45results about How to "Improve effective thermal conductivity" patented technology

The subject invention pertains to a method and apparatus for storing thermal energy. The subject thermal energy storage apparatus can function as a heat absorber in a cooling system. A cooling system can incorporate a cooling cycle that utilizes thermal energy storage and has two coolant loops. The primary cooling loop acquires the waste heat from a heat source, such as an electronic device, by heat transfer to the primary coolant via, for example, a sensible heat process (where sensible heat is heat absorbed or transmitted by a substance during a change in temperature which is not accompanied by a change of state) or by evaporating the primary coolant through a latent heat phase change process. The waste heat absorbed by the primary coolant is transferred to the host material of the heat absorber. The subject invention uses a high thermal conductivity host material to house a lower thermal conductivity phase change material, in order to achieve a thermal energy absorber that has a high effective thermal conductivity. In a specific embodiment, the high thermal conductivity host material has have voids within the structure that can be filled by the phase change material. The increased surface area of phase change material in thermal contact with the host material per volume of phase change material allows the thermal energy to be stored or released quickly, because of the enhanced effective thermal conductivity.

The vapor chamber is used in an electronic device. The electronic device includes a metal casing. The vapor chamber includes an upper cover, a working fluid, a waterproof layer, and a wick structure layer. The upper cover is disposed on inner walls of the metal casing to define a containing space. The working fluid is filled into the containing space. The waterproof layer is formed on inner walls of the containing space. The wick structure layer is formed on the waterproof layer.

A refrigerant dryer, in particular a compressed air refrigerant dryer, is provided for drying a gaseous fluid while cooling the gaseous fluid using a refrigerant. The dryer includes a pressure fluid-refrigerant agent-heat exchanger (30) in which a cooling of the gaseous fluid takes place directly or indirectly by a refrigerant conveyed in a primary loop (16), one or more refrigerant compressor / compressors (24) for operating the primary loop, and a cold accumulator (13) with an accumulator-side heat exchanger (20) which couples an accumulator discharge fluid to a cold accumulator medium (14). The pressure fluid-refrigerant agent-heat exchanger (30) and the cold accumulator (13) are fluidically connected or can be brought into fluidic connection via a discharge loop (15) for an accumulator discharge fluid. The cold accumulator (13) is arranged, relative to gravity, above the pressure fluid-refrigerant agent-heat exchanger (30), in such a manner that the heated accumulator discharge fluid is conveyed through the discharge loop (15) for cooling in the cold accumulator (13), is cooled there, and subsequently re-conveyed to the pressure fluid-refrigerant agent-heat exchanger (30).

The invention provides a heat conductor device (10) for removing heat from an electrical component (12) operating in a frequency range, the device comprising a body (13) having a first thermal conductivity, characterized in that the body (13) is provided with a heat spreader (14) comprising a pattern of thermally conducting tiles (20, 50, 51, 52, 61) separated by gaps (21), the tiles having a second thermal conductivity higher than the first thermal conductivity, wherein each tile has at most a maximum area value and the gaps have at least a minimum gap width, and the maximum area and the minimum width are dimensioned for conforming to a predetermined electromagnetic interference characteristic of the heat conductor device when combined with the electrical component operating in the frequency range. The invention also provides a method for forming a heat conductor device.

The invention relates to a heat exchange technology with a cold accumulation function and discloses an efficient three-medium phase change coupled cold-accumulating and heat-exchanging device which comprises an inner tube of a bidirectional fin, a housing tube with an outer straight rib, an upper end plate and a lower end plate. The efficient three-medium phase change coupled cold-accumulating and heat-exchanging device is characterized in that the inner side of the inner tube of the bidirectional fin is provided with an inner ripple fin, the outer side of the inner tube is provided with a plurality of axial straight fins; the outer side of the housing tube is provided with a plurality of axial straight fins used for exchanging heat with a cold carrying fluid of a cold utilizing system; the axial straight fins at the outer side of the inner tube are in soldering connection with the inner wall of the housing tube; and a low-temperature solid-liquid phase change material is filled in a multi-channel interlayer cavity formed between the inner tube and the housing tube. The invention provides a cold-accumulating and heat-exchanging device which stores and regulates low-temperature cold released by low-temperature liquefied liquid in a gas liquefying rewarming process by adopting the phase change latent heat of the low-temperature solid-liquid phase change material, and the cold-accumulating and heat-exchanging device has a function of storing and regulating low-temperature cold, can ensure the continuity and the stability of supplying the cold by using a cold utilizing system, and is a key device of the low-temperature liquefied gas cold recycling technology.

