means (6) for expanding the working fluid having at least one expansion turbine (6), and a means (7) for heating the working fluid, the device comprising an insulated cold box (9) housing the heat exchanger (7) and the at least one turbine (6), the cold box (9) having a cylindrical shape extending in a longitudinal direction around a central axis (10), the at least one turbine (6) is arranged in the cold box (9) in a laterally offset manner with respect to its central longitudinal axis (10).

The invention relates to a cooling circuit for a gas-fed cooling system in a floating structure with a tank, the cooling circuit comprising a main loop through which a coolant flows, the main loop comprising: a compression device, a heat exchanger, an internal heat exchanger, and a turbo compressor (13), the cooling circuit comprising a regulating branch connected to the main loop, the regulating branch comprising a valve configured to control the flow of coolant in the regulating branch, the main loop comprising a pressure sensor, the valve controlling the amount of coolant present in the main loop based on the pressure measured by the pressure sensor.

A method is provided. The method comprises: identifying, by a processing device, first temperature data indicative of a temperature difference between a bulk fluid at a first inlet of a heat exchanger and the bulk fluid at a first outlet of the heat exchanger, fluidly coupled to the first inlet by one or more fluid channels of the heat exchanger, wherein the first outlet of the heat exchanger is fluidly coupled to a high-pressure inlet of a pressure exchanger (PX); determining, based on the first temperature data, a target adjustment of a first valve fluidly coupled to the first outlet of the heat exchanger and to a secondary fluid inlet of the heat exchanger; and causing, based on the target adjustment, actuation of the first valve.

A system includes a pressure exchanger (PX) configured to receive a first fluid at a first pressure, receive a second fluid at a second pressure, and exchange pressure between the first fluid and the second fluid. The first fluid is to exit the PX at a third pressure and the second fluid is to exit the PX at a fourth pressure. The system further includes a condenser configured to receive the first fluid from a compressor and provide corresponding thermal energy from the first fluid to a first environment. The system further includes a heat exchanger configured to receive the first fluid output from the condenser.

A system includes a refrigeration system for exchanging heat between a first cooling circuit and a second cooling circuit. The refrigeration system includes a pressure exchanger (310) for receiving a first fluid at a first pressure and a second fluid at a second pressure and exchanging pressure between the first fluid and the second fluid. The refrigeration system also includes a first heat exchanger (318) for exchanging heat between the first cooling circuit and a portion of the first fluid output from the pressure exchanger. The refrigeration system also includes a second heat exchanger (329) for exchanging heat between a portion of the first fluid entering the pressure exchanger and the second cooling circuit.

A refrigeration system (1) comprising a compressor (2), a condenser (3), an lamination member (4), an evaporator (5), and a fluid power machine (6) fluidically connected between the lamination member (4) and the evaporator (5), in which a working fluid circulates in a closed circuit. The fluid power machine (6) comprises a motor chamber, a motor member movably housed in the motor chamber, an inlet for the injection of working fluid into the motor chamber to move the motor member, and an outlet for the discharge of working fluid from the motor chamber.