1887 results about "Heat storage material" patented technology

The invention relates to a medium-high temperature (120-1000 DEG C or higher) composite structural heat storage material. The medium-high temperature composite structural heat storage material comprises an inorganic salt phase change latent heat material, a sensitive heat storage material and a heat conduction reinforcing material, wherein the mass ratio of the inorganic salt phase change latent heat material to the sensitive heat storage material is of 1: (0.1-10); and the heat conduction reinforcing material is of 0.0001-1kg/ (kg heat storage material) based on mass ratio. The preparation method comprises steps as follows: uniformly mixing the inorganic salt phase change latent heat material with the sensitive heat storage material and the heat conduction reinforcing material; pressurizing to form green blank; and then heating and sintering, so as to obtain the medium-high temperature composite structural heat storage material. The medium-high temperature composite structural heat storage material provided by the invention is capable of obviously reducing the corrosion resistance of the sensitive heat storage material; meanwhile, the thermal conductivity of the composite heat storage material is markedly improved by virtue of the micro-nano doping of the heat conduction reinforcing material; and moreover, high heat storage density is achieved, and wide application prospect is provided.

The invention relates to an inorganic hydrated salt expanded graphite composite phase-changing heat storage material. In the preparation method thereof, 85-89 mass parts of inorganic hydrated salt sodium acetate trihydrate as a heat storage matrix, 5.5-6.5 mass parts of disodium hydrogenphosphate as a nucleating agent, 2.5-3.5 mass parts of carboxymethyl cellulose as a thickening agent, and 3-4.5 mass parts of expanded graphite is blended in an inorganic hydrated salt mixture as a material with a high thermal conductivity. Due to the use of the expanded graphite, the material not only maintains excellent properties of natural flake graphite such as good thermal conductivity, no toxicity and the like, but also has adsorbability which the natural flake graphite does not have. The invention solves the problems of sub-cooling degree, phase stratification and low thermal conductivity during the heat storage process. The composite phase-changing material has a low sub-cooling degree after the phase changing performance is improved, the solution thereof is uniform without sedimentation and stratification during the solid-liquid phase change, the performance is stable, the repeatability of good, and the phase-changing heat storage can be enhanced through improving the thermal conductivity of the material.

The invention discloses a baking tray and a baking oven, wherein the baking tray comprises a metal article carrying body and a heat storage body; the upper surface of the metal article carrying body is used for carrying food materials to be baked, so that the heat of a heating device of the baking oven can be conducted to the food materials to be baked; and the heat storage body is made of heat storage materials and is in heat conduction connection with the metal article carrying body. According to the technical scheme provided by the invention, the heat is transferred to the food materials through the metal article carrying body; the heating on the food materials is realized, so that the fast heat conduction on the food materials can be realized; the heat storage body can store heat; when the heating device of the baking oven stops heating, the heat stored by the heat storage body is used for continuously conducting heat to the metal article carrying body to realize the heating on the food materials; on one hand, the mouthfeel of the food materials is improved; and on the other hand, the utilization rate of the heat of the baking oven is improved.

The invention relates to a composite amorphous phase-change heat storage material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is prepared from a porous material used as a support material and an inorganic hydrous salt used as a phase-change material in manners of absorbing the inorganic hydrous salt into a porous structure of the support material by virtue of the capillary adsorption action of the porous material, and self-assembly of a surfactant. The method comprises the following steps: firstly, emulsifying and dispersing the molten inorganic hydrous salt phase-change material such as calcium chloride hexahydrate by the emulsifying dispersion effect of the surfactant under an ultrasonic condition, so as to form a stable emulsion; adding expanded graphite to the emulsion to evenly disperse; putting the mixture into a vacuum oven, vacuumizing and keeping in a constant state for 30 minutes at room temperature, so as to prepare a novel composite amorphous phase-change heat storage material which is high in phase-change latent heat, good in heat-conducting property, and low in cost.

