513 results about "Supercooling" patented technology

The invention discloses a dynamic load adaptive charging pile liquid cooling control method, relates to the technical field of thermal management, and solves the problems of temperature prediction deviation, local hot spot leak detection and protective supercooling caused by a simplified thermal model based on fixed parameters and key temperature points under rapid load fluctuation. Parameterization time-varying heat supply network parallel multi-rate observation is constructed, a heat exchange coefficient and node heat capacity are identified and calibrated through recursion with physical constraints, transmission time delay is merged into an extended state in an explicit mode, short-window high-frequency sampling and local temperature field reconstruction are triggered based on residual errors, and the time-varying heat supply network parallel multi-rate observation is achieved. A control sequence is issued in parallel by adopting hierarchical rolling type control with a second-order moment uncertainty constraint; based on the scheme, the short-term temperature field prediction precision and the local hot spot identification capability are improved, and the cooling resource directional utilization efficiency and the charging system operation continuity are remarkably improved.

The invention discloses a stirring head temperature control method and system, a medium and a product, and relates to the field of electric digital data processing. By implementing the application, the control system acquires the temperature data of the needle part and the shoulder part of the stirring head in real time, and predicts the temperature of the needle part and the temperature of the shoulder part within the future preset duration by using the temperature prediction model in combination with the cooling liquid flow of the needle part and the shoulder part. When the deviation between the predicted temperature and the target temperature exceeds the temperature threshold value, the control system can calculate and adjust the flow of the cooling liquid in time, and accurate dynamic control over the temperature of the stirring head is achieved. According to the predictive temperature control method, the machining quality problem caused by too large temperature fluctuation of the stirring head can be prevented, and the stability and controllability of the welding process are improved. Meanwhile, the control system controls the cooling liquid flow of the needle part and the shoulder part respectively, finer temperature adjustment is achieved, and the phenomenon of local supercooling or superheating caused by a traditional single cooling mode is avoided.

The embodiment of the invention provides a refrigerator performance prediction method and device, electronic equipment and a storage medium, and belongs to the technical field of refrigerators. The method comprises the steps that operation state parameters of a refrigerating machine unit are obtained, the refrigerating machine unit comprises a refrigerant system, the refrigerant system comprises an evaporator, a condenser and a compressor, and the operation state parameters comprise the first saturation temperature and the steam superheat degree of the evaporator, the second saturation temperature and the liquid supercooling degree of the condenser and the exhaust temperature of the compressor; calculating a first energy efficiency coefficient of the refrigerant system according to the first saturation temperature, the steam superheat degree, the second saturation temperature, the liquid supercooling degree and the exhaust temperature; obtaining rolling bearing transmission efficiency and motor efficiency of the refrigerator unit; and calculating a second energy efficiency coefficient of the refrigerator unit according to the rolling bearing transmission efficiency, the motor efficiency and the first energy efficiency coefficient. According to the embodiment, the accuracy of refrigerator performance prediction can be improved.

The invention provides a low-temperature heat pump liquid impact prevention and supercooling degree strengthening control method based on dual-mode self-adaptive regulation and control, which comprises the following steps: monitoring the bottom temperature of a gas-liquid separator and the change rate of the temperature, and controlling the supercooling degree of the gas-liquid separator on the basis of the difference value between the temperature and a preset safety critical temperature and the difference value between the change rate and a preset minimum temperature rise rate, constructing a liquid impact risk index; based on the liquid impact risk index, the pulse power excitation intensity is calculated, the number of opened spraying channels is selected according to the pulse power excitation intensity, the pulse duty ratio of each channel is adjusted, the high-temperature gas-state refrigerant is controlled to be injected into the bottom of the gas-liquid separator, and the liquid-state refrigerant is driven to evaporate; generating a mode switching score, and generating a mode switching signal when the mode switching score exceeds a mode switching threshold value and the temperature of the gas-liquid separator reaches a safety lower limit; and according to the mode switching signal, a supercooling degree strengthening mode is switched, and the opening degree of an economizer branch electronic expansion valve is adjusted according to the deviation between the current supercooling degree and the target supercooling degree.

