177 results about "Cryogenic system" patented technology

The invention relates to the field of system simulation, in particular to a semi-hardware dynamic simulation platform of a thermal load of a low-temperature system and a data interaction method of the semi-hardware dynamic simulation platform, which comprise a simulation model of the thermal load of the low-temperature system, a control system model of the thermal load of the low-temperature system and a method for carrying out data interaction on the simulation model and the control system model. According to the semi-hardware dynamic simulation platform for the thermal load of the low-temperature system, the thermodynamic performance of the thermal load of the low-temperature system can be known in advance, the dynamic thermal load of the thermal load of the low-temperature system is simulated, control program pre-verification is carried out, main control logic of the thermal load of the low-temperature system is debugged, and performance estimation of the thermal load of the low-temperature system in different working modes is carried out.

The invention discloses a method for semi-continuously preparing electronic-grade hydrogen chloride in the field of electronic gas preparation, which comprises the following steps: (1) introducing industrial hydrogen chloride into an adsorption system after the moisture content of the industrial hydrogen chloride is lower than 50ppm by using a cryogenic system; (2) deeply removing trace moisture in the hydrogen chloride by using an adsorption system, and introducing the hydrogen chloride into a filtering system after the moisture content in the hydrogen chloride is lower than 1ppm; (3) removing the pulverized adsorbent entrained in the anhydrous hydrogen chloride gas by using a filtering system, and then introducing the anhydrous hydrogen chloride gas into a feeding tank of a rectifying tower; (4) introducing anhydrous hydrogen chloride in the feeding tank of the rectifying tower into a heavy component removal tower, removing high-boiling-point impurities from a tower kettle, and introducing a tower top material into a light component removal tower; and (5) continuously emptying the top of the light component removal tower to remove light boiling point impurities, and opening an extraction valve and filling when the purity of the tower kettle material hydrogen chloride is more than 99.9995%. According to the method, equipment corrosion is reduced, the influence of light-component impurities on the product is avoided, the product quality is stable, and the yield and the market competitiveness are improved.

Systems and techniques that facilitate scalable cryostats and cryogenic systems are provided. In an embodiment, a cryogenic system can comprise a plurality of unit cells joined together, wherein each unit cell comprises: a trapezoidal-shaped frame, wherein frames from adjacent unit cells are connected in a vacuum-tight manner to form a continuous, global vacuum enclosure, and wherein the unit cells are capable of being horizontally removed from or inserted into the plurality of joined unit cells. Furthermore, each unit cell can comprise at least one temperature shell, wherein temperature shells from adjacent unit cells are connected to form a continuous, global temperature shell. Moreover, each unit cell can comprise at least one cryogenic payload located within the at least one temperature shell, that is cooled by at least one retrofitted version of a standard dilution refrigerator.

The invention relates to the field of system simulation, in particular to an operation training system for a thermal load of a low-temperature system and a data interaction method thereof, which comprise a simulation model for the thermal load of the low-temperature system, a control system model for the thermal load of the low-temperature system and a method for performing data interaction between the simulation model and the control system model. The operation training system for the thermal load of the low-temperature system can know the thermodynamic performance of the thermal load of the low-temperature system in advance, simulate the dynamic thermal load of the thermal load of the low-temperature system, perform control program pre-verification, debug the main control logic of the thermal load of the low-temperature system, and perform performance pre-estimation of the thermal load of the low-temperature system in different working modes.

A modular distributed cryogenic distribution system, comprising: a common chamber housing cryogenic fluid conduits; and a plurality of cryochambers connected to the common chamber. A method of operating a modular distributed cryogenic distribution system comprising a common chamber housing cryogenic fluid conduits, and plural cryochambers connected to the common chamber, includes raising one the plurality of cryochambers room temperature while a second one of the plurality of cryochambers operates at a cryogenic temperature.

The disclosure describes various aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum. More specifically, the disclosure describes a cryogenic vacuum system replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system is designed to ensure that all paths from outgassing materials to the control volume, including multiple bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can therefore be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and the isolated along with the cryogenic system via soft vacuum bellows.

A superconducting magnet system includes a coil support structure having a body, a superconducting magnet having a plurality of coils disposed about the body, and a helium vessel encompassing the coil support structure and the superconducting magnet. The superconducting magnet system includes a cooling system that includes a network of tubes disposed within the helium vessel and configured to transport helium within, wherein the network of tubes is retroactively thermally coupled to the plurality of coils. The cooling system includes a liquid helium storage system located within the helium vessel and a helium recondenser located outside the helium vessel. The cooling system includes one or more tubes coupling the helium storage system to the helium recondenser, wherein where the one or more tubes pass through the helium vessel is retroactively vacuum sealed to make the helium vessel a sealed helium vessel.

