999 results about "Contact heat" patented technology

The invention relates to a preparation method and an application of multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric. The multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric is formed by successively arranging and laminating a metal foil reflection layer, a phase change temperature limitation layer, an interval composite membrane heat-insulation layer and a flame-retardant comfortable layer, wherein the metal foil reflection layer has high reflectivity and an enhanced heat-dissipation function; the phase change temperature limitation layer has functions of high energy consumption absorption and evenly-distributed heat conduction; the interval composite membrane heat-insulation layer has the functions of reflection insulation and even distribution of heat; and the flame-retardant comfortable layer has the functions of low-contact heat conduction, heat insulation and comfort. When the front side of the multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric is under the action of open fire and strong heat flow environment, the back side of the multistage-spreading heat-dissipation fire-proof heat-insulation composite fabric can be kept below 50DEG C which is near the safe temperature state of the human skin, and the integral structural form and the mechanical property are stable. The natural thickness of the composite fabric is 5-15mm, the compression thickness of the composite fabric is 3-8mm, and the square meter quality of the composite fabric is 400-1500g/m<2>. The composite fabric is fire-proof heat-insulation material which is totally sealed, stuck and sewn and can be used for individual protection and environment heat insulation in special high-temperature occasions, such as fire control, military, exploration, safe escape and industry and the like.

An efficient method of heat removal from rack mounted computer equipment, network gear and other electronic equipment, consisting of solid heat conducting components in direct contact with the heat generating sources. In particular, this invention is primarily focused on the ability to efficiently and effectively cool computer equipment in standard computer rack cabinets.

This invention utilizes a design that retains the general existing form factor of the rack mounted computer equipment, but uses direct contact heat transfer to a metal heat transfer conduit (Copper, Aluminum or other metal or efficient heat conducting material) contained within the computer equipment chassis. Furthermore, it is thermally coupled to an external rack mounted solid-to-fluid heat exchanger as an efficient method of heat transfer and removal. This is much more efficient than air as heat transfer medium which it the common method of heat removal from existing standardized rack mounted computer equipment.

This invention covers the design of the heat transfer components within the chassis of rack mounted computer server and the heat transfer system components external to the server within rack enclosure, as well as the external cooling system components necessary to connect to existing fluid based heat transfer and removal systems and processes.

A problem in the manufacture of filters using tubular membrane bundles is keeping potting material from flowing into the openings at the ends of the tubes. A preferred embodiment of a method for manufacturing a tubular membrane filter employs a non-contact heat source such as radiant heating to melt the tips of the tubular membranes. This prevents the migration of potting material into the tubes when the potting material is flowed into the ends of tube bundles during the manufacturing process for a filter.

The present invention relates to a kind of integrated heat pipe and a method of heat exchange. The heat pipe includes a tank (1-2) as a heating potion and a lot of heat carriers (1-4) as a radiating portion. The tank (1-2) and the heat carriers (1-4) have same cavity in which a coolant (1-3) is partially filled. The tank (1-2) is held in close contact with a heat source (such as electronic elements). The heat carriers (1-4) are arranged at an interval so that the radiating channels (1-4a) are formed between them. The coolant (1-3) in the tank (1-2) is heated by the heat sources, vaporized coolant moves to the heat carriers (1-4) and condenses in there. According to the invention, the heat pipe can be increased its radiating surface significantly with the varied arrangement of the heat carriers (1-4).

An elastic thermal body wrap system comprising a reusable, washable, textile holder for removably holding at least one thermal pack in close bodily contact. The thermal pack comprises one or more heat cells comprising an exothermic composition. The system comprises a fastening system to hold the holder around a user's body, for example, the back. The invention also relates to a method for holding such a thermal pack in close bodily contact by wearing the holder.

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.

An adsorber unit has an outer shell, a plurality of internal tubes extending through the shell for carrying heat transfer fluid, each tube having outwardly projecting fins along its entire length, and a solid adsorbent material in the shell surrounding the tubes such that the fins project into the adsorbent material, the fins being of a material (e.g., metal) of higher thermal conductivity than the adsorbent material. Metal wool loosely packed inside the tubes, or internal radial fins swaged into the tubes, increase internal surface area thereby enhancing convective heat transfer. Metal wool loosely packed between the external fins, or fine wire metal coils lightly squeezed between the external fins, further increase external surface area of the heat exchanger in contact with the adsorbent thereby enhancing contact heat transfer. Performance is enhanced because the external fins and wool or wire coils transport heat more efficiently to all regions of the adsorbent, and permit less non-adsorbent heat exchanger material (e.g., metal) to be used for a given amount of adsorbent. Two or more such units are used in an adsorption heat pump. This design utilizes existing components (e.g., shell-&-tube heat exchanger, internally and externally finned tubing, and metal wool or wire coils) in a novel manner heretofore untried. In one exemplary embodiment, automobile air conditioning, exhaust heat is used to power such an air conditioner. The significant additional power used by the mechanical compressor of an automobile (12%-17% during commuting for subcompact to midsize cars) can be nearly eliminated by powering the air conditioner with otherwise wasted exhaust heat. The adsorbent is heated and cooled by light oil (called Heat Transfer Fluid, HTF) which in turn is heated and cooled by exhaust and fresh air. Such indirect heating and cooling achieves the required efficiency, and allows using phase change material (e.g., wax) to store and therefore fully utilize exhaust heat. A refrigerant reservoir is included which provides immediate cooling after start-up of a cold engine, while the exhaust system and heat pump are still heating up in order to start pumping refrigerant. Eliminating the mechanical compressor increases fuel mileage by 14-18% for midsize, compact, MS and subcompact cars, or 4.6-6.0% annually, given a four-month cooling season.

