72 results about "Cryocooler" patented technology

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 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.

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.

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 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 application relates to a high-reliability cryocooler micro-vibration insulation system and belongs to the technical field of satellites; a support Dewar is installed on the upper surface of a cold finger flange; a coupling substrate is placed on the top of the support Dewar; the top end of a support column is connected with the coupling substrate, and the bottom end is connected with the cold finger flange; a pyrotechnic cutter and a conductive sensor are arranged on the support column; a detector Dewar cover is installed on the coupling substrate; a splicing substrate is installed on the coupling substrate; a detector device is installed on the splicing substrate; a cryocooler cold head extends into the inner cavity of the support Dewar from the bottom of the cold finger flange; a flexible cold chain is arranged on the top of the cryocooler cold head and is connected with the coupling substrate; a vacuum pump is in communication with the detector Dewar; a water cooler is in communication with the cold finger flange; the application can not only guarantee that the launch section effectively supports the detector assembly but also guarantee that the support end and the detector assembly are physically isolated during the in-orbit period, so that the micro-vibration generated by the cryocooler during in-orbit work is insulated from the detector.

To provide a cryogenic cooling system.SOLUTION: Wherein the cryogenic cooling system comprises a working area, a first cryocooler having a first cooling stage, a first conduit for passing a flow of a fluid cooling medium towards the working area, at least one thermal coupling of the first conduit and the first cooling stage for cooling the fluid cooling medium on its way to the working area, a second cryocooler having a second cooling stage, a first cold stage, at least one thermal coupling of the second cooling stage and the first cold stage for cooling the first cold stage, and a first thermal coupling of the first cooling stage and the first cold stage provided by a coupling element for cooling the first cold stage, the coupling element comprises a controlled thermal coupling for reducing the first thermal coupling when an associated temperature of the cryogenic cooling system is below a threshold temperature.SELECTED DRAWING: Figure 1

Processes and systems arc 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.

Displacer assembly for a cryo-cooler comprising: a displacer body to be movably arranged in a housing of a displacer, a rod to transfer a moment of a motor to the displacer body, wherein the rod is connected to the displacer body by a hinged connection.

The invention discloses a rotary integrated Stirling cryocooler press sealing structure, which relates to the Stirling cryocooler technology, and comprises a press end cover (1), a first structural groove is formed in the sealing surface of the press end cover (1); the press end cover (1) and the crankcase (2) are connected and installed, the face, connected and installed with the press end cover (1), of the crankcase (2) is a sealing face, and the sealing face of the crankcase (2) is provided with a second structural groove; and the metal sealing wire (7) is arranged between the first structure groove and the second structure groove, and the metal sealing wire (7) extends and deforms under the action of pretightening force in the installation process of the press end cover (1) so as to achieve sealing. According to the sealing structure, the sealing reliability can be greatly improved, and the problem of sealing failure caused by bending deformation after the press end cover is fastened in an existing sealing structure is solved.

The invention relates to a cryogenic system and a magnetic resonance apparatus. The invention relates to a cryogenic system for a magnetic resonance apparatus, the cryogenic system comprising a magnet arrangement comprising at least one superconducting magnet, a first cryogenic cooler thermally connected to the at least one superconducting magnet, a switching device, and a second cryogenic cooler configured to cool components of the magnet arrangement according to the switching device, the switching device is configured to enable cooling of the component of the magnet device via the second cryocooler when the temperature of the component of the magnet device exceeds a predefined temperature level, and to disable cooling of the component of the magnet device via the second cryocooler when the temperature of the component of the magnet device is below the predefined temperature level. The invention also relates to a magnetic resonance apparatus comprising the cryogenic system of the invention.

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.

