65 results about "Cryogenic system" patented technology

The invention discloses a temperature-variable superconducting magnet low-temperature testing system and method, and relates to the technical field of superconducting magnet low-temperature testing. The system specifically comprises a superconducting magnet circulation loop which is configured to be communicated with a superconducting magnet to be tested to form a closed circulation channel for helium flow; the heat exchanger is arranged in the superconducting magnet circulation loop and is configured to cool helium in the superconducting magnet circulation loop through heat exchange with an external low-temperature medium; the helium circulating pump is arranged in the superconducting magnet circulating loop and is used for driving helium to perform forced flow circulation in the closed-loop circulating channel; the temperature control assembly comprises a heater arranged in the superconducting magnet circulation loop; wherein the flow and the temperature of helium entering the superconducting magnet to be tested are controlled by adjusting the helium circulating pump and the heater. The invention aims to design a test system which does not need an expensive refrigerator, is simple and convenient to operate and can realize accurate control of a wide temperature zone and a forced flow cooling environment.

The invention discloses a real-time online superconducting accelerator low-temperature system construction method and system.The method comprises the steps that physical property calculation in a low-temperature system is simplified, and a simplified physical property function of a working medium in the low-temperature system is obtained; the key point temperature is simulated according to the combination of a one-dimensional pipeline model and a 0-dimensional tank sub-model based on an agent model technology, the one-dimensional pipeline model is used for simulating the delay of heat transfer, and the 0-dimensional tank sub-model is used for simulating heat capacity; and responding to the simplified physical property function and the key point temperature, and solving node parameters in the low-temperature system by adopting a large-scale nonlinear sparse matrix equation. According to the invention, the fast simulator which operates independently can be provided, and meanwhile, the fast simulator can be combined with a real low-temperature system to operate to provide analysis and prediction functions for the real low-temperature system.

Systems and techniques for facilitating scalable cryostats and cryogenic systems are provided. In one embodiment, the cryogenic system (300) may include a plurality of unit cells (304) coupled together, wherein each unit cell includes a trapezoidal frame (704) wherein the frames from adjacent unit cells are vacuum-sealed to form a continuous global vacuum enclosure, and wherein the unit cells are horizontally removable from or inserted into the plurality of coupled unit cells. Furthermore, each unit cell may include at least one temperature housing (508, 510, 512) wherein temperature housings from adjacent unit cells are coupled to form a continuous global temperature housing. Moreover, each unit cell may include at least one cryogenic payload (514) located within at least one temperature housing, which is cooled by at least one modified version of a standard dilution refrigeration unit.

A system and method for transfer of signals between an inside of a cryogenic system and an external environment including at least one optical source (e.g., a laser) for generating optical input signals and at least one fibre for transferring modulated optical signals to the inside of the cryogenic system and receiving optical output signals from the inside of the cryogenic system. A plurality of detectors, located in the external environment, is used for detecting the optical output signals and are connected to the fibre. A plurality of first transducers converts the modulated optical signals to microwave input signals and a plurality of second transducers converts the microwave input signals to optical output signals. A first microwave impedance matching resonator is connected to the plurality of first transducers and a second microwave impedance matching resonator is connected to the plurality of second transducers.

The ultralow-temperature refrigerating system comprises a low-temperature system, a high-temperature system and a compressor, the low-temperature system comprises a low-temperature evaporator and a low-temperature condenser, the high-temperature system comprises a high-temperature evaporator and a high-temperature condenser, and the low-temperature condenser and the high-temperature evaporator are staggered to form an evaporative condenser. Pipe sets of the low-temperature condenser are arranged in a vertical S shape at equal intervals in the left-right direction, and pipe sets of the high-temperature evaporator are arranged in a horizontal S shape at equal intervals in the up-down direction, so that the cold exchange area of the low-temperature condenser and the high-temperature evaporator is increased, and the cold exchange efficiency of the low-temperature condenser and the high-temperature evaporator is improved; in cooperation with the structural design of a heat dissipation air inlet system, an exhaust hole, a condensation bin and the like, a single driving element is adopted for conducting heat dissipation on a compressor and a high-temperature condenser, then the refrigeration efficiency of a low-temperature system and a high-temperature system is improved, and operation energy consumption is reduced.

