Abstract: The present invention is directed towards a fired heater for heating a process fluid that uses U tubes provided with increased internal heat transfer surface to reduce tube metal temperatures and coking. and at the same time is not prone to plugging from coke. The fired heater comprises a radiant section enclosure with a number of U tubes in the radiant section. The U tubes are formed by connecting one or more tubular sections, and the U tubes are provided with internal generally longitudinal fins. The invention also is directed towards a process utilizing a fined heater with U tubes as disclosed for producing olefins from hydrocarbon feedstocks.

Abstract: A heat exchanger includes a corrugated metal sheet comprising a first side having a plurality of first troughs alternating with a plurality of first peaks, and a second side having a plurality of second troughs alternating with a plurality of second peaks, each trough being formed by a pair of walls, each wall separating the first side from the second side and extending from a first peak to a second peak, the troughs and peaks extending in parallel and defining a longitudinal direction. Each first peak is formed with at least one depression, the depressions in respective peaks being aligned to form at least one tube-receiving channel extending transversely to the longitudinal direction. Each depression has a contact surface formed in the first side and extending laterally over each adjacent first trough. A tube section is received in each tube-receiving channel in substantially conforming contact with the contact surfaces.

Abstract: An assembly of multiple heat sink fins is comprised of multiple fins overlapped on one another and penetrated through by a heat conducting tube, each fin being provided at where close to the edge of the fin with a hole in a diameter slightly smaller than the outer diameter of the conducting tube to receive insertion of the conducting tube; an opening connected through the hole being formed on the edge of the fin; and the fin allowing the conducting tube being compressed into the hole through the opening as a clamp ring to secure the fin to the tube.

Abstract: A heat exchanger/heater comprising a tubular member having a fluid inlet end, a fluid outlet end and plurality of pins secured to the interior wall of the tube. Various embodiments additionally comprise a blocking member disposed concentrically inside the pins, such as a core plug or a baffle array. Also disclosed is a vapor generator employing an internally pinned tube, and a fluid-heater/heat-exchanger utilizing an outer jacket tube and fluid-side baffle elements, as well as methods for heating a fluid using an internally pinned tube.

Abstract: An economically formed tube of rectangular or oval-like cross section and with a corrugated internal fin includes spaced, relatively long side wall sections joined at their ends by relatively short end wall sections. An integral fin within the tube has crests and valleys defining a plurality of flow paths within the tube and is formed of a corrugated section of a strip employed to form one of the side walls and at least part of both of the end walls.

Abstract: A folded multi-passageway flat tube is disclosed, which is made from a flat sheet metal strip and has folded webs and a longitudinal seam. Through-openings for improving the heat transfer and for generating transverse flow are provided in the folded webs. The through-openings are advantageously made by punching in the flat sheet metal strip, that is to say before folding, and are made congruent after folding. These folded multi-passageway flat tubes are preferably used for refrigerant condensers in motor vehicle air-conditioning systems.

Abstract: Disclosed is a catalytic pipe for an endothermic catalytic reaction of a process medium, with an outer cladding tube which is tightly closed at its end sides by a first base and a second base. A rising pipe arrangement is arranged in the interior of the cladding tube and is connected, in the vicinity of the first base, with an outlet which is guided outward for the product resulting from the catalysis of the process medium. According to the invention, the rising pipe arrangement is formed by a plurality of line strands which end in a collector which is connected to the outlet for the product.

Abstract: A heating panel system comprises a cylindrical hot water pipe. The pipe is in a linear configuration. A plurality of rigid fins is provided. The fins have apertures. The apertures allow the fins to be positioned over the pipe. In this manner inlet openings are formed. The inlet openings are of an enlarged size beneath the pipe and outlet openings. The pipe and outlet openings are of a reduced size above the pipes. In this manner the flow of heated air between the fins and across the pipe is increased due to venturi configuration of the design.

Abstract: A coolant tube for use in a heat exchanger is manufactured by using a plate member as follows: the plate member is folded in substantially regular distances to form a plurality of folded portions; and two opposite ends of the plate member are joined in a manner that end parts of the folded portions are brought into contact with flat portions of the plate member to thereby form coolant flow passages.