The invention discloses a porous copper-wood fiber / polystyrene double-layer composite capillary core for a loop heat pipe and a preparation method thereof. NaCl or anhydrous sodium carbonate is ground and sieved to obtain a particle size of 50-75 μm. The pore-forming agent is dry and ready for use; polystyrene, wood fiber and pore-forming agent are mixed and pressed, and the porous wood fiber / polystyrene composite capillary core is obtained by sintering and washing; the electrolytic copper powder and the pore-forming agent are mixed and pressed The porous copper-wood fiber / polystyrene double-layer composite capillary core is obtained by sintering and washing; then the two are superimposed and compounded, wherein the porous copper core is close to the evaporation end of the loop heat pipe, and the porous composite material capillary core is close to the loop heat pipe compensation room. The invention applies the double-layer composite capillary core to the loop heat pipe, which can not only strengthen the internal heat and mass transfer, but also form a gradient thermal resistance in the radial direction, thereby reducing back-to-back heat leakage and effectively reducing the operation of the loop heat pipe. temperature, stabilizing the phase change interface, thereby improving the operating performance of the loop heat pipe.

Disclosed is a metal hydride plate-fin heat exchanger, which belongs to the industrial heat exchange and energy saving technique field. The invention comprises: an upper cover plate, a fluid path flattine fin, a spacer plate, reaction bed units, a fluid path tail sealing tape, a lower cover plate, a bolt component, a through hole flanged disc, a blind plate flanged disc, a fluid path head sealingtape, a hydrogen pipe, a fluorine rubber flange gasket, a rear enclosing cover, a front enclosing cover, a liquid inlet, a liquid outlet, a filter sheet gasket and a millipore filter sheet. Each reaction bed unit includes an upper cover plate, a unit tail sealing tape, a unit lateral sealing tape, a lower cover plate and a unit serrate fin. Each reaction bed unit has an open end and is welded with a serrate fin in the inside, thereby the heat exchange area and the effective thermal conductivity are greatly increased, and the intensity of a heat exchange unit can also be ensured under the condition of increasing the heat capacity of the heat exchange unit indistinctively. In addition, filtration and sealing difficulties of metal hydrides are greatly reduced by adopting the structure that all the reaction bed units are connected and fixed on the through hole flanged disc in parallel, meanwhile, the mass transfer capability of hydrogen will not be reduced.

The invention provides a forced convection micro-channel heat dissipation structure. The forced convection micro-channel heat dissipation structure comprises: at least two heat dissipation units whichare sequentially stacked; a plurality of heat dissipation channels, wherein the heat dissipation channels are arranged on each heat dissipation unit; at least one inlet and at least one outlet, wherein the at least one inlet and the at least one outlet are opened on the heat dissipation units being in contact with a chip; at least two circulation channels which are arranged on other heat dissipation units not in direct contact with the chip so as to communicate the heat dissipation channels on the adjacent heat dissipation units; at least two negative thermal expansion bodies, wherein one negative thermal expansion body is correspondingly filled in one circulation channel and is used for conducting or not conducting the heat dissipation channels of the adjacent heat dissipation units; anda cover plate covering the heat dissipation unit on the top layer, wherein at least one air inlet and at least one air outlet are formed in the cover plate, and the at least one air inlet and the atleast one air outlet communicate with the heat dissipation channel on the heat dissipation unit on the top layer. The invention also provides a manufacturing method of the heat dissipation structure and an electronic device applying the heat dissipation structure.