Abstract: A heat exchanger adopts a four-pass structure, including two rows of tubes, a first upper tank portion communicating with the upper end of one of the tube rows, a second upper tank portion communicating with the upper end of the other tube row, a first lower tank portion communicating with the lower end of the one tube row, a second lower tank portion communicating with the lower end of the other tube row, a communicating passage that communicates between first ends of the first and second upper tank portions a partition partitioning each of the first and second upper tank portions, inflow and outflow ports communicating with the other ends of the first and second upper tank portions. The inflow port opening is smaller and has a higher center than the outflow port opening.

Abstract: A curved scraper blade for a scraped-surface heat exchanger pivots about an axis off the centerline of the blade. The profile of the blade is chosen to provide a low initial scrape angle and to change gradually if at all as the blade wears away in service. The off-center pivot placement allows scraped material to flow between the blade and the drive shaft. Several materials are suitable for the blade, including PEEK thermoplastic.

Abstract: A low power or passive optical apparatus provides temperature control of dynamic thermooptic devices and temperature-sensitive optical devices formed on the same substrate. The optical apparatus includes a variable heat transfer device with a conductive heat transfer component (e.g., heat pipe) and a heat-conductive interface component (e.g., heat sink) to exchange thermal energy with an external environment. In one embodiment, the heat pipe has a variable resistance and the heat sink has a fixed thermal resistance. In a second embodiment, the heat pipe has a fixed resistance and the heat sink has a variable thermal resistance. In another embodiment both the heat pipe and heat sink have variable thermal resistance. In another embodiment, the optical apparatus further includes a thermoelectric cooler and the variable heat transfer device (e.g.

Abstract: A liquid cooling system is disclosed for use in an electronic apparatus. The system is constructed to be of a reduced size and thickness, thus allowing it to be used for cooling heat-generating devices such as semiconductor elements, while maintaining corrosion resistance. The system includes a pump, a heat-receiving jacket, and flow passages through which the cooling liquid is circulated. An ion exchange bag having a water-permeable bag is disposed within the liquid cooling system. The water-permeable bag further contains an ion exchange resin therein.

Abstract: An object of the present invention is to provide a specific relationship to be achieved by numerical values selected to sustain a desired level of coolant distributability as well as miniaturization and weight reduction for tanks in a heat exchanger adopting a structure in which the width of tubes therein is set smaller relative to the inner diameter of the tanks. In the heat exchanger according to the present invention, the inner diameter of the tanks is set small relative to the tube width, and with Dt representing an equivalent diameter at the passage section of the tanks and L representing the length of the longest path extending from an entrance to an open end of a tube, 15?L/Dt?42 is true.

Abstract: A lightweight thermal heat transfer apparatus, including a core section and a laminate composite section. The core section is substantially similar to a diamond shape. The laminate composite section has a plurality of thermally conductive fibers, which are disposed around the core section and oriented at a configuration similar to the core section.

Abstract: According to one embodiment of the invention, an electronic apparatus comprises a main unit, a display unit and a support unit. The main unit contains a heat-generating component and a heat-receiving portion. The heat-receiving portion is thermally connected to the heat-generating component. The support unit supports the display unit on the main unit and contains a heat-radiating portion that radiates the heat of the heat-generating component. The heat of the heat-generating component is transmitted to a heat-transferring medium and transferred to the heat-radiating portion through the heat-transferring medium.

Abstract: A countercurrent heat exchanger includes a pair of heat exchanger cores (1, 2) with multiple tubes (11, 21) and fins (12, 22) which are arranged alternatively and next to each other in its depth direction. One end sides of the tubes (11, 21) of the inflow-side heat exchanger core (1) and the outflow-side heat exchanger core (2) is connected with a U-turn intermediate tank (3), and the other end sides are connected with the inflow-side tank (4) and the outflow-side tank (5) which are separated from each other. The inflow-side tank (4), outflow-side tank (5) and intermediate tank (3) are attached to a vehicle body side so that the heat exchanger cores (1) and (2) can expand and contract with respect to the intermediate tank (3).

Abstract: An apparatus removing material accumulated on the exterior surfaces of adjacent heat exchanger plates arranged side-by-side in a spaced relationship in a bulk material heat exchanger and a bulk material heat exchanger incorporating the apparatus is provided. In one aspect, the apparatus develops vibratory shock waves through each coil to dislodge material that has accumulated on the surfaces of the heat exchanger plates. In another aspect, the apparatus translates each heat exchanger plate in a sequential back-and-forth motion to create a shearing effect in material that has accumulated between the adjacent surfaces of heat exchanger plates. In one aspect, the apparatus includes a driven cam and a cam follower, where the cam or cam follower includes a profile to achieve the desired motion of each heat exchanger plate.

Abstract: An exhaust gas heat exchanger and bypass has an intake manifold, an outlet manifold, a duct for a heat exchanger, and a bypass duct. The heat exchanger duct and the bypass duct run in parallel between the intake manifold and the outlet manifold and are sealingly connected to the outlet manifold. The heat exchanger is arranged in the interior of the heat exchange duct such that the intake side of the heat exchanger is sealingly connected to the heat exchanger duct and the outlet side of the heat exchanger is slideably received in the heat exchanger duct to allow thermal expansion of the heat exchanger relative to the heat exchanger duct.

