252results about How to "Increase cooling power" patented technology

A heat radiator 10 includes: a first member 12 which has a recessed portion 12c in one side thereof and which has a large number of substantially circular truncated conical protruding portions 12d formed on the bottom face of the recessed portion 12c; and a second member which is fixed to the first member 12 on the side of the recessed portion 12c for defining an internal cavity and which contacts the tip end face of each of the large number of protruding portions 12d of the first member 12, wherein the first member 12 has a pair of through holes 12e for supplying a coolant into the internal cavity and for discharging the coolant from the internal cavity.

Active cooling technologies such as thermoelectrics can be used to introduce thermal “gain” into a cooling system and, when employed in combination with forced flow liquid metal cooling loops, can provide an attractive solution for cooling high heat flux density devices and / or components. Total cooling power can be increased by employing multiple thermoelectric elements. Indeed, by employing modern semiconductor technologies, including e.g., thin-film technologies, thermoelectric elements may be cost-effectively employed and configured in large arrays.

Active cooling technologies such as thermoelectrics can be used to introduce thermal “gain” into a cooling system and, when employed in combination with forced flow liquid metal cooling loops, can provide an attractive solution for cooling high heat flux density devices and / or components. In such configurations, it can be advantageous to configure fluid flows to provide heat transfer between hot-side and cold-side flows. For example, it can be desirable to substantially equilibrate temperature of liquid metal flows entering hot-side and cold-side paths. In this way, thermal differential (ΔT) across individual thermoelectric elements can be reduced, thereby improving efficiency of the thermoelectric. Various suitable recuperator designs are described including designs that provide heat exchange with and without mixture of respective flows.

A system and method for adding or removing heat from a heat exchange fluid circulating between an external heat exchanger and an intravascular heat exchange catheter is described. The system includes a two stage cooling system providing for a high rate of cooling in one stage and a lower rate of cooling in a second stage. Both stages may be used to provide maximal cooling while the second stage is used to provide improved control of the cooling rate as a target temperature is approached. The second stage may also be used to provide heat to the heat exchange fluid.

A solid-state heat transporting device including a heat transporting element whose uniformity of contact with one or multiple surfaces is controllable so that various amounts of heat may be transported to and from the one or multiple surfaces. The heat transporting element uses the electrocaloric effect to absorb and release the heat and the uniformity of contact is controlled using an electrostatic effect which may change the shape of the heat transporting element. In one embodiment, the heat transporting element is an electrostatically actuated P(VDF-TrFE-CFE) polymer stack achieving a high specific cooling power of 2.8 W / g and a COP of 13 (the highest reported coefficient of performance to date) when used as a cooling device.

In a centrifugal fan the diameter of the impeller is rendered less than 20 mm, yet by rotating it under rotational conditions in which the centrifugal force along the impeller periphery is 10,000 m / s2 or more, the static pressure that the fan generates is heightened. At the same time, rendering the vane spacing a predetermined width or less reduces noise. Configuring in this way produces a small-scale, high-static-pressure, low-noise fan for cooling electronic devices. Furthermore, by mounting the centrifugal fan on a heatsink having densely arranged heat-dissipating projections a small-scale, high-cooling-capacity, quiet cooling device is realized.

An apparatus and method for automatic operation of a refrigeration system to provide refrigeration power to a catheter for tissue ablation or mapping. The primary refrigeration system can be open loop or closed loop, and a precool loop will typically be closed loop. Equipment and procedures are disclosed for bringing the system to the desired operational state, for controlling the operation by controlling refrigerant flow rate, for performing safety checks, and for achieving safe shutdown. The catheter-based system for performing a cryoablation procedure uses a precooler to lower the temperature of a fluid refrigerant to a sub-cool temperature (−40° C.) at a working pressure (400 psi). The sub-cooled fluid is then introduced into a supply line of the catheter. Upon outflow of the primary fluid from the supply line, and into a tip section of the catheter, the fluid refrigerant boils at an outflow pressure of approximately one atmosphere, at a temperature of about −88° C. In operation, the working pressure is computer controlled to obtain an appropriate outflow pressure for the coldest possible temperature in the tip section.

