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155results about How to "Good thermal conductivity" patented technology

Foam metal composite phase change material heat storage temperature-difference power generation device

InactiveCN104135191AGood thermal conductivityFast heat storage and heat release
The invention relates to a foam metal composite phase change material heat storage temperature-difference power generation device. The device comprises a plurality of small separated sealed containers arranged on the outer wall of a high-temperature flue gas pipeline in a sleeved mode. The small separated sealed containers are filled with foam metal composite phase change materials. The outer sides of the small separated sealed containers are closely connected with the hot end of a temperature-difference thermoelectric power generation module through a thermally-conductive adhesive. The shape of the inner sides of the small separated sealed containers is the same as the shape of the outer wall of the high-temperature flue gas pipeline, and the inner sides of the small separated sealed containers make close contact with the outer wall of the high-temperature flue gas pipeline; the outer sides of the small separated sealed containers are planes connected with the hot end of the temperature-difference thermoelectric power generation module, and the cold end of the temperature-difference thermoelectric power generation module is connected with a radiating block. The radiating block is filled with circulating cooling water, and the outer side of the radiating block is connected with radiating fins. According to the device, the foam metal composite phase change heat storage materials are combined with temperature-difference thermoelectric power generation devices to generate power, and therefore the efficiency of temperature-difference thermoelectric power generation can be effectively improved. The device can be conveniently installed on a boiler pipeline or an automobile exhaust pipeline and is reliable in power generation performance.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Electric-insulating heat-conducting polyphenyl thioether composite material and preparation method thereof

The invention belongs to the technical field of high molecular materials, and discloses an electric-insulating heat-conducting polyphenyl thioether composite material and a preparation method thereof. The composite material disclosed by the invention comprises the following components in parts by weight: 20-40 parts of polyphenyl thioether, 40-60 parts of heat-conducting filler, 5-10 parts of toughener, 5-10 parts of glass fiber, 0.5-4 parts of coupling agent, 0.3-1 part of antioxidant and 0.5-2 parts of processing assistant. The preparation method of the composite material comprises the following steps: adding 40-60 parts of heat-conducting filler and 0.5-4 parts of coupling agent into a high-speed mixer, and mixing at 80-120 DEG C for 10-45 minutes; adding the mixture and 20-40 parts of polyphenyl thioether into the high-speed mixer, adding 5-15 parts of toughener, 0.3-1 part of antioxidant and 0.5-2 parts of processing assistant, and evenly mixing; adding the mixture into an extruding machine through a feed hopper, and adding 5-15 parts of glass fiber through a glass fiber port; and carrying out melt extrusion and granulating. The polyphenyl thioether composite material disclosed by the invention has excellent heat-conducting property, and remains favorable mechanical properties and processability.
Owner:HEFEI GENIUS NEW MATERIALS

Composite phase change material with high thermal conductivity and preparation method thereof

The invention belongs to the technical field of composite materials and discloses a composite phase change material with high thermal conductivity and a preparation method thereof. The composite phase change material comprises a surface modified carbon-based nanometer thermal conductive filler and aliphatic acid. The surface modified carbon-based nanometer thermal conductive filler is one of surface modified nano-graphite flake, graphene or carbon nanotube. The aliphatic acid is one component selected from decylic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid or a mixture of two components selected from decylic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid. The preparation method comprises the following steps: carrying out surface modification on a carbon-based nanometer thermal conductive filler by the use of melamine, sodium humate or dopamine and adding the surface modified carbon-based nanometer thermal conductive filler into a aliphatic acid melt; and uniformly mixing for melt blending and introducing the melt blending product into a mold, and carrying out curing molding so as to obtain the composite phase change material with high thermal conductivity. The composite phase change material with high thermal conductivity has excellent thermal conductivity and stable performance, and has a good application prospect.
Owner:SOUTH CHINA UNIV OF TECH

Phase change heat storage device

The invention discloses a phase change heat storage device. The phase change heat storage device comprises a heat accumulator shell, heat exchange pipelines and phase change materials, wherein the heat exchange pipelines and the phase change materials are arranged in the heat accumulator shell. The phase change heat storage device is characterized in that a porous metal framework is arranged in the heat accumulator shell, porous channel arrays are arranged on the porous metal framework in parallel in the axial direction, and the phase change materials are located in all porous channels of the porous channel arrays; the heat exchange pipelines are arranged in the porous channel arrays in the axial direction of the porous metal framework at intervals; each heat exchange pipeline is surrounded by at least one circle of pore channels; a flow dividing device is arranged at inlets of the heat exchange pipelines, and a flow collecting device is arranged at outlets of the heat exchange pipelines; three-dimensional crossed flow guide type chaos turbulators are further arranged in the heat exchange pipelines. According to the phase change heat storage device, due to the fact that the three-dimensional crossed flow guide type chaos turbulators are arranged in the heat exchange pipelines, flow guide blocks which are arrayed periodically and alternately can induce fluid to generate chaos convection, heat exchange between the fluid and pipe walls can be enhanced obviously, and the heat storage device can achieve excellent heat storage and heat exchange capability.
Owner:SOUTHEAST UNIV

High-dispersion graphene heat conduction plastic production method, product thereof, and application of product

The invention discloses a high-dispersion graphene heat conduction plastic production method, a product thereof, and an application of the product. The production method comprises the following steps: impregnating graphene in a water and ethanol mixed solution containing a surfactant, carrying out ultrasonic and stirring treatment for 1-5 h, and drying the obtained solution in a 100 DEG C oven for 4-10 h; respectively weighing and mixing an antioxidant and a heat conduction powder assistant according to a certain mass ratio to form uniform powder; uniformly mixing the uniform powder, a graphene slurry, a coupling agent and matrix resin; and adding the above obtained raw materials into a double screw extruder from a main feeding opening, carrying out blending extrusion processing, pelletizing the processed raw materials, and carrying out low temperature drying to obtain the final product high-dispersion graphene heat conduction plastic. The dispersion state of the graphene in the plastic is improved, so the plastic has a high mechanical strength and a good heat conduction performance. The graphene heat conduction plastic disclosed in the invention has the advantages of strong versatility, good processability and realization of continuous large-scale production.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
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