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.

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.

The invention relates to the technical field of low-temperature system integration, in particular to a helium liquefaction and recondensation chip test low-temperature system which comprises a liquid helium test cavity, a pulse tube refrigerating machine and a helium tank, the pulse tube refrigerating machine comprises a refrigerating machine compressor, a refrigerating machine cold head and a refrigerating machine cold screen, and the refrigerating machine cold head is connected with a condensation heat exchanger. The liquid helium testing cavity and the condensing heat exchanger are located in the refrigerating machine cold screen, the refrigerating machine cold head is communicated with the liquid helium testing cavity through a cold helium return pipeline, and the condensing heat exchanger is communicated with the liquid helium testing cavity through a liquid helium return pipeline. The helium tank is connected with the refrigerator cold head through a pipeline. The liquid helium testing cavity is used for containing liquid helium to provide a soaking testing environment, the problem of electromagnetic interference is avoided, cold helium evaporated in the liquid helium testing cavity flows back into the liquid helium testing cavity from the liquid helium backflow pipeline after being condensed through the condensation heat exchanger, and zero evaporation of the liquid helium in the superconducting chip testing process is achieved. And long-term test requirements of large-scale superconducting chips can be met.

The utility model relates to an adsorption and desorption and liquid nitrogen cryogenic system for oil gas recovery treatment, which comprises a shallow cooling unit, an adsorption and desorption unit and a liquid nitrogen cryogenic recovery unit, the shallow cooling unit is used for primarily cooling oil gas to separate a gas phase and a liquid phase, and the separated gas phase enters the adsorption and desorption unit through a fan to remove VOCs (Volatile Organic Compounds); and then the residual gas enters the liquid nitrogen cryogenic recovery unit through an extraction pump to obtain a residual liquid phase. Liquid nitrogen is used for deep cooling, so that energy consumption of the device is greatly reduced, the using amount of the liquid nitrogen can be adjusted according to the actual temperature requirement, nitrogen obtained after the liquid nitrogen is gasified is not polluted and has certain pressure, and the nitrogen passes through the nitrogen storage tank, then is adjusted to be slightly higher than the pressure of the nitrogen pipe network through the valve group and enters the nitrogen pipe network of the tank field to be recycled; the device is used for nitrogen sealing and purging of a storage tank, nitrogen purging and vacuum breaking of an adsorption and desorption unit of the system and the like.

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.

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.

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.

The invention provides a cryogenic system and a vacuum processing method, which can improve the maintaining precision of the exhaust speed in a cryopump. The height of the heat shield (11) is a first height (H11). Among the regions defined by the heat shield case (11) and the baffle (13), a region extending from the opening (11A) of the heat shield case (11) to 1 / 2 of the first height (H11) is a temperature adjustment region (10S). At least one of a portion of the heat shield (11) included in the temperature adjustment region (10S) and the baffle (13) is a portion to be heated. A cryogenic system (1) is provided with: a temperature sensor (15) positioned within a temperature adjustment region (10S); a heating unit (16) that heats the portion to be heated; and a control unit (20) that controls the driving of the heating unit (16). The control unit (20) controls the driving of the heating unit (16) on the basis of the value detected by the temperature sensor (15) so that the temperature of the shutter (13) becomes a prescribed value.

The application discloses a superconducting motor rotor and a motor rotor low-temperature system. The superconducting motor rotor comprises an outer frame, a support framework, a superconducting magnet and an intermediate shaft. The inner part of the outer frame is formed with a vacuum cavity, the support framework is located in the vacuum cavity, the superconducting magnet is connected to the support framework, and the intermediate shaft is fixedly connected to the outer frame and located on the inner side of the support framework, thereby forming a rotor structure of the superconducting motor. The cooling assembly can realize the cooling of the superconducting magnet by cooling the support framework, so that the rotor is in a low-temperature environment. Since the intermediate shaft is internally provided with a mounting cavity, the mounting cavity can be used for mounting the low-temperature assembly of the cooling rotor. The low-temperature assembly is mounted in the inner part of the rotor, so that the land area of the external low-temperature system component can be effectively reduced. The vacuum cavity formed in the inner part of the outer frame can be heat-insulated, thereby creating a good low-temperature environment for the rotor.