A liquefier includes a Dewar having a storage portion and a neck portion extending therefrom. A hermetically isolated liquefaction chamber is disposed within the neck of the Dewar. One or more control components including a temperature and pressure sensor are coupled to a CPU and disposed within the liquefaction chamber for dynamic control of liquefaction conditions. A gas flow control is coupled to the CPU for regulating an input gas flow into the liquefaction chamber. A volume surrounding the liquefaction chamber may be adapted to provide a counter-flow heat exchange. These and other features provide improved liquefaction efficiency among other benefits.

There is provided an aluminum bonding member capable of being simply and inexpensively produced and capable of being used as a cooling member having a high cooling power. The aluminum bonding member 10 has an aluminum member 12 of aluminum or an aluminum alloy exposed to the outside, and a tubular member 14 of a material which does not melt at a temperature close to the melting point of aluminum or the aluminum alloy. Both of the opening end portions of the tubular member 14 are open to the outside of the aluminum member 12. A portion of the tubular member 14 between the opening end portions extends in the aluminum member 12, and the outer peripheral surface of the portion of the tubular member 14 extending in the aluminum member 12 is bonded directly to the aluminum member 12.

The invention relates to a chip cooling system, which comprises a chip heat conduction plate used for primary heat exchange, and an annular heat pipe used for secondary heat exchange, wherein a plurality of micro-channels are arranged on the chip heat conduction plate side by side, the micro-channels are connected with a circulating pipeline provided with a pump simultaneously to form a circulating loop, and the circulating loop is filled with liquid I; and the annular heat pipe is sleeved in the circulating loop to form a sleeving structure, the annular heat pipe is filled with liquid II and gas, and the pressure intensity of the gas is always less than the atmospheric pressure intensity. The chip cooling system combines the micro-channels with the annular heat pipe to form a two-stage heat exchange system, the micro-channels can provide large radiating heat flux and can absorb heat on the chip timely, the annular heat pipe fully utilizes effects such as phase change and gravity as a driving force, the radiating efficiency is high, and the cost is low; and the heat passes through the circulating loop and the annular heat pipe from the chip and is radiated to the environment, the radiating power is high, and the effect is good.

The performance of a multi-stage inertance pulse tube cryocooler in accordance with an embodiment of the present invention may be enhanced by cooling the inertance tube of one stage placing it in thermal communication with the cool heat exchanger of a preceding stage. Cooling at least one inertance tube of a multi-stage cooler in this invention lowers the viscosity and sound speed of the gas in the inertance tube, thereby improving the cooling power for that subsequent cooling stage, and for the entire device.

The invention provides a regenerative electrocaloric device, comprising an upper electrocaloric ring supported by a center shaft and a lower electrocaloric ring supported by a support shaft. The upper and lower electrocaloric rings are arranged in a stacked manner. The upper and lower electrocaloric rings are in opposite rotary contact with each other and comprise a high electric field region and a low electric field region which are spaced apart by a spacer. The high electric field region and the low electric field region in the upper and lower electrocaloric rings are arranged oppositely and supplied with power to form a hot end and cold end. Each of the hot end and the cold end is connected with a thermal load, and a low thermal-conductivity layer for preventing dissipation of heat is arranged between the two thermal loads. Thanks to the combination of the structure and configuration, the regenerative energy saving and environment benefiting problems are solved; and the good effects of simple technology, cooling power and efficiency improvement, and energy saving and environment protection are achieved.

A condensation dryer having a temperature sensor to measure a temperature of a coolant; a first comparator to determine a temperature difference between a first temperature of the coolant and a second temperature of the coolant that is measured after a period of time and to compare the temperature difference with a limiting temperature difference stored in a controller; a counter to ascertain a number of occurrences in which the temperature difference is greater than or equal to the limiting temperature difference; and a second comparator to compare the number of occurrences with a limiting number stored in the controller and to evaluate a number difference between the number of occurrences and the limiting number with respect to the presence of an impermissible operating state. A first impermissible operating state is indicated if the number difference is greater than or equal to a value stored in the controller.

