33results about How to "Efficient heat storage" patented technology

The invention discloses a heat-storage rear wall of a solar greenhouse, which comprises an inner maintenance wall A of the rear wall of the solar greenhouse, an exterior maintenance wall B of the rear wall of the solar greenhouse, a polystyrene insulation board, plain soil or sand D backfilled in the rear wall of the solar greenhouse, C20 reinforced concrete cast-in-place slab E and rear wall ventilation ducts F built with hollow building blocks. In the design of the rear wall, the rear wall ventilation ducts F built with the hollow building blocks are mainly used for heat exchange. When interior temperature of the solar greenhouse rises to a certain value, heat and moisture in hot and humid air passing the ducts are exchanged and stored in the rear wall by the hollow building blocks. When the interior temperature of the solar greenhouse drops, solar energy stored in the rear wall is released in air inside the greenhouse by heat exchange. Heat simply used for rising of the interior air temperature of the solar greenhouse is little, so that the interior temperature of the solar greenhouse can be increased effectively through the heat-storage rear wall. The solar greenhouse with the heat-storage rear wall has the advantages of reasonable structure, simplicity in manufacture and operation, high solar utilization rate and the like.

The invention discloses an all-weather solar power generation method and system based on whole-process pressure operation. The system comprises a solar heat collection field, a heat storage and release system and a steam power generation system. The solar heat collection field comprises solar heat collectors, low-temperature heat-transfer medium mother pipes and high-temperature heat-transfer medium mother pipes. The heat storage and release system and the steam power generation system are connected between the low-temperature heat-transfer medium mother pipes and the high-temperature heat-transfer medium mother pipes in a parallel manner. Each heat storage tank body of the heat storage and release system is internally provided with a top padding area, one or more middle padding areas and a bottom padding area, wherein each top padding area, the corresponding middle padding areas and the corresponding bottom padding area communicate with one another in sequence; and each padding area is provided with a corresponding inlet switching valve. According to the method, the double-loop system with heat transfer and heat storage separated is adopted; a heat-transfer medium absorbs solar energy cyclically in the solar heat collection field and exchanges heat with an energy storage medium in the heat storage and release system so that heat energy can be stored or obtained; steam is produced in the steam power generation system, so that power generation is conducted; meanwhile, a pressure gas medium is adopted as the heat-transfer medium; and the heat storage and release effect and power generation efficiency are improved.

The invention discloses an all-weather solar power generation method and system based on gas enhanced heat transfer. The system comprises a solar heat collecting field, a heat storage and release system and a heat engine enhanced operation system; the solar heat collecting field comprises a solar heat collector, a main low-temperature heat-transfer medium pipe, and a main high-temperature heat-transfer medium pipe; the heat storage and release system and the heat engine enhanced operation system are connected between the main low-temperature heat-transfer medium pipe and the main high-temperature heat-transfer medium pipe in parallel; a heat storage tank of the heat storage and release system is internally provided with a top packing area, a middle packing area and a bottom packing area; and the heat engine enhanced operation system comprises a heat expansion machine, a power generator and the like. According to the method, the double-loop system with heat transfer separated from heat storage is adopted, heat-transfer media absorb solar energy circularly in the solar heat collecting field and exchange heat with energy storage media in the heat storage and release system so that heat energy can be stored or obtained, meanwhile, gas mixed with solid particles is used as the heat-transfer media, does work through expansion in the heat engine enhanced operation system after being filtered so that power can be generated, and the heat transfer efficiency is improved.

The invention discloses a ceramic solar modular phase change heat storage sunlight greenhouse and a phase change solution thereof. A rear greenhouse wall comprises a heat preservation thermal insulating component, a rear greenhouse wall steel structure component and a solar ceramic phase change component, wherein the solar ceramic phase change component comprises a ceramic solar panel and a ceramic solar panel water returning pipeline; the heat preservation thermal insulating component, the rear greenhouse wall steel structure component and the ceramic solar panel form a rear greenhouse wall body structure; the ceramic solar panel water returning pipeline communicates with the inner cavity of the ceramic solar panel and is arranged inside the rear greenhouse wall steel structure component; the ceramic solar panel water returning pipeline is filled with the phase change solution. The ceramic solar modular phase change heat storage sunlight greenhouse can be rapidly manufactured and assembled in a modular manner, meanwhile heat can be stored and released actively by using a fan assembled on the rear greenhouse wall, and furthermore heat can be directly acquired from sunshine by using a liquid phase change material inside the rear greenhouse wall.

