239results about "Compression machines" patented technology

A superconducting equipment cooling device includes a cryocooler that cools superconducting equipment, an interface configured to receive a selection of a plurality of performance parameters of the cryocooler by a user and generate an operation mode setting representing the selected plurality of performance parameters, and a controller configured to receive the operation mode setting from the interface and control a plurality of operation parameters of the cryocooler that affect the selected plurality of performance parameters.

A process for conversion of a first refrigeration system including a first medium temperature circuit and a first low temperature circuit configured to circulate a synthetic refrigerant to a second refrigeration system includes replacing the first low temperature circuit with a second low temperature circuit by adding a heat exchanger to the first refrigeration system such that the second low temperature circuit is in a heat exchange relationship with the first medium temperature circuit, replacing a condenser of the first medium temperature circuit with a gas cooler, and connecting the second low temperature circuit to the first medium temperature circuit via pipe connections such that the low temperature compressor is fluidly connected to a medium temperature compressor of the first medium temperature circuit.

The application discloses a transcritical CO2 ultra-high temperature heat pump system and a temperature control method, wherein supercritical CO2 is a high-temperature and high-pressure fluid at the outlet of a gas cooler, throttles to an evaporation pressure, and a large amount of throttling loss exists, which leads to the decrease of the heating energy efficiency ratio of the transcritical CO2 heat pump system, and is not conducive to the best energy-saving benefit of the ultra-high temperature heat pump. In view of the above problems, the application innovatively couples gas-electric dual-drive technology, two-stage compression intermediate cooling technology and mechanical supercooling technology, which can effectively reduce the high-pressure fluid temperature before the throttling valve of the CO2 working medium, reduce the throttling loss, drive the supercritical compressor through the adjustable turbine expander, reduce the power consumption of the compressor, improve the heating energy efficiency of the CO2 heat pump system, and flexibly and efficiently and stably supply steam in a wide range of variable working condition adjustment, improve the full working condition operation efficiency, achieve the purposes of energy saving and emission reduction and production cost reduction, and further widen the application range and application prospect of the high-temperature heat pump system.

The present invention relates to heat transfer systems and methods involving zinc-containing surfaces in contact with a working fluid comprising refrigerant, lubricant and a protective agent comprising a compound according to Formula I where R and R1 are each independently selected from the group consisting of hydrogen, alkyl, hydroxyalkyl and alkylthio, provided that at least one of R and R1 is alkylthio.

The application discloses a hydrogen production method, system, equipment, medium and product integrated with a carbon dioxide heat pump, characterized in that the method is suitable for a hydrogen production system, and the hydrogen production system comprises a water vapor circulation module, an electrolysis reaction module and a supercritical carbon dioxide circulation module; water stored in a water collecting tank is pressurized by a water pump in the water vapor circulation module to obtain pressurized water, the pressurized water is subjected to heat exchange treatment based on target supercritical carbon dioxide working medium obtained by an air cooler in the water vapor circulation module to obtain heated water; the heated water is subjected to heat exchange treatment again by a high-temperature heat exchanger in the water vapor circulation module to obtain target water vapor; and the target water vapor is subjected to an electrochemical decomposition reaction by a solid oxide electrolysis cell in the electrolysis reaction module under the condition of continuous heating of the supercritical carbon dioxide circulation module to obtain hydrogen. The application can improve the hydrogen production efficiency of the solid oxide electrolysis cell under the condition of supercritical carbon dioxide high-temperature heat pump circulation.

A cryocooler (10) includes: a cold head (14) including a first cooling stage (33) and a second cooling stage (35) cooled to a lower temperature than the first cooling stage (33); a heater (46) thermally coupled to the first cooling stage (33); a first temperature sensor (48a) that measures a first temperature of the first cooling stage (33); and a controller (50) configured to, during a cool-down operation of the cold head (14), acquire a first temperature of the first cooling stage (33) from the first temperature sensor (48a), and control the heater (46) to cause the first temperature of the first cooling stage (33) to follow an intermediate target temperature which is lower than an initial temperature of the cool-down operation and higher than a final target temperature of the first cooling stage (33).