To improve silence of a gas-driven cryogenic refrigerator.SOLUTION: A gas-driven cryocooler (10) capable of performing initial cooling for cooling from an initial temperature to a cryogenic temperature and a steady operation for maintaining the cryogenic temperature following the initial cooling is provided. The cryocooler 10 includes the compressor 12, the cold head 14, and the flow rate restrictor 100 that is connected between the compressor 12 and the cold head 14 and operates to restrict the flow rate of the working gas to the cold head 14 during the initial cooling as compared with the steady operation.SELECTED DRAWING: Figure 1

A superconducting machine system includes a superconducting electrical machine. The superconducting machine system also includes a cryogenic vessel. The cryogenic vessel encompasses the superconducting electrical machine. The superconducting machine system further includes a vacuum vessel wall encompassing the cryogenic vessel. The superconducting machine system even further includes a cryocooler coupled to the vacuum vessel wall, wherein the cryocooler is configured to cool the superconducting electrical machine. The superconducting machine system still further includes a system configured, when the cryocooler is switched to a non-operative state, to remove helium gas from within a cryocooler housing to reduce a helium gas pressure within the cryocooler to minimize a parasitic heat load generated when the cryocooler is switched from an operative state to the non-operative state.

The invention relates to an alternating heat exchanger for cryogenic coolers, which utilizes helium as working gas and heat storage medium, having at least one cell with a cell wall enclosing a cavity having a plurality of partial cavities. The partial cavities are connected to one another by at least one connecting channel and are completely enclosed by the cell wall, with the exception of the at least one connecting channel leading to the other partial cavities. The cavity of the at least one cell is filled with helium as heat storage material. In addition, the alternating heat exchanger has a flow channel for the working gas helium, which is constructed between the individual partial cavities, and a pressure equalization hole in the form of a capillary, which penetrates the cell wall and constitutes a permanently open connection between the working gas helium outside the cavity and the heat storage material helium inside the cavity. The partial cavities have support elements inside them, which support the cell walls delimiting a partial cavity with respect to one another.

The superconducting machine includes a vacuum vessel, at least one superconducting coil disposed within the vacuum vessel, and a cooling system for cooling the at least one superconducting coil. The cooling system includes a torque transmission component fixed to an inner wall of the vacuum vessel, and the at least one superconducting coil is fixed to the torque transmission component. The cooling system also includes a cryocooler outside the vacuum vessel, the cryocooler including a forced-flow cooling system. The cooling system also includes at least two cooling pipes for supplying and recovering a cryogen, the at least two cooling pipes being thermally coupled between the cryocooler and the at least one superconducting coil. By operating the cooling system, the cryocooler supplies a cryogen to the at least one superconducting coil via the at least two cooling pipes.

A seal assembly for a cryo-cooler displacer has a first ring 12 and at least one separate second ring 14, an axial surface of the first ring 12 in direct contact with an axial surface of the second ri

The invention relates to an apparatus and a method for transferring liquid helium to an application cryostat, the apparatus comprising: a storage reservoir; a transfer line comprising a first transfer line end in the storage reservoir and a second transfer line end for insertion into the application cryostat; means for generating a pressure difference between the storage reservoir and the application cryostat; a condensation heat exchanger for condensing helium gas into liquid helium; a cryocooler for cooling the condensation heat exchanger; and a control device having a measurement input for a pressure sensor and a control output for the means, the control device being programmed to control the means such that the volume of liquid helium transferred through the transfer line per unit of time is approximately equal to the change in volume of helium condensed from helium gas into liquid helium at the condensation heat exchanger per unit of time. With this apparatus, the helium loss when transferring liquid helium is minimized in a simple manner.

Displacer assembly for a cryo-cooler comprises a displacer body 10 movable in a housing 23 of a displacer; a rod 22 transferring movement of a motor 14 to the displacer body; and wherein the rod is co

An object is to extend a replacement lifetime of a cryocooler and reduce a replacement frequency of the cryocooler, thereby improving an operating rate of an MRI apparatus.A cold head lifetime extension mode is executed. In the cold head lifetime extension mode, a displacer of a cryocooler is driven at a constant frequency that is lower than a predetermined upper limit frequency regardless of a temperature of a superconducting coil, and a drive frequency of a compressor drive unit adjusted by an inverter for a compressor is controlled in accordance with the temperature of the superconducting coil.

