389 results about "Passive cooling" patented technology

Solar panels and assembled arrays thereof include a collection of relatively compact, high-capacity power units. Optical components of each power unit include a front window or surface glazing, a primary mirror, secondary mirror and receiver assembly. Primary and secondary mirrors are defined by respective perimeters, at least a portion of which may be substantially coplanar and in contact with the front window. Some primary mirrors are configured with a perimeter of alternating full and truncated sections, and are curved to a base portion forming a pilot hole therein. Receiver assembly mechanical components include an alignment tube for mating with the primary mirror's pilot hole and for housing a photovoltaic solar cell. A base plate provided adjacent to the alignment tube serves to radiate heat emitted by the solar cell, and in some embodiments an additional heat sink provides further passive cooling. A tapered optical rod also provided within the receiver assembly directs received sunlight to the solar cell where electrical current is generated.

Solar panels and assembled arrays thereof include a collection of relatively compact, high-capacity power units. Optical components of each power unit include a front window or surface glazing, a primary mirror, secondary mirror and receiver assembly. Primary and secondary mirrors are defined by respective perimeters, at least a portion of which may be substantially coplanar and in contact with the front window. Some primary mirrors are configured with a perimeter of alternating full and truncated sections, and are curved to a base portion forming a pilot hole therein. Receiver assembly mechanical components include an alignment tube for mating with the primary mirror's pilot hole and for housing a photovoltaic solar cell. A base plate provided adjacent to the alignment tube serves to radiate heat emitted by the solar cell, and in some embodiments an additional heat sink provides further passive cooling. A tapered optical rod also provided within the receiver assembly directs received sunlight to the solar cell where electrical current is generated.

A phase change material, including multiple phase change materials of different formulations, is placed in heat transfer association with an electronics enclosure (e.g., a sealed enclosure) deployed in an environment that causes the electronics and the phase change material to experience periods of heating and periods of cooling. During the periods of heating, the phase change material absorbs heat and changes at least partially from a first state to a second state to maintain the temperature of the electronics at a desirable level. During the periods of cooling, the phase change material reverts at least partially back to the first state for future heat absorption. The phase change material is cooled by a thermally cooler body such as the night sky. The electronics enclosure and phase change material may be placed in a second enclosure covered with a paint having a paint additive that reflects solar radiation.

An illumination device comprises a solid-state lighting device and a heat sink. The heat sink is configured to be attachable to a fixture for a gas-discharge lamp to retrofit existing gas-discharge fixtures. The heat sink is conductively thermally coupled to the solid-state lighting device to dissipate heat generated by the solid-state lighting device.

Certain embodiments of the present invention provide a cooling duct assembly for electronic equipment installed in a cabinet. The cooling duct assembly comprises at least one main duct in fluid communication with a front portion of the cabinet. The at least one main duct receives cold air from the front portion of the cabinet and routes the cold air toward a back portion of the cabinet. Additionally, the cooling duct assembly comprises at least one side duct in fluid communication with the at least one main duct. The at least one side duct receives the cold air from the at least one main duct and routes the cold air to at least one side air intake opening on the electronic equipment.

A passive cooling system for an auxiliary power unit (APU) installation on an aircraft is provided. The system is for an auxiliary power unit having at least a compressor portion of a gas turbine engine and an oil cooler contained separately within a nacelle. The system includes the auxiliary power unit housed within the nacelle of the aircraft, an engine exhaust opening defined in the aft portion of the nacelle and communicating with the gas turbine engine, at least a first air inlet duct communicating with a second opening defined in said nacelle and with said compressor portion and the oil cooler is located within a second duct communicating with an opening other than the engine exhaust opening of said nacelle and with the engine exhaust opening. Exterior cooling air and engine exhaust ejected through said engine exhaust opening entrain cooling air through said second duct to said oil cooler, and thus provide engine oil cooling. An exhaust eductor is also provided.