The application discloses a CO2 variable-temperature and variable-pressure adsorption coupled peak regulation and heat supply system and an operation method thereof, relates to the technical field of CO2 energy storage and combined heat and power, and discloses the following technical scheme: a low-pressure adsorption heat storage unit adopts a parallel structure of a low-pressure adsorption heat storage tower group and is internally filled with heat-resistant CO2 adsorbents, stores heat energy and performs variable-temperature adsorption of CO2 in a cycle; a high-pressure adsorption pressure storage unit adopts a high-pressure adsorption pressure storage tower and is internally filled with pressure-resistant CO2 adsorbents, stores pressure potential energy and performs variable-pressure adsorption of CO2 in a cycle; a compression and work unit comprises a compressor, a compression heat exchanger, a variable-pressure adsorption storage and release heat exchanger, an expander, a regenerator and a power grid port; a heat storage and supply circuit comprises a heat storage heat pump, a heat release heat pump, a heat supply connection switch and a heat network port, and a heat conduction medium is arranged in the heat storage and supply circuit. The application deeply combines CO2 storage technology and peak regulation and heat supply, realizes efficient peak regulation and flexible heat supply, simultaneously simplifies the system structure and improves the economic efficiency of system operation.

The utility model provides a kind of carbon dioxide heat pump with two combined energy structure belongs to heating ventilation air conditioning technical field;Including fan, middle bracing, fin and bottom frame assembly;Fan is installed in upper portion, middle bracing is installed in middle portion, fan is fixed with fin and bottom frame assembly by bolt through fan fixing plate.The carbon dioxide heat pump with two combined energy structure of the utility model can meet the demand of domestic hot water supply (hot water temperature 55~90 DEG C) and building heating (heating water temperature 35~65 DEG C) simultaneously, with the advantages of high energy comprehensive utilization efficiency, one machine multiple functions.Compared with the traditional single-function heat pump system has more extensive application scenarios.

The present application provides a vapor compression heat pump and compression-ejection heat pump system, belonging to the technical field of heat pump. The compressor has a refrigerant vapor passage connected with a heat supplier, the heat supplier also has a condensate pipeline connected with a distribution chamber through a nozzle, the distribution chamber has a refrigerant vapor passage connected with the high-pressure steam inlet of an ejector, the distribution chamber also has a condensate pipeline connected with an evaporator through a throttle valve, the evaporator also has a refrigerant vapor passage connected with the low-pressure steam inlet of the ejector, the ejector also has a medium-pressure refrigerant vapor passage connected with the compressor; the heat supplier also has a heated medium passage connected with the outside, the evaporator also has a low-temperature heat medium passage connected with the outside, forming a vapor compression heat pump.

The invention relates to a refrigerant collector (1) for a refrigeration circuit, comprising: - a housing (2) with a collecting chamber (3) for liquid refrigerant with temperature-variable density ρ R(T) and for refrigerator oil with temperature-variable density p L(T), - an inlet channel (4), via which the refrigerant and the refrigerator oil are supplied to the collecting chamber, - an outlet channel (6), via which the refrigerant and the refrigerator oil are removed from the collecting chamber and which is connected to the collecting chamber via a refrigerant suction opening (9), a geodetically lowest first oil duct (10) and a second oil duct (11), - and a float device (113, 213, 313, 413) which is located in the collecting chamber and has a float (115, 116, 215, 315, 415, 416) which is exposed to the liquid refrigerant and an effective density ps, for which, at different temperatures T 1 und T2 of the refrigerant where T2>T1, the following relationships apply: pR(T1)>ps>pR(T2), such that the float is located at the first temperature T1 at a geodetically high position of the collecting chamber and at the second temperature T2 at a geodetically low position of the collecting chamber. The following relationships should apply: ρR(T1)>ρL(T1) and ρR(T2)<ρL(T2), wherein the float device keeps the first oil duct closed at the first temperature T1.

The present application relates to the technical field of heat pump, in particular to a thermoacoustic heat pump device. The present application aims to solve the problem that the application scene of the existing vapor compression heat pump is limited. For this purpose, the thermoacoustic heat pump device of the present application comprises: a thermoacoustic machine comprising a hot end heat exchanger and a cold end heat exchanger; a compressor in circulation communication with the cold end heat exchanger; a first heat exchanger, one end of which is in communication with the suction port of the compressor; a throttling element, two ends of which are respectively in communication with one end of the cold end heat exchanger and the second end of the first heat exchanger; a second heat exchanger in circulation communication with the hot end heat exchanger through a first cold carrier pipeline; a first pump body arranged in the first cold carrier pipeline; the intermediate heat exchanger has a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path is communicated between the exhaust port of the compressor and the throttling element, and the second heat exchange flow path is communicated with the first cold carrier pipeline. The present application can realize the combination of the thermoacoustic machine and the vapor compression heat pump, and improve the applicability and working efficiency of the thermoacoustic heat pump device.