A product-lubricated multiphase pump for pumping a multiphase mixture containing hydrocarbon includes a separation system and a supply system. To achieve a good cooling and lubrication of pump elements without a lot of operating media and operating medium circuits, the separation system has a first separation stage for at least partly separating at least a portion of the multiphase mixture into a plurality of phase-enriched components and the supply system supplies a liquid-enriched liquid component as lubricant to a pump element to be lubricated.

The invention relates to a columnar radiator design with radiating fins and comprises a base and a plurality of radiating fins; in particular the head face of the base is provided with a plurality of radiating columns with integrated and vertical extension shapes; each radiating fin is provided with a plurality of openings which are closely matched with and corresponds to the radiating columns in order that the radiating fins in sequence and match are sleeved on the radiating columns of the base to form an alternate, adjacent and matched combination; the radiating columns of the base and the openings of the radiating fins can implement various corresponding shapes; the root part or the top part of the radiating column can be of chamfer shape; the base and a radiating fin system can be configured with a set of fans or can be combined with thermotubes to strength the rapid radiating function of the radiator.

The invention discloses a magnetic refrigerating device based on a pulsed magnetic field. The device comprises a repetitive pulsed power supply without a continuous loop, a pulsed magnet, a magnetic refrigeration working medium, a hot end heat exchange unit and a cold end heat exchange unit, wherein the repetitive pulsed power supply discharges to the pulsed magnet, and part of electric energy flows back to the repetitive pulsed power supply to achieve energy recovery; during the discharge process, the pulsed magnet generates the pulsed magnetic field and causes the refrigeration working medium to magnetize and release heat, and the heat generated by the magnetic working medium is transferred to a high-temperature heat source through the hot end heat exchange unit; after the discharge is finished, the repetitive pulsed power supply is shut off, and the pulsed magnet stops generating the pulsed magnetic field, and the magnetic refrigeration working medium demagnetizes and absorbs the heat, and through heat absorption of a low-temperature heat source by the cold end heat exchange unit, the temperature of the low-temperature heat source is lowered, thus completing a discharge refrigeration cycle; and the discharge refrigeration cycle is circulated in a manner above to realize continuous refrigeration. According to the scheme disclosed by the invention, the controllable pulsed magnet generates the intermittent repetitive pulsed magnetic field to achieve the magnetic refrigeration, and the magnetic refrigerating device has the characteristics of high magnetic field intensity, no moving part, convenience and fastness of control, high efficiency and high refrigeration power.

The invention relates to a drive system for motor vehicles comprising a waste heat-producing internal combustion engine and a circuit for draining off at least partially said waste heat with a working fluid which is relievable in an expansion machine, wherein said working fluid comprises several components, wherein at least one component is transferable into a gas phase by absorbing heat of the internal combustion engine and / or another source inside the drive system which also comprises means for separating the liquid fraction from the working fluid prior to the expansion machine pressure removal. The internal combustion engine can be cooled by a first cooling circuit. A second cooling circuit can be used in such a way that the first cooling circuit is cooled thereby.

A novel heat exchanger (FIG. 1) designed and fabricated based on dry ice-ethylene glycol (DIEG) bath 1 as the coolant mixture for the emergency core cooling system (ECCS) of the nuclear power systems to avoid core meltdown during the normal reactor shutdown or reactor scram in the emergency conditions.This method is proposed to upgrade the safety systems including modified ECCS which utilizes fast non-water coolant emergency system by fast cooling of reactor pressure vessel (RPV) 31 based on dry ice+ethylene glycol slurry 1.

The invention relates to a combustion chamber of a gas turbine, inside of which a supplied fuel is reacted with supplied combustion air in order to produce a working medium. The inside of the combustion chamber wall is provided with a lining formed from a number of heat shield elements. The or each heat shield element, together with the combustion chamber wall, forms an interior space that can be subjected to the action of a coolant. The aim of the invention is to provide a combustion chamber with a comparatively simple design that has a high system efficiency. To this end, the invention provides that a flow element is placed in the respective interior space while serving to effect a locally specific control of the flow of coolant.

