233 results about "Cryocooler" patented technology

A feed gas including neon, nitrogen, and helium is cooled in a heat exchange system to a first temperature to produce a two-phase mixture that is introduced into a first phase separator and separated into a nitrogen-rich liquid and a first gaseous crude neon stream. The pressure is reduced in at least a portion of the nitrogen-rich liquid, which is vaporized in the heat exchange system to generate a portion of the refrigeration therein. The first gaseous crude neon stream is introduced into a first adsorber that removes impurities such as nitrogen. The gaseous crude neon stream is further cooled to a second temperature. A portion of the cooling duty may come from the heat exchange system and another portion may come from a cryocooler to produce a two-phase stream. The two-phase stream is separated in a second phase separator into a crude helium vapor stream and a crude neon liquid stream with the latter being introduced into a distillation column to produce a vent stream containing a helium impurity and a pure liquid neon product. The pure liquid neon product is vaporized in the heat exchange system to generate refrigeration and produce the pure gaseous neon product.

The invention discloses a low-vibration long-service-life rotary split type Stirling cryocooler, relates to the technical field of cryocoolers, and aims to solve the technical problems that reciprocating movement of a single compression piston has rotary inertia force, and a connecting rod in the single compression piston swings during movement, so that large vibration is generated. Comprising a compressor body and an expansion machine body which are arranged in a split mode. The motion states of the two compression pistons can be the same all the time through the symmetrical centering crank sliding block mechanisms which are completely equal in size and weight, then the momentum of the compressor is balanced, and finally reciprocating and rotating inertia force of the crank sliding block mechanisms is completely eliminated, and only extremely small vibration is generated. And a compressor is assisted to generate periodic pressure wave driving, and a gas spring is formed by using a dynamic seal, so that the discharger and the gas spring supported by the discharger form a forced vibration system, the formed damping force can generate a proper phase difference, and finally, an effective refrigeration effect is generated.

The invention discloses a method and equipment for preparing high-purity electronic-grade hydrogen chloride from hydrogen-rich hydrogen chloride feed gas. The bid invitation comprises the following steps: (1) removing water through a two-stage deep freezer; (2) further removing water through adsorption of an adsorption tower; (3) rectifying: directly discharging gas-phase materials at the top of the tower, namely hydrogen, carbon dioxide and other non-condensable steam, into an alkali washing section; (4) introducing the material into a light component removal tower for further rectification, directly discharging a gas-phase material at the top of the tower, namely hydrogen chloride gas containing C1 and C2, into an alkali washing section, and circulating a material at the bottom of the tower back to the light component removal tower through a dehydrogenation tower; and (5) introducing the material into a heavy component removal tower for further rectification, directly discharging hydrogen chloride liquid containing chlorine and other high-boiling-point impurities in a tower kettle into an alkali washing section, and extracting a vapor phase at the top of the tower to obtain high-purity electronic-grade hydrogen chloride. According to the method, the load of the adsorption tower is reduced, and the treatment capacity per unit time is increased; the method has the advantages of simple process, low energy consumption, high recovery rate, easiness in stable preparation of high-purity electronic-grade hydrogen chloride, and facilitation of improvement of production scale and yield.

The invention discloses an inverted 2K liquid-helium-free low-temperature probe station based on a GM refrigerating machine. The inverted 2K liquid-helium-free low-temperature probe station comprises a 2K plate, a vacuum cavity, a refrigerating system and a heat insulation assembly. The refrigerating system comprises a GM refrigerating machine, a thermal switch and a helium circulating system, and the GM refrigerating machine adopts a two-stage GM refrigerating machine, is inverted and extends into the vacuum cavity; the helium circulation system comprises a superflow helium pool installed at the bottom of the 2K plate, the helium circulation system takes away the cooling capacity of the refrigerating machine through circulation helium, the temperature is further reduced through throttling cooling and evacuation pressure reduction, and a 2K low-temperature environment is achieved at the 2K plate. The thermal switch provides cooling capacity for the 2K plate during initial operation so as to realize cooling; the heat insulation assembly comprises multiple stages of heat radiation screens and is used for reducing radiation heat leakage to the vacuum cavity. The 2K plate layout with the 2K plate temperature lower than 2K and the upward direction can be provided, and extra refrigerating working media such as liquid helium are not consumed.