In a general aspect, a flexible cable communicates electromagnetic signals in a cryogenic system. In some aspects, the flexible cable includes a signal layer and a ground layer. The signal layer includes signal lines embedded in adhesive material. Each signal line includes a multilayer structure. The multilayer structure includes a layer of non-superconducting material and a layer of rhenium metal. The ground layer is laminated to the signal layer.

The invention relates to a compression condensing unit capable of meeting various requirements and a control method thereof. The compression condensing unit comprises a compressor, a condenser, a first expansion valve and a second expansion valve. The first expansion valve and the second expansion valve are connected in parallel to form a throttling assembly. An outlet of the throttling assembly is connected with an inlet of the evaporator arranged in the use space, and an inlet of the throttling assembly is connected with an outlet of the condenser; an exhaust port of the compressor is connected with an inlet of the condenser after passing through the oil separator, and an air suction port of the compressor is connected with an outlet of the evaporator after passing through the gas-liquid separator. Accurate control can be carried out through control methods such as the throttling control module and the compressor control module, the function of different high and low temperature outlet air temperatures or outlet water temperatures of the compression condensing unit is achieved, and the requirements for different target temperatures of use space are met structurally and systematically.

Carbon capture for industrial applications, such as power plants, municipal solid waste facilities, cement production, iron & steel, petrochemicals, desalination and refineries, is disclosed herein. Embodiments employ a cryogenic system and process to capture carbon dioxide, ensuring efficient and effective capture, while also maximizing solvent recovery. This advancement enables a capability to meet the demands of diverse industries with a solution that reduces energy penalties and enhances overall operational efficiency. The approach is scalable, modular, and compact, while minimizing energy consumption.

The invention relates to the technical field of extremely low temperature, in particular to a gas adsorption type rapid cooling system and method for an extremely low temperature system. The system comprises a refrigeration mechanism, the refrigeration mechanism comprises a refrigeration unit, and the gas adsorption type rapid cooling system for the extremely low temperature system further comprises an inner shell arranged outside the refrigeration unit in a covering mode, a middle shell arranged outside the inner shell in a covering mode and an adsorber arranged in the inner shell. The adsorber is internally provided with activated carbon or an MOFs (Metal-Organic Frameworks) adsorption material; liquid helium is arranged between the inner shell and the middle shell, and the inner shell is filled with helium with the pressure ranging from 0.1 Pa to 10 Pa. The cooling time of the ultra-low-temperature refrigerating system is shortened by more than half compared with that of a traditional cooling method, and meanwhile extra heat leakage is not caused at the ultra-low temperature.

The utility model discloses a multifunctional power measuring environment test chamber, which comprises a first test chamber, a second test chamber, a partition door, a vehicle access gate, an underground space, a power measuring platform, a dynamometer assembly, an illumination assembly and a large fan, a pump room is further arranged outside the first test cabin and the second test cabin, industrial refrigeration equipment and industrial heating equipment are arranged in the pump room, and pipeline systems connected with the industrial refrigeration equipment and the industrial heating equipment are arranged on the first test cabin and the second test cabin respectively. Through the arrangement of the high and low temperature system, the illumination, the fan and the dynamometer assembly, the multifunctional dynamometer environment test chamber not only has the test capabilities of high temperature, low temperature, damp heat and temperature shock, but also has the dynamometer test function under the environments of wind test simulation, solar thermal effect and the like.