The utility model relates to the technical field of concrete product production, and discloses a steam curing pool which comprises a containing pool, a conveying pipe is fixedly connected in the containing pool, a spraying opening is formed in the containing pool, a motor is fixedly connected in the containing pool, the output end of the motor is fixedly connected with a second transmission rod, and the output end of the second transmission rod is fixedly connected with a third transmission rod. A first transmission rod is rotatably connected to one side of the outer wall of the second transmission rod, a moving plate is rotatably connected to one side of the outer wall of the first transmission rod, a rotating column is fixedly connected to the bottom of the moving plate, a rotating plate is fixedly connected to the bottom of the rotating column, and the outer wall of the rotating plate is slidably connected to the interior of the placement pool; a first limiting groove is formed in the rotating plate. According to the utility model, the steam is sprayed in a swinging manner, so that the steam is more uniformly distributed in the curing pool, local overheating or supercooling is avoided, the problem of different local temperatures caused by non-uniform spraying of the steam is solved, and the quality and the uniformity are improved.

The invention relates to the technical field of new energy automobile heat management, and belongs to an indirect heat pump heat management system for a new energy automobile. Battery outlet water and warm core outlet water are converged and then shunted through a waterway integration mode of a five-way valve and a proportional three-way valve, and the flow is distributed through the proportional three-way valve; the mixed water enters the battery to control the water inlet temperature of the battery, so that a water-water heat exchanger can be saved, and the effects of reducing cost and improving efficiency are achieved; on the aspect of the agent side, a large-diameter electronic expansion valve is arranged at an outlet of the water-cooling condenser, the internal flow and state of the water-cooling condenser are actively controlled by adjusting the opening degree of the large-diameter electronic expansion valve, the supercooling degree can be increased, the superheat degree can be restrained, the heat exchange capacity and the accurate control capacity can be enhanced, and heating and dehumidification outlet air temperature control in spring and autumn can be better achieved.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The invention discloses a switchgear control device and method based on an electrolytic dehumidification membrane with a wide working range, which relates to the technical field of moisture-proof dehumidification equipment. The wide working range (−10 to 70° C., 20%-100% RH) is applicable in cold, hot, and other extreme environments, with no icing, frosting, or damage due to supercooling, overheating, and other issues.

The invention discloses a hydrated salt phase change microcapsule and a preparation method thereof.The hydrated salt phase change microcapsule is composed of a nucleating agent modified hydrated salt phase change core material and a polymer / heat conduction material hybrid shell layer, and the phase change microcapsule is prepared by the steps that firstly, the nucleating agent modified low-supercooling-degree inorganic hydrated salt phase change core material is prepared through a melt blending method; then inducing monomer polymerization on an oil-water interface through a W / O inverse emulsion template method to form a polymer shell layer, and finally introducing the modified heat-conducting material into the polymer shell layer to construct a high-heat-conducting shell layer. The phase change microcapsule prepared by the invention has a coating rate higher than 80%, a supercooling degree lower than 3 DEG C, an apparent heat-conducting property greater than 1 W / (m.K), controllable particle size distribution (5-70 [mu] m), excellent encapsulation performance and cycling stability, and has a wide application prospect in the field of heat storage.

The invention discloses a method for testing the thermophysical property of a rare earth aluminate glass melt. The density, the viscosity and the surface tension of the high-temperature melt of La2O3-Al2O3-ZrO2 series glass are tested by adopting a container-free air suspension technology. The method has the remarkable advantages that a small amount of raw materials can be used and rapid heating and cooling can be realized by the container-free air suspension technology, crucible pollution and devitrification are avoided, and the measurement precision is ensured; the temperature control range of laser heating is from 200 DEG C to 3200 DEG C, and the physical property data of the La2O3-Al2O3-ZrO2 glass in a deep supercooling interval can be accurately measured; the doping amount of ZrO2 has obvious influence on the viscosity and the surface tension of the glass, and important reference is provided for component design and process optimization of the high-performance glass of the system; experimental results show that along with the increase of the ZrO2 content, the glass is easy to crystallize in the cooling process, and the physical property data of a low-temperature interval cannot be measured, but the measurable range can be effectively extended by adopting the method disclosed by the invention, and a reliable testing means is provided for the physical property research of the rare earth aluminate glass and the preparation of high-performance glass.

