Abstract: A multiple circuit plate heat exchanger exchanges heat between a heat transfer fluid and refrigerant. The first portion of the heat transfer fluid flow enters a first refrigerant circuit and exchanges heat with refrigerant in the first circuit. The second portion of the heat transfer fluid flow then enters a second refrigerant circuit and exchanges heat with refrigerant in the second circuit. By employing a single heat transfer fluid pass, the average leaving temperature difference from each circuit can be reduced, reducing entropy generation and making the system more thermodynamically efficient.

Abstract: A multipass heat exchanger with return bends between passes has its first return bend which varies in cross sectional area in the direction of the of the gas flow. The cross sectional area first increases so as to thereby reduce the velocity of the flue gas, decrease the flue side heat transfer coefficient and decrease the resulting hotspots. The cross sectional area is then increased in a more downstream portion of the return bend so as to not increase the overall height of the heat exchanger. The variation preferably occurs throughout the entire span of the return bend, with the increase in cross sectional area beginning at the start of the return bend.

Abstract: The piece made of composite material comprises a plate and a plurality of stiffeners integrally formed with the plate. A metal wall is fixed to the edges of the stiffeners and is provided with passages for circulating the fluid. The plate exposed to the heat flux radiates towards the metal wall through the gaps between the stiffeners, and it also performs the structural function. The invention can be used with structures that are exposed to very high heat flux: the walls of jet combustion chambers, the walls of space plane vehicles, the walls of nuclear fusion reactors.

Abstract: A furnace heat exchanger with multiple parallel flow passages with at least two of the passages being partially formed of a pair of opposed sidewalls having wavy cross-sectional shapes wherein the downstream passage has at least as many and preferably more waves than the upstream pass. The wavy shapes are preferably generally sinusoidal in form with the waves of the two sides being substantially in phase.

Abstract: The present invention is a cooling plate including a groove, which becomes a passage of a coolant, inside a body, wherein one or more fins are provided inside the groove, wherein the groove is covered with a lid having width larger than the groove, wherein the lid is joined to the body by friction stir welding, and wherein a weld bead formed by the joining is outside the passage, and the weld bead formed by the joining is formed within the body and further, is characterized by a manufacturing method of a cooling plate that has a first groove, which becomes a passage of a coolant, and a second groove, which has width larger than the first groove and receives a lid on the first groove, inside a body, receives the lid on the second groove, and is joined to the body, the manufacturing method of a cooling plate wherein, while the lid and the body are joined together by the friction stir welding owing to insertion of a rotation tool having a shoulder and a pin, the joining is performed so that a weld bead formed by

Abstract: The invention relates to a plate-type heat exchanger, in which at least one first flow passage (16) for a first medium is provided between two plates (12 and 14), which form a plate pair (13). A plurality of second flow passages (18), which are connected in parallel, for a second medium are provided between two plate pairs (13). To provide a novel, improved heat exchanger, which is easier to produce, it is proposed that the second, parallel-connected flow passages (18) are formed in each case by one plate (14, 12) from adjacent plate pairs (13).

Abstract: A heat exchange cell for a recuperator includes top and bottom plates sandwiching a matrix finned member and a pair of header finned members. The top and bottom plates each include a pair of manifold openings, and the header finned members each include a curved free edge following the curvature of an associated manifold opening. The header finned member includes a high fin density portion along the free edge and a low fin density portion communicating with the high fin density portion. The dual fin density header finned member thus provides increased structural strength along the free edge and provides a low pressure drop through the low fin density portion.

Abstract: The heat exchanger according to the invention consists of two flat or slightly incurved parallel surfaces formed in two sheets of metal (2) and (3). The longitudinal edge pieces (8) and (9) and transverse edge pieces (12) and (13) have rounded edges. The entire exterior surface is coated with enamel. These exchangers may be used in groups of several parallel units arranged inside a tubular body, or they may be disposed in a radiating pattern inside a cylindrical tank in a chemical reactor, forming a complex exchanger. This invention is of interest to manufacturers of industrial heat exchangers, particularly exchangers designed for the chemcial, pharmaceutical or agricultural/food industries.