A secondary fuel delivery system for delivering a secondary stream of fuel and / or diluent to a secondary combustion zone located in the transition piece of a combustion engine, downstream of the engine primary combustion region is disclosed. The system includes a manifold formed integral to, and surrounding a portion of, the transition piece, a manifold inlet port, and a collection of injection nozzles. A flowsleeve augments fuel / diluent flow velocity and improves the system cooling effectiveness. Passive cooling elements, including effusion cooling holes located within the transition boundary and thermal-stress-dissipating gaps that resist thermal stress accumulation, provide supplemental heat dissipation in key areas. The system delivers a secondary fuel / diluent mixture to a secondary combustion zone located along the length of the transition piece, while reducing the impact of elevated vibration levels found within the transition piece and avoiding the heat dissipation difficulties often associated with traditional vibration reduction methods.

The present disclosure relates to cooling an energy storage module using passive and active cooling techniques. Passive cooling is provided by storing heat in a phase change material that is contact with the energy storage cells of the energy storage module. Active cooling is provided by circulating coolant through coolant passages that are in thermal contact with the energy storage cells. A control system for determining the temperature of the energy storage module and controlling coolant flow when the temperature reaches a predetermined threshold is disclosed.

The invention relates to a heatsink. More particularly, the invention relates to a heatsink having tapered geometry that improves passive cooling efficiency. A tapered geometry between heatsink heat dissipation elements, as a function of distance along a z-axis opposing gravity, decreases resistance to rarification of passively flowing cooling gas upon heating. Thus, the tapered heatsink elements result in higher velocity of gas flow and increased cooling efficiency of the heatsink. Optionally, the heatsink is made from a thermally conductive polymer allowing the heatsink to be created in complex shapes using injection molding.

The invention discloses a method which utilizes natural gas pressure energy; namely, the pressure and the temperature of the natural gas in a high pressure pipeline are reduced by a no-power refrigerator so as to gain low temperature natural gas which then exchanges the heat with a normal-temperature refrigerant which is sent by a normal-temperature tank; the low temperature refrigerant with temperature reduced enters a refrigerant storage tank for standby and is finally delivered to a cold energy user; the normal-temperature natural gas with temperature increased enters the pipeline. The method which utilizes natural gas pressure energy has convenient and practical whole process technique and high efficiency, spends little investment on the self-pressure energy in the pressure reduction process of the high pressure natural gas which is recovered by a pressure modulating station, converts the pressure energy into the cold energy with low operation cost, leads the cold energy to be used by cold quantity users of cold storages, cold water air conditioners, wasted rubber deep-cold crushing round the pressure modulating station by means of the refrigerant, etc., or to be made into ice blocks and dry ice products for abroad sale, etc., thus gaining huge economic benefits, improving the utilization ratio of the energy resource and eliminating the safe hidden trouble which is generated by sudden coolness of the equipment in the normal pressure modulating process.

A system and method for power management of a computer with a vapor-cooled processor is disclosed. A dual mode cooling system for an information handling system includes a heat exchanger for receiving heat generated by the information handling system. The system further includes a condenser in communication with the heat exchanger such that the heat received at the heat exchanger is transferred to the condenser. The heat exchanger and the condenser are able to selectively operate in an active cooling mode and a passive cooling mode.

A solid-state lamp comprises a body having a first chamber with inlet apertures and a second chamber with outlet apertures. The chambers are interconnected in fluid communication by one or more passages. The lamp further comprises a thermally conductive substrate having a heat radiating surface located within at least one chamber and one or more solid-state light emitters, typically LEDs, mounted in thermal communication with the thermally conductive substrate. The lamp is configured such that in operation heat generated by the LEDs is radiated by the substrate into one or both chambers causing a difference in air pressure between the chambers that results in surrounding air being drawn into the inlet apertures, flowing through the chambers via the interconnecting passages in the substrate and exiting through the outlet apertures thereby cooling the substrate and LEDs.

An embodiment of the present invention provides a method and system of operating a combustion system that has Lean direct injection (LDI) functionality. The method and system provides a passive cooling system for an injector of the LDI system. The method and system may also provide a means to direct the flow of the fluid exiting the injector of the LDI system.