Abstract: A heat pipe includes a metal tube and an amount of fluid sealed in the copper tube. The metal tube may include an inner surface. The inner surface is patterned to define at least one pitch and at least two grooves. A given pitch separates adjacent grooves. The amount of fluid may include a liquid and carbon nanotubes, carbon nanocapsules and/or metal nanoparticles suspended therein.

Abstract: A heat transfer assembly for transferring heat from a heat generating device to a circulating fluid, said heat transfer assembly comprising an evaporator device having at least one microchannel formed therein, in thermally conductive contact with said heat generating device, a condenser device, actuating means and manifold means for circulating said fluid between said evaporator device and said condenser device, wherein said heat transfer assembly further comprises a bubble generator capable to create bubbles in said at least one microchannel at a controlled frequency.

Abstract: A heat pipe wherein a condensable liquid phase working fluid is encapsulated in a container sealed in air-tight condition; wherein the wick composed of the porous body for refluxing the liquid phase working fluid by a capillary pressure is provided in the container; wherein a part of the container functions as an evaporating part for evaporating the working fluid by means of inputting the heat from outside; and wherein another part of the container functions as a condensing part for condensing a vapor of the working fluid by means of radiating the heat to the outside; comprises a direct reflux flow passage for flowing the liquid phase working fluid to the evaporating part, which has a flow cross-sectional area greater than that of a cavity formed in the porous body.

Abstract: A more efficient cooling system for densely packed electronic components for use in an out-of-doors equipment enclosure. An array of cooling assemblies are placed on heat generating components mounted to printed circuit boards mounted in enclosure racks. Each board has a manifold for intake and exhaust of refrigerant, and larger rack manifolds are substituted for rails and are attached to a backplane. A hybrid package including a ceramic hybrid power module and an attached array of cooling assemblies provide even more density of components and improved cooling.

Abstract: A heat exchanger includes a heat exchange core, an introduction tank for introducing a heat transfer medium into the heat exchange core, and a discharge tank for receiving the heat transfer medium discharged from the heat exchange core. Materials used to form the introduction tank and the discharge tank are different from each other. The properties desired for the respective tanks may be attained, and while unnecessary increases in the costs for manufacturing the heat exchanger is may be reduced or avoided, the performance of the heat exchanger may be improved.

Abstract: A heat exchanger tube having an integral restricting and turbulating structure consisting of dimples formed by confronting indentations pressed into the sides of the heat exchanger tube. The dimples are comprised of indentations disposed in pairs which extend into the tube to such a depth as is necessary to significantly reduce the cross sectional area of the heat exchanger tube and provide a pair of converging, diverging flow nozzles to promote turbulence of the flue gases. The turbulence characteristics of the tube can be controlled by varying the size of the aperture of the nozzles. In certain applications, the dimples are located along the sides of the heat exchanger tube, thereby providing unobstructed drainage for liquids even when the tube is bent into a serpentine shape.

Abstract: A cooling device includes a heat-radiating device and a centrifugal pump provided in a closed circulation passage for circulating refrigerant. The centrifugal pump contacts and absorbs heat from heat-generating electronic parts by heat exchange of the refrigerant therein to radiate the heat via the heat-radiating device. The centrifugal pump includes a lower casing that comes into contact with the heatgenerating electronic parts, an upper casing disposed to face the lower casing to form a pump chamber, and an impeller sandwiched between the upper casing and the lower casing. The lower casing includes a recessed conical surface facing the impeller, at least one protrusion provided in a center portion of the recessed conical surface and a contact face with which the heat-generating electronic parts come into contact formed directly below the protrusion on an opposite side of the recessed conical surface.

Abstract: A heat transfer device including a sealed container, a base layer, formed on the bottom face of the container, and a wick is provided. The wick has a plurality of projections protruding upward from the base layer. A fluid is encapsulated in the container. The heat transfer device further includes a guide unit arranged on an inner face of the container, which guides the liquid to the wick.

Abstract: A heat dissipating assembly. The heat dissipating assembly comprises a frame, a clamping member, and a rotatable handle. The frame comprises a locking member. The clamping member is disposed crossing the frame. The rotatable handle is rotatably connected to the frame and abuts the clamping member. The rotatable handle exerts pressure on the clamping member, and the locking member locks the rotatable handle.

Abstract: A vehicle heat exchanger includes heat exchangers overlapped with each other in an airflow direction. The heat exchangers include heat exchanger tubes arranged side by side with each other. The heat exchangers include outer fins interposed between neighboring heat exchanger tubes. The heat exchangers includes header pipes connecting and communicating with both ends of the heat exchanger tubes for heat-conducting media to circulate through the heat exchanger tubes and header pipes. The vehicle heat exchanger includes a reservoir in communication with one of the header pipes for reserving a heat-conducting medium. The reservoir is fixed to a header pipe of the largest one of the heat exchangers.