Abstract: This invention concerns a liquid cooled dissipator for electronic components characterized by selectively arranged dissipation fins, namely fins positioned only in proximity of the areas against which the electric components to cool are mounted.

Abstract: Method for carrying out in continuous, under so-called pseudo-isothermal conditions and in a predetermined reaction environment, such as a catalytic bed, a selected chemical reaction, comprising the steps of providing in the reaction environment at least one heat exchanger fed with a first flow of a heat exchange operating fluid at a respective predetermined inlet temperature, the fluid passing through at least one heat exchanger according to a respective inlet/outlet path, which method also provides feeding into at least one heat exchanger and at one or more intermediate positions of said path, a second flow of operating fluid having a respective predetermined inlet temperature.

Abstract: A machining method for an integrated piping plate, for example, composed of a plurality of plates joined together, and in which an instrument and a component constituting an apparatus, or the instrument, or the component are or is disposed on one surface or both surfaces of the integrated piping plate, and the instrument and the component, or the instrument, or the component are or is connected by fluid channel grooves formed in joining surfaces of the plates, and communication holes formed in the plates. The machining method welds the joining surfaces of the plates around the entire periphery of the fluid channel grooves, for example, by an FSW welding machine, to join the plates. Compared with joining of the plates by an adhesive, the machining method can increase the durability of the plate joining portion and increase pressure resistance. Also, the method can increase work efficiency and further downsize the integrated piping plate.

Abstract: A heat exchanger for use with a furnace, each heat exchanger includes a plurality of heat exchanger elements. Each heat exchanger element includes a pair of clamshells sealingly attached to one another. The heat exchanger element includes a longitudinal axis. A pair of depressions are disposed in each respective said pair of clamshells. The depressions face one another to form a passageway wall and a serpentine fluid passageway therebetween. At least a portion of the serpentine fluid passageway extends along the longitudinal axis. A plurality of enhancements are formed in the depressions and are disposed within the portion of the serpentine fluid passageway. The plurality of enhancements project into the serpentine fluid passageway. Each enhancement constitutes a corrugation having a substantially trapezoidal longitudinal cross-section. A longitudinally positioned passageway wall portion is extended between each adjacently positioned enhancements within each clamshell.

Abstract: A water cooled hot air slider plate with a cooling channel, through which a cooling medium flows. A seal extends over the perimeter of the plate, both sides of the plate with the exception of the seal are joining a seal adapted to adjoin a seal seat of a slider housing being covered with a heat-insulating material. The part of the slider plate limited by the seal is formed by a core plate which incorporates bores extending in the plane of the plate which bores are in fluid connection with one another to form a predetermined meandering cooling channel.

Abstract: A heat exchanger includes an extruded base member having a planar central portion and spaced-apart cooling fins extending from one side of the planar central portion. A cross-over member is located on the other side of the planar central portion and includes a plurality of spaced-apart flow channels that communicate with inlet and outlet manifolds formed in the base member or the cross-over member, or partially in both the base member and the cross-over member.

Abstract: A liquid-cooled heat sink is provided having a cooling housing including a peripheral side wall extending from the perimeter of a bottom wall and a lid sized to engage the peripheral side wall so as to form a chamber. A fluid inlet port and a fluid outlet port are defined through the lid, and disposed in fluid communication with the chamber. In one embodiment, a plurality of pins project outwardly from the bottom wall so as to be positioned within the chamber and arranged in a staggered pattern. The pins include an end that engages the undersurface of the lid. In an alternative embodiment, a corrugated fin having a plurality of corrugations is positioned within the chamber so that at least one of the corrugations engages the bottom wall and at least one of the corrugations engages the under surface of the lid.

Abstract: A heat exchanger made of aluminum includes a plurality of first plates and a plurality of second plates stacked alternately in the direction along the thickness thereof. The first plates and the second plates each constitute a three-layer structure. A first sacrificing material layer is clad on the side surface of a first core member making up each of the first plates nearer to a cooling water path and a second sacrificing material layer is clad on the side surface of a second core member making up each of the second plates nearer to the cooling water path. A first brazing material layer is clad on the side surface of the first core member nearer to an oil path, and a second brazing material layer is clad on the side surface of the second core member nearer to the oil path.

