43results about How to "High latent heat value" patented technology

The invention discloses a low temperature phase change cool storage agent and a preparation method thereof. The low temperature phase change cool storage agent comprises, by mass, 8% to 19.5% of ammonium chloride, 0.1% to 2% of dipotassium phosphate, 0.1% to 1% of sodium hydroxyethyl cellulose, 0.05% to 0.1% of nano-titanium dioxide and the balance deionized water. The preparation method includes adding the ammonium chloride, the dipotassium phosphate and the nano-titanium dioxide in the deionized water, uniformly mixing to obtain a solution, heating the solution to 70 DEG C to 80 DEG C, then slowly adding the sodium hydroxyethyl cellulose in the solution under high speed stirring, and uniformly stirring to obtain the low temperature phase change cool storage agent. Compared with low temperature phase change cool storage agents and preparation methods in prior art, the low temperature phase change cool storage agent and the preparation method thereof have the advantages that the low temperature phase change cool storage agent is low in phase transition temperature, free of salt crystal separation, high in phase change potential heat value, free of potential heat value decay after overturn circulation and the like, raw materials are easy to obtain, the production is easy, the low temperature phase change cool storage agent is safe and non-toxic, and the low temperature phase change cool storage agent has a potential application value in food fresh keeping and biological vaccine cold chain transportation.

The invention discloses a nanometer phase change energy-storage-type heat pump water heater. The heat pump water heater comprises a phase change energy storage box, wherein a condensation heat exchange coil pipe and a waterway heat exchange coil pipe are mounted in the phase change energy storage box; an expansion valve, an evaporimeter and a compressor are connected in a condensation heat exchange coil pipe loop in sequence; the phase change energy storage box is filled with a nanometer phase change energy storage material of which the phase change temperature is 50 to 60 DEG C; the nanometer phase change energy storage material comprises the following components in parts by weight: 0.5 to 2.0 parts of nano-particles, 0.9 to 3.6 parts of a dispersant, 94.4 to 98.6 parts of a phase change working medium. The potential heat value of the phase change material is large, and lots of heat can be absorbed in a phase change process, so that the heat conductivity coefficient of the phase change material is high, the heat transfer coefficient of the phase change energy storage box is improved, the time for thermal reaction is shortened, the efficiency is higher, and the energy conservation can be achieved better; thus, the heat pump water heater provided by the invention can be applied to the production and life field to realize that electric energy can be utilized to generate and store the heat during a low electricity demand period and release the heat during a high electricity demand period. Thus, the mismatch of two sides of energy supplying and energy demanding on time, strength and place is effectively released and solved, so that the aim that energy can be utilized reasonably and environmental pollution can be relieved is achieved.

The invention discloses a preparation method of a high-thermal-conductivity flexible phase change material and a battery module. The preparation method of the high-thermal-conductivity flexible phasechange material comprises the following steps: putting a styrene-butadiene-styrene block copolymer into an organic solvent to be sufficiently dissolved into a gel; then mixing paraffin and a heat conduction enhancer, grinding into powder, and fully stirring and mixing with the colloidal styrene-butadiene-styrene block copolymer. The traditional melt blending process is omitted; therefore, the separation phenomenon of two materials is avoided; the adopted organic solvent is easy to volatilize, so that a compact reticular film is formed on the surface of the phase-change material, the coating compactness of the composite phase-change material powder is effectively improved, the flexibility and toughness of the phase-change material are improved, the leakage resistance and latent heat value are improved, and the heat-conducting property of the phase-change material can be improved by adding the heat conduction enhancer .