Abstract: A heat exchanger (1) is formed by stacking tubes (2) formed by rolling a flat tube material (10) with a fin (3) interposed between the adjacent tubes, joining tanks (4), (5) and the tubes, (2) to appropriately communicate the tubes (2) and the tanks (4), (5), wherein the tube (2) is provided with a partition (22) for dividing a passage (6) of the tube (2) into passages (6),(6) and the partition (22) has an extra section for absorbing a deformation produced when a partition part (30) and the tube are formed.

Abstract: The apparatus is an assembly of cooling fins attached to pipes or heat pipes. The fins are formed into a corrugated configuration of troughs and peaks with large sections of the peaks removed to permit air flow along the depths of the troughs as well as along the lengths of the troughs. Holes are also formed into the fins to accept and grip a pipe or heat pipe. The preferred embodiment has holes surrounded by split collars formed into each fin, with the collars aligned to accept and grip the pipe.

Abstract: A heat exchanger tube for use in a vehicle, including a tube extending in an axial direction and having an end. The end has a first and second appendage attached to it. The first and second appendages are spaced from one another such that the second appendage does not form an enclosed space with the first appendage.

Abstract: The apparatus is an assembly of cooling fins attached to pipes or heat pipes. The fins are formed into a corrugated configuration of troughs and peaks with large sections of the peaks removed to permit air flow along the depths of the troughs as well as along the lengths of the troughs. Holes are also formed into the fins to accept and grip a pipe or heat pipe. The preferred embodiment has holes surrounded by split collars formed into each fin, with the collars aligned to accept and grip the pipe.

Abstract: A fluid pipe (14) for fluid flow between a pair of manifolds of a heat exchanger and which is formed from a single piece of sheet metallic material having a cladding on at least one surface, the fluid pipe having a first side wall (40) having a first portion (46) and a second portion (48); a second side wall (42) extending substantially parallel to and spaced from the first side wall; a pair of end walls (44) connecting the first and second side walls; first, second and third internal walls (50-54) positioned internally of the first and second side walls and the end walls, the first, second and third internal walls being spaced apart and spaced from the end walls, and extending between the first and second side walls, the first internal wall being of double the thickness of the sheet and being positioned intermediate the second and third internal walls; a first planar side portion (56) connecting the first and second internal walls and contacting a first planar part (58) of the internal surface of the second

Abstract: A fluid conveying tube for a vehicle cooler comprises at least two longitudinal ducts, each comprising two opposite, longitudinal primary heat exchange surfaces. At least one primary surface in each duct of the tube has a projecting surface structure. In a method of manufacturing such a tube, starting from a blank, use is made of a device, which has a feeder for feeding the blank through the device and a surface forming station for forming the surface structure on a portion of the blank surface. Furthermore, the device comprises an edge forming station for forming two opposite edges of the blank into two upright edge portions, which between themselves define an at least partly essentially flat web portion. In addition, the device comprises a duct forming station for making the edge portions abut against each other and against the web portion with a view to defining said ducts.

Abstract: A cold plate and a method of forming the cold plate are provided that efficiently and cost effectively cools electrical components. The cold plate includes a flattened tube formed from a circular extruded tube to have a top surface and a bottom surface that are substantially parallel and contiguously connected by rounded corners and defining an interior space. The circular extruded tube includes a plurality of ins extending into the interior space form inner walls thereof to form a plurality of channels in said flattened tube between said fins for defining a cooling liquid passage therethrough. The fins may extend parallel to the direction that the flattened tube extends, or extend at a predetermined angle to the direction that the flattened tube extends. Also, the fins associated with the top surface may extend at an angle to the fins associated with the bottom surface to form a plurality of intersecting points which form a torturous fluid flow path.

Abstract: A heat exchanger tube, having at least one twisted baffle therein, each of said twisted baffles extends in the inside of the heat exchanger tube along the axis thereof, said twisted baffles extends as long as at least a part of the entire length of said heat exchanger tube, and said twisted baffles are integrated with the inner surface of said heat exchanger tube. The twisted angle of said twisted baffles is between 100° to 360°. The ratio between the axial length of said heat exchanger tube with the twisted angle 180° of said twisted baffles and the internal diameter of said heat exchanger tube is 2 to 3. The thickness of said twisted baffles is approximated to that of said heat exchanger tube; in every cross section of said heat exchanger tube, the transition zone from the surface of said twisted baffles to the surface of said heat exchanger tube, and vice versa, is in the shape of a concave circular arc.