The present invention provides a refrigerant composition comprising from about 50% to less than 65% by weight of HFO-1234ze(E), from 1% to less than 12.5% by weight of HFC-134a, and from about 25% to about 42% of HFCO-1233zd(E).

By extending the lifespan of the refrigeration unit and reducing the frequency of replacement, the operating rate of the MRI system will be improved. [Solution] The cold head life extension mode is implemented. In the cold head life extension mode, the refrigerator's displayer is operated at a constant frequency lower than a predetermined upper frequency, regardless of the temperature of the superconducting coil, and the compressor inverter controls the drive frequency of the compressor drive unit according to the temperature of the superconducting coil.

The application discloses a low-vibration active phase modulation composite pulse tube Stirling cryogenic refrigerator and belongs to the technical field of cryogenic refrigerators. The composite refrigerator cold finger integrates a first Stirling component as a high-temperature stage and a second pulse tube component as a low-temperature stage. The innovation is that the phase modulation unit of the second pulse tube component is composed of a second inertia tube wound and fixed in the inner circle of the gas reservoir, and the gas reservoir is integrally connected to the first cold end heat exchanger to improve the system efficiency through low-temperature arrangement. At the same time, the motion state of the compressor piston and the first displacer is monitored and cooperatively controlled in real time through the compressor displacement sensor and the cold finger displacement sensor, active and accurate phase modulation is realized, and the active vibration damper is used to perform reverse compensation according to the motion feedback of the first displacer to significantly offset the vibration output of the whole machine. The application realizes the unity of high efficiency, low vibration and high reliability, and is particularly suitable for vibration-sensitive space exploration and other application scenarios.

A reefer container is provided with: a container body; an air refrigerant line having a suction port and a blowout port each of which is disposed inside the container body; a compressor disposed in the air refrigerant line and configured to compress air suctioned from inside the container body to the air refrigerant line through the suction port; at least one heat exchanger disposed in the air refrigerant line and configured to cool the air compressed by the compressor; and a turbine disposed in the air refrigerant line and configured to expand the air cooled by the at least one heat exchanger. The air refrigerant line includes: a suctioned air line for directing the air suctioned from the suction port to the compressor; a compressed air line for directing the air compressed by the compressor to the turbine; and an expanded air line for directing the air expanded by the turbine to the blowout port. The compressor, the at least one heat exchanger, and the turbine are disposed, in an exterior space of the container body, along a partition wall that separates an interior space of the container body and the exterior space.

The application discloses a kind of green building ventilation systems, including ventilation box, the ventilation box both ends are equipped with ventilation component for the ventilation of building interior, the ventilation component includes first air pipe, second air pipe, third air pipe and fourth air pipe.The application is ventilated to building, and indoor, outdoor gas heat exchange is carried out, first heat exchange component recovers exhaust energy, preheats or preheats fresh air, and air conditioning energy consumption is significantly reduced;Vortex tube is combined with second heat exchange component, and in the absence of refrigerant, fresh air is deeply cooled or heated, and the temperature of air sent into control room and other key areas is suitable.Especially, the humidifying component integrated in the system can actively humidify in dry winter conditions, prevent static electricity from being generated, and provide a safe and stable operating environment for precision electronic equipment in the substation, meet the energy-saving and reliable operation requirements of green substations, and solve the environmental control problem of substation auxiliary buildings.

The application discloses a method for manufacturing a large-heat-exchange-capacity low-flow-resistance low-temperature helium cabin, which comprises radiation red copper plates, red copper cooling coil pipes and a helium cabin support, the interior of the radiation red copper plate of the helium cabin is sprayed with special low-temperature black paint to make the internal emissivity greater than 0.92, and the radiation efficiency is greatly improved, the red copper cooling coil pipe adopts three-branch flow parallel cooling of the radiation red copper plate of the helium cabin, the temperature rise of the cooling helium flow is reduced, and the temperature difference of the whole helium cabin is very small, the low-temperature freezing red copper pipe bending process of the special equipment is adopted to ensure that the cooling coil pipe is not concave and wrinkled, the cooling helium flow resistance meets the requirements, the optimized low-temperature tin soldering welding process and the use of red copper pressing sheets and special aluminum foils greatly improve the heat transfer area and ensure the heat transfer efficiency.