The invention discloses an inorganic phase-change composite material and a preparation method of the material. The phase-change material comprises a main heat agent, a nucleator, a pH (potential of hydrogen) regulator, a corrosion inhibitor, a heat conduction agent and water, wherein the mass of the nucleator is 3-6% of that of the main heat agent; the mass of the pH regulator is 0-3% of that of the main heat agent; and the mass of the corrosion inhibitor is 0.5-2% of that of the main heat agent. Eutectic salt is prepared by a high-temperature hydrothermal reaction of sodium acetate, calcium chloride and sodium stearate in the pH regulator; a phase change temperature scope of the eutectic salt is reduced to 5-10 DEG C; a prepared product directly generates a self-organization framework toform the jelly-like eutectic salt, so that a thickening agent and a setting agent are not required to be added in a system; a degree of supercooling of the product is greatly reduced; and furthermore,since the ternary eutectic salt has a special structure, the ternary eutectic salt has the advantages of low lamination and supercooling possibility of an organic phase-change material and a high potential heat value of an inorganic phase-change material.

The invention provides an energy storage device. The energy storage device comprises a shell (121), a phase-change material (122) and a heat exchanger (123), wherein the shell (121) defines the spacefor containing the phase-change material (122); the heat exchanger (123) is used for carrying out heat exchanging on the phase-change material (122); the heat exchanger (123) comprises at least one set of heat exchanging units, and each heat exchanging unit comprises a heat exchanging body (125) containing a cold-loading medium; and the shell (121) comprises a heat dissipating reinforcement part (124), and the heat dissipating reinforcement part (124) dissipates the energy transmitted to the shell (121) by the phase-change material (122). According to the energy storage device, the contact area of the energy storage device and the space in a heat insulation box is increased through the heat dissipating reinforcement part, heat insulation equipment releases cold energy uniformly, the temperature fluctuation degree is small, the temperature control is precise, the cargo corrosion damage rate is reduced, and the cargo quality is effectively guaranteed.

The invention discloses a heat and electricity dual-purpose system based on hydrous salt chemical heat storage and a using method thereof. The system comprises a heat storage system, a first power generation system and a heat supply system. The heat storage system comprises a solar air heat collector, a reactor, a first heat exchanger, a gas-liquid separator, a heat preserving water tank and a flash chamber. The first power generation system comprises a turbine motor, a generator and a condenser. The heat supply system comprises a heat exchange coiler arranged in the reactor, a second heat exchanger and a water storing tank. According to the dual-purpose system, latent heat of steam condensing can be fully utilized through the first power generation system, the benefit is increased, and by selecting a suitable energy storing material and conforming to the actual operation situation, feasibility of work is improved. In addition, power generation and heat supply are brought into the whole system and used in parallel, and the system can be used for supplying electricity or heat according to needs during different hours.

The invention discloses an inorganic phase change energy storage material and a preparation method thereof. The energy storage material is mainly prepared from a sodium acetate solution and a function additive solution according to the weight ratio of 50:3-50:15, and a nucleating agent and a thickening agent which account for 1-3% and 4% of the total weight of the sodium acetate solution and the function additive solution respectively. The sodium acetate solution is formed by dissolving sodium acetate or hydrate of sodium acetate and water according to the molar ratio of 1:3. The function additive solution is prepared from function additives and water according to the mass ratio of 1:2. The function additives are a composition formed by potassium chloride and sodium chloride at any ratio. The energy storage material is stable in performance, low in cost, rich in raw material, convenient to prepare, large in phase change latent heat, free of toxicity, adjustable in temperature and capable of being widely applied to the fields of solar low-temperature heat storage systems, household daily heat preservation, household hot water energy storage systems and the like.