Abstract: A liquid-cooled heat sink is provided having a cooling housing including a peripheral side wall extending from the perimeter of a bottom wall and a lid sized to engage the peripheral side wall so as to form a chamber. A fluid inlet port and a fluid outlet port are defined through the lid, and disposed in fluid communication with the chamber. In one embodiment, a plurality of pins project outwardly from the bottom wall so as to be positioned within the chamber and arranged in a staggered pattern. The pins include an end that engages the undersurface of the lid. In an alternative embodiment, a corrugated fin having a plurality of corrugations is positioned within the chamber so that at least one of the corrugations engages the bottom wall and at least one of the corrugations engages the under surface of the lid.

Abstract: A plastic heat exchanger which is simple and inexpensive. The heat exchanger includes an outer duct and a stack of inner ducts, the inner ducts for establishing a first flow path for cooling air or air to be cooled. Each inner duct includes end portions which are stackable upon one another and a middle portion which has a reduced dimension. A seal is placed about each stack of end portions and a second flow path for cooled air or cooling air is formed within the outer duct, between the seals and around the outside of the middle portions of the inner ducts.

Abstract: The apparatus is a heat pipe with superior heat transfer between the heat pipe and the heat source and heat sink. The heat pipe is held tightly against the heat source by mounting holes which penetrate the structure of the heat pipe but are sealed off from the vapor chamber because they each are located within a sealed structure such as a pillar or the solid layers of the casing surrounding the vapor chamber. Another feature of the heat pipe is the use of more highly heat conductive material for only that part of the wick in the region which contacts the heat source, so that there is superior heat conductivity in that region.

Abstract: An exchanger comprises a plurality of plates (8) made of copper, nickel or aluminium or an alloy of these metals, which are separated by exchange corrugations made of copper or a copper alloy (6) and two outer sheets (7). The distance between the plates is more than 6 mm, optionally 8 mm.

Abstract: The invention relates to a plate heat exchanger that consists of several pieces of sheet metal that are arranged parallel to one another, that are at least partially corrugated and that form a considerable number of heat-exchange passages. A header creates a flow connection among at least some of the heat-exchange passages. At least two parts (1, 2, 3) of the plate heat exchanger consist of metallic materials that cannot be welded to one another.

Abstract: A thermal control system includes an air colliding chamber bounded by at least a conducting board and an insulating panel. An air jet pipe and an air jet suction pipe extend into the air colliding chamber. Thermally adjusted air is urged into each air jet pipe, and out at least one air jet hole, into the air colliding chamber. In the air colliding chamber, air vortices repeatedly contact the conducting board and thermal transfer occurs. Return air is urged into each air suction pipe through at least one jet suction hole for return and thermal adjustment.

Abstract: A heat exchanger includes a plurality of plates, and a plurality of sharp-cornered carbon/carbon fins between the plates.

Abstract: A heat transfer apparatus with a zigzag passage is provided. The apparatus includes a pair of opposed plates 11, 12, a bent plate 21 having a wavy cross sectional shape for dividing the space between both plates into a plurality of side-by-side passages 20a, 20b, and a pair of cover members 13, 14, bonded to the bent plate 21, for forming connecting portions 20c, 20d between the side-by-side passages. One sidewall portion 23a of both sidewall portions 23a, 23b of the bent plate 21 is coupled to the cover member 13 on one end of a rectangular groove. The other sidewall portion 23b is coupled to the cover member 14 on the other end of the rectangular groove. Thus, a zigzag passage 20 is formed in which one side of the rectangular groove is folded to oppose the other side of the rectangular groove.

Abstract: A heat transfer device, particularly an exhaust gas heat transfer device, having a tube bundle made of rectangular tubes for guiding the gas. A jacket surrounds the tube bundle; is used for guiding the liquid coolant and is equipped with a coolant inlet 17 and a coolant outlet 18. The rectangular tubes of the tube bundle 10 are provided with outwardly directed projections 22 which determine the distance of adjacent rectangular tubes with respect to one another and to the interior wall of the jacket 11.