The invention discloses an Al/Al2O3 heat storage material and a preparation method thereof. Aluminum oxide serves as a base material; and a spherical metallic aluminum 'core' is enclosed by a layer of aluminum oxide 'enclosure'. In the process of heat storage, metallic aluminum can absorb heat to be changed from a solid state to a liquid state and the temperature of the metallic aluminum rises; at the same time, the external aluminum oxide layer also can absorb the heat, so that the temperature of the external aluminum oxide layer rises; and in the process of heat transfer, the liquid metallic aluminum releases both hidden heat and sensible heat and the aluminum oxide enclosure releases the sensible heat. The preparation process of the Al/Al2O3 heat storage material is obviously different from a conventional method, and comprises the following steps of: atomizing the liquid metallic aluminum (above 660 DEG C) into tiny particles with an atomizing device; and cooling the tiny liquid metallic aluminum particles in an oxidizing atmosphere and oxidizing the external aluminum oxide layer to form the Al/Al2O3 phase-change heat storage material taking the metallic aluminum as the 'core' and taking aluminum oxide as the 'enclosure', wherein the oxidizing atmosphere may adopt oxygen, water vapor, carbon dioxide or air diluted by an inert gas. The preparation method is simple and easy to realize large-scale production.

The present invention relates to a high heat conductivity shaped phase change heat storing material suitable for large scale production, and belongs to the field of phase change material for building. The present invention consists of phase change heat storing material paraffin of phase change temperature 15-70 deg.c in 50-80 wt%; high molecular weight support material polyethylene, polypropylene, SBS and/or SEBS in 10-30 wt%; machining modifier alumina, montmorillonite, diatomite, clay, titania powder, calcium carbonate, bentonite and/or silica in 5-20 wt%; and heat conducting additive metal powder or graphite powder 5-15 wt%. The material may be well produced in large scale, has excellent heat conducting performance and is especially suitable for use in building.

The present invention provides a latent-heat storage type adsorbent composition for canisters that can effectively prevent changing in temperature due to the heat of absorption/desorption and has a high butane working capacity; a process for producing the adsorbent; and a canister employing the latent-heat storage type adsorbent composition for canisters. The present invention relates to a latent-heat storage type adsorbent composition for canisters which compromises an adsorbent adsorbing a fuel vapor and a heat-storage material comprising microencapsulated phase-changing material which absorbs or releases latent heat in response to temperature change, and a method for producing such an adsorbent.

The invention relates to a setting phase change energy storage material with high-thermal conductivity and a preparation method thereof, belonging to the field of phase change heat storage materials. The setting phase change energy storage material with high-thermal conductivity is characterized by containing 65-90 percent by mass of paraffin substances as a phase-change material, 9-34 percent by mass of high-density polyethylene as a support material and 1-7 percent by mass of expanded graphite as a heat conduction intensifier; a method for adding a proper amount of expanded graphite to paraffin/high-density polyethylene in a molten state is adopted to enable the heat conductivity of the setting phase change material to be increased to 1.35W/(m.K) or higher. The method comprises the following steps of: heating to melt the paraffin substances with the mass percent of 65-90 percent, and heating to enable the temperature of the liquid paraffin to reach 120-190 DEG C; adding high-density polyethylene with the mass percent of 9-34 percent and the expanded graphite with the mass percent of 1-7 percent to the liquid paraffin, and then melting and evenly stirring in vacuum; putting the mixture in a hot mould for pressing and molding; taking the mixture from the mould after naturally cooling. The setting phase change material has high thermal conductivity, does not need to be packaged in containers and can directly contact heat-transfer media.

The invention discloses a mesoporous material-based composite phase change heat storage material and a preparation method thereof. The composite phase change heat storage material, which can still keep fixed shape even at the temperature higher than the melting point of phase change substance by 30 DEG C, is prepared by using mesoporous material as carrier matrix and organic substance as phase change substance according to methods of physical blending and impregnation. Compared with other technologies, reported in documents, for the preparation of shape-fixed composite phase change material, the preparation technology has the characteristics of great simplicity and saving time, and the prepared composite phase change heat storage material has high content of the phase change material, high latent heat of phase change and utilization rate of the latent heat, and obviously lowered phase change temperature.

The invention provides a packaging shape-stabilizing method of an inorganic hydrated salt phase-change heat storage material, which comprises the following steps: (1) adding a nucleator and deionized water into the inorganic hydrated salt phase-change material, and heating until the inorganic hydrated salt phase-change material achieves the molten state; (2) adding a porous propping material into the molten-state inorganic hydrated salt phase-change material, and stirring sufficiently and uniformly; (3) putting the molten-state mixture obtained in the step (2) in a vacuum environment to enhance the adsorptivity of the porous propping material for the inorganic hydrated salt phase-change material; and (4) moving the molten-state mixture out of the vacuum environment, and immediately putting the molten-state mixture into a low-temperature environment suitable for crystallization to perform recrystallization. The composite shape-stabilized phase-change material obtained by the method has the advantages of stable structure, high latent heat, no toxicity, simple preparation process, short time consumption and low cost.