The invention relates to the technical field of phase change heat transfer, and particularly discloses a multi-field coupling enhanced phase change heat transfer visualization experiment research device which comprises a vacuum cavity provided with a heat exchange block mounting hole, an auxiliary cooling device mounting hole, first to fifth thermocouple mounting holes, a wire mounting hole, an electric field, a magnetic field mounting position and an electromagnetic wave incident port. The heat exchange block is mounted in the heat preservation sleeve; the auxiliary cooling device is mounted in the auxiliary cooling device mounting hole; a heating rod mounting hole is formed in the bottom of the end cover; the heating rod is mounted in the heating rod mounting hole; the heat preservation sleeve is installed in the heat exchange block installation hole and provided with an ultrasonic oscillation generating device installation position. The electric field-magnetic field generating device is provided with an electric field generating device and a magnetic field generating device. The influence of the superheat degree and the supercooling degree on enhanced thin liquid film boiling heat transfer and enhanced condensation heat transfer can be researched by changing the heating rod and the heat exchange fluid flow.

The invention relates to the technical field of energy control, and provides an ultra-low environment temperature carbon dioxide-based dual energy supply control system, which comprises a main circulation unit, an auxiliary circulation unit, a heat exchange water path module and a controller, a CO2 heating loop is adopted in the main cycle, and an R134a condensation supercooling loop is adopted in the auxiliary cycle; a controller constructs a directed graph structure based on thermodynamic topology, a three-branch convolution mechanism is adopted to model an energy transfer path, embedded representation is optimized and controlled in combination with an interval-contrast loss function, and an accurate control instruction is generated to adjust components such as a compressor and a throttling valve; in the aspect of fault diagnosis, a time parameterization convolution-symmetric GRU model is constructed, a Legendre polynomial is utilized to model a time convolution kernel, a Verlet integral mechanism is combined to reconstruct a hidden state path, and accurate identification of an abnormal trend in multi-source data is realized. According to the system, the energy supply stability and the intelligent level in the extremely low-temperature environment are improved.

The utility model discloses a stirring device for industrial enzyme preparation production, which relates to the technical field of enzyme preparation production and comprises a tank body, outer channel steel for reinforcement is sleeved at the bottom of the tank body, a cover plate is hermetically connected to the top of the tank body, and a feed pipe penetrates through the cover plate. A discharging pipe communicated with the interior of the tank body is arranged on one side of the tank body, and an observation window is formed in the side wall of the tank body. The conveying rod is driven by the output shaft of the motor to rotate in the conveying pipe, fermentation liquor at the bottom of the tank body can be conveyed to the upper portion along the conveying pipe, damage of shear force to zymoprotein molecules is reduced, the fermentation liquor flows all around under the guidance of the guide plate and the arc-shaped groove, the circulation speed of the fermentation liquor in the tank body is increased, and the fermentation efficiency is improved. The cells are in full contact with nutrient substances, it can be ensured that temperature distribution in fermentation liquor is more uniform, local overheating or supercooling is avoided, and the growth speed and enzyme production efficiency of the cells are improved.

The invention discloses a biological material supercooling storage system and a working method thereof. The biological material supercooling storage system comprises a sample carrier for storing and placing a biological material; the sample cavity is used for providing a subcooled storage environment of-30 to-5 DEG C for the biological material; the temperature control module is used for providing a controllable cooling rate for the interior of the refrigeration module, the cooling rate is greater than 2 DEG C / min in a temperature interval of above 5 DEG C, the cooling rate is 1-2 DEG C / min in a temperature interval of 0-5 DEG C, and the cooling rate is less than 1 DEG C / min in a temperature interval of below 0 DEG C; the electromagnetic excitation module is used for generating a low-frequency to very high-frequency 50Hz-300MHz electromagnetic field in the sample, and inhibiting the formation and growth of ice crystals in the sample by using the non-thermal effect of the electromagnetic field; the cooperative control module is used for achieving cooperative control over the cooling rate, the supercooling temperature and the electromagnetic field intensity so as to maintain long-term storage of the samples in a liquid state at the supercooling temperature, the storage temperature of the biological materials is reduced, meanwhile, the biological materials are not frozen, and liquid-state storage of the biological materials with different sources and different sizes at the low temperature can be achieved.