A system for cooling a gas turbine engine control component comprises a control component, at least one duct in fluid communication with the component and the atmosphere, and a valve assembly located with the duct for modulating airflow to the component. A method for cooling a gas turbine engine control component comprises the steps of: a) providing a system for cooling the component, the system comprising at least one duct in fluid communication with the component and the atmosphere and a valve assembly located with the duct for modulating airflow to the component; b) exposing the system to a first condition where cooling of the component is required; c) opening the valve assembly in response to the first condition; d) exposing the system to a second condition where cooling of the component is not required; and e) closing the valve assembly in response to the second condition.

A passive cooling system for an auxiliary power unit (APU) installation on an aircraft is provided. The system is for an auxiliary power unit having at least a compressor portion of a gas turbine engine and an oil cooler contained separately within a nacelle. The system includes the auxiliary power unit housed within the nacelle of the aircraft, an engine exhaust opening defined in the aft portion of the nacelle and communicating with the gas turbine engine, at least a first air inlet duct communicating with a second opening defined in said nacelle and with said compressor portion and the oil cooler is located within a second duct communicating with an opening other than the engine exhaust opening of said nacelle and with the engine exhaust opening. Exterior cooling air and engine exhaust ejected through said engine exhaust opening entrain cooling air through said second duct to said oil cooler, and thus provide engine oil cooling. An exhaust eductor is also provided.

A system includes a power source and a heat-shield mechanism which encloses the power source. This heat-shield mechanism includes a 3-dimensional housing that defines a cavity in which the power source resides, and a plate that is positioned to cover an opening to the cavity that is defined by an edge of the housing. Note that the housing contains three layers in which a second layer is sandwiched between a first layer and a third layer. This second layer has a first anisotropic thermal conductivity. Furthermore, the plate includes a material having a second anisotropic thermal conductivity.

The invention provides a device combining in-core and out-of-core dwelling of a molten material of a large-scale passive nuclear power plant. The device comprises a concrete sacrificial layer (4), a core catcher chamber (7), a core catcher refractory layer (8), a cooling channel inlet (9), a cooling channel outlet (10) and a core catcher bottom cooling channel (11). The invention provides a set of device organically combining molten material out-of-core cooling with an IVR (interactive voice response) system, when IVR succeeds, in-core dwelling of the molten material can be realized; and after the IVR fails, out-of-core dwelling of the molten material is realized by passive cooling of the core catcher bottom cooling channel, and the capability of mitigating severe accidents of the large-scale passive pressurized water reactor nuclear power plant is further enhanced.

A secondary fuel delivery system for delivering a secondary stream of fuel and / or diluent to a secondary combustion zone located in the transition piece of a combustion engine, downstream of the engine primary combustion region is disclosed. The system includes a manifold formed integral to, and surrounding a portion of, the transition piece, a manifold inlet port, and a collection of injection nozzles. A flowsleeve augments fuel / diluent flow velocity and improves the system cooling effectiveness. Passive cooling elements, including effusion cooling holes located within the transition boundary and thermal-stress-dissipating gaps that resist thermal stress accumulation, provide supplemental heat dissipation in key areas. The system delivers a secondary fuel / diluent mixture to a secondary combustion zone located along the length of the transition piece, while reducing the impact of elevated vibration levels found within the transition piece and avoiding the heat dissipation difficulties often associated with traditional vibration reduction methods.

A method for cooling a semiconductor including passive cooling including transferring heat via passive cooling components; active cooling including transferring heat via active cooling components; and controlling the active cooling based on temperature of the semiconductor. A cooling system for a semiconductor including: a passive component in thermal contact with the semiconductor; an active cooling component in thermal contact with the semiconductor; and a controller controlling the active cooling component.

A medical system, including a catheter having a fluid flow path and a distal portion separated from the fluid flow path; a plurality of electrodes coupled to the distal portion; at least one temperature sensor coupled to the distal portion; a heat sink in thermal communication with each electrode and in fluid communication with the fluid flow path; a radiofrequency signal generator in communication with the plurality of electrodes; and a fluid source in fluid communication with the fluid flow path.