The invention discloses a phase change cold-accumulation material and a preparation method thereof. The phase change cold-accumulation material is prepared from, by mass, 50-60% of sodium sulfafe decahydrate, 10-15% of sodium bromide, 2-5% of ammonium chloride, 3% of aluminum oxide, 1-3% of sodium borate, 1-2% of boric acid, 4% of nanometer silicon dioxide, 2% of nanometer magnesium silicate and the balance deionized water. The preparation method comprises the steps of sequentially adding the sodium sulfafe decahydrate, the sodium bromide, the ammonium chloride, the sodium borate and the boric acid into a heating tank provided with a blender, conducting mixing and uniform stirring, controlling the mixture temperature within the range from 60 DEG C to 70 DEG C, conducting stirring till the mixture is molten completely, adding the aluminum oxide, the nanometer silicon dioxide and the nanometer magnesium silicate in the high-speed stirring process, replenishing the balance deionized water, stirring the mixture uniform, preserving the temperature for one hour at the temperature of 40 DEG C, cooling the mixture to be room temperature, and obtaining the uniform plasty fluid form phase change cold-accumulate material. Compared with the prior art, the phase change cold-accumulate material has the advantages of being high in potential heat value, stable in system, few in phase-change temperature hysteresis phenomenon, low in repeated cycling degradation and the like, raw materials are easy to obtain, the production is easy to conduct, the safety and nontoxicity are achieved, and the material has practical value in the field of heating, ventilation and air conditioning (HVAC).

The invention discloses a nanometer ice bag and a preparation method thereof. The ice bag is mainly prepared from 10 to 20 parts of nanometer aerogel powder, 1 to 3 parts of plant thickening agents, 1to 5 parts of emulsifying agents, 5 to 10 parts of balancing agents and 60 to 70 parts of water. The method comprises the following steps of a, adding water into the nanometer aerogel powder and theplant thickening agents; performing mixing and stirring to form a gel body; b, proportionally adding the emulsifying agents for thickening; c, adding balance medicine agents for debugging; d, preparing the materials into an aerogel body; e, performing supercritical drying; f, performing pressing shaping. Compared with the prior art, the prepared aerogel powder particle aerogel has light weight andbelongs to lightest solid; no volume is occupied; the processing is easy; the potential heat value is as high as 210 to 330 j/kg; the ventilation performance is good; the temperature slow release effect is good; the heat insulation and cold storage time is long.

The invention discloses an inorganic phase change energy storage material and a preparation method thereof. The energy storage material is mainly prepared from a sodium acetate solution, functional adding liquid, a nucleating agent and a thickening agent, wherein the weight ratio of the sodium acetate solution to the functional adding liquid is 50:3-50:15, the nucleating agent accounts for 1%-3% of the total weight of the sodium acetate solution and the functional adding liquid, the thickening agent accounts for 5% of the total weight of the sodium acetate solution and the functional adding liquid, the sodium acetate solution is prepared by dissolving natrium aceticum or aquo-complex thereof and water according to the molar ratio of 1:3, the functional adding liquid is prepared from a functional additive and water according to the mass ratio of 1:2, and the functional additive is sodium chloride. The energy storage material is stable in performance, low in price, rich in raw material, convenient to prepare, large in phase change latent heat, free of toxins, adjustable in temperature and capable of being widely applied to the fields of solar low-temperature heat storage systems, household daily heat preservation, household hot water energy storage systems and the like.

The invention discloses an ice and snow melting phase-change material for a road asphalt mixture and a production method thereof, and relates to the technical field of ice and snow melting phase-change materials. The raw material ratio (kg/m<3>) of phase-change wax to high-density polyethylene to polyacrylamide to stearic acid to sodium hydroxide is (40-55):(15-25):(10-15):(10-15):(5-7). The production method of the ice and snow melting phase-change material comprises the following steps: putting the phase-change wax in a stirrer according to the ratio and heating to 180-220 DEG C; then addingthe high-density polyethylene, the polyacrylamide and the stearic acid according to the ratio, mixing, uniformly stirring and then adding the raw materials into a forming machine. The ice and snow melting phase-change material for the road asphalt mixture and the production method thereof, disclosed by the invention, have the benefits that a phase-change heat storage mechanism is utilized, a potential heat value is higher, solar energy is absorbed by the phase-change heat storage mechanism, and at night or after snowing, the pavement temperature is automatically adjusted by releasing phase-change heat to realize the effect of melting ice and snow; road icing is avoided, the road safety is improved, and people can still pass safely in snowy days; the road service life can also be prolonged.