The invention belongs to the related technical field of additive manufacturing, and discloses an electron beam melting wire liquid nitrogen copious cooling additive manufacturing method and system.The method comprises the steps that in the electron beam melting printing forming process, liquid nitrogen is sprayed to a molten printing wire under electron beam irradiation, and the liquid nitrogen is sprayed to the molten printing wire; the molten printing wires are subjected to nitridation reaction under the action of electron beams while being subjected to liquid nitrogen cryogenic cooling, so that the crystal structure of a formed part is regulated and controlled, and the mechanical performance is enhanced; and / or liquid nitrogen is sprayed to the printing wire material which begins to be solidified, so that the printing wire material is subjected to liquid nitrogen deep cooling, and the crystal structure of the formed part is regulated and controlled to achieve mechanical property enhancement. Liquid nitrogen is introduced into the electron beam additive manufacturing device for deep cooling, the extruded printing wire is solidified at an extremely high cooling speed after being melted, a large number of homogeneous nucleation sites are formed in a melting area due to the high supercooling degree, the solidification speed is high, a microstructure is customized into uniform and fine equiaxed crystals, the strength and toughness of the material are improved, and the production cost is reduced. The mechanical property is improved.

The utility model discloses a midsole secondary foaming forming machine cooling device which comprises a base, the top of the base is fixedly connected with a fixing block, one side of the fixing block is provided with a round through groove, a placing assembly used for placing a mold is arranged in the round through groove, the top of the base is fixedly connected with a bearing seat, and the bearing seat is provided with a bearing block. A cylinder is rotationally connected into the bearing seat through a bearing, a cavity is formed in the cylinder, a spiral pipe is fixedly connected into the cavity, and a connecting frame is fixedly connected to the inner wall of the cylinder. According to the utility model, the surface of the mold can be uniformly cooled through rotating centrifugal force, the problems of local supercooling and insufficient cooling of the mold are reduced, the deviation of medium and low density is reduced, the rotating speed required by different foaming materials can be matched, the rotating speed adjusting time is shortened, and the convenience of the device is improved; and the placing frame can be pushed to the middle of the cylinder, so that the production efficiency of the device is improved.

The invention discloses a controllable low-temperature composite phase change material of binary inorganic hydrated salt based on sodium sulfate decahydrate and a preparation method of the controllable low-temperature composite phase change material, and relates to the technical field of cold storage. According to the material, sodium sulfate decahydrate is used as a main phase change material, magnesium chloride hexahydrate, zinc nitrate hexahydrate and the like are combined as binary inorganic hydrated salt phase change materials, and a nucleating agent, a thickening agent, a cooling agent and a supporting material are added. The invention has obvious innovation. In a material system, sodium sulfate decahydrate is used as a main body and matched with binary inorganic hydrated salt, the phase change temperature is regulated and controlled in an accurate proportion, and the problems of phase separation and supercooling are solved. The preparation method comprises the following steps: mixing the inorganic hydrated salt with the additive, grinding, magnetically stirring, heating and carrying out vacuum adsorption to prepare the composite phase change material, and blending to obtain the composite material with the required temperature, the composite material is safe and stable, has good thermal conductivity and high phase change latent heat, can accurately control the temperature, meets the requirements of the fields of food, fresh food, medicine, chemical industry and the like in cold-chain transportation, and has wide application prospects. And the transportation efficiency and the product quality are obviously improved.

