12 results about "Cryogenic technology" patented technology

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 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 present application relates to the technical field of low temperature, disclose a kind of fault early warning diagnosis method, device and program product of hydrogen liquefaction system, the present application is by obtaining the operating characteristic parameter set of hydrogen liquefaction system, the first parameter set of helium compressor equipment and the second parameter set of helium oil separation and circulating cooling system, realize the comprehensive monitoring of hydrogen liquefaction system and its key subsystem.Further, the representative urgency, sudden accident prediction is combined with the risk causing accident prediction with accumulation effect, both pay attention to the sudden accident scene in system debugging process, also consider the risk accumulation in long-term operation, can more comprehensive, accurate, effectively assess the operating condition of hydrogen liquefaction system, fill the blank of lack of comprehensive fault early warning diagnosis in prior art.

This invention discloses a sodium-ion battery cathode material prepared using cryogenic technology and its preparation method, relating to the field of sodium-ion battery technology. The cathode material, prepared using cryogenic technology, comprises a substrate and a coating covering the surface of the substrate. The substrate comprises the following components: 70-80 parts of positive electrode active material, 1-5 parts of conductive agent, 5-15 parts of binder A, and 30-45 parts of solvent A. The coating comprises the following components: 5-8 parts of conductive agent, 3-5 parts of binder B, 2-5 parts of corrosion inhibitor, 1-2 parts of transition metal salt compound, and 15-20 parts of solvent B. By introducing a corrosion inhibitor with a specific chemical structure combined with the coating design, a uniform and dense protective layer is formed on the electrode surface, effectively isolating it from electrolyte corrosion. The corrosion inhibitor core consumes corrosive substances through passivation and reversible redox reactions, significantly slowing down the interfacial corrosion rate, especially under long-term cycling and harsh environments.

The utility model relates to the technical field of refrigeration and low temperature, and provides a combined type thermal switch and a refrigerator, the combined type thermal switch comprises a thermal switch body and a plurality of superconductive layers, and the thermal switch body is provided with a hot end and a cold end which are oppositely arranged; the first superconducting layer is arranged on the end face of the hot end and tightly attached to the end face of the hot end. The second superconducting layer is arranged on the side, away from the hot end, of the first superconducting layer, and the first superconducting layer and the second superconducting layer are arranged in a stacked mode; wherein the superconducting transition temperature of the first superconducting layer is lower than that of the second superconducting layer. According to the refrigerator, heat leakage generated when the heat switch is switched off is reduced, the refrigerating capacity of the refrigerator is greatly reduced, the refrigerator can obtain the lower refrigerating temperature, and the refrigerating capacity is also improved at the same temperature.

The invention relates to the technical field of low temperature, and discloses an evaporation safety assessment method for a liquid hydrogen storage tank, which comprises the following steps of: establishing safety judgment standards from two core dimensions of pressure and temperature, focusing a rate upper limit and a frequency spectrum energy characteristic on the pressure dimension, and considering an amplitude upper limit and evolution coordination on the temperature dimension; furthermore, the characteristic difference of fast pressure transient response and thermal inertia of temperature in the evaporation process of the liquid hydrogen storage tank can be accurately captured, and the pertinence and comprehensiveness of safety evaluation are improved. Furthermore, through safe judgment logic of two dimensions of pressure and temperature, no omission risk of the evaporation state of the liquid hydrogen storage tank is ensured, and stable operation of the storage system is ensured. Furthermore, through cooperative monitoring and judgment of pressure and temperature indexes, the abnormal evaporation trend caused by the Taxnius oscillation effect can be recognized in the early stage of the self-pressurization stage, sufficient time is reserved for safety intervention such as pressure release valve operation, sudden overpressure release is effectively avoided, and economic losses and potential safety hazards are reduced.

The invention relates to the technical field of refrigeration and low temperature, in particular to an AI energy-saving intelligent control method and system, and provides the AI energy-saving intelligent control method in order to solve the problems of how to start and stop a defrosting device according to needs through AI vision and how to achieve energy conservation and consumption reduction through peak and valley electricity prices. Comprising the steps of obtaining historical operation data of a target refrigeration house, monitoring the internal environment of the target refrigeration house in real time, and calculating the frosting rate of the target refrigeration house according to the historical operation data and the internal environment; the external environment of the target refrigeration house is monitored in real time, a door opening event of the refrigeration house is obtained, the frosting rate is corrected according to the door opening event and the external environment, and the correction rate is obtained; the real-time frosting degree of the target refrigeration house is obtained according to the real-time image; and defrosting threshold values corresponding to different electricity price time periods are set according to the historical operation data and the historical electricity price data, and the defrosting state is determined according to the comparison result of the frosting threshold values and the real-time frosting degree.