The invention provides a solar heat collector system which comprises a heat collector, a heat storage device, a water outlet pipe and a water return pipe. The heat collector and the heat storage device are connected through a pipeline, the heat storage device comprises a shell, a heat storage material is arranged in the shell, a water pipe of the solar heat collector system is arranged in a heat storage material, the water pipe is of a coiler structure, heat exchange is carried out between water in the water pipe and the heat storage material, and absorbed solar energy is transmitted to the heat storage material and then is returned to the heat collector for heating. The solar heat collector system has an automatic heat storage function, can effectively make use of excess solar energy, and achieves the effects of energy conservation and environment protection.

The invention relates to a solar energy heat storage device, in particular to a solar energy heat storage device using gas as heat transfer medium, comprising a housing of a heat storage chamber, thermal insulation material (2), a metal pipeline (4), a holding frame (5), an inlet pipe (6), an outlet pipe (7) and a door of the heat storage chamber (8). The solar energy heat storage device is characterized in that the housing of the heat storage chamber is composed of an outer wall of the heat storage chamber (1) and an inner wall of the heat storage chamber (3); the door (8) and the inner wall (3) of the heat storage chamber form a sealed heat storage space; the inlet pipeline (6) and the outlet pipeline (7), communicated with the heat storage space respectively, are positioned asymmetrically on the housing of the heat storage chamber; at least one layer of the holding frame (5) is positioned in the heat storage space; the holding frame (5) is fixedly connected with the inner wall of the heat storage chamber (3); the metal pipeline (4) is positioned on the holding frame (5); the heat storage material is encapsulated in the metal pipeline (5); the heat transfer medium in the heat storage space is gas. The olar energy heat storage device has the advantages of simple structure, and high efficiency, suitability for using gas as the transfer medium.

The invention discloses a composite phase change heat storage material and a preparation method thereof. The composite phase change heat storage material is characterized by comprising the following materials in parts by weight: 39.4-40.3 parts of saturated sodium sulfate decahydrate solution, 0.8-1.2 part of nucleating agent, 1.2-2 parts of thickening agent, 23.6-24.0 parts of solid paraffin, 1.2-2.4 parts of heat-conducting filler, 17.8-18.6 parts of expanded perlite and 13.6-13.9 parts of distilled water, wherein a 40 DEG C saturated sodium sulfate decahydrate solution containing the nucleating agent and the thickening agent is adsorbed into the expanded perlite by employing a vacuum absorption method and then is sealed by employing industrial solid paraffin after adsorption is finished, and the heat-conducting filler is added in the sealing process. The composite phase change heat storage material has the advantages that after being modified and micro-packaged, the composite phase change heat storage material has low supercooling degree, the solution is uniform and not layered during solid-liquid phase change, the performance is stable, the repeatability is high, the service life is prolonged, and the composite phase change heat storage material can be widely applied to actual building energy conservation engineering.

Systems and methods for storing and retrieving thermo-mechanical energy are disclosed. The systems and methods generally include a thermodynamic loop or cycle (e.g., a reversible transcritical, trilateral, or Rankine/vapor compression cycle) that works as a heat pump in a charging mode and as a heat engine in a discharging mode. The thermodynamic loop or cycle includes a gas pressure changing device, a liquid pressure changing device, and a working fluid. The system further includes one or more heat storage devices with solid heat storage material(s). Heat is transferred between the working fluid and the solid heat storage material(s) in the high and low pressure sides of the thermodynamic cycle, respectively.

The present invention includes a heat storage granule having a plurality of microcapsules mixed with a binder and granulated into the heat storage granule. Each of the microcapsules may have an outer case and a phase change material contained therein. The outer case may be made of synthetic resin. The phase change material can absorb and dissipate latent heat in response change in temperature. The heat storage granule may have a cover layer that has heat conductivity and resistance against alcohol, both of which may be higher than those of a thermosetting resin or a thermoplastic resin.