The invention relates to the technical field of heat management, in particular to a heating control system of a photovoltaic street lamp energy storage device, which comprises an early warning monitoring module for judging whether the energy storage device enters a low-temperature early warning state or not according to real-time temperature data. And if entering the early warning state, the hot area modeling module extracts temperature gradient characteristics through thermal infrared threshold segmentation, constructs a heating efficiency model and calculates the optimal heating power, and the partition heat supply module drives heating elements to perform partition heating according to the optimal power. If not, the temperature difference evaluation module calculates a difference value matrix through the temperature uniformity image and judges whether a local supercooling area exists or not. And if yes, the supercooling heat compensation module generates a compensation heating signal to directionally heat the supercooling area until the temperature of the energy storage device is in a normal working interval without early warning and with uniformity. According to the system, efficient and energy-saving low-temperature heating control is achieved through intelligent zoning and directional heating.

The invention provides a collaborative model prediction control method for a regional cooling system penetrating through a source network load full chain, and belongs to the technical field of intelligent control of cooling systems. Collecting and preprocessing meteorological and operation characteristic data of the system; inputting the data into an Attention-LSTM cold load prediction model, determining an optimal step length in combination with thermal inertia analysis, and outputting a cold load prediction sequence; based on the unified energy path theory, a pipe network quasi-steady-state hydraulic and thermal coupling mechanism model is constructed; by taking load prediction as input and the coupling model as constraint, establishing an optimization model containing three targets of pump consumption power and the like; rolling optimization is carried out by adopting a multi-target particle swarm optimization algorithm, and optimal operation parameters meeting thermal unbalance degree constraints are obtained; and in combination with the peak-valley electricity price, a cold source unit and cold storage device collaborative scheduling strategy is formulated, and a final control instruction is generated. The phenomena of insufficient cold supply at the tail end and local supercooling caused by hydraulic imbalance of a pipe network and large hysteresis characteristics are effectively solved, and optimal control over the operation cost is achieved.

The invention relates to the technical field of natural gas hydrate exploitation and seabed carbon dioxide sequestration, in particular to equipment and a method suitable for macroscopic and microscopic research of a hydrate residual cage structure. According to the technical scheme, the device comprises a gas-liquid injection system, and further comprises a fluid separation-blocking-unblocking core system, a fluid additional injection core system, a horizontal supercooling flow module, a vertical supercooling flow module and a cage type structure microcosmic research module, according to the method, the hydrate residual cage-shaped structure in hydrate decomposition water under the high-pressure flowing condition can be efficiently manufactured, and then research is conducted according to the action mechanism that the residual cage-shaped structure affects hydrate secondary generation-rapid blocking and an effective elimination method of the residual cage-shaped structure; meanwhile, key experiment conditions are provided for microscopic optical research on the molecular scale of the residual cage-type structure under high-pressure and low-temperature conditions; in addition, the method can effectively simulate and systematically research the hydrate-method seabed carbon dioxide sequestration technology, and theoretical support is provided for engineering application of the hydrate-method seabed carbon dioxide sequestration technology.

The invention relates to a system for full-supercooling large-flow liquid methane filling and a using method of the system. The full-supercooling large-flow liquid methane filling system is stable, reliable, high in automation degree, capable of dynamically adjusting the supercooling temperature and flow of liquid methane and high in accuracy, and comprises a storage box, a pressurization module, a recovery module, a methane filling module, a control module and a nitrogen filling module, and the pressurization module comprises a methane pressurization tank; the methane filling module comprises a methane filling tank, the nitrogen filling module comprises a nitrogen filling tank and a subcooler, the recovery module comprises a methane recovery tank, and the control module pressurizes the methane recovery tank and the methane filling tank by controlling the pressurization module and adjusts the filling flow and temperature of methane to prevent condensation by controlling the methane filling module and the nitrogen filling module. Flow stabilization and backflow are carried out by controlling the methane filling module and the recovery module.