The utility model discloses a multi-working-condition full-automatic pool cooling system which comprises a vacuum water tank, the vacuum water tank is connected with a cooling water pump inlet pipeline, and the cooling water pump inlet pipeline is connected with the inlet end of a low-temperature cooler and the inlet end of a high-temperature cooler. Outlet pipelines of the low-temperature cooler and the high-temperature cooler are connected with a water tank side water supply pipeline; the cooling water pump inlet pipeline is provided with a cooling water pump, the pipeline of the cooling water pump is provided with a cooling water pump inlet electric ball valve, and the outlet pipeline of the cooling water pump is provided with a cooling water pump outlet local pressure gauge and a cooling water pump outlet remote transmission pressure transmitter; the inlet ends of the low-temperature cooler and the high-temperature cooler are connected with a circulating cooling water pipeline, and all the electric valves and the sensors are electrically connected with the control cabinet. The control system compares the real-time temperature value of the cooling water with the set value of the system, manual valve opening and closing and water pump starting are not needed, the function requirement for adjusting the temperature of the cooling water is met, and the system can be suitable for various working conditions.

A cryopump includes: a cryopump container defining a cryopump intake port; a cryocooler including a first cooling stage and a second cooling stage; a radiation shield thermally coupled to the first cooling stage and extending from the cryopump intake port into the cryopump container; an intake port plate thermally coupled to the first cooling stage and extending along a plane perpendicular to an axial direction, a gas inlet being formed between the intake port plate and the radiation shield; a cryopanel unit thermally coupled to the second cooling stage and disposed inside the radiation shield, a frost accommodation space being formed between the cryopanel unit and the intake port plate; and a skirt thermally coupled to the first cooling stage and extending from an outer periphery of the intake port plate into the radiation shield, a gas flow path being formed between the skirt and the radiation shield.

The utility model provides a tail gas pre-washing, pressurizing and cryogenic system, which relates to the technical field of polycrystalline silicon production and comprises a tail gas pre-washing device and a tail gas pressurizing and cryogenic device, the tail gas pre-washing device is used for removing dust from dust-containing tail gas; the tail gas pressurizing and copious cooling device comprises a compressor, an air cooler, a tail gas condensate tank, a second heat exchanger and a tail gas copious cooler which are connected in sequence; after a stream of a gas phase outlet of the tail gas condensate tank enters the second heat exchanger, a first condensed stream and a first gas phase stream are obtained; the first gas-phase stream enters a tail gas deep freezer to obtain a second condensation stream and a second gas-phase stream; and the second gas-phase stream flows through the second heat exchanger and then enters a tail gas leaching system at the rear end. And the problems of abrasion of the compressor and blockage of the interstage cooler are solved by dedusting the dust-containing tail gas. An air cooler, a tail gas condensate tank, a second heat exchanger and a tail gas deep freezer are additionally arranged on the basis of a compressor, chlorosilane can be recycled, and the load of a tail gas leaching system can be reduced.

A compressor unit of a cryocooler includes: a compressor motor; an inverter that converts, into drive power of the compressor motor, AC power input to the compressor unit from an external power source; a transformer that converts the AC power into drive power of a cold head of the cryocooler of which a voltage is different from a voltage of the AC power, and a control panel on which the inverter and the transformer are mounted.

There is provided a regenerative cryogenic system comprising a pulse tube assembly comprising one or more stages configured to generate cryogenic temperatures below 4.2 Kelvin, one or more flanges configured to provide vacuum interface or thermalization, the one or more flanges coupled to the pulse tube assembly, and a still pumping line integrated with the one or more of the flanges, the still pumping line configured to provide a flow path for still gas of a dilution refrigerator.

There is provided a regenerative cryogenic system comprising a pulse tube assembly comprising one or more stages configured to generate cryogenic temperatures below 4.2 Kelvin, one or more flanges configured to provide vacuum interface or thermalization, the one or more flanges coupled to the pulse tube assembly, and a still pumping line integrated with the one or more of the flanges, the still pumping line configured to provide a flow path for still gas of a dilution refrigerator.

A wearable garment, such as a vest, for providing thermal conditioning, for example cooling and / or heating, to a user. The vest may be used with cryogenic temperatures. Peltier devices, pre-charged nitrogen canisters, or miniature Stirling cryocoolers may be mounted and built into the wearable or externally carried or mounted thereto. A pump, such as a vacuum diaphragm pump, causes thermally conditioned air to flow through a series of porous regenerative tubing and / or porous panels to supply conditioned air to a user of the garment. The system may use a cryocooler having a pulsating cold finger. The cryo embodiments may supply −200° C. gas through the panels or tubing. Portable systems can be carried or attached, such as HVAC, refrigeration, heating or the like. Control systems may regulate the temperature and may be adjusted by a user, for example using an input pad or a mobile device.