Cryogenic systems that provide stronger heat transfer between thermalization stages in cryogenic stages compared to conventional systems. The stronger heat transfer can reduce the cooldown time of the cryogenic systems herein compared to conventional systems. The cryogenic systems may include a reciprocating rapid cooldown loop configured to exchange volumes of fluid between different cryogenic stages of the system. The exchanged fluid may be configured to exchange heat between these different stages of the system. This heat exchange allows the lower temperature stages of cryogenic systems to perform initial cooling using the more powerful coolers of the higher temperature stages of the systems. The reciprocating cooldown loop may selectively transfer fluid between a pulse tube cryocooler and other colder stages of the cryogenic system, allowing the powerful pulse tube cryocooler to assist the colder stages of the system, reducing the time required for the initial cooldown of the system.

The present application provides a catalyst regeneration energy recovery heat pump system, belonging to the technical field of heat pump. The outside has an air channel connected with an internal combustion engine through a compressor and a high-temperature heat exchanger, and has a fuel channel connected with the internal combustion engine. The internal combustion engine has a gas channel connected with the outside through a high-temperature steam generator and a low-temperature steam generator. A second compressor is connected with a heat supplier. The heat supplier is connected with the low-temperature steam generator through a booster pump and is connected with an evaporator through a throttle valve. The evaporator is connected with a jet pump low-pressure port. The low-temperature steam generator is connected with a jet pump high-pressure port. The jet pump is connected with the second compressor. A liquid medium pipeline is connected with the second jet pump high-pressure port through a second booster pump and the high-temperature steam generator. A heated medium channel is connected with the second jet pump low-pressure inlet through the heat supplier. The second jet pump is connected with the outside. The internal combustion engine has a cooling medium channel. The high-temperature heat exchanger has a high-temperature heat medium channel. The evaporator has a low-temperature heat medium channel connected with the outside, forming an energy-carrying internal combustion engine combined cycle heat pump system.

The use as a refrigerant of a composition comprising 1,1-difiuoroethyiene in a liquid chiller system.

A heat pump system for a vehicle is capable of performing cooling or heating of a vehicle interior by using a natural refrigerant in compliance with environmental regulations, and by efficiently adjusting the temperature of the battery module by using a single chiller where a refrigerant and a coolant heat-exchange each other. The heat pump system is capable of maximizing the cooling and heating performance by operating in the supercritical cycle, in which the pressure and temperature of the refrigerant is higher than a critical pressure and temperature, by applying R744 refrigerant, which is a natural refrigerant utilizing carbon dioxide.

The application discloses a hydrogen production process waste heat cascade utilization system for a natural gas power station, and belongs to the technical field of hydrogen energy preparation and energy cascade utilization. The system comprises a natural gas power generation unit, a methane reforming hydrogen production unit, a passive refrigeration unit, a hydrogen liquefaction precooling unit and a domestic hot water supply unit. The working process is as follows: high-temperature flue gas is generated by burning natural gas, and the high-temperature flue gas is used to drive power generation; the flue gas after power generation is introduced into the methane reforming hydrogen production unit, and the waste heat of the flue gas is used for a methane reforming reaction to produce hydrogen; the used flue gas is continuously introduced into the passive refrigeration unit as a driving heat source, and the passive refrigeration unit generates cold energy through a mechanical compression-free refrigeration cycle; the hydrogen to be liquefied is introduced into the hydrogen liquefaction precooling unit, and the cold energy is used to precool the hydrogen in multiple stages, so that the temperature of the hydrogen is reduced to a required temperature before deep cooling. The required working medium cold energy is accurately and efficiently converted, so that the energy self-sufficiency and synergistic effect of hydrogen production and hydrogen liquefaction are realized.