Abstract: A heat exchanger element has at least two stacked metal sheets connected to one another such that flow channels are formed between facing sides of the metal sheets. The flow channels allow flow of a heat exchanger medium therethrough. The metal sheets are made of a reactive metal and are connected by electron beam welding in vacuum. The heat exchanger elements are manufactured by introducing at least two metal sheets into a hermetically sealed vacuum chamber and partially connecting by electron beam welding in vacuum the at least two metal sheets to one another to form an intermediate product. The intermediate product is further processed to build a heat exchanger element.

Abstract: Apparatus for cooling an electronic device, and a resultant fluid-cooled electronic apparatus are provided. In one embodiment, the apparatus includes a heat sink member with a surface for making thermal contact with the electronic device. The heat sink member has a plurality of channels for carrying coolant fluid. The plurality of channels are positioned in a first group and a second group such that coolant flow alternates across the member. At least one cross-flow opening is provided between at least some adjacent channels of the plurality of channels so that coolant flow can flow within the member between the first group of channels and the second group of channels.

Abstract: A recuperator for a gas turbine engine comprises a plurality of cells that are orientated in an annular array and attached to one another at only the radially inner edges thereof. Each cell comprises a high pressure plate having spaced integral ribs thereon defining a plurality of low temperature compressed air passages and a low pressure plate having a plurality of spaced ribs defining a plurality of high temperature exhaust gas passages.

Abstract: A plate type heat pipe comprises: (1) a container including a plate member having a surface to which a heat generating part is connected, and another plate member positioned in such manner to face the plate member and to form a hollow portion therebetween, (2) a folded portion extended outward of the container, which is formed in such manner that end portions of respective plate member and another plate member are placed to form layers, and thus placed layers are folded in one side to cause the hollow portion to be hermetically sealed, and (3) a working fluid enclosed in the hollow portion.

Abstract: The module is formed from two sheets welded to each other by laser welding. Longitudinal weld beads define between them longitudinal ducts for the flow of a first fluid. The sheets are also joined together by a peripheral weld bead. The weld bead defines, beyond the longitudinal ducts, a transition zone which narrows from the longitudinal ducts up to the gap. Weld spots are previously formed in this zone. Once the welds are completed, the module is formed by the injection of a fluid under pressure through a gap in the weld bead. Utilization for rendering mutually compatible the variations in width of the module during hydroforming in the end regions and for forming, with the transitions zone, a flow distributer to the various channels during operation.

Abstract: An integrated oxidation-reduction process whereby a thermal oxidation zone and a NOx reduction zone are incorporated into a single device. A thermal oxidation and catalytic reduction system having a multi-spiral, heat recuperative configuration and including a lean NOx catalytic section disposed in the low-temperature regions is disclosed, as is a corresponding method. The catalyst may be disposed on the oxidizer walls or on a matrix of porous inert media disposed in the spiral passages of the oxidizer. A film-injection technique to selectively provide reactants to the catalyst surface is also disclosed. The catalyst may be limited to a concave portion of a sidewall to diminish boundary layer separation of the reactants.

Abstract: A system for the thermoregulation of a room with radiant panels, comprising a source for feeding thermovector liquid; radiant panels in which a thermovector liquid passes; the radiant panels comprising a rear wall and a front or radiant wall for thermal exchange with a room to be thermoregulated and, between the radiant wall and the rear wall, a gap space wherein channels are confined having a linear development, sweeping all the radiant wall completely covering the area thereof from behind, for a passage of the thermovector liquid so guided as to uniformly, entirely sweep the radiant wall. The radiant panels are built from aluminum box elements, and thermal exchange promoting twisted strips are arranged in the channels.

Abstract: A cooling tunnel (1) includes a driven conveyor belt (4) being designed and arranged to support articles of candy (6) and to convey them through the cooling tunnel (1) in a moving direction (5). A treating region (11) for articles of candy (6) is surrounded by an insolating plate (9) and by a cover (10). An upper cooling unit (13) is arranged in a region above the conveyor belt (4). The upper cooling unit (13) includes a channel being designed and arranged for cooling air to flow therethrough. A bottom cooling unit (12) is arranged in a region below the conveyor belt (4). The bottom cooling unit (12) includes a cooling plate (14) being designed and arranged for cooling liquid to flow therethrough. The cooling plate (14) in the treating region (11) is designed and arranged to be spaced apart from the insolating plate (9) in a vertical direction. A free space (16) is formed between the cooling plate (14) and the insolating plate (9).