The invention provides a multi-mode whole-ship thermal management system for a hydrogen energy power ship, which comprises a high-temperature cooling liquid loop, a low-temperature cooling water loop, a heat pump loop and an outboard water loop, and is characterized in that the high-temperature cooling liquid loop is connected with the low-temperature cooling water loop and the heat pump loop through a high-temperature multi-flow cooler; the low-temperature cooling water loop is connected with the outboard water loop through a low-temperature cooler; the high-temperature cooling liquid loop comprises a fuel cell stack and a lithium battery, and a first cooling medium of the high-temperature cooling liquid loop cools the fuel cell stack and the lithium battery; a second cooling medium of the low-temperature cooling water loop cools the first cooling medium; the medium of the outboard water loop cools the second cooling medium; the heat pump loop is connected with the living quarter. Through cooperation of the high-temperature cooling liquid loop, the low-temperature cooling water loop and the outboard water loop and addition of the heat pump system, fuel cells, ship motors and other equipment are fully cooled, meanwhile, the cabin refrigerating or heating function is provided, waste heat is stored, and the heat requirement of living quarters is met.

The present invention relates to a boil-off gas reliquefaction system for a ship. The boil-off gas reliquefaction system for a ship according to the present invention, whereby boil-off gas generated from a liquefied natural gas (LNG) storage tank for a ship is reliquefied, comprises: a first heat exchanger for recovering cold heat from a first boil-off gas generated in the storage tank; a multi-stage compressor for compressing the boil-off gas that has passed through the heat exchanger; a high-pressure gas line for supplying high-pressure gas that is supplied from the multi-stage compressor; a low-pressure gas line for supplying the boil-off gas, which is supplied from the multi-stage compressor, as a low-pressure gas by using a decompression valve; a second heat exchanger in which heat exchange occurs between the high-pressure gas line and the low-pressure gas line downstream of the decompression valve; and a third heat exchanger by which the boil-off gas that has passed through the second heat exchanger is cooled by means of heat medium oil of a cryogenic chiller.

Cryocooler systems are provided that include a section of helium gas supply line extending between a first and a second stage, this section being thermally coupled to both the regenerator and the PT tube. Systems are provided that include sections of helium gas supply line extending between the first and second stages, designed to be thermally coupled to the helium recirculation section. Systems are provided that include a section of the regenerator located between the first and second stages, containing at least one discrete heat exchanger. Methods for cooling helium gas flowing into the cryocooler are also provided.

This disclosure describes systems, methods, and apparatus for improving the cooldown time, or efficiency of cooling systems, for a low-frequency one or multi-stage pulse-tube refrigerator. More specifically, actuation is performed on the driving frequency of the oscillating pressure and flow, on flow resistance of valves in the acoustic network that terminate the LF-OPTR or LF-DIPTR, and / or on the asymmetric flow resistance of the bypass valves in a LF-DIPTR's flow network. The actuation of these parameters is informed by measurements of the output pressure or output-input differential pressure at the steady flow compressor, the temperature of each stage of the refrigerator, and the temperature difference between the final stage and upper stages of the refrigerator, to name a few non-limiting examples.

A superconducting equipment cooling device includes a cryocooler (10) that cools superconducting equipment, an interface (110) configured to receive selection of a plurality of performance parameters of the cryocooler (10) by a user and generate an operation mode setting (S1) representing the selected plurality of performance parameters, and a controller (120) configured to receive the operation mode setting (S1) from the interface (110) and control a plurality of operation parameters of the cryocooler (10) that affect the selected plurality of performance parameters.

Techniques for reel-to-reel assessment of a high-temperature superconducting (HTS) tape are provided. The techniques include a cryocooler-powered cryogenic system configured to cool the HTS tape in a background magnetic field. The cryocooler-powered cryogenic system may be free of liquid cryogenic. The cryocooler-powered cryogenic system may include a measurement zone, where the magnetic field is perpendicular to the path of the HTS tape. The techniques may also include a Hall sensor array within the measurement zone. The Hall sensor array may be configured to scan a magnetic field at a surface of the HTS tape to measure a screening-current-induced field and separate it from the background magnetic field. The techniques may also include a data acquisition (DAQ) module operably coupled to the Hall sensor array. The DAQ module may be configured to oversample Hall voltages.