The utility model relates to a tank-free flat type phase change heat storage solar heat utilization unit, which is applied to the field of medium-low temperature solar heat utilization. The tank-free flat type phase change heat storage solar heat utilization unit is characterized by comprising a metal shell, a metal container, heat exchanging pipelines, a thermoelectric couple, an auxiliary heating plate, and a double-layer transparent vacuum cover plate; the metal container is arranged in the metal shell; a sealed insulating cavity is formed between the metal container and the metal shell; the heat exchanging pipelines are situated in the metal container, and are arranged into 2-10 layers; the thermoelectric couple and the auxiliary heating plate are arranged in the metal container; a phase change heat storage material is sealed in the metal container; the heat exchanging pipelines, the thermoelectric couple, and the auxiliary heating plate are all buried into the phase change heat storage material; a selective absorption coating is sprayed on the upper surface of the metal container; and the double-layer transparent vacuum cover plate is covered on the metal container. The tank-free flat type phase change heat storage solar heat utilization unit has the characteristics of convenient installation and connection, and higher heat storing/exchanging efficiency.

The invention discloses an indoor geothermal heating structure utilizing a capillary network and a phase-change thermal storage material, which belongs to the technical field of solar building heating. The structure includes a floor decoration layer, an upper phase change material, a capillary grid, a lower phase change material, a reflection film, an insulation layer and a floor base layer from top to bottom. The floor decoration layer is supported by dragon frames laid on the insulation layer, the dragon frames pass through the tube gaps of capillary grids, and the phase change material layers are arranged between adjacent dragon frames. The hot water from the low-temperature heat source exchanges heat with the upper and lower phase-change materials in the capillary, and supplies heat to the room through the floor decoration layer; at night, the phase-change material solidifies and releases heat to supply heat to the room through the floor decoration layer. The indoor geothermal heating structure of this capillary network and phase change heat storage material has the characteristics of large heat exchange area, uniform temperature, fast start-up, less space occupation, more flexible layout, and convenient installation. The indoor temperature is uniform, and the indoor thermal comfort is good. Wide application prospects and promotion value.

The present invention relates to a heat storage material composition comprising 20 to 100% by weight of a heat storage material, 80 to 0% by weight of crystalline polyolefin (B) and 50 to 0% by weight of an elastomer (C), and the heat storage material described above contains a side chain-crystalline polymer (A), wherein the heat storage material described above comprises preferably a higher α-olefin polymer (a) containing 50 mole % or more of higher α-olefin having 10 or more carbon atoms and a petroleum wax (b) in which a melting point (Tm) is higher by 10° C. or more than that of the polymer (a). Provided is a heat storage material composition which has less bleeding and stickiness and is excellent in stability at high temperature and which can meet a change in temperature such as a difference in room temperature when applied to a material for floor heating and can avoid a heating state deviated to high temperature or low temperature.

The invention discloses a solar phase change heat storage heating and hot water supply system. The system mainly comprises a solar thermal collector (1), a supplementary heat source (2), a solar circulating pump (4), a phase change heat storage box (5), a plate-type heat exchanger (6), a heating circulating pump (9) and a heating end (10) which are connected through water pipes and are regulated through arranging a valve, wherein the solar thermal collector is connected with the supplementary heat source in series or in parallel; phase change materials within 0-100 DEG C are adopted by the phase change heat storage box according to requirements; when the system is just started, the solar thermal collector directly exchanges heat with heating return water through the plate-type heat exchanger; when residual heat exists, the residual heat is firstly stored in the phase change heat storage box; and when solar radiation is not enough, the residual heat exchanges heat with the heating return water. With the adoption of the solar phase change heat storage heating and hot water supply system, a manner of combining various pipelines and various valves of the solar thermal collector, and the characteristics of large heat storing amount of the phase change heat storage material and stable heat storage temperature are utilized, so that the defect that the solar radiation is not stable is solved, the supplementary heat source starting time is shortened, the energy is saved, and the environment is protected.

The invention discloses an intelligent on-vehicle mobile type phase-change heat storage and supply system. The system comprises a tractor and a phase-change heat storage and exchange device, wherein the phase-change heat storage and exchange device is fixedly arranged on the tractor, and comprises a box body; a box body water temperature gauge and a phase-change heat storage material temperature gauge are arranged on the back wall of the box body; a heating pipe group, a cold water inlet pipe, a phase-change heat storage component and a hot water outlet pipe are arranged in the box body in turn from bottom to top; and a bottom water outlet of the box body and the hot water outlet pipe on the upper part of the box body are connected to a same water main through pipelines. The intelligent on-vehicle mobile type phase-change heat storage and supply system provides hot water supply and heating services for heat energy users by using residual heat or waste heat discharged in the form of steam by high energy consumption units such as heat power plants, iron and steel works and the like, and has the characteristics of simple and compact integral structure, high space utilization ratio, high energy storage density, high heat exchange efficiency, intelligent control, stable, safe and reliable operation, convenience for maintenance and operation management and the like.