The invention discloses a novel combined cooling, heating and power generation system based on a movable solar heat collector, which belongs to the technical field of organic Rankine cycle. The novel combined cooling, heating and power generation system based on movable solar heat collectors includes a first-level organic Rankine cycle module, a second-level organic Rankine cycle module, a mobile solar heat collection module and an absorption refrigeration module; a first-level organic Rankine cycle module The Ken cycle module includes the first evaporator, the first steam turbine generator set, the first condenser and the first working medium pump, and the initial heat source used by the first evaporator is geothermal fluid; the secondary organic Rankine cycle module includes the second evaporator , the second steam turbine generator set, the second condenser and the second working medium pump, the second evaporator is connected with the first evaporator; the mobile solar heat collection module includes a movable solar heat collector, a thermal storage tank and a third working mass pump, the absorption refrigeration module includes a generator, a third condenser, a third evaporator, an absorber and a solution heat exchanger.

The invention relates to a thermodegradable polypropylene gradient phase change heat storage material and a preparation method thereof. A compound phase change material with multiple phase change points is formed by two or more phase change materials with different solid-liquid phase change points and belongs to the technical field of phase change materials and heat storage thereof. Polypropyleneis multi-degraded by using a thermodegrading method to obtain low molecular weight polypropylene wax with various molecular weights or melting points, and the gradient phase change heat storage material is formed. The phase change heat storage material has multiple solid-liquid phase change points.

The invention discloses a solar greenhouse micro-heat pipe array heat storage wall and a preparation method thereof and belongs to the technical field of agricultural facilities. The heat storage wall is sequentially composed of a heat insulation layer, a bearing building block layer, a micro-heat pipe module layer and a cement mortar layer from exterior to interior. The micro-heat pipe module layer is formed by building micro-heat pipe building blocks and building block bricks. Each micro-heat pipe building block is formed in the mode that condensation segments of a plurality of Z-shaped micro-heat pipes are arranged in parallel and inserted into a die and concrete is added for pouring and maintaining. Each micro-heat pipe is formed in the mode that an aluminum plate is stamped, a plurality of parallel micro-groove channels are formed in the aluminum plate and then filled with a proper amount of working medium and then sealing is carried out. By combining the requirements for uniformity of heat storing and releasing of the greenhouse wall, the micro-heat pipe building blocks are distributed in an arrayed mode, and the micro-heat pipe array heat storage wall is formed. By means of the micro-heat array technology, the diurnal solar energy is quickly transferred into the greenhouse wall, the heat storage capacity of the interior of the wall is improved, the stored heat energy is released in time at night according to needs of the heat environment in the greenhouse, and therefore the regulating capacity of the solar greenhouse wall for the heat environment in the greenhouse is improved, and the utilization rate of the solar energy by the greenhouse is increased.

The invention relates to the technical field of change materials and heat storage thereof, in particular to a gradient phase change heat storage body and a preparation method thereof. Each group of gradient phase change units in the present invention includes a cylindrical outer phase change layer, a cylindrical inner phase change layer, and a heat-conducting separation film, and the heat-conducting separation film is arranged between the cylindrical outer phase change layer and the cylindrical inner phase change layer. During the interval, the phase change temperature of each layer of phase change material from the inside to the outside decreases sequentially from high to low. When there are more than one gradient phase change unit group, a thermally conductive separation film is provided for each two gradient phase change unit groups. The high and low temperature difference naturally formed from the inside to the outside of the present invention can be correspondingly exchanged by the phase change heat storage body from the inside to the outside.