The present invention relates to pulse tube refrigerators for recondensing cryogenic liquids. In particular, the present invention relates to the same for magnetic resonance imaging systems. In many cryogenic applications components, e.g. superconducting coils for magnetic resonance imaging (mri), superconducting transformers, generators, electronics, are cooled by keeping them in contact with a volume of liquified gases (e.g. helium, neon, nitrogen, argon, methane). In a first aspect, the present invention provides a pulse tube refrigerator PTR pulse tube refrigerator (PTR) arrangement within a cryogenic apparatus, wherein a regenerator tube of the PTR is finned. In this configuration the fins or baffles, are believed to increase the surface area available for distributed heat transfer from the helium atmosphere to the regenerator.

A shutter device can switch between a state where illuminating light from a lamp of an illuminating device is blocked (referred to as a closing state of the shutter device) and a state where illuminating light passes through (referred to as an opening state of the shutter device). A system control circuit instructs a panel cooling fan-use power source to decrease a fan rotation speed, when receiving information indicating that the shutter device is in the closing state from the detecting portion. After receiving this instruction, the panel fan power source decreases power supplied to the panel cooling fan (fan motor).

A control method of a fuel cell vehicle comprises estimating a load applied to an own vehicle that is the fuel cell vehicle and that runs on an estimated route by using current traffic flow information or the like in addition to the estimated route; determining whether an overload area is present on the estimated route by using the estimated load; and when it is determined that the overload area is present on the estimated route, performing an increasing process of increasing a cooling power of a cooling system to be greater than a cooling power set in an ordinary control mode before the own vehicle reaches the overload area.

The invention discloses an IGBT module liquid cooling plate based on parallel liquid flow grooves and a manufacturing method thereof. The IGBT module liquid cooling plate comprises a substrate, wherein a plurality of liquid flow grooves, for a cooling liquid to pass through, for cooling IGBT modules are formed in the upper end of the substrate in parallel; a plurality of flow deflectors for controlling the cooling liquid to be concentrated in a multi-channel region under a heating chip so as to improve the heat exchange efficiency are arranged at the positions of cooling liquid inlets of the liquid flow grooves; a liquid inlet flow passage and a liquid outlet flow passage are formed in two ends of each of the liquid flow grooves in a communicating manner respectively; a seal ring for sealing the IGBT modules is arranged above the substrate; and a cover plate for covering the substrate and the seal ring is arranged above the substrate. Through the IGBT module liquid cooling plate, the distribution of passage flow under each IGBT module is uniform, the surface of the liquid cooling plate is of good temperature uniformity, the pressure drop of inlets and outlets is controlled in a reasonable range, the heat dissipation power is high, and the overall leakproofness is good.

The invention discloses a switchgear cabinet with an arrangement for cooling off the heat from components installed in the interior of the switchgear cabinet. The arrangement comprises an air inlet which is used to introduce the air around the cabinet into the cabinet; an air outlet which is used to discharge the air in the interior of the carbinet from the vertical side surface of the interior of the cabinet, wherein the air outlet has a vertical size which is at least part of the height of the interior of the carbinet; and an air-fluid-heat exchanger, which is used to discharge hot air in the interior of the carbinet from the air outlet, wherein the air-fluid-heat exchanger at least partially extends in the vertical direction of the air outlet. The air-fluid-heat exchanger is characterized in that: at least one thermotube device of a thermotube that extends on one part of the vertical size of the air outlet is arranged between the air outlet and the air-fluid-heat exchanger in the air flow direction.

Extinguishing medium in pasty to solid form for quenching electric arcs, consisting of a silicone polymer or a mixture of such silicone polymers, with the silicone polymer or the mixture of silicone polymers containing a mineral compound or a mixture of such compounds in powder form as a filler; use of the extinguishing medium to quench electric arcs in overcurrent-protection elements, in electronics and microelectronics; in high-voltage engineering; or in repeating fuses, and electrical devices, machines and systems which contain an extinguishing medium according to the invention.