776 results about "Forced convection" patented technology

This invention describes a non-imaging, non-tracking, integrally-formed solar radiation concentrator that passively concentrates both diffuse and direct solar radiation onto photovoltaic cells to produce electricity, incorporating its features into a shingle-like element useful as a roofing material and in other structural applications. The substantially transparent, solar concentrating elements of the invention may also incorporate a system to remove waste energy in the form of heat that is not utilized in the generation of electricity. The invention further provides a thermal energy recovery system including a forced convection air system for removing waste heat from the concentrating shingle assembly and using it, if desired, for building space heat or domestic water heating.

If a forced convection is generated by a cooling fan, there is generated a problem that a natural convection is prevented and a cooling effect in a region of the natural convection is lowered. The invention provides a structure in which an air flow generated by a forced convection does not come into contact with an air flow generated by a natural convection, by setting a partition all between a forced convection path in which the air flows on the basis of a forced convection generated by a cooling fan, and a natural convection path in which the air flows on the basis of a natural convection. Further, the partition wall is not provided near an upper end so as to draw in the air flowing through the natural convection path to a side of the forced convection path, thereby promoting the natural convection of the natural convection path.

A lamp having a lighting source, integral electronics, and a thermal distribution mechanism disposed in a housing. The thermal distribution mechanism may include a For example, the lamp may include a thermal shield between the lighting source and the integral electronics. The lamp also may have a forced convection mechanism, such as an air-moving device, disposed adjacent the integral electronics. A heat pipe, a heat sink, or another conductive heat transfer member also may be disposed in thermal communication with one or more of the integral electronics. For example, the integral electronics may be mounted to a thermally conductive board. The housing itself also may be thermally conductive to conductively spread the heat and convect/radiate the heat away from the lamp.

A heat-transfer device has a sealed vapor chamber with a phase-change fluid therein, and a thermoelectric cooling (TEC) element with a cooled side in thermal contact with the vapor chamber and a heated side in contact with heat-dissipation fins. The TEC element decreases the temperature of the vapor chamber and increases the temperature of the fins for improved efficiency. The vapor chamber is defined between concentrically positioned tubes, and a tunnel region is located within the inner tube. Additional TEC elements within the tunnel region further dissipate heat. In two-phase natural convection embodiments, TEC elements may further cool liquid returning to the heat source. Parallel heat dissipation paths may also be provided. In a two-phase forced convection embodiment, a TEC element may further cool liquid returning to the heat source, and additional TEC elements may be provided on the condenser. In some embodiments, active feedback controls the amount of energy transferred by a TEC element.

An integrated liquid cooling device for electronic components addresses the need for efficient cooling created by ever increasing power densities of electronic components. The integrated liquid cooling device has a housing enclosing the electronic component, cooling liquid contained in the housing, a motor immersed in the cooling liquid and mounted to the housing, an impeller driven by the motor, and cooling surfaces on the exterior of the housing. The motor driven impeller creates a turbulent flow in the cooling liquid and a high velocity liquid flow over the electronic component, which rapidly transfers heat from the electronic component and distributes it throughout the interior of the housing. The cooling surfaces on the exterior of the housing dissipate this heat, either by free or forced convection, into the surrounding environment. Alternately, the integrated liquid cooling device may distribute this heat energy over an equipment case by circulating cooling liquid through a baffled enclosure that provides high velocity cooling liquid flow near the heat generating electronic component. Additional cooling capacity can be gained with the described integrated liquid cooling device by selecting a cooling liquid whose boiling point is near the operating temperature of the electronic component.

An electronic candle includes a source of light which provides a spatially and temporally varying pattern of illumination which simulates a candle flame, a volatile release station which operates to release a volatile material such as an aromatic material from a cartridge, and a forced convection system which disperses the volatile material. The candle further includes a controller which coordinates the operation of the release of the volatile material and the light source so that the pattern of light produced by the source is coordinated with an attribute of the volatile material being released.

The present invention provides a method and device for production, extraction and delivery of an aerosol mist with ultrafine droplets. A high frequency wave generating device or other process generates very small particles or droplets from a reservoir of liquid or material to be atomized. A helical flow of a carrier gas medium such as air is directed into a container and creates a high throughput aerosol of air and fine droplets. The aerosol is delivered through a suitable outlet such as by deflecting the aerosol upwards and providing a tube centrally situated with respect to the helical flow such that the aerosol will discharge through the tube in high quantity of throughput and high quality of stable aerosol of very fine mist droplets. The methods described utilize in-situ extraction of fine mist droplets using helical flow behavior as opposed to forced convection ejection of mist or inertial separation of droplets by separators.