Abstract: A weld-free heat exchanger assembly core includes a plurality of stacked fin-plate assemblies. A separate enclosure bar is positioned at the end of each fin-plate assembly. A plurality of apertures are pre-drilled in the enclosure bars before assembly of the core. Once the core is assembled, it is brazed to form a unitary structure. Apertures formed in the inlet and outlet manifolds are aligned with apertures formed in the enclosure bars and fasteners are inserted into the aligned apertures. The fasteners serve to draw each manifold into tight engagement with a plurality of separate enclosure bars.

Abstract: The invention relates to a heat exchange element (1) which is made up of a bag of a film material, such as plastic film, and to a heat exchanger made up of such heat exchange elements, the heat exchanger being suitable, for example, for the evaporation of effluents which contain solid matter, such as effluents from bleaching. The transfer of heat takes place in the bags (1) from a vapor condensing in the interior (3) of the bags to a liquid evaporating on their exterior surfaces (2). The forming evaporated vapor may be recycled via a compressor to the interior of the bags as heating vapor so that the heat exchanger will function as a distillation apparatus.

Abstract: The apparatus is an easily assembled, fluid cooled, single phase heat sink. The heat sink is constructed of only four simple parts, a pan shaped casing, a simple thermally conductive porous pad, a manifold block with channels, and a lid. The lid includes input and output fluid holes which are interconnected to sets of alternating channels in the manifold block, so that adjacent channels are isolated from each other and are connected to only either the input or the output holes. Thus, the only access between the adjacent input and output channels is through the porous pad which is sandwiched between the manifold block and the bottom of the casing. Fluid flow through the porous pad thereby cools the entire bottom of the casing which is held in heat transfer relationship with a heat source.

Abstract: A heat dissipator includes a heat-conductive substrate, a lid and a heat-conductive cover layer, and a coolant groove for passing a coolant therethrough is formed on a major surface of the substrate. The lid is positioned on the coolant groove to seal the same, and the cover layer covers the major surface of substrate and the lid. The lid may be received in a lid groove to be flush with the major surface of the substrate. The substrate, lid and cover layer are all made of diamond, and are joined together with substantially no other material therebetween. Thus, a high heat conductivity is achieved. The heat dissipator can be a heat dissipating substrate for an electronic component, or an optical transmission window.

Abstract: A clamshell heat exchanger (10) is provided for use in a heating apparatus including a burner for producing hot combustion gas. The heat exchanger (10) defines a multi-pass flow passage (11) for the combustion gas and includes a first plate member (30) and a second plate member (32). The first plate member (30) has a first series of parallel ridges (36) and valleys (38a-b), with at least one of the valleys (38a) being deeper than other of the valleys (38b). The second plate member (32) faces the first plate member (30) and includes a second series of ridges (36) and valleys (38a-b) that are parallel to the first series of ridges (36) and valleys (38a-b), with at least one of the valleys (38a) of the second series being deeper than other of the valleys (38b) of the second series. A first pass (14, 16) of the multi-pass flow passage (11) is defined by a number N1 of the ridges (36) and valleys (38a-b) of the first and second series.

Abstract: A microcooling device and a method for its manufacture. The microcooling device has a high heat conductivity, is designed to accommodate electronic components on its exterior surface, and has a channel structure in its interior through which a coolant fluid can flow to carry heat away from the components. The channel structure is formed by a base substrate provided with a plurality of recesses and a cover layer externally covering the recesses, the cover layer being made from an electrically insulating and heat-conducting material, and being such that the electronic components can be mounted directly thereon.

Abstract: The invention concerns a cooling body having at least one cooling duct for receiving a cooling medium which is fed to the cooling duct at a predetermined speed, the cooling duct comprising a plurality of stall centers.

Abstract: The present invention relates to an air inlet cowl (9) for a jet engine, especially for an aircraft. According to the invention, the diffuser (12) of hot air for de-icing, arranged in the hollow leading edge (16) of the cowl (9) is in the form of a polygonal ring and is fixed by elastic support tabs (24) each equipped with a ball joint (25) holding a straight portion (22) of the polygonal ring.