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 invention discloses a non-contact current compensation method for a high-temperature superconducting electric suspension magnet. The non-contact current compensation method specifically comprises the steps that zero-flux suspension coils are installed on a ground track at equal intervals in the train running direction; the low-temperature system is composed of an outer Dewar, a radiation screen and a refrigerating machine. The vehicle-mounted superconducting magnet is directly conducted and cooled through a refrigerating machine, and the vehicle-mounted power generation coil and the vehicle-mounted excitation coil are installed on the outer side and the inner side of the outer Dewar respectively. The surface of the radiation screen is provided with a high-temperature superconducting tape, and two ends are connected with a vehicle-mounted superconducting magnet to form a closed loop. When a train runs, the vehicle-mounted superconducting magnet induces current in the suspension coil, the vehicle-mounted power generation coil generates power by using a harmonic magnetic field of the suspension coil, the vehicle-mounted excitation coil generates a traveling wave magnetic field and induces voltage on the high-temperature superconducting strip, and based on the magnetic flux quantum coupling theory, the induced voltage has a direct-current component. The vehicle-mounted superconducting magnet is excited, and attenuation of magnet current is compensated. According to the invention, efficient and stable non-contact direct current compensation of the vehicle-mounted superconducting magnet is realized.

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 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.

The invention discloses a radio frequency superconducting material performance testing system and a surface resistance measuring method.The radio frequency superconducting material performance testing system comprises a radio frequency cavity module, a low temperature module and a measuring module, the radio frequency cavity module comprises a mushroom-shaped superconducting cavity, the inner wall of the superconducting cavity is plated with a Ni3tin film, and the inner wall of the superconducting cavity is plated with a Ni3tin film; the low-temperature module is provided with a multi-stage cooling structure and a magnetic shielding shell. The measuring module is used for collecting the sample temperature, the magnetic field, the vacuum degree, the radio frequency power and the direct-current power of the heater. According to the radio frequency superconducting material performance testing system, by optimizing the design of the mushroom-shaped cavity and adopting the Nb3Sn coating technology and the efficient conduction cooling low-temperature module, the dependence of a traditional radio frequency material testing system on a liquid helium low-temperature system is eliminated, a compact testing platform is formed, and high-field and high-resolution measurement of the surface resistance of an SRF material is achieved.

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.

Systems and techniques that facilitate scalable cryostats and cryogenic systems are provided. In an embodiment, a cryogenic system (300) can comprise a plurality of unit cells (304) joined together, wherein each unit cell comprises: a trapezoidal-shaped frame (704), wherein frames from adjacent unit cells are connected in a vacuum-tight manner to form a continuous, global vacuum enclosure, and wherein the unit cells are capable of being horizontally removed from or inserted into the plurality of joined unit cells. Furthermore, each unit cell can comprise at least one temperature shell (508, 510, 512), wherein temperature shells from adjacent unit cells are connected to form a continuous, global temperature shell. Moreover, each unit cell can comprise at least one cryogenic payload (514) located within the at least one temperature shell, that is cooled by at least one retrofitted version of a standard dilution refrigerator.

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.

A superconducting magnet assembly is provided. The magnet assembly includes a magnet and a switch assembly coupled to the magnet. The switch assembly includes a thermosyphon tube configured to carry cryogen therethrough, a switch, a first pressure valve, and a second pressure valve. The switch is configured to switch between a resistive mode and a superconducting mode, wherein the switch is in thermal contact with the thermosyphon tube. The first pressure valve and the second pressure valve are positioned on the thermosyphon tube and configured to control flow of the cryogen in the thermosyphon tube, and the switch is positioned between the first pressure valve and the second pressure valve. The magnet is configured to generate a polarizing magnetic field based on switching of the switch between the resistive mode and the superconducting mode.

The present invention discloses a low-temperature oil return device for a cascade refrigeration system, including an evaporator, a condenser, a compressor, an oil separator, a fine filter, a return air pipeline and a liquid supply pipeline. The evaporator is connected to the compressor, the oil separator and the condenser in sequence through the return air pipeline, and the condenser is connected to the evaporator through the liquid supply pipeline and the fine filter to form a heat exchange cycle. The return air pipeline is connected in parallel with the compressor and the oil separator through a bypass pipeline, and the fine filter is connected in series on the bypass pipeline. The present invention connects a fine filter in parallel to the liquid supply pipeline of the evaporator to intercept solid oil. By switching valves at a fixed time, the solidified oil can be melted by hot air and brought back to the compressor. The oil return time is adjustable. A throttling hand valve is installed on the bypass pipeline to adjust the flow pressure of the hot air. The device can effectively prevent or minimize the lubricating oil from entering the evaporator of the cascade low-temperature system, ensuring the long-term stable operation of the cascade unit and the continuous operation requirements of ultra-low temperature applications.