The utility model relates to a low-temperature refrigerating device which comprises a sealing shell, the sealing shell defines a fluid-tight vacuum volume sealed by a cover cap, the device comprises at least one low-temperature cooler which penetrates through the cover cap and is of the type using a low-temperature circulating fluid cold source such as helium, and the device comprises at least one heat conduction plate. The heat transfer plate is used for receiving and cooling a component and is cooled by a circulating fluid flow through a circulating fluid loop, the circulating fluid loop supplies fluid to a group of heat exchangers, the circulating fluid loop is provided with a pipeline, the pipeline firstly conveys the circulating fluid to a manifold mounted on the plate, and the circulating fluid loop is provided with at least one transfer pipeline which transfers the circulating fluid to the manifold. And a circulating fluid circuit having a transfer conduit configured to transfer the circulating fluid from the manifold to at least one heat exchanger mounted on the same plate, the circulating fluid circuit having at least one first return conduit configured to return the fluid having circulated through the at least one heat exchanger to the manifold.

This invention provides a multi-mode whole-ship thermal management system for hydrogen-powered ships, including a high-temperature coolant circuit, a low-temperature cooling water circuit, a heat pump circuit, and an outboard water circuit. The high-temperature coolant circuit is connected to the low-temperature cooling water circuit and the heat pump circuit via a high-temperature multi-stream cooler, and the low-temperature cooling water circuit is connected to the outboard water circuit via a low-temperature cooler. The high-temperature coolant circuit includes a fuel cell stack and a lithium battery, with its first cooling medium cooling the fuel cell stack and the lithium battery. The low-temperature cooling water circuit's second cooling medium cools the first cooling medium. The outboard water circuit's medium cools the second cooling medium. The heat pump circuit connects to the living quarters. This invention, through the coordination of the high-temperature coolant circuit, the low-temperature cooling water circuit, and the outboard water circuit, and the addition of a heat pump system, effectively dissipates heat from the fuel cell and other equipment such as ship motors, while simultaneously providing cabin cooling or heating functions, storing waste heat, and meeting the heat requirements of the living quarters.

Processes and systems are provided for treating the tail gas stream of a sulfur recovery plant. The process comprising the steps of treating the compressed tail gas stream in a pre-treatment unit to remove the impurities; separating the dry stream in a first stage membrane unit, the first stage membrane unit comprises a membrane selective to carbon dioxide and hydrogen; reducing a temperature of the cryogenic feed in a cryogenic cooler to produce a cryogenic stream; separating the cryogenic feed in a knock-drum to produce a liquid carbon dioxide and membrane feed; separating the membrane feed in a second stage membrane unit to produce a rubbery membrane permeate and a rubbery membrane retentate, where the second stage membrane unit comprises a membrane selective to carbon dioxide over hydrogen; and treating the rubbery membrane retentate in a hydrogen recovery process to produce a hydrogen product stream and a carbon dioxide lean stream.

A regenerator for a cryocooler includes a cell, a flow passage, a capillary and supporting elements. A cell wall encloses a cavity with sub-cavities. A connecting passage connects a first sub-cavity to a second sub-cavity. A first cell partition is disposed between the first and second sub-cavities. The flow passage is also disposed between the first and second sub-cavities. During operation of the regenerator, helium in the cavity functions as a heat-storing material, while helium that flows through the flow passage functions as a working gas. The capillary forms a pressure-equalizing opening in the cell wall and connects the helium that functions as the heat-storing material inside the cavity to the helium that functions as the working gas outside the cavity. The supporting elements are inside the first sub-cavity and separate the first cell partition from a second cell partition. The first and second cell partitions enclose the first sub-cavity.

An initial cooling time of a cryocooler (10) is shortened. A method for operating a cryocooler 10 includes: connecting a second compressor 80 in series with a first compressor 12 on a high pressure line 63 or a low pressure line 64; connecting a buffer volume 70 to the low pressure line 64 via a supply valve 72; executing initial cooling for cooling an expander 14 from an initial temperature to a cryogenic temperature in a state where the second compressor 80 and the buffer volume 70 are connected to the cryocooler 10; and executing a steady operation of maintaining the expander 14 at the cryogenic temperature after the initial cooling. The execution of the initial cooling includes supplying a working gas to the expander 14 by using the first compressor 12 and the second compressor 80, and controlling the supply valve 72 to keep a pressure of the high pressure line 63 within a preset appropriate pressure range based on the measured pressure of the high pressure line 63.