Abstract: The invention discloses the manufacture of a metal tank comprising the following steps: coating a strip of sheet steel with a thermally adhesive polymer based layer, preparing segments provided with assembly zones from the blanks of the said coated sheet, assembling the said segments at the assembly zones, consolidating the assembly by cold mechanical assembling means and heating to activate bonding of the polymer layers in contact at the assembly zones. The invention is useful in particular for manufacturing fuel tanks and heat exchangers.

Abstract: The invention relates to a cooling body comprising a heat-conducting insulator and having lugs that are attached in the interior of the cooling body.

Abstract: A heat exchanger, in which an alternating flow of supply air and exhaust air are supplied in opposite directions between a plurality of stacked heat exchanging members, is characterized in that the heat exchanging members each is composed of a first paper member having a moisture permeability and corrugated in the width direction and having flat portions at the longitudinally opposite ends flattened under pressure, and a pair of second paper members having one end joined to the flat portions and the other end side extending flatly in the longitudinal direction to define a header defining portion for defining a header portion, so that the number of the parts can be decreased and the assembly can be made easier, whereby a heat exchanger with an improved productivity can be provided. A method for manufacturing a heat exchanger is also disclosed.

Abstract: A redundant refrigeration system is used in conjunction with a dual passage cold plate to provide reliable cooling for electronic circuit modules particularly to such modules which incorporate computer processors for which long term "up time" is very highly desirable. Separate compressor-expansion device-condenser refrigeration systems are coupled to a single cold plate which maintains flow-wise isolation between refrigerant streams while at the same time providing close thermal coupling.

Abstract: Heat-exchanging conduit tubes for a laminated heat exchanger made of aluminum material containing aluminum alloy having a brazing material claded and formed by folding one plate or overlaying two plates and brazing to connect edge joints of the folded plate or the overlaid plates, wherein the folded plate or the overlaid plates have projections protruded from one or both faces of the opposed plates toward the other plate, the projections are joined in contact with a flat face of the other plate or the projections of the other plate, and the edge joints of the folded plate or the overlaid plates are joined, and the height of the edge joint of the each plate is smaller than those of the projections. Thus, the heat-exchanging conduit tubes can be securely brazed to provide flat tubes having a satisfactory pressure resistance, and a method for producing them can be attained.

Abstract: A removable device for melting and preventing the accumulation of ice and snow on walkway and driveways is disclosed. The apparatus includes a series of interconnected pads of various lengths and widths which are heated to a temperature which is sufficient to prevent the accumulation of ice and snow.

Abstract: A mounting or end bracket is disclosed for producing plate and fin heat exchangers of the type having a plurality of stacked, hollow plate pairs or tubes including mating end bosses having communicating openings formed therein to form a manifold for the flow of fluid through the plate pairs or tubes. Fins are located between and at the top end bottom of the stacked plate pairs or tubes extending between the end bosses. End fittings are used for the inlet and outlet of fluid to the plate pairs or tubes. The mounting brackets allow the end fittings to be positioned where desired to define different flow circuits through the plate pairs, and also allow different size end fittings to be used, without having to use special spacers, different size fins or specially shaped plates to accommodate the different end fittings. The mounting brackets have a planar central portion and opposed offset end portions located in a plane parallel to and spaced from the central portion.

Abstract: The present invention discloses a method a method of making a material for thermal cores and the material so made. In particular, the present invention disclose a method including the steps of applying thermally conductive particles over at least a portion of a fiber layer, providing another fiber layer upon the fiber layer, and repeating the above steps as desired. In another aspect of the present invention is disclosed a method of making a thermally conductive material including applying thermally conductive particles upon at least a portion of a fiber prepreg layer, providing another fiber prepreg layer upon the fiber layer, repeating the above steps as desired, and bonding the fiber prepreg layers, including the thermally conductive particles, together. The material in accordance with the present invention includes a plurality of layers made of thermally conductive fibers bonded by a resin, and a plurality of interposed layers of resin having a high concentration of high conductivity particles therein.