The utility model relates to the technical field of profound hypothermia, and provides a precooling device and a whole pulse tube refrigerator, the precooling device comprises a first cooling module used for cooling a compressor, the first cooling module comprises a first support base and a plurality of cooling blocks, the plurality of cooling blocks wrap the periphery of the compressor, and liquid nitrogen is stored in the cooling blocks; the first supporting base is arranged at the bottom of the cold block and used for fixing the cold block and insulating the cold block and the vacuum box. The second cooling module is used for cooling the hot end flange and the phase modulation mechanism, the second cooling module comprises a liquid nitrogen tank and a second supporting base, the liquid nitrogen tank is used for cooling the hot end flange and the phase modulation mechanism, and the second supporting base is used for insulating heat of the liquid nitrogen tank and the vacuum box. According to the utility model, the whole pulse tube refrigerator can be pre-cooled to a liquid nitrogen temperature zone, and the laser displacement sensor can monitor the running state of the compressor.

This invention pertains to superconducting cryogenic technology and relates to a liquid helium Dewar micro-perturbation zero-evaporation cooling system. Liquid helium is selected as the cooling medium, and utilizing the siphon principle, a closed-loop circulation system is formed by the main installation chamber for the cryogenic instruments, the secondary installation chamber for the refrigerator, the liquid helium connecting pipe, and the evaporated helium recovery pipe. This system is used to cool the coil of the superconducting cryogenic current comparator and the superconducting quantum interference device (QFID). The circulation system is placed within an outer cylinder. The main installation chamber contains an equipment passage, and a well-like structure is located on the western side of the equipment passage. The superconducting cryogenic current comparator coil and the superconducting QFID are installed in a shielded box and embedded in the well-like structure. The top of the well-like structure has a through-hole connecting the liquid phase space and the gas phase space of the equipment passage. The lower surface of the refrigerator's cold head is located above the liquid helium surface, and the vertical distance between it and the upper surface of the well-like structure is at least 100 mm. This invention features low cost and high liquid helium utilization.

The application relates to an ultra-low-temperature refrigeration system and a refrigeration method thereof, which comprises a Stirling refrigeration unit and an adiabatic demagnetization refrigeration unit coupled with the Stirling refrigeration unit; the Stirling refrigeration unit comprises a pulse tube cold finger unit connected with the adiabatic demagnetization refrigeration unit and a pulse tube compressor unit connected with the pulse tube cold finger unit, wherein the pulse tube compressor unit is used for driving the pulse tube cold finger unit to refrigerate, the pulse tube cold finger unit is used for refrigerating to provide pre-cooling refrigeration capacity for the adiabatic demagnetization refrigeration unit, and the adiabatic demagnetization refrigeration unit is used for realizing refrigeration based on a magnetocaloric effect; the ultra-low-temperature refrigeration system directly combines a long-life Stirling type architecture with the adiabatic demagnetization refrigeration, fully utilizes the advantages of the Stirling type refrigeration machine and the adiabatic demagnetization refrigeration system, can greatly reduce the complexity of space ultra-low-temperature technology, and further improves the efficiency of the whole system.

This invention discloses a liquid nitrogen and liquid oxygen / liquid argon coupled power generation and cryogenic technology, belonging to the fields of new energy power generation and cryogenic refrigeration. Based on the prior patent application CN202410774560.6 (a temperature difference and pressure difference coupled power generation and refrigeration technology), the working fluid and equipment are further optimized. Utilizing the different physical properties of liquid nitrogen and liquid oxygen / liquid argon in their saturated states—different pressures at the same temperature and different temperatures at the same pressure—a temperature gradient and a pressure gradient always exist. Under the action of the heat exchange coil, the two working fluids maintain a low temperature difference and a large pressure difference. Using the pressure difference potential energy, octafluoropropane liquid flows, driving a cryogenic turbine to generate electricity, while the temperature of both working fluids gradually decreases. Then, using a room temperature heat source or cryogenic waste heat, the low-pressure working fluid (liquid oxygen / liquid argon) is heated, the pressure difference reverses, and octafluoropropane flows in the opposite direction, driving an axial-flow turbine to continue generating electricity (rotation unchanged), while the medium returns, completing the cycle of power generation. Simultaneously, the liquid oxygen / liquid argon cools or condenses the external heat source, supplying cold energy to the outside world or being used for liquefied natural gas, liquefied air, etc.

The application discloses a hydration treatment method of low-creeping anode foil, and belongs to the technical field of aluminum electrolytic capacitor anode foil. The method adopts the way of grading water boiling and adding low-concentration citric acid to improve the quality of the hydration film, and introduces an ultralow-temperature technology treatment between two-stage water boiling, so that the problem of increased power consumption of products caused by the citric acid water boiling technology can be effectively solved. Compared with the existing mixed acid formation process in the industry, the power consumption is similar, the capacity is 3% lower, and the leakage current is reduced by 50%. The application provides a method which can combine the liquid nitrogen ultralow-temperature technology with the citric acid grading water boiling, so that the leakage current of the anode aluminum foil is lower under the premise of ensuring normal production, and the service life is prolonged.