Provided is a heat storage device which has a simple and small shape that does not occupy a space when mounted on an electric vehicle, and which can efficiently store and dissipate heat without using water when used as a heating device. The heat storage device (10) is provided with a heat storage material (14) that is oxidized / reduced by a temperature adjustment operation; a heat transfer material (15) that heats the heat storage material (14); and at least one pair of electrodes (11, 12) that heat the heat transfer material (15) by being connected to a power source. A container (16) containing a heat storage material (14), a heat transfer material (15) and at least one pair of electrodes; an upstream-side valve (17) which is provided at an upstream-side inlet of the container (16) and which isolates the inside and outside of the container (16); and a downstream-side valve which is provided at a downstream-side outlet of the container (16) and which isolates the inside and outside of the container (16).

The invention provides a phase-change energy storage dry power mortar based on construction and household garbage and a preparation method thereof. The preparation method comprises the following steps: smashing the construction garbage concrete and rubber, respectively, and performing grinding and filtering to obtain powder; drying straw and performing incinerating to obtain straw ash; cutting paraffin into paraffin powder, mixing the paraffin powder with the rubber and concrete powder and, heating the mixed powder in a reactor, performing vacuumizing, allowing the vacuumized material to stand and performing cooling; immerging the cooled material into a water glass adhesive, performing stirring and adding the straw powder, and performing stirring, drying and smashing to obtain a phase change composite material; and mixing the phase change composite material with portland cement, construction recycling sand, a water reducer and cellulose ether uniformly to obtain the phase change energy storage dry powder mortar based on the construction and household garbage. The method improves the garbage functionality by using a simple method, and has the advantages of good economic performance, greenness and environmental protection. The obtained dry power mortar meets the using requirement.

The invention relates to a preparation method of a high-efficiency heat storage unit based on graded hole ceramics, which is characterized in that it includes the following steps: 1) designing graded hole structure parameters: designing and selecting graded hole structure parameters according to Murray's law, a complete graded hole The structural heat storage unit is composed of multi-level holes, and each level of holes is divided into k n Secondary holes, the relationship between the aperture D of each level of holes satisfies Murray's law (D n 3 =k n ·D n+1 3 ); 2) preparation of grade hole ceramic matrix: with cermet TiB 2 Powder is the main raw material, and 1~3wt% Si is added 3 N 4 , using ceramic 3D printing to form a ceramic body with a hierarchical pore structure, and firing it at 1600-1750°C in an argon atmosphere to obtain a ceramic matrix with a hierarchical pore structure; 3) Building a heat storage unit: using the above-mentioned ceramic matrix with a hierarchical pore structure as a skeleton, It is filled with molten salt or alloy with a phase transition temperature of 500°C to 700°C, and packaged to obtain a high-efficiency heat storage unit based on hierarchical porous ceramics. The heat storage unit prepared by the method has the advantages of high heat storage density and high heat transfer and heat exchange efficiency.

The invention relates to a gradient phase change heat storage material and a preparation method thereof, and belongs to the technical field of phase change materials and heat storage thereof. Polylactic acid is subjected to multi-stage degradation by adopting a biodegradation method to obtain low-molecular-weight polylactic acid with multiple molecular weights or melting points, and a gradient phase change heat storage material is formed which has multiple solid-liquid phase change points.

The invention discloses a phase change waste heat recovery ventilator for a solar greenhouse. The phase change waste heat recovery ventilator for the solar greenhouse comprises a composite phase change heat exchange box. A heat exchange fin tube and an axial flow fan are arranged in the composite phase change heat exchange box, wherein the axial flow fan is arranged on one side of composite phase change heat exchange box, the heat exchange fin tube is arranged on the other side of the composite phase change heat exchange box, an inner wall of a composite phase change heat exchange box body is provided with communicated cavities, fluid composite phase change heat storage materials are arranged in the cavities, and the fluid composite phase change heat storage materials flow freely in the cavities of the inner wall of the box body. An upper cavity and a lower cavity of the composite phase change heat exchange box body are communicated through the heat exchange fin tube, and the inner wall of the composite phase change heat exchange box which is below the heat exchange fin tube is further provided with a condensation gutter. The phase change waste heat recovery ventilator for the solar greenhouse is suitable for installation in a greenhouse building, is matched with the growth level of the plants in the greenhouse and greatly improves the building performance and the production capacity of the solar greenhouse. The phase change waste heat recovery ventilator for the solar greenhouse is reasonable in structure, compared with an existing greenhouse, the cost is not increased, and the thermal storage and heat preservation standards of the greenhouse can be improved greatly.