This invention provides a scroll compressor refrigeration system for low-temperature energy efficiency improvement and stable operation under low load, relating to the field of low-temperature refrigeration technology. In the scroll compressor refrigeration system provided by this invention, the condensed liquid refrigerant enters a gas-liquid separator with a regenerative function, completing the first subcooling. This improves system energy efficiency and also increases system superheat, significantly reducing the risk of liquid return. Furthermore, the increased superheat of the return gas facilitates the return of refrigeration oil accumulated in the gas-liquid separator to the compressor oil sump for lubrication via the system return gas pipe, thereby improving the reliability of lubrication in the low-temperature system. Simultaneously, the combined use of a balance bypass expansion valve and a one-way valve allows for rapid balancing of the high and low pressures of the refrigeration system, preventing the compressor from starting under pressure.

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 invention discloses a mechanical liquid level and pressure cooperative control device for an immersed liquid hydrogen pump, which comprises a first valve and a second valve which are sequentially arranged and connected in series on a gas phase exhaust pipeline of a liquid pool along the exhaust direction, an exhaust channel of the first valve is opened or closed according to the liquid level height in the liquid pool, and the second valve is opened or closed according to the liquid level height in the liquid pool. An exhaust channel of the second valve is opened or closed according to the gas phase pressure of the liquid pool; the first valve and the second valve are both self-operated control valves, an exhaust channel of the first valve is opened only when the liquid level height in the liquid pool is not higher than a set liquid level threshold value, and an exhaust channel of the second valve is opened only when the gas phase pressure of the liquid pool is not lower than a set pressure threshold value. A passive and intrinsically safe pure mechanical structure is adopted, the low-liquid-level working condition of a liquid pool of the liquid hydrogen pump can be intelligently recognized, and under the working condition, pressure compensation is conducted through the characteristics of a profound hypothermia system to stabilize the NPSH of the pump, so that the reliability and safety of operation of the control device and the liquid hydrogen pump are effectively guaranteed.

The utility model relates to the field of refrigerating systems, and discloses a Freon / carbon dioxide cascade skid unit which comprises a high-temperature system and a low-temperature system, and the high-temperature system comprises a Freon screw compressor unit skid and a U-Turn type gas-liquid separation condensation evaporation unit skid. The low-temperature system comprises a carbon dioxide piston compressor unit skid and a carbon dioxide barrel pump unit skid, the carbon dioxide piston compressor unit skid and the Freon screw compressor unit skid are arranged in parallel, the unit skid is divided into an upper layer and a lower layer, and a carbon dioxide piston compressor is located at the upper end of the Freon screw compressor. The U-Turn type gas-liquid separation condensation evaporation unit skid is arranged in the width direction of the upper-layer carbon dioxide piston compressor, and the carbon dioxide barrel pump unit skid is arranged at the position close to the tail end evaporator and arranged in the length direction of the Freon screw compressor.

The present application relates to a kind of vehicle expansion water tank, for closed tank structure, tank structure upper left, right two sides are equipped with 2 gas return interfaces respectively, tank structure lower part is equipped with 1 water supplement pipe, 2 gas return interfaces are connected high temperature system and low temperature system respectively;Tank structure top is equipped with pressure cover;Pressure cover inner middle part is equipped with valve core, spring is arranged in it, and convex structure is arranged on plastic part, for isolating the liquid returned by two gas return interfaces;Valve core outside is equipped with two sealing rings;When pressure cover is covered on tank structure, pressure cover will block two gas return interfaces completely, prevent coolant mixing.The vehicle expansion water tank of the present application adopts unique design structure, realizes when pressure cover is unscrewed, gas return pipe is unobstructed, after pressure cover is covered, gas return pipe is blocked;Unlike the structure of one sealing ring of general expansion water tank, two sealing rings are designed on pressure cover;Gas return pipe waterway is located in two sealing rings, and water flow is blocked after pressure cover is covered.