Abstract: A heat exchanger tube, which has a high pressure resistance, includes a tube body, wherein the interior of the tube body defines a fluid flow passage. The inner and outer surfaces of the tube body of the heat exchanger tube defines heat entrance and exit surfaces for the fluid. The tube body of the heat exchange tube has first and second wall portions which are opposed to each other. Either the first wall porition has a plurality of bowl-shaped bulging wall portions which bulge toward the direction of the second wall portion to fixedly meet the second wall portion or else both the first and second wall portion both have a plurality of bowl-shaped bulging wall portions which are correspondingly located so that a bulging leading end of a bowl-shaped bulging wall portion in a first wall portion bulges toward and fixedly meets a bulging leading end of a bowl-shaped bulging wall portion in the second wall portion which bulges toward the first wall portion.

Abstract: The invention relates to a nozzle structure for rocket nozzles having a cooled nozzle wall comprising a large member of closely spaced cooling channels (2) extending from the inlet end of the nozzle to its outlet end. To facilitate the production of the cooled nozzle wall, it is suggested according to the invention that said nozzle wall consists of several elongated panels (11) which extend from the inlet to the outlet end of the nozzle and are joined together at their longitudinal side edges (7) and in each of which is formed a number of said cooling channels (2) which extend in the longitudinal direction of the panels (11).

Abstract: A heat exchanger is constructed by tubes, corrugated fins and head pipes, which are assembled together. Herein, the tube is constructed by bending a flat plate whose surfaces are clad with brazing material to form a first wall and a second wall, which are arranged opposite to each other with a prescribed interval of distance therebetween to provide a refrigerant passage. Before bending, a number of swelling portions are formed to swell from an interior surface of the flat plate by press. By bending, the swelling portions are correspondingly paired in elevation between the first and second walls, so their top portions are brought into contact with each other to form columns each having a prescribed sectional shape corresponding to an elliptical shape or an elongated circular shape each defined by a short length and a long length.

Abstract: A flat heat exchange tube comprises an upper wall, a lower wall, right and left side walls interconnecting right and left side edges of the upper and lower walls, and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another. The tube has parallel fluid passages formed inside thereof and extending forward or rearward. Each of the reinforcing walls has a plurality of communication holes arranged at a spacing longitudinally thereof for holding the parallel fluid passages in communication with one another therethrough. The upper surface of the lower wall is provided at a portion thereof forming each of the fluid passages with a plurality of turbulence producing portions extending over the entire width of the fluid passage and arranged at a spacing longitudinally of the passage.

Abstract: The present invention is directed towards a fired heater for heating a process fluid that uses U tubes provided with increased internal heat transfer surface to reduce tube metal temperatures and coking and at the same time is not prone to plugging from coke. The fired heater comprises a radiant section enclosure with a number of U tubes in the radiant section. The U tubes are formed by connecting one or more tubular sections, and the U tubes are provided with internal generally longitudinal fins. The invention also is directed towards a process utilizing a fined heater with U tubes as disclosed for producing olefins from hydrocarbon feedstocks.

Abstract: An air-conditioning system for a motor vehicle contains a heat exchanger with a heat-exchanger tube that features a profiled central channel and outer channels grouped around the central channel. This heat-exchanger tube is suitable for the construction of counterflow heat exchangers. For this purpose, the heat-exchanger tube is to be cut to corresponding lengths and provided with corresponding end pieces. Such heat exchangers have proven to be light, pressure resistant, and effective.

Abstract: A multichannel flat tube for a heat exchanger has a plurality of parallel flow channels aligned in a row, side by side, along a transverse axis of the tube. At least the inner flow channels have oval cross-sections, and major semiaxes of the inner flow channels are inclined relative to the transverse axis of the tube at an acute angle. The flat tube can be designed for high operating pressures with relatively low weight and relatively high heat exchange capability. The construction may be used, for example, in CO2 air conditioners in motor vehicles.

Abstract: This invention relates to a pipe (1) having several internal ribs (2, 3, 4) having a spiral twist, where the ribs run with rotational symmetry with the longitudinal axis (5) of symmetry of the pipe (1). This invention creates a heat transfer pipe that will be characterized by a much better heat transfer in comparison with the previously known pipes having internal ribs, and to this end it guarantees not only an increase in the internal heat transfer surface area but also an effective cross-flow between the inside wall surface of the pipe and the core flow near the longitudinal axis of symmetry. To that end, the free ends (2c, 3c, 4c) of the internal ribs (2, 3, 4) are a distance (a) from the longitudinal axis (5) of symmetry of the pipe (1), which is in the range of 1:12 to 1:3 in relation to the inside diameter (d) of the pipe; and all the internal ribs (2, 3, 4) run in the same direction (arrow 6) and with the same spiral length (L) with a spiral twist to the longitudinal axis (5) of symmetry.