An endoscope comprises an elongated shaft, a headpiece at a proximal end of the shaft, the headpiece having a housing, at least one light source which is arranged in the shaft in a distal area thereof, and produces lost heat, and a passive cooling which has at least one heat pipe which is arranged in the shaft and is thermally coupled to the at least one light source in order to lead away the lost heat in the proximal direction. The at least one heat pipe extends into the headpiece, and a heat sink body is arranged in the headpiece, to which heat sink body the at least one heat pipe is thermally coupled, and which absorbs the lost heat from the at least one heat pipe and emits the lost heat to the environment directly or via the housing of the headpiece.

An illumination device comprises a solid-state lighting device and a heat sink. The heat sink is configured to be attachable to a fixture for a gas-discharge lamp to retrofit existing gas-discharge fixtures. The heat sink is conductively thermally coupled to the solid-state lighting device to dissipate heat generated by the solid-state lighting device.

Apparatus for cooling a person in extreme environments. The apparatus includes a garment having a vest with attached tubing. The vest includes an evaporative cooling device and the tubing is configured to circulate chilled water. The vest includes a material that is able to receive and absorb an amount of liquid water with a mass greater than the material. When liquid water is applied to the vest, the vest absorbs the water for later evaporation. The tubing enables the garment to have a lower differential temperature between the inside surface and the outside surface, thereby reducing the rate of evaporation, which enables the passive cooling to be operable for an extended period of time. When the heat load does not permit the differential temperature to be reduced, the tubing removes additional heat, thereby providing additional heat removing capacity beyond the passive cooling.

A method, system, and apparatus for controlling the temperature within a remotely located enclosure that contains temperature sensitive equipment is provided. For some embodiments, the system includes an array of thermoelectric cooling (TEC) devices that act as an active cooling device and an active heating device. The system may also include a temperature controller that receives signals from a temperature sensor located at or near the temperature sensitive equipment. The controller may be configured to supply DC power to the thermoelectric coupling devices based on the output signal of the temperature sensor. The polarity of the DC power can be reversed by the controller in order to cause the thermoelectric device to heat or to cool the enclosure. The system also contains a passive cooling device. The system includes an independent electrical power source with a battery and solar cell to supply power to the temperature control devices and the equipment contained in the enclosure.

A rechargeable battery pack having a housing, a plurality of cells located within the housing, a heat sink for dissipating heat from the plurality of cells, wherein the plurality of cells are encapsulated by the heat sink, and at least one elongated cooling channel to provide for active cooling, wherein the elongated cooling channel is within the housing and at least partially defined by the heat sink. A rechargeable battery pack having a housing, a plurality of cells located within the housing, wherein no single cell is completely surrounded by adjacent cells, a heat sink for dissipating heat from the plurality of cells, wherein the plurality of cells are encapsulated by the heat sink, and at least one elongated cooling channel to provide for active cooling, wherein the elongated cooling channel is located within the housing and is at least partially defined by the heat sink.

The invention relates to a reactor safety system, which comprises a safety shell, a steam generator arranged in the safety shell, a reactor core, a reactor cavity and a cooling pipeline; the safety shell comprises an inner safety shell wall and an outer safety shell wall arranged at the periphery of the inner safety shell wall; an accommodating space is formed between the inner safety shell wall and the outer safety shell; and the accommodating space is filled with cooling liquid to form a passive cooling water tank; and the cooling pipeline is communicated with the accommodating space and injects the cooling liquid into the safety shell. The system can be used as a containment spraying system, and is used for injecting into the steam generator and the reactor core to carry away heat fromthe reactor core, and injecting into the reactor cavity to carry way heat outside a pressure vessel so as to prevent the pressure of the safety shell from rising, the reactor core from damage and thepressure vessel from out of work. Moreover, the system has the functions of preventing radioactive release and cooling the safety shell, so that the reliability and the safety of a nuclear power station are greatly improved.