This invention relates to a gas filling platform for cavity-containing devices in a helium cryogenic system, comprising an integrated gas filling device, a helium recovery system connected to the integrated gas filling device, the cavity-containing device in the helium cryogenic system, and a high-purity helium storage device. The integrated gas filling device includes a low-pressure pipeline for gas supply and internal leakage detection of pipeline valves, a high-pressure pipeline for external leakage detection of pipelines, an extraction pipeline for evacuating the cavity-containing device, and a detection pipeline for analyzing the purity of helium in the cavity-containing device. The low-pressure pipeline, high-pressure pipeline, and detection pipeline are arranged independently and in parallel, and all three are connected to the extraction pipeline. Furthermore, the low-pressure pipeline, high-pressure pipeline, extraction pipeline, and detection pipeline are integrated into a box-type mobile vehicle. This invention also relates to a gas filling method for cavity-containing devices in a helium cryogenic system. This invention combines the advantages of being mobile, recoverable, and capable of online detection, significantly improving on-site gas filling efficiency and system operational reliability.

The application provides a controllable nuclear fusion helium cryogenic system coupled with liquid air energy storage, belonging to the cross field of controllable nuclear fusion device cryogenic technology and large-scale energy storage technology, comprising an energy storage subsystem, an energy release subsystem, an 80K helium gas circulation subsystem, a cooling oil subsystem and a cold supplementing subsystem; the energy storage subsystem is used for liquefying ambient air and storing the ambient air in a liquid air storage tank, and shares multiple heat exchangers with the 80K helium gas circulation subsystem; the energy release subsystem takes liquid from the liquid air storage tank and exchanges heat with the 80K helium gas circulation subsystem; the 80K helium gas circulation subsystem drives helium gas through a cold compressor to ensure continuous cooling of a superconducting magnet cold shield; the cooling oil subsystem is used for cooling compressed air of the energy storage subsystem; and the cold supplementing subsystem is a closed inverse Brayton cycle, and cold energy of the cold supplementing subsystem is used for re-liquefying main air flow to compensate for system cold energy loss. The application provides a passive cold energy backup structure for the 80K cryogenic system, which does not depend on power grid power supply.

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.

The present disclosure relates to a thermal coupling device (200), comprising a body (210) configured to provide a thermal interface between a cryogenic material (20) and a thermal bus, the body (210) having an interface surface (IFS) configured to establish thermal contact between the body (210) and the cryogenic material (20).

The application provides a cascade heat pump system suitable for low-temperature environment, which comprises a low-temperature system, a high-temperature system and a hot water circulating system; wherein the low-temperature system comprises a low-temperature gas-liquid separator, a low-temperature compressor, a low-temperature oil separator, a low-temperature heat exchanger, a heat exchange condenser, a low-temperature liquid accumulator, a low-temperature throttling expansion valve and an evaporation condenser; the high-temperature system comprises a high-temperature gas-liquid separator, a high-temperature compressor, a high-temperature oil separator, a high-temperature heat exchange condenser, a high-temperature liquid accumulator, a high-temperature throttling expansion valve and a heat exchange condenser; and the hot water circulating system comprises a cold and hot water tank, a circulating water pump, a low-temperature heat exchanger and a high-temperature heat exchange condenser; the application adopts a double-refrigerant cascade circulation framework, can stably provide hot water through the cooperation of the low-temperature system and the high-temperature system when the outdoor temperature is extremely low, and can grade heat the hot water without greatly increasing the compression ratio of the compressor for maintaining the temperature of the hot water, thereby effectively avoiding the defects of energy consumption rising and heating capacity greatly decreasing.

The invention discloses a partitioned cold shield assembly for a vacuum chamber of a star simulator and a vacuum chamber cold shield, and belongs to the technical field of magnetic confinement nuclear fusion equipment. The vacuum chamber comprises a vacuum chamber body, a block type cooling assembly is arranged on the outer wall of the vacuum chamber body, the block type cooling assembly comprises a plurality of cooling blocks, each cooling block comprises a cooling panel, grooves are formed in the outer walls of the cooling panels, and a plurality of snake-shaped cooling pipelines are fixedly connected to the inner walls of the grooves; mLI heat insulation material layers are laid between the opposite sides of the multiple cooling panels and the vacuum chamber body, through the evenly-arranged S-shaped cooling pipelines, all-around even heat exchange can be achieved, heat is guided to be directionally transmitted along a preset efficient path, and therefore radiant heat is rapidly removed, the overall heat shielding efficiency is effectively improved, and the service life of the vacuum chamber is prolonged. The operation load of a low-temperature system is reduced, meanwhile, the local flow dead zone or short circuit phenomenon is eliminated, and the consistency and reliability of the cooling strength of the surface of the whole annular cold shield are ensured.

