283results about How to "Effective heat transfer" patented technology

The invention discloses a special compound heat conducting powder for a heat conducting and insulating power cable protective casing, and a production process thereof. The power comprises the following components in percentage by weight according to the formula: 40-60 percent of alumina of different particle sizes, 5-25 percent of nano silicon carbide, 3-15 percent of nano aluminum nitride, 2-12 percent of nano zinc oxide, 1-10 percent of nano nano magnesia, 4-10 percent of nano silicon nitride, and 1-8 percent of nano boron nitride. The production process is that the components are subjected to surface actification processing and then to compounding. The formula has the main characteristics that the raw materials are easy to obtain, the produced compound heat conducting powder is high in thermal conduction, and the additional amount is small. The formula adopted by the invention can be applied to heat dissipation protective casings for various buried construction cables.

Nowadays in aircraft so-called on-board inert gas generation systems (OBIGGS) are used to generate inert gases, to which OBIGGS cooled bleed air of engines or auxiliary power units is fed. According to an embodiment of the present invention, an air-cooling device for an OBIGGS system in an aircraft is proposed that comprise a bleed position (1). By way of the bleed position (1), cooling air from an air conditioning unit (4) on board the aircraft can be bled, which cooling air can subsequently be used for cooling supply air (18) for the OBIGGS system. Thus, there is no need for an additionalram-air inlet channel for cooling the supply air. Air resistance and weight are thus reduced, and the stability of the primary structure is enhanced.

A buffered optical fibre includes an optical waveguide, at least one exterior coating surrounding the optical waveguide and a buffer coating surrounding the at least one exterior coating, wherein the buffer coating is a tight buffer coating made of a material having a density of at least about 1.2 Kg/dm³, a thermal conductivity of at least about 0.4 W/m·K and includes a polymeric matrix and an inorganic filler.

The invention discloses a heat-shrinkable heat-conducting cable accessory, comprising the following components in parts by weight: 100 parts of ethylene and copolymer thereof, 0-25 parts of fire retardant, 0-80 parts of packing, 0.5-2.5 parts of light stabilizer, 0-6 parts of antioxidant, 1.5-6 parts of lubricating agent, 0-10 parts of coloring agent, 1-8 parts of coupling agent, 0-10 parts of modifier, 0-5 parts of crosslinking agent and 1-30 parts of heat-conducting material. The heat-shrinkable heat-conducting cable accessory disclosed by the invention has good thermal conductivity and insulativity, especially the campsite heat-conducting material and other components such as ethylene and the copolymer thereof and the like are stacked to form a cross network, so that effective heat conduction can be carried out, the heat-conducting coefficient can be up to 3.305-4.867w/m.k, the volume resistivity can be ensured at 10<15>ohm*cm, the insulating effect of the cable accessory is ensured, and the heat-conducting effect of the cable accessory can also be ensured, so as to ensure normal operation of the cable.

A resin board is fixed to a plate member made of metal by a fixing member. A semi-conductor module and a capacitor are mounted on a first surface of the resin board. A first ground pattern is formed on the fist surface and electrically connected to the plate member by means of the fixing member. A connector is also provided on the first surface such that the first ground pattern is interposed between the semi-conductor module and the connector. The heat from the semi-conductor module and the capacitor is transmitted to the plate member via the first ground pattern and the fixing member.

The invention discloses chemical industry waste gas treatment equipment, which comprises a box body, wherein the lower end of the left side of the box body is provided with a gas inlet pipe; a filtering cavity is arranged at the right side of the gas inlet pipe; a first connecting pipe is arranged at the upper side of the filtering cavity; a burning cavity is arranged at the upper side of the first connecting pipe; a second connecting pipe is arranged at the right side of the burning cavity; a condensation cavity is arranged at the left side of the upper end of the second connecting pipe; the left end and the right end of the upper side of the condensation cavity are provided with circulation pipes; a water storage cavity is arranged at the upper side of each circulation pipe; an acid alkaline detector is arranged at the right side of the condensation cavity; each of the left side and the right side of the lower end of the second connecting pipe is provided with a third connecting pipe; the lower sides of the third connecting pipes are respectively provided with an acid solution storage cavity and an alkaline solution storage cavity; the upper side of each of the acid solution storage cavity and the alkaline solution storage cavity is provided with a gas outlet pipe; the upper sides of the gas outlet pipes are connected with a fourth connecting pipe; the right side of the fourth connecting pipe is provided with a purification cavity; the upper side of the purification cavity is provided with an exhaust pipe. The chemical industry waste gas treatment equipment has the advantages that various kinds of harmful gases and suspended particles in waste gas can be effectively removed, so that the cleanness of exhausted gas is ensured.

The invention relates to a supported iron-based Fischer-Tropsch catalyst. The supported iron-based Fischer-Tropsch catalyst contains a spherical mesoporous carbon support, an active component iron located on the support and an optional catalyst promoter, wherein the specific surface area of the spherical mesoporous carbon support is 500-1000 m<2>/g, pore volume is 1.5-3.5 cm<3>/g, and average porediameter is 9-30 nm. According to the catalyst, spherical mesoporous carbon with high pore volume and large pore diameter is taken as the support, not only can high loading capacity of iron be realized, but also when the prepared catalyst is applied to the Fischer-Tropsch reaction, high Fischer-Tropsch reactivity and high productivity can be obtained, and particularly, CO conversion rate is remarkably increased and hydrocarbon productivity is improved. The invention further relates to preparation of the catalyst and an application of the catalyst to the Fischer-Tropsch reaction.

An apparatus for enhancing heat transfer efficiency of an endothermic/exothermic article includes a heat sink disposed on the endothermic/exothermic article to enhance heat transmission, a plurality of fins formed on the heat sink to enhance heat exchange, and a porous medium disposed on the fins to increase cooling efficiency of the endothermic/exothermic article by air flowing between gaps between the fins and the porous medium.

The invention discloses an air cooling structure of an outer rotor electric roller. The air cooling structure comprises a fixed seat (27), an end cover assembly and a stator assembly, the stator assembly comprises a stator sleeve (1), an axial rib plate (4), an air deflector structure, a bearing pedestal (3), a main shaft (9) and a stator coil iron core assembly (12). The air deflector structure is connected with the axial rib plate (4) and the main shaft (9); the axial rib plate (4) is connected with the bearing seat (3), the stator sleeve (1) and the main shaft (9); air inlet and outlet ducts are distributed on the fixed seat (27); air inlets and outlets are distributed in the end cover assembly; a ventilating duct is formed outside a shaft among the stator sleeve (1), the air deflectorstructure and the axial rib plate (4); the fan at one end of the main shaft (9) sends cooling air flow into the ventilating duct through a fixing base (27) and the end cover assembly to cool a statoriron core, and then through the ventilating duct outside the shaft, the flow of the cooling air entering the stator is increased, the heat dissipation effect is enhanced, and therefore the service life of the electric roller is effectively prolonged.