The invention relates to a phase change temperature control type silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared by the following method: step1, preparing materials in proportion; step 2, preparing a base material: adding vinyl silicone oil into a kneading machine, adding a flame-retardant phase change material while stirring, conducting vacuumizing for 1-3 hours at normal temperature after uniform mixing, taking out the base material, and conducting sealing for later use; and step 3, preparing a rubber material: taking the base material, adding vinyl silicone oil and hydrogen-containing silicone oil into the base material, conducting uniform dispersing, adding a catalyst and a tackifier, and conducting uniform mixing, defoaming, and packaging to obtain the phase change temperature control type silicone rubber. The phase-change temperature-control type silicone rubber prepared by the invention has a relatively high latent heatvalue, can well control the temperature within the range of 35-40 DEG C, has good human body hand feeling experience, and particularly has good temperature control performance within the range of 35-40 DEG C. Other physical and chemical properties are good, and the method is suitable for the packaging process of electronic equipment.

The invention discloses a luggage compartment gel cool storage agent including the following raw materials by mass: 5-9% of acrylic acid, 15-21% of sodium chloride, 9-12% of ethyl acetate, 2-6% of nano silicon dioxide, 3-8% of maltodextrin and balance of water. At room temperature, the acrylic acid and the ethyl acetate are added into water, sealed and mixed; the temperature rises up to 40-50 DEG C, then the maltodextrin is added, sealed and mixed, the temperature rises up to 85-90 DEG C, the nano silicon dioxide is added, sealed and mixed, and the luggage compartment gel cool storage agent is obtained by cooling to room temperature. The luggage compartment gel cool storage agent is gelatinous, non-toxic, tasteless, safe, reliable, effective, environmentally friendly, simple in preparation method, wide in raw material sources, and low in cost; the experiment proves that the luggage compartment gel cool storage agent has the appropriate phase change temperature and larger phase change latent heat, the phase change temperature is-10 to 1 DEG C, the phase change latent heat is 260 KJ/Kg-285 KJ/Kg, and the luggage compartment gel cool storage agent is especially suitable for luggage compartments.

The invention relates to a cold accumulation module and a cold storage with the same. The cold accumulation module comprises a shell which is of a hollow structure with two open ends, two end covers arranged at the two ends of the shell in a covering manner and encircling with the shell to form a receiving cavity capable of being filled with a cold accumulation material, and a refrigeration pipe used for filling a refrigerant and comprising a pipe body and pipe joints arranged at the two ends of the pipe body, wherein the pipe body is arranged in the receiving cavity, the two pipe joints are arranged on any of the two end covers in a penetrating manner respectively, and the pipe body communicates with an external refrigeration pipeline through the pipe joints. According to the cold accumulation module, objects can still be refrigerated by virtue of the energy stored by the cold accumulation material in the case of power failure through arranging the receiving cavity capable of being filled with the cold accumulation material, and arranging the refrigeration pipe in the receiving cavity. Moreover, cold accumulation can be carried out on the cold accumulation material during slack periods of electricity utilization, and the stored energy is used during peak periods of electricity utilization, thus the peak periods of electricity utilization, with high electric charges, are avoided, and the cost of power consumption is reduced.

The invention discloses a shape-stabilized phase change material taking alumina hollow spheres as a carrier. The material is composed of the following raw material components in percentage by mass: 38.39%-39.18% of paraffin, 46.07%-46.67% of alumina hollow spheres and 14.74%-14.94% of styrene-acrylic emulsion, totaling 100%. The shape-stabilized phase-change material solves the problems of poor thermal performance, low strength and the like of the existing shape-stabilized phase-change material, and has the characteristics of excellent heat storage performance, high heat exchange efficiency and good strength. The preparation method provided by the invention solves the problems of poor thermal performance, complex preparation process and high cost of the existing shape-stabilized phase change material.

