159results 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.

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 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.

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 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.

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 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 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.

A system includes a refrigeration system to exchange heat between a first cooling loop and a second cooling loop. The refrigeration system includes a pressure exchanger (310) that is to receive a first fluid at a first pressure and a second fluid at a second pressure and exchange pressure between the first fluid and the second fluid. The refrigeration system further includes a first heat exchanger (318) to exchange heat between the first cooling loop and a portion of the first fluid output from the pressure exchanger. The refrigeration system further includes a second heat exchanger (329) to exchange heat between a portion of the first fluid that is to enter the pressure exchanger and the second cooling loop.

Provided are a cooling device and a cooling method that are capable of reducing the compression power used for cooling a raw material gas. This cooling device comprises: a gas introduction part that receives a compressed raw material gas from a raw material gas supply source; a first expansion part that allows a first portion of the raw material gas to expand; a first heat exchange part that cools a second portion of the raw material gas by using the first portion having a lowered temperature due to the expansion; and a compression part that compresses the first portion having an increased temperature due to the heat exchange, and that causes the first portion to converge with the raw material gas received from the gas introduction part.

The present invention relates to a combined plant comprising a heat pump circuit having a refrigerant evaporator designed to evaporate a refrigerant, a compressor designed to compress the refrigerant, the compressor fluidly connected to the refrigerant evaporator, a refrigerant condenser designed to condense the refrigerant, the refrigerant condenser fluidly connected to the compressor, a throttling device designed to reduce the temperature and pressure of the refrigerant, the throttling device fluidly connected to the refrigerant condenser and the refrigerant evaporator, and a heat generation plant having a cooling circuit with a refrigerant designed to heat the refrigerant during operation of the heat generation plant, the refrigerant fluidly connected to the refrigerant evaporator such that the refrigerant is heated in the refrigerant evaporator.

The description relates to a refrigeration system (10) for a motor vehicle (200) powered by an internal combustion engine and / or an electric motor vehicle (200) having a refrigerant circuit (11). The refrigerant circuit (11) comprises: a refrigerant compressor (12); a first heat exchanger (14), in particular a gas cooler or condenser; a second heat exchanger (16), in particular an evaporator; and a turbine device (18) arranged upstream of the second heat exchanger (16). Provision is made for the turbine device (18) to be mechanically and / or electrically connected to a dissipation device (20) configured to provide energy extracted from a refrigerant flow as heat by means of the turbine device (18). Furthermore, a motor vehicle (200) having such a refrigeration system (10) is described.

A refrigeration device according to an embodiment includes a compressor 11, a compressor downstream-side heat exchanger 12, an expander 21, and an expander downstream-side heat exchanger 22. The compressor 11 and the expander 21 are coupled to each other by a common drive shaft 18A. The compressor downstream-side heat exchanger 12 cools the natural refrigerant flowing out of the compressor 11, and the expander downstream-side heat exchanger 22 exchanges heat between the natural refrigerant flowing out of the expander 21 and a temperature control target. The compressor downstream-side heat exchanger 12 and the expander downstream-side heat exchanger 22 are then arranged to be aligned in a direction parallel to an axial direction Ax of the drive shaft 18A.

The invention relates to a system and method for storing electrical energy based on a closed thermodynamic cycle. It makes it possible to store electrical energy in a very efficient, economic and safe way. No environmentally harmful or expensive materials are required. The system comprises a compressor, a turbine and two packed bed storage units operating at different temperature levels. To charge the packed bed storage units, the cycle is operated as a counterclockwise heat pump process. In this process, the heat generated at the outlet of the compressor is expanded into the first packed bed storage unit at a high temperature level and stored therein. The "cold" generated during the subsequent expansion of the gaseous working medium in the turbine is stored in the second packed bed storage unit. This requires mechanical energy provided by an electric motor. To enable the energy storage system to deliver power, the cycle is operated in reverse (i.e. as a clockwise working cycle). Before entering the compressor, the working medium is cooled using the cold stored in the second packed bed storage unit, and after compression, heat is absorbed from the high-temperature packed bed storage system. The high-pressure hot working medium is expanded by means of the turbine, thereby generating energy.

A system is provided. The system (300A) comprises a pressure exchanger (310), PX, coupled to a motor (381), wherein the motor is configured to control an operating speed of the PX (310); a condenser (329), wherein an outlet of the condenser is fluidly coupled to a first inlet of the PX (310); a first pressure gauge (380) configured to provide first pressure data indicative of a pressure of a fluid of the condenser (329); and a first controller (390) configured to cause, based on the first pressure data, the motor (381) to adjust the operating speed of the PX (310).

A system for suppressing the generation of and removing impurities in a helium refrigerator according to the present invention comprises: a helium gas supply line for supplying helium to a helium compressor; a compressed oil circulation line for circulating and supplying compressed oil required to compress helium in the helium compressor; a helium circulation line that circulates the helium, supplied via the helium gas supply line, to compress the helium in the helium compressor together with the compressed oil supplied via the compressed oil circulation line, and then collect and use same; and a cooling water circulation line of a compressed oil storage device, wherein the cooling water circulation line is for preventing the compressed oil from becoming high in temperature due to heat generated when the helium and the compressed oil are compressed together in the helium compressor. The system includes a first controller signally connected to a first temperature detection sensor for measuring the temperature of the rear end of the helium compressor from the rear end of the helium circulation line, and controls the opening amount of a first control valve, installed at the front end of the compressed oil storage device of the compressed oil circulation line, to control the flow rate of compressed oil supplied to the helium compressor, and thereby control the temperature at the rear end of the helium compressor.

The invention discloses a cooling system of a cigarette making machine. The device comprises a vortex tube, a cigarette making unit and a heat exchanger, the vortex tube comprises a first air inlet and a cold end outlet; the first air inlet is communicated with a compressed air pipeline and is used for receiving air in the compressed air pipeline; the cold end outlet is communicated with the cigarette making unit and is used for inputting the output first air into the cigarette making unit; the cigarette making unit communicates with the heat exchanger and is used for inputting the output second air into the heat exchanger for heat exchange; the heat exchanger further communicates with the workshop and is used for discharging the output third air to the workshop; wherein the temperature of the first air is lower than that of the second air; the temperature of the third air is lower than that of the second air. According to the technical scheme, the heat of the roll-packing unit is efficiently transferred into the heat exchanger, the temperature of the cigarette making unit is maintained to be matched with the process requirement of the workshop, then the energy consumption of temperature control of the air conditioner is reduced, and the energy consumption of the roll-packing workshop is reduced and the temperature is stabilized.