A hermetic Rankine cycle in a sealed casing powers an internal centrifugal condensate pump with an internal vapor turbine during forced convective heat transfer between a heat source and a heat sink. No work is imported into the cycle during operation. A centrifugal pumping disk shears the working fluid against a heating surface, sweeping evolving vapor into radial vortices which provide sink flow conduits to a vapor space at the center of the cylindrical turbine. Convective mass flow through the vapor space to the condensing end of the casing spins the turbine and the centrifugal pumping disk which is connected to it. Vapor is continuously swept from the heating surface, so bubbles do not form and superheat while blocking heat flux into liquid working fluid. Vapor is sucked through the radial vortices into the central vapor space and into the condensing end of the casing along the low pressure gradients in vortex cores established by cooling power. A high heat flux surface is thereby thermally connected to a conventional heat sink having high cooling power, for maximal heat extraction at data centers or other heat sources. Vapor vortices organize counterflow of vapor and condensate in a continuous mass flow cycle, and extract work from heat. Organic working fluids can be used in the casing to make even low temperature waste heat a power source.

Modular heat sinks utilizing heat pipes to provide a more uniform temperature distribution over a packaged integrated circuit and efficient heat sinking in either free or forced convection environments. The heat sinks utilize both horizontal and vertical heat pipes to transfer heat both horizontally and vertically in the heat sinks. Selection of the number of heat pipes used allows tailoring of the heat sink capabilities for different applications using the same fundamental assemblage of parts. Various embodiments are disclosed.

The present invention relates to a semiconductor chip cooling module with fin-fan-fin configuration employing a heat pipe provided with air ventilating means having a forced convection cooling type radiating method of forcedly cooling heat radiating fins by ventilating a wind to rapidly discharge and cool heat generated from a central processing unit (hereinafter referred to as “CPU”) mounted on a main board of a computer; the present invention comprises a heat radiating plate having a plurality of slots, a pair of heat pipes installed in the slots in a symmetrical relationship, and air ventilating means having a ventilating fan installed between heat radiating pins of the pair of heat pipes, wherein an air is ventilated to the heat radiating pins to forcedly radiate the heat radiating pins. The present invention is capable of embodying a rapid radiation on an overheat of the CPU by employing a forced direct cooling method that air ventilating means is installed at a center of plural rows of heat pipes to ventilate an air to thereby forcedly and directly cool the heat radiating fins mounted on the plural rows of heat pipes.

The invention discloses an electromagnetic semicontinuous casting device and a casting method thereof. The electromagnetic semicontinuous casting device comprises a crucible smelting furnace, a crucible standing furnace, a flow control mechanism, a split-flow device, an electromagnetic crystallizer system and a vertical semicontinuous casting machine, wherein the electromagnetic crystallizer system is a metal inner sleeve crystallizer system in which a group of build-in excitation coil is fixed, and comprises a metal inner sleeve, a cooling water cavity, the excitation coil, an oil supply system, an oil distribution system and a protective gas ring. According to the electromagnetic semicontinuous casting device disclosed by the invention, through a method of adjusting the frequency of electrical current, duty ratio and average current strength, the electrical current in a unique wave shape is formed in the single excitation coil placed in the cooling cavity of a crystallizer, so that desired forced convection or shaking effect is formed in the crystallizer with low current intensity; the grain of ingot blank is significantly refined; and columnar crystals are significantly reduced or eliminated to lower macroscopic segregation and realize the technical effect of low-stress casting. Under the condition of similar functional effects, the size of the electromagnetic crystallizer system is one third to one half of that of an original electromagnetic crystallizer system.

A system for removing waste energy in the form of sensible heat and fluorescent energy from a solid state laser medium having a broad surface. The system includes a manifold disposed about the laser medium having a plurality of inlet jets interspersed with a plurality of exhaust orifices. Coolant fluid is circulated through the manifold. The fluid is forced through the plurality of inlet jets to impinge the broad face of the laser medium, thereby transferring waste energy by convection from the laser medium to the coolant fluid. The coolant fluid is further circulated to exhaust the pumphead manifold through the plurality of exhaust orifices. The fluorescent energy, which is radiated from the laser medium, is converted to sensible heat by an absorber disposed within the coolant adjacent to the laser medium. The coolant then removes the converted heat by forced convection. The absorber can be suspended particles in the coolant fluid or a porous material supported in the manifold at some distance from the laser medium.