A heat dissipation system apparatus and method of operation using hygroscopic working fluid for use in a wide variety of environments for absorbed water in the hygroscopic working fluid to be released to minimize water consumption in the heat dissipation system apparatus for effective cooling in environments having little available water for use in cooling systems. The system comprises a low-volatility, hygroscopic working fluid to reject thermal energy directly to ambient air. The low-volatility and hygroscopic nature of the working fluid prevents complete evaporation of the fluid and a net consumption of water for cooling, and direct-contact heat exchange allows for the creation of large interfacial surface areas for effective heat transfer. Specific methods of operation prevent the crystallization of the desiccant from the hygrosopic working fluid under various environmental conditions.

A surgical instrument suitable for endoscopic operations having a gripping handle, tubular body and an operational tip. Jetting outlets laterally disposed at the operational tip provides for jetting pressurized liquid delivered by the tubular body. The jetting outlets are configured as to emit converging jets. Two or more jets converge at a convergence point laterally displaced at a predefined distance from the surface of the operational tip. The operational tip includes a heating member having an active face for contact heating a bleeding tissue. A rotating mechanism provides for independently rotating the jetting outlets and the active surface of the heating member relative to the gripping handle. A method for regulating the operating temperature of the heating member is provided.

Provided is a water cooling type cooling jacket for an electronic device including a pouch body formed of a soft, loose elastic material that is deformable to closely contact heat-generating elements having various shapes due to a contact pressure and accommodating and a coolant, and a coolant inlet tube and a coolant outlet tube formed at one side of the pouch body to allow the coolant to circulate inside the pouch body and connected to coolant circulation lines for circulating the coolant. Therefore, the water cooling type jacket for an electronic device can be adapted to various shapes of heat-generating elements having uneven surfaces and various shapes of installation spaces beyond electrical and mechanical limitation to increase a heat transfer area and maximize a heat transfer efficiency and can be installed at various electronic devices such as hard disk drives, video cards or memory cards and a PCB without spatial limitation. Also, the water cooling type, soft cooling jacket for an electronic device can reduce a fabrication cost by simplifying the structure while maintaining close adhesion and can safely protect various elements by distributing pressure applied to the elements.

The invention refers to a manufacturing method for cadmium-less copper-indium-gallium-selenium film solar battery buffer film. The zinc film is coated on the surface of the copper-indium-gallium-selenium optical absorbing layer, then, the surface of the battery coated with metal zinc film is irradiated by light and heated, the back surface of the substrate is heated with contacting heat source or irradiation mode, the solid selenium source and/or the sulphur source are heated with contacting heat source and irradiation mode, the temperature is controlled at 160-280oC, the light irradiation is used as catalyst to the synthesis reaction between the selenium or the sulphur steam and the zinc film, the temperature in the process of the selendie or sulfide of the zinc film is controlled at 180-420 oC, the time is 2-10 minutes, the zinc film is converted into n-type ZnSe or ZnS semiconductor film material, cadmium-less copper-indium-gallium-selenium film solar battery buffer film can be produced.

The invention relates to a method and a device for measuring solid interface contacted heat transfer coefficient based on a transient method. The method comprises the following steps: a lever loading device 2 is connected with a pressure turning joint 4, a centering ball 11, a low temperature sample connecting rod 6 and a low temperature sample 14 in turn from the top to the bottom; a positioning block bears pressure in advance; and a thread transmission shaft 20 pushes a high temperature sample 15 out of a heating furnace through a high temperature sample supporting rod 17, contacts and jacks up the low temperature sample 14 to transfer the pressure to the contact surface. A temperature control thermocouple 13 of the heating furnace is connected with a program control meter, the output end of the program control meter is connected in parallel and then is connected with an industrial computer 26 through an RS232 converter, a temperature detecting thermocouple 16 is connected with a preposition multi-path gate amplifier 23 and an A/D converter plate 25 in turn to acquire and process temperature signals of measured points in real time as well as compile a FORTRAN calculation module by applying a counter heat transfer arithmetic. The method has the advantages of high measuring temperature, quick acquisition and practical measuring principle, and is suitable for the research field of solid thermal processing.