The invention relates to the field of phase change energy storage, and particularly provides a composite phase change material for clean heating and a preparation method thereof. The heat storage material comprises the following raw materials in parts by mass: 70-90 parts of magnesium nitrate hexahydrate, 3-20 parts of an organic acid sodium salt and 3-10 parts of a nucleating agent. The compositephase change material provided by the invention has the advantages of small supercooling degree, large latent heat of phase change, high stability, no phase separation, simplicity in preparation, andconvenience in packaging and industrial production.

The invention discloses a high-latent-heat medium-temperature composite phase change material based on nano heat conduction enhancement and a preparation method thereof, and belongs to the field of phase change heat storage materials. A novel eutectic salt system is designed and developed through a theoretical calculation-phase diagram calculation method, villiaumite with high latent heat and carbonate are compounded with high-latent-heat multi-element eutectic salt, and nano AlN with high heat conductivity and light weight is used as a heat conduction reinforcing material, and a solid nano layer on the surface of a nano-particle medium can reinforce the heat conduction performance of the eutectic salt. The method overcomes the defects that a traditional trial-and-error method-preparation method is tedious, low in efficiency and the like, and the design and preparation cost of the eutectic salt is reduced; and the prepared phase change material overcomes the problems of low heat storage density, low heat storage efficiency and the like of the phase change heat storage material in the prior art.

The invention discloses a preparation method of a heat storage material, which comprises the steps of mixing solid paraffin, liquid paraffin, hexadecylamine and nano aluminum nitride step by step, controlling conditions such as temperature and pressure during preparation, and finally packaging. The heat storage material has the advantages of wide phase change temperature, low melting point, high latent heat, good thermal conductivity, low cost and difficult leakage.

The invention discloses a preparation method of a molten salt porous silicon-based composite phase change heat storage material. The preparation method comprises the following steps: firstly, respectively crushing mixed molten salt and a porous silicon-based carrier material by using a supersonic crusher, and putting the crushed materials into a constant-temperature drying box for later use; then respectively taking out the mixed molten salt and the porous silicon-based carrier material from the constant-temperature drying box, preliminarily mixing, and stirring again by using an electronic stirrer, so that the mixed molten salt and the porous silicon-based carrier material are fully and uniformly mixed; carrying out compression molding on the uniformly mixed molten salt and the porous silicon-based carrier material by using a constant-stress pressure testing machine; and sintering the pressed and molded silicon-based composite material in a muffle furnace, and directly cooling to room temperature in the muffle furnace after sintering is finished, so as to obtain the molten salt porous silicon-based composite phase change heat storage material. The prepared composite phase change heat storage material has the advantages of being low in heat storage cost, high in melting latent heat value, high in decomposition temperature, high in mechanical strength, good in heat stability and chemical stability and the like, and can be used for a solar thermal power generation system.

A spray cooling system for a high-power lithium ion power battery pack comprises a spray system, a condensation system and a data acquisition system, wherein the spray system comprises a compressor, a condenser, a liquid storage tank for storing a refrigerant, a filter, a throttle valve, a spray cavity for placing a power battery and a gas-liquid separator which are sequentially connected through pipelines; a spraying pipe is arranged in the spraying cavity; the condensation system comprises a thermostatic bath in loop connection with the condenser, and a water pump and a flow meter are arranged in the loop; and the data acquisition system comprises temperature sensors arranged in the refrigerant circulation channel and the water circulation channel, and a pressure sensor and a data acquisition instrument which are arranged in the refrigerant circulation channel. Phase change spray of the refrigerant can be used for cooling the power battery, the surface heat of the power battery is absorbed through phase change latent heat of the refrigerant so as to reduce the surface temperature of the battery, and the method is high in heat dissipation capacity and can meet the thermal management requirements of high-power lithium ion power batteries with high temperature, quick charge and the like.