The present invention relates to the field of cryogenic refrigeration technology, and particularly to a cold storage material for a cryogenic refrigerator, its cold storage device and refrigerator. The cold storage material is composed of Er a Pr b alloy, where a and b are atomic percentages, and 40 < a < 80, and the alloy does not contain lead. The cold storage device is filled with the above-mentioned Er a Pr b alloy as its entire cold storage material. The cryogenic refrigerator is equipped with the above-mentioned cold storage device. The purpose of the present invention is to solve the environmental and human health hazard problems caused by the use of lead in the existing cold storage materials for cryogenic refrigerators, and to achieve the technical effects of meeting the requirements of ROHS regulations and improving the refrigeration power.

The invention provides a waste heat recovery low-pressure steam system and process for a lithium carbonate rotary cooling kiln, and belongs to the technical field of waste heat recovery. A high-temperature cooling section close to one side of a kiln head and a low-temperature cooling section close to one side of a kiln tail are arranged in a kiln body, and the internal caliber of the high-temperature cooling section is larger than that of the low-temperature cooling section; the water cooling assembly comprises a high-temperature cooler set in the high-temperature cooling section and a low-temperature cooler set in the low-temperature cooling section. The air cooling assembly comprises a fan and a gas-liquid heat exchanger and is used for circulating heat exchange in the kiln; and a gas-liquid heat exchanger is connected between the high-temperature cooler group and the low-temperature cooler group. The waste heat recovery low-pressure steam system and the waste heat recovery low-pressure steam process are high in cooling efficiency, energy-saving, environment-friendly and capable of running stably, the lithium carbonate production energy efficiency can be effectively improved, and green transformation of the industry is promoted.

A heating rod, comprising: a first cylindrical body portion and a second cylindrical body portion, a first heating strip arranged inside the first cylindrical body portion, and a second heating strip arranged inside the second cylindrical body portion. The first cylindrical body portion and the second cylindrical body portion, which match the shape of a cryocooler cylinder, respectively heat a first cylinder portion and a second cylinder portion by means of the first heating strip and the second heating strip.

The present invention discloses a hydrogen or helium throttling liquefaction system using direct current (DC) flow from the cold and hot ends of the regenerative cryocoolers, which belongs to the technical field of refrigeration and cryogenics. It includes a regenerative cryocooler module, a hot-end DC flow module, a cold-end DC flow module, a throttling liquefaction module, and a gas-phase circulation module. The modules are interconnected to form a closed loop for the flow of hydrogen or helium working fluid. DC flow is introduced from the cold and hot ends of the regenerative cryocooler through the DC flow pipelines and DC flow valves. The hot-end DC flow exchanges heat with the reflowing low-temperature working fluid and is cooled down. After that, it mixes with the cold-end DC flow and enters the throttling liquefaction module to generate liquid phase through throttling and liquefaction. After the liquid phase has output cooling capacity, it flows through the gas-phase circulation module and then enters the back-pressure chamber of the compressor to complete the cycle. Compared with the existing small-scale hydrogen and helium liquefaction technology using regenerative cryocoolers, the present invention has the advantages of simple structure, easy installation, high heat transfer efficiency and liquefaction efficiency of the system.

Methods and systems for bolted joint conduction cooling of accelerator cavities comprises a conduction cooling system. The conduction cooling system comprises mounting at least one cooling ring to a cavity and a conduction link joined to the cooling ring with at least one connection assembly. The materials in the at least one connection assembly can be selected to experience greater thermal contraction than the cooling ring and the conduction link when cooled. A fast conduction cooling system can comprise a cryocooler in thermal communication with a conduction cooling apparatus affixed to a cavity via a conduction path and a thermal switch in the conduction path between the cryocooler and the conduction cooling apparatus wherein a thermal conductance of the thermal switch decreases as a function of temperature.