The invention belongs to the technical field of wooden furniture and relates to a shaped wooden mould pressing furniture part and a manufacturing method thereof. The part comprises the following materials in parts by weight: 100 parts of wooden material, 8-25 parts of adhesive, 1-3 parts of curing agent and a proper quantity of waterproofing agent. The manufacturing method comprises the following steps of: mixing the materials and then loading into a mould for pressing; heating by adopting a mode of combining contact type heating and high-frequency electric field heating; and shaping, wherein the mixed materials loaded into the mould are subjected to contact heat transfer by a hot press plate while mould pressing and then shaped after heating and curing. In the invention, the surface of the shaped wooden mould pressing furniture part is provided with obviously convex-concave decorative carved patterns, and the patterns have higher simulation degree and can be compared favorably with a carved and shaped furniture part.

Disclosed are a method and a device for measuring contact heat transfer coefficient on the solid interface. The method comprises connecting heating bar 12, the first sample 13, thin slice 14, the second sample 15, cold-trim bar 9, centring steel ball 16, pressure device 3 in sequence; adding corresponding thin slice 14 between the contacting surface of the two samples; increasing the number of contacting surface and enlarging temperature difference of the contacting surface; connecting the input terminals of thermal couple 4 and temperature control meter 5, and parallel the output terminal of the temperature control meter 5 with the industrial control machine 7 via the RS232 converter; heating the heating bar 12 with the heating stove 11, adding an asbestos heat insulating layer 10 around the sample to insulate heat; the industrial control machine 7 collecting temperature signal via the temperature control meter 5, displaying and analyzing.

The invention discloses ultra-low thermal-resistance heat-conducing silicon grease. The silicon grease is prepared by the following raw materials according to parts by weight: 100 parts of polydimethylsiloxane, 10-40 parts of polyphenylmethylsiloxane, 1000-2600 parts of aluminum oxide, 20-60 parts of zinc oxide and 1-10 parts of a coupling agent. Furthermore, the invention discloses a preparation method of the ultra-low thermal resistant heat-conducing silicon grease. The heat-conducting silicon grease has the following advantages that the silicon grease has a high heat-conducting coefficient and ultra-low contact thermal resistance, and the contact thermal resistance is lower than 0.06K.cm<2>/W (pressure 40psi); and the silicon grease is stable to store at room temperature, free from oil seepage, good in high-temperature resistance, free from drying after long-time use at high temperature, and excellent in both electric insulating and dielectric performances.

A system and method for transferring heat from a process source and dissipating it to the ambient atmosphere. The system uses a low-volatility, hygroscopic working fluid to reject thermal energy directly to ambient air. Direct-contact heat exchange allows for the creation of large interfacial surface areas for effective heat transfer. Heat transfer is further enhanced by water vapor pressure gradients present between the equilibrium moisture content of the working fluid and the ambient air. Cyclic absorption and evaporation of atmospheric moisture dampens variations in cooling capacity because of ambient temperature changes. The low-volatility and hygroscopic nature of the working fluid prevents complete evaporation of the fluid and a net consumption of water.

The invention relates to a flat-panel vapor chamber which belongs to a heat radiating device of a micro electronic device and is used for heat diffusion of a power module and solving the surface deformation problem of the traditional flat-panel vapor chamber and a heat source contact surface so as to further reduce the deformation with the contact surface of a heat source part. The flat-panel vapor chamber comprises heat radiating fins and a metal cavity, wherein the metal cavity consists of a box body and a cover plate; the metal cavity is internally pumped with vacuum and filled with liquid working medium; the box body and the heat radiating fins are tightly contacted or connected into a whole; the inner wall surface of the box body is provided with capillary cores, and supporting bodies are arranged between the box body and the cover plate; the central part of the inner wall surface of the cover plate is provided with a boss, and the thickness of the boss is 0.2-2.0mm; the cross section area of the boss is larger than or equal to the contact area of the heat source; and the inner wall surface of the cover plate including the boss is provided with capillary cores. The flat-panel vapor chamber has the advantages of simple structure and convenience for manufacturing and processing, can be used for effectively reducing the surface deformation and the contact heat resistance, and has high working medium refluxing efficiency and higher working efficiency.

The invention provides an integrated spray flue gas waste heat recovery and denitration device. The device comprises a spray filler and alkali storage tower (1), a flue gas conveying and oxidization loop system, a spray conveying loop system, a heat energy utilization system and an alkalifying neutralization system, wherein the spray filler and alkali storage tower (1) comprises a spray filler and alkali storage tower main body structure part (11), a spray filler and alkali storage tower connector, filler (13), a dehydrator (14) and a spray component (15). According to the device, spray water is in contact with flue gas for heat exchange through the filler with a large specific surface area, the stable contact heat exchange area of gas and liquid phases is remarkably increased, the contact time of gas and liquid phases is remarkably prolonged and the uniformity of gas and liquid phases is remarkably improved, and the performance and the stability of gas liquid heat exchange are remarkably improved, so that the flue gas waste heat recovery efficiency and the denitration/desulfurization effect are remarkably improved.