Methods and devices for cell or tissue culture are provided. One aspect provides a bioreactor having a gas permeable, closed-loop chamber for cell or tissue culture, and an oscillating means for moving the gas permeable, closed-loop chamber bidirectionally along an axis horizontal to an axis normal to the closed-loop chamber to force convection of cells and fluid in the gas permeable, closed-loop chamber. The bioreactor optionally includes a tissue engineering scaffold, an inlet means, an outlet means, and integrated sensors. Another aspect provides a bioreactor having a plurality of gas permeable, closed-loop chambers for cell or tissue culture. Methods of culturing cells and producing tissue constructs are also provided.

A system and apparatus for enhancing convection in electrolytes for improved electrodeposition of copper and other non ferrous metals in industrial electrolytic cells at given a current density providing exact geometric locations of the electrolyte jet infeed supply system used to impart forced convection in the electrolyte, the gas bubbling system for low pressure/low volume convection enhancement, and the electrode bottom and lateral distancing system, and range of operational parameters, for correct electrolyte flow and air bubbling flow improving cell productivity, quality of metal plates with increased electrical efficiency for its industrial application. The system and apparatus can also be used in industrial cells with same optimal results but at increased current densities, provided sufficient suitable electrolyte and additional electric power is available.

A blackbody furnace, mainly comprising a radiation cavity, a thermally insulating layer, a heater, a housing, a temperature controller, an airflow controller and a high-pressure air source. Besides, a gas channel is provided at the bottom of the radiation cavity to conduct the interior of the furnace chamber with the exterior. In the process of lowering the temperature of the blackbody furnace, the airflow controller could be actuated by the temperature controller or by an operator. Therefore, the room-temperature high-pressure air will enter the radiation cavity through the gas channel to fast cool down the radiation cavity. Finally, heat air will be vented from an opening at the front end of the radiation cavity. The present invention utilizes forced convection to enhance the efficiency of heat dissipation to fast lower the temperature of the blackbody furnace.

The invention relates to a multi-layer sealed case having a plurality of hollow tapered cooling channels. An antenna cover, a rear cover plate, a left cover plate and a right cover plate, and an upper cover plate and a lower cover plate are sealed at an outermost layer of a transmitting-receiving case; an outer layer cavity structure reserved by the transmitting-receiving case structure forms a third-layer sealing cavity; a left inner air-duct sealing plate and a right inner air-duct sealing plate are installed at left and right inner air-duct cavity mounting end surfaces reserved at the transmitting-receiving case structure to form first layer sealing cavities; and the transmitting-receiving case structure is sealed by the rear cover plate to form a second layer cavity for installing all sub systems. The first layer sealed cavities are hollow cooling channels are distributed in a left-right symmetric mode by inner air-duct tapered left fins and inner air-duct tapered right fins; and unique hollow tapered air ducts are formed at the height and length directions of the cooling fins. All sub systems inside the transmitting-receiving case are attached to external surfaces of a left inner air duct and a right inner air duct by heat-conduction pads; heat of all sub systems is transmitted to inner surface cooling fins of the left inner air duct and the right inner air duct with low thermal resistance; and then the heat is taken away by forced convection of a motor.

A fuel reformer includes a reforming portion having a tubular catalytic converter that is composed of a substrate supporting the catalytic component, and is arranged to have a center axis extending along the supply direction of the fuel and oxidizer derived from a supply portion, and a communication passage arranged along an inner wall of the catalytic converter and communicating with the supply portion. The fuel and oxidizer supplied from the supply portion to the communication passage pass from the inner wall of the catalytic converter to an outer wall thereof by forced convection, thereby reforming the fuel.

The invention discloses a growth device and a growth method for preparing high-purity semi-insulating carbonized silicon single crystals efficiently. The growth method is implemented by the carbonizedsilicon single crystal growth device with a structure of an inert gas graphite flow guide tube and a graphite current-limiting cover. Inertia gases generate forced convection under the action of thestructure, and a forced convection layer is formed on the outer wall of a graphite crucible. When speed and flow of the gas convection are high, influences of diffusion on concentration distribution can be inhibited. In the method, directional movement of the forced convection layer can prevent nitrogen molecules outside the graphite crucible from dispersing into the graphite crucible, so that theproblem that adsorption nitrogen serves as a pollution source in a heat insulating system is solved. According to the method, an inertia-gas atmosphere isolation room system is not needed, and a long-term nitrogen removal process based on furnace vacuumizing is also not needed. The growth device and the growth method have the advantages of high efficiency and equipment simplicity, and can be widely applied to multiple carbonized silicon single crystal furnace systems in the field.