The invention discloses a phase change thermal storage material and a manufacturing method thereof. The material is formed by the way that 40-45wt% of silicon oxide, 9-11wt% of aluminium oxide, 0.06-0.3wt% of ferric oxide, 0.2-0.5wt% of calcium oxide, 0.05-0.4wt% of magnesium oxide, 3-4wt% of potassium oxide, 3-5wt% of sodium oxide and 6-11wt% of zinc oxide are uniformly ground and then are uniformly mixed with 22.8-38.69wt% of water.

The invention relates to a gradient phase change heat storage material and a preparation method thereof, belonging to the technical field of phase change materials and heat storage. The present invention adopts a biodegradation method to degrade polylactic acid in multiple stages to obtain low molecular weight polylactic acid with various molecular weights or melting points, and forms a gradient phase change heat storage material with multiple liquid transition point.

The invention relates to a shell-structure heat storage magnetic material and a preparation method thereof. The shell-structure heat storage magnetic material comprises a core body, a heat storage inner layer and a magnetic outer layer, wherein the core body is in a spherical shape, the heat storage inner layer wraps an outer layer of the core body, the magnetic outer layer wraps an outer layer ofthe heat storage inner layer, the material of the core body is n-octadecane, the material of the heat storage inner layer is a methyl methacrylate-methacrylic acid polymer, and the material of the magnetic outer layer is ferrosoferric oxide. High-efficiency heat storage is achieved by employing the n-octadecane and the methyl methacrylate-methacrylic acid polymer, the ferrosoferric oxide is synthesized on a surface of the methyl methacrylate-methacrylic acid polymer to form integration of heat storage and magnetic effect, the saturation magnetic intensity of the synthesized heat storage magnetic material is 12.5 emu.g<-1>, and the enthalpy can reach 152.2 J.g<-1>.

According to a cold / hot water supply apparatus of the present invention, when a cooling operation mode in which fluid which flows out from a first heat exchanger 22 absorbs heat in a third heat exchanger 53 is switched to a heat-accumulation operation mode in which fluid which flows out from a first heat exchanger 22 heats water in a heat accumulator tank 55, it is determined whether fluid which flows out from the first heat exchanger 22 should be made to flow to the heat accumulator tank 55 or to return to the first heat exchanger 22 without through the heat accumulator tank 55. According to this configuration, heating time of the heat accumulator tank 55 can be shortened, and energy efficiency can be enhanced.

A heat storage member housed in a canister together with an adsorbent capable of adsorbing fuel vapor has a sealed container and a phase-change material housed in the sealed container. The phase-change material becomes semisolid gel state at the melting point of the phase-change material. The phase-change material is disposed along an entire inner surface of the sealed container such that a space capable of compensating for volume alteration of the phase-change material caused by phase-change is formed at a center of an inner space of the sealed container.

The invention provides a phase change heat storage solar water heater with a self-adaption heat dissipating structure. When a phase change heat storage material is overheated, hot gas is generated in a vacuum pipe; along with increment of the temperature, the gas pressure in the vacuum pipe is increased; the longitudinal elastic deformation length of an elastic cover bowl cup structure exceeds the gap height, so that the upper surface of a top plate of a metal heat conducting block is contacted with the bottom of a blind hole of a heat conducting flat plate to form a heat transfer channel from the top plate of the metal heat conducting block to the heat conducting flat plate; the hot gas in the vacuum pipe is dispersed to the top of the vacuum pipe; a vertical cylindrical heat exchange fin of the metal heat conducting block is condensed; and heat generated by condensation is transferred to the heat conducting flat plate from the metal heat conducting block of a self-adaption heat conducting device, and is transferred from a heat dissipating plate to surrounding environments, so that the temperature of the gas in the vacuum pipe is lowered, the stable pressure in the vacuum pipe is maintained, and the overheating protection of the phase change heat storage solar water heater is achieved.