A refrigeration system includes a first refrigerant circuit for circulating a primary refrigerant to provide conditioning to a target space and a second refrigerant circuit to cool the primary refrigerant by transferring heat from the primary refrigerant to a secondary refrigerant. The first refrigerant circuit includes a flash tank, a pump configured to pump the primary refrigerant received from the flash tank, and an indoor heat exchanger configured to provide air conditioning to the target space by transferring heat between the primary refrigerant and the target space. The second refrigerant circuit comprises a compressor configured to compress the secondary refrigerant received from an internal heat exchanger, the internal heat exchanger configured to facilitate heat exchange from the primary refrigerant to the secondary refrigerant, and the outdoor heat exchanger positioned downstream of the compressor, and configured to condense the secondary refrigerant by releasing heat from the secondary refrigerant to outdoors.

A pneumatically driven cryogenic refrigerator, primarily operating on a Gifford-McMahon (GM) cycle, switches from cooling to heating via a switching valve between a rotary valve and a drive piston that causes the displacer to reciprocate. The rotary valve has ports at two radii: one circulates flow to the displacer, and the second circulates flow to the drive piston. Both ports circulate flow to the top of the drive piston; the "cooling" port optimizes the cooling cycle, while the "heating" port provides a good heating cycle. The switching valve that changes flow from one port to the other can be linearly or rotary actuated. The rotary valve does not reverse direction.

This invention belongs to the field of cryogenic refrigeration technology and discloses a cryogenic refrigeration system coupled with a heat pump. The system includes a reverse Brayton refrigeration cycle and a heat pump cycle. The refrigeration cycle includes a compression unit, a refrigeration side channel of a heat coupling unit, an expansion unit, and a cold user connected in sequence. The heat pump cycle includes a heat pump compression unit, a condensation heat release unit, a throttling unit, and a heat pump side channel of the heat coupling unit connected in sequence. The heat coupling unit can transfer the heat from the high-temperature refrigerant discharged from the compression unit to the heat pump working fluid, simultaneously realizing the recovery of waste heat from compression and the pre-cooling of the refrigerant. This invention abandons the direct discharge of waste heat, solving the problem of traditional systems focusing only on single refrigeration and insufficient utilization of low-grade energy, improving energy utilization efficiency, eliminating the need for an additional independent cooling system, simplifying the structure, and reducing equipment investment and operating energy consumption. While retaining the advantages of reverse Brayton cycle cryogenic refrigeration, it achieves synergistic energy utilization and has good engineering adaptability.

The present application relates to the technical field of heat pump, especially to a thermoacoustic heat pump system, which comprises a compression device, an ejector, a first heat exchanger, a regenerator and a second heat exchanger. The ejector moves in response to the acoustic power and pressure fluctuation generated by the compression device, and a first cavity is formed on the inner side of the ejector, and a second cavity is formed between the outer side of the ejector and the compression device; the regenerator is connected with the first heat exchanger, used for converting acoustic power into heat pumping capacity, and a third cavity is arranged on the inner side of the regenerator, which is communicated with the first heat exchanger and the first cavity respectively; the second heat exchanger is connected with the regenerator and the second cavity. Wherein, the first heat exchanger is arranged away from the compression device compared with the second heat exchanger. The present application provides a thermoacoustic heat pump system, which changes the energy flow path by setting the third cavity, exchanges the positions of the first heat exchanger and the second heat exchanger, keeps the high-temperature side away from the compression device, ensures the heat pump efficiency and operation stability, and prolongs the service life.

The application provides a carbon dioxide transcritical prying block refrigerating unit fault diagnosis method, and belongs to the technical field of fault diagnosis based on machine learning; the application is aimed at the differences in signal-to-noise ratio interference and parameter convergence speed in multi-dimensional heterogeneous physical field environment measurement, and proposes a multi-scale heterogeneous parameter steady-state working condition discrimination and tensor construction method, and innovatively introduces an independent discrimination and Boolean intersection joint locking mechanism; aiming at the defect that the multi-variable thermal coupling of the carbon dioxide transcritical prying block refrigerating unit leads to hidden faults that are difficult to quantify, a physical and data dual-driven implicit state analysis model is designed; aiming at the feature overlapping area and coupling interference misjudgment caused by the internal closed loop cascade of the system, a fault classification method depending on an enhanced graph attention network topology aggregation and integrated voting mechanism is proposed. The application realizes high-precision fault diagnosis of the carbon dioxide transcritical prying block refrigerating unit.