The invention discloses an integrated superconducting aviation electric propulsion system, which belongs to the technical field of aviation electric propulsion and comprises a liquid hydrogen storage tank, a hydrogen supply balance module, a superconducting motor controller, a superconducting motor and a hydrogen fuel cell module. A power supply circuit assembly is arranged between the hydrogen fuel cell module and the superconducting motor, a liquid hydrogen flow path assembly is arranged between the liquid hydrogen storage tank and the superconducting motor, a hydrogen flow path assembly is arranged between the superconducting motor and the hydrogen supply balance module, and a fuel supply assembly is arranged between the hydrogen supply balance module and the hydrogen fuel cell module. And the hydrogen fuel cell module is also connected with an air supply assembly. According to the integrated superconductive aviation electric propulsion system, the cooling cost and complexity of the superconductive aviation electric propulsion system are reduced, the structure of a low-temperature system is simplified, and the problem of efficiency loss caused by separation design of an airborne liquid hydrogen energy system and a thermal management system is solved.

The invention discloses a method and a device for detecting heat transfer capacity by using a temperature measuring element, and belongs to the technical field of low-temperature heat transfer test.The method comprises the following steps: detecting steady-state temperature distribution in a to-be-detected state by using the temperature measuring element for a to-be-detected object; a cold source and a controllable heating element are utilized to act on the two ends of an object to be detected respectively, so that the steady-state temperature distribution of the object to be detected is consistent with the steady-state temperature distribution in a to-be-detected state, and the input power of the controllable heating element at the moment is read, namely the steady-state heat transfer amount of the object to be detected in the to-be-detected state. The use of dangerous media such as liquid hydrogen or liquid oxygen can be avoided, and the safety risk of low-temperature testing is solved; the heat transfer amount is directly obtained through an isothermal compensation mechanism, and the error of a heat transfer amount result fitted through temperature difference is eliminated; and multi-temperature-zone test can be realized, and full-temperature-zone measurement at low temperature is supported. The device can be widely applied to accurate testing of thermal performance of low-temperature systems in the fields of superconduction, spaceflight and the like.

The application relates to the field of Mossbauer spectrum devices, and discloses an ultrahigh-temperature and ultralow-temperature high-pressure in-situ reaction cell test device, which comprises a detection chamber used for detecting a sample and comprising a sample cavity used for containing the sample; a vacuum system used for ensuring vacuum isolation heat conduction and comprising a vacuum chamber arranged outside the detection chamber and a vacuum pump group used for keeping the vacuum degree in the vacuum chamber; and a temperature control system used for controlling the temperature at the sample cavity, so as to realize sample detection under an ultrahigh-temperature and ultralow-temperature high-pressure environment and comprising a refrigeration module and a heating module. The three functional systems are integrated together by arranging a high-temperature furnace system, a sample ultralow-temperature system and a high-pressure system into the device, the switching among the three single systems in the previous test process can be omitted, the contact between the sample and air is avoided, and the temperature control change is more continuous and stable.