Method for operating a heat pump system (2) realized by a control system (22) for air conditioning a vehicle, in particular an electric or hybrid vehicle, wherein - an air conditioning requirement for a passenger compartment (10) of the vehicle is met by automatically setting one of several operating modes (BM) depending on the air conditioning requirement, - the passenger compartment (10) is cooled by means of an air conditioning evaporator (12) if the air conditioning requirement includes a cooling or dehumidifying requirement and / or heated by means of a heating heat exchanger (14) if the air conditioning requirement includes a heating requirement, - the heating heat exchanger (14) is arranged in a heating branch (24) of a coolant circuit (6) and is supplied with heat via a heat pump which has a chiller (46) and a condenser (26), both of which are connected to a refrigeration circuit (4) and wherein the chiller (46) is arranged in a cooling branch (33) of the coolant circuit (6) and the condenser (26) is in the heating branch (24), - in the event of a cooling requirement without an additional heating requirement, the heating branch (24) is opened, the chiller (46) of the heat pump is deactivated and cooling operation is thus achieved, - in the case of a heating demand without an additional cooling demand, the heating branch (24) is closed, heat is supplied to the heating heat exchanger (14) via the condenser (26) of the heat pump, via the cooling branch (33) and / or by heat absorption via the NT cooler (44), and heating operation is thus realized. - wherein, to dissipate heat from the heating branch (24), this is opened and the NT cooler (44), the condenser (26) and the heating heat exchanger (14) are operated in series, - wherein the control system (22) opens and closes the heating branch (24) by means of a shut-off valve (32), wherein to open the heating branch (24) the shut-off valve (32) is opened and to close the heating branch (24) the shut-off valve (32) is closed, - starting from heating operation, a first mixed operation is set up by activating the air conditioning evaporator (12), - where, starting from the first mixed operation, a second mixed operation is set up by reducing the heating output by regulating an expansion valve (48a) which is connected upstream of the chiller (46) in the refrigeration circuit (4), - where, starting from the second mixed operation, a third mixed operation is set up by operating the heating branch (24) in a pulsed manner, - where, starting from the third mixed operation, the cooling operation is stopped by continuously opening the heating branch (24).

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.

A heat pump system with an ejector and three vortex tubes comprises a compressor and an evaporator, an outlet of the compressor is communicated with an inlet of the evaporator through a first pipeline, the inlet of the compressor is communicated with an outlet of the evaporator through a second pipeline, and the heat pump system further comprises a vortex tube set. The first pipeline is further provided with an ejector, an inlet of the vortex tube set is communicated with the second pipeline through a third pipeline, a hot end outlet is communicated with an inlet of the compressor through a fourth pipeline, and a cold end outlet is connected with an injection flow inlet of the ejector through a fifth pipeline. And the second pipeline and the third pipeline are respectively provided with a first control valve and a second control valve. The performance of the heat pump system can be better improved through the temperature separation effect of the vortex tubes, and temperature control during refrigerating and heating is achieved by arranging the vortex tube set and a plurality of control valves; and the multi-cooling function is achieved, namely the evaporator provides low temperature, the cooler provides low temperature, and the working conditions and environments with various temperature requirements are met.

A dual inlet valve for a Gifford-McMahon (GM) type dual inlet pulse tube cryocooler system for providing cooling at cryogenic temperatures, the dual inlet valve including a fixed restrictor and a needle valve coupled in parallel with the fixed restrictor. The needle valve creates an asymmetric flow. The combination of the fixed restrictor and the needle valve with asymmetric flow provides improved alternating current (AC) flow characteristics and tunability of direct current (DC) flow to increase available cooling.

The invention relates to a cooling system (10) for a motor vehicle (200) having an internal combustion engine and / or at least partially electric drive, the cooling system (10) comprising: at least one heat exchanger (12) through which air flows, in particular a low-temperature cooler and / or a gas cooler and / or condenser; and at least one fan device (14) which, in an activated state, is configured to convey air through the at least one heat exchanger (12). Provision is made for the fan device (14) to be arranged outside a heat exchanger surface (WF) with respect to an inflow direction (ER) of air into the heat exchanger (12). Furthermore, a motor vehicle having such a cooling system (10) is described.

The present invention relates to compositions for refrigeration and heat transfer applications (eg, heat transfer fluids). The compositions of the present invention can be used in methods of refrigeration and heating and methods of replacing refrigerants, as well as in refrigeration equipment, air conditioning equipment and heat pump equipment.

A device for transferring liquid helium into an application cryostat comprises a storage dewar, a transfer line with a first transfer line end in the storage dewar and a second transfer line end for insertion into the application cryostat. An apparatus is provided for generating a pressure difference between the storage dewar and the application cryostat. A condensation heat exchanger, cooled by a cryocooler, condenses helium gas to liquid helium for insertion into the application cryostat. A control apparatus, using a measure of gas pressure in the application cryostat provides a control output to the apparatus for generating a pressure difference such that a volume of liquid helium transferred through the transfer line per unit of time is approximately equal to the change in volume of the helium which condenses from helium gas to liquid helium per unit of time at the condensation heat exchanger.