The invention belongs to the technical field of tractor thermal management, and provides a hybrid tractor thermal management system, method and device and a medium, and the method comprises the steps that a temperature collection module collects the temperature of a part through a sensor, and judges the working condition in combination with a preset threshold value; the cooling module regulates and controls cooling submodules of an engine, a motor, a controller and a battery according to working conditions and regulates heat dissipation; the heating module is used for controlling the battery preheating and cockpit heating sub-module under a low-temperature working condition; the heat recovery module recovers waste heat through a heat exchanger according to working conditions, thermoelectric power generation is utilized, and efficient heat management of the hybrid tractor is achieved; through precise temperature collection and multi-working-condition intelligent regulation and control, it is ensured that core components are always in the optimal working temperature range, the performance reduction, faults and even safety problems caused by overheating or supercooling are effectively avoided, and the reliability and stability of the hybrid tractor are remarkably improved.

The application provides a kind of shaped phase change material and its preparation method.The phase change material includes the following component materials according to mass percentage: 45.8-56.7% of dodecahydrate disodium hydrogen phosphate, 7.9-22.9% of sodium carbonate decahydrate, 7.6-15.9% of sodium sulfate decahydrate, 2.46-4.05% of reinforcing material, and 15-20% of adsorption material.The preparation of the phase change material includes the following steps: 1, preparing materials;2, preparing inorganic salt mixture;3, preparing molten inorganic salt mixture;4, preparing mixture and sealing;5, preparing shaped phase change material.The shaped phase change material prepared by the application has suitable phase change temperature, higher latent heat of phase change, no liquid leakage, no toxicity and non-combustibility, small supercooling degree, and no phase separation;at the same time, for the application occasions requiring transportation and storage between 20-30℃, the shaped phase change material can be used as an effective normal temperature cold storage agent to resist low temperature environment and protect specific chemicals and medicines from temperature fluctuation.

The utility model discloses heating equipment for kelp seedling culture, which comprises a culture pond, a heating box is arranged on the front side of the culture pond, a first pump machine is arranged on one side in the heating box, the output end of the first pump machine is fixedly connected with a water conveying steel pipe, one end of the water conveying steel pipe is fixedly connected with the input end of a second pump machine, and the other end of the second pump machine is fixedly connected with a water pump. A spiral electric heating resistor is arranged on the outer ring of the water conveying steel pipe. A stable heat source is provided through the heating box, it is ensured that the temperature environment in the culture pond is suitable for growth of kelp seedlings, healthy development of the kelp seedlings is facilitated, the first pump machine pushes water flow to circulate, the heating effect of the spiral electric heating resistor is matched, it is ensured that the water temperature in all positions in the culture pond is uniform, local overheating or supercooling is avoided, and the spiral electric heating resistor converts electric energy into heat energy; the flowing water is directly heated, the heat energy utilization efficiency is improved, the energy consumption is reduced, a closed water circulation system is formed through cooperative work of the first pump machine and the second pump machine, and the flowability of the water in the culture pond is improved.

The invention discloses a reinforcement learning control method for a novel ship cooling system, and the method comprises the steps: determining an input measured value and an output action value of the novel ship cooling system, the input measured value is a state parameter strongly related to a vacuum degree / supercooling degree control target, and the output action value comprises the opening degree of a spraying valve and the rotating speed of a condensate water circulating pump; a reinforcement learning reward function is constructed, and the influence degree of the development process of the seawater heat exchanger on the vacuum degree / supercooling degree is reflected through the reward function; network parameter off-line training is carried out, wherein the network parameter off-line training comprises strategy network off-line training and value network off-line training; and deploying the strategy network and the value network after offline training to a novel cooling system control device, and performing online optimization on strategy network parameters and value network parameters until a vacuum degree / supercooling degree control effect required by an application is met. The control precision, the reliability and the operation efficiency of the novel cooling system of the ship can be improved.