The utility model discloses a dry-type closed-cycle cryogenic system adaptive to a pulse paramagnetic resonance spectrometer. The dry-type closed-cycle cryogenic system comprises a liquefier assembly, a low-loss infusion tube assembly, a cryostat module assembly, a pulse probe and a circulating gas circuit assembly. According to the dry-type closed-cycle low-temperature system adaptive to the pulse paramagnetic resonance spectrometer, liquid helium used for reducing ultralow temperature and ultralow vibration is provided, the temperature of a low-temperature experiment environment is as low as 2.5 k, the vibration is smaller than 20 nm, a special structure that a GM refrigerating machine is externally arranged and helium circulation is utilized is adopted, the experiment conditions of ultralow temperature and ultralow vibration are achieved, and the experiment efficiency is improved. The low-temperature thermostat is connected through the low-loss infusion tube, the low-loss infusion tube is fixed through the fixing frame, at the moment, vibration transmitted by the liquefier part is filtered, and therefore the effect of ultralow vibration is achieved.

A cryogenic system includes a cryogenic tank containing a liquid cryogen, a vacuum vessel surrounding the cryogenic tank and providing a vacuum space between an inner surface of the vacuum vessel and an outer surface of the cryogenic tank. The cryogenic system further includes a suspension system disposed within the vacuum space to support the cryogenic tank within the vacuum vessel and to maintain the cryogenic tank in a desired position within the vacuum vessel. The suspension system includes a plurality of roller elements disposed within the vacuum space and contacting the inner surface of the vacuum vessel and the outer surface of the cryogenic tank.

The invention relates to the technical field of magnetic material characterization and synchrotron radiation X-ray measurement, and discloses a synchrotron radiation device and method for measuring surface and bulk phase GHz spin precession of a magnetic material, and the synchrotron radiation device comprises a cold rod main body and a replaceable signal detection front end; a microwave transmission line, a plurality of paths of electrical signal lines and a liquid nitrogen flow channel are integrated in the cold rod main body; a standardized interface is arranged at the tail end of the cold rod main body; and the signal detection front end is detachably connected with the cold rod main body through the standardized interface to form a complete detection unit. According to the invention, in-situ multi-mode detection is realized by adopting a modular design, under the same low-temperature system and microwave excitation condition, spin precession signals sensitive to the surface and the body phase can be respectively or even simultaneously obtained only by replacing the front-end module, and inconvenience and errors caused by replacement of different devices in a traditional method are avoided.

The invention provides a low-temperature system, relates to the technical field of gas purification, and is used for obtaining ultra-high-purity helium-4. The low-temperature system comprises a refrigerator, a heat exchanger assembly, a superfluid helium cavity, a pressure reduction assembly and an entropy filter assembly, the refrigerator is connected with the heat exchanger assembly, the heat exchanger assembly is connected with the pressure reduction assembly, the pressure reduction assembly is connected with the superfluid helium cavity, the superfluid helium cavity is connected with the entropy filter assembly, and the entropy filter assembly is used for obtaining ultra-pure helium-4. Cooling capacity can be provided for a low-temperature system through the refrigerating machine, helium at the room temperature can be liquefied through the heat exchanger assembly, then under the action of the pressure reduction assembly, liquid helium can flow into the superfluid helium cavity to become superfluid helium, under the filtering action of the entropy filter assembly, helium-4 can flow through the entropy filter assembly, and helium-3 cannot flow through the entropy filter assembly. Therefore, the low-temperature system can improve the helium-4 purity by two orders of magnitude.

The invention provides an air exhaust limiter structure for a star imitator device and the star imitator device, and relates to the field of magnetic confinement plasma devices.The air exhaust limiter structure comprises a limiter component which is arranged in a vacuum chamber and is close to a plasma boundary position; the getter pump module is arranged on the side, back to the plasma, of the limiter component, communicates with the limiter area through an air exhaust channel and is used for conducting non-flow type adsorption capture on neutral gas entering from the boundary of the plasma; according to the scheme, the getter pump module is integrated nearby the limiter component in a compact and modular mode, local air exhaust close to a particle source is achieved, the structure does not depend on a liquid helium or liquid nitrogen pipeline, a cold shield and other low-temperature systems as main air exhaust means, operation and maintenance are simplified, the long-term steady-state operation requirement of a star imitator device is met, and the structure is simple. The method has potential engineering adaptability in tritium-related application scenarios and in the presence of neutron irradiation devices.