The invention provides a control method and device of an air conditioner and the air conditioner. The control method comprises the steps that a signal for entering a healthy airflow mode is received, and the air conditioner is controlled to enter the healthy airflow mode; in the healthy airflow mode, whether the air outlet angles of all air deflectors are the same or not is judged; and if yes, all the air deflectors are controlled to sequentially start to circularly swing according to the continuous and lagged time sequence. By setting a healthy airflow mode, the system can intelligently control the air guide plate to swing according to a certain rule, so that the situation of local supercooling or superheating possibly caused by single-direction air supply is avoided, cold and hot air in a room is distributed more uniformly, and the comfort level of human body feeling is improved.

The invention belongs to the technical field of clothes processing equipment, and particularly relates to a series-connection supercooling deep dehumidification heat pump clothes dryer and a control method.The series-connection supercooling deep dehumidification heat pump clothes dryer comprises a drying chamber, a circulating air duct, a heat pump system, a rotating wheel dehumidification device, a dehumidification air duct, a subcooler and a control system, and an evaporator and a condenser are arranged in the drying air duct; first-stage condensation dehumidification and second-stage adsorption dehumidification are achieved; the rotating wheel dehumidification device is provided with a dehumidification area and a moisture absorption area, external fresh air is introduced through a dehumidification air duct for dynamic regeneration, and the subcooler and the heat pump system are connected in series and used for heating the fresh air and improving the supercooling degree of a refrigerant. Dynamic adjustment of the drying process is achieved through a multi-stage dehumidification structure and a fan variable speed control strategy, the dehumidification depth and the heat recovery efficiency are improved, the drying time is shortened, energy consumption is reduced, and the clothes care effect is improved.

The invention discloses a carbonized melamine sponge phase change cold storage material for efficiently improving the degree of supercooling, the carbonized melamine sponge phase change cold storage material is formed by compounding carbonized melamine sponge and a sodium chloride aqueous solution, and the carbonized melamine sponge is formed by sintering melamine sponge; the mass ratio of the carbonized melamine sponge to the sodium chloride aqueous solution is 1: (65-80). The carbonized melamine sponge for loading the phase change cold storage material is prepared by sintering. As the carbonized melamine sponge has a porous structure and surface characteristics, the carbonized melamine sponge can be used as an ideal carrier of a composite cold storage material, and after the carbonized melamine sponge is compounded with a sodium chloride aqueous solution, the supercooling degree of the sodium chloride aqueous solution can be remarkably reduced, meanwhile, high latent heat is kept, and the crystallization stability and the energy storage density are improved. The carbonized melamine sponge phase change cold storage material shows stable phase change performance in the range of-35 DEG C to 15 DEG C, and is suitable for various low-temperature application scenes.

The invention discloses a low-temperature phase change energy storage material and a preparation method thereof, and relates to the technical field of cold storage materials. The provided organic phase-change material is formed by jointly matching alkane and fatty alcohol, the melting temperature of the organic phase-change material is 0-10 DEG C, the crystallization temperature is-5-5 DEG C, and the melting temperature and the crystallization temperature can be adjusted according to requirements. The material has high latent heat of phase change, and can be efficiently used in scenes of cold chain transportation, refrigeration house energy conservation and the like. The material is non-toxic and harmless, has stable cycle performance, and effectively overcomes the defects of poor cycle performance, easy phase separation, large supercooling degree and the like of an inorganic material. The material is applied to cold storage energy conservation or cold chain transportation, and the effects of energy conservation, environmental protection and electric charge saving can be achieved by utilizing the valley electricity energy storage principle.

This invention discloses a method for preparing a uniform microstructure on the surface of a containerless solidified niobium alloy for a space station, relating to the field of containerless materials science experimental technology. The method first screens for highly supercooled samples suitable for preparing a uniform microstructure using this method in containerless space station experiments; calculates or experimentally determines the primary phase dendrite growth rate, the cooling rate coefficient of radiative heat dissipation during the cooling stage, and the primary phase nucleation rate; and conducts containerless space station experiments to allow the niobium alloy to undergo deep supercooling and rapid solidification within a determined suitable supercooling range, thus obtaining a solidified alloy sample with a uniform surface microstructure. This invention actively controls the distribution of dendrites and eutectic phases, resulting in a surface microstructure with uniformly distributed dendrites and interdendritic eutectic phases.