Abstract: A tube for a heat exchanger consists of a folded metal strip having an outer face covered rod with a plating of brazing alloy (31) and including at least one folded border (28) having a sheared edge bearing on an inner face (34) of the metal strip. The metal strip is folded by passing through a series of successive rollers. The sheared edge is covered with a layer of brazing alloy (31) which has advantageously been pushed back by the rollers from the outer surface towards the sheared edge. According to the method, the metal strip is made to pass between a series of rollers, each roller including a surface which exhibits an inclination with respect to the rotational axis of the rollers, the inclinations of the successive rollers continually increasing.

Abstract: A fluid pipe (14) for fluid flow between a pair of manifolds of a heat exchanger and which is formed from a single piece of sheet metallic material having a cladding on at least one surface, the fluid pipe having a first side wall (40) having a first portion (46) and a second portion (48); a second side wall (42) extending substantially parallel to and spaced from the first side wall; a pair of end walls (44) connecting the first and second side walls; first, second and third internal walls (50-54) positioned internally of the first and second side walls and the end walls, the first, second and third internal walls being spaced apart and spaced from the end walls, and extending between the first and second side walls, the first internal wall being of double the thickness of the sheet and being positioned intermediate the second and third internal walls; a first planar side portion (56) connecting the first and second internal walls and contacting a first planar part (58) of the internal surface of the second

Abstract: An air-cooled condenser includes an upper header for distributing a vaporous medium to be condensed, a lower header for collecting condensate, spaced finned tubes with outer fins, the finned tubes being connected in parallel between the upper header and the lower header and cooled by a cooling air flow, means for draining the condensate form the lower header and extraction means for removing non-condensible gases from the condenser. The lower header is also used for distributing the vaporous medium to the finned tubes, so that the vaporous medium id fed into the finned tubes through both the upper and lower headers, and the extraction means are connected to each of the finned tubes at its portion facing the cooling air flow.

Abstract: A plurality of first projections 113a are provided in a first side wall portion 111a of a grooved section 111 formed by bending part of a sheet-like workpiece to have a U-shaped cross-section, which projections extend away from a connecting portion (top) 111c. Since the first side wall portion 111a deforms to widen a groove width of the grooved section 111 due to spring-back, a tip end of the first projection 113a is first brought into contact with the inner wall 110a. Therefore, a reaction force against the compressive force is applied to the tip end of the first projection during the pre-assembly process. Since the tip end of the first projection 113a is not movable due to the contact with the inner wall 110a, a bending moment is applied to the first side wall portion 111a and the connecting portion 111c to reduce the groove width.

Abstract: A flow conduit includes surface-enlarging members for cooling fluid in the flow conduit. The surface-enlarging members include cooling blades that extend outwards and downwards from the surface of the flow conduit.

Abstract: A heat exchanger assembly formed from primary structure comprising

Abstract: A system and method are provided for cooling transformers utilizing a fluid to air heat exchanger to cool dielectric fluid flowing through the transformer. The system includes multiple vertical cooling tubes in fluid communication with the transformer to cool the dielectric fluid. The tubes are configured to create vertical air passages such that the system utilizes natural convection air flow and thermal siphoning to cool the fluid.

Abstract: A heat exchanger according to the present invention has tube capable of flowing a fluid through interiors of the tube, a partition member provided in the tube to extend in the flowing direction of the fluid flows, a flow-through space determined by using the partition member in the tube, the fluid flowing through the interior of the flow-through space, and a non-flow-through space determined by using the partition member in the tube, the fluid being unable to flow through the interior of the non-flow-through space. Heat is exchanged between the fluid and the exterior of the tube. A portion of the tube corresponding to the non-flow-through space is mainly applied with an external action.

Abstract: An internal grooved tube according to the present invention comprises a large number of fine spiral grooves on the inside surface in parallel arrangement, wherein the grooves are formed to assure that the ratio of a groove width in the tube axial direction to a groove height is in the range of 1 to 2. A lead angle &thgr; of the grooves to the tube axis is preferably limited to 26 to 35 degrees. A method of manufacturing an internal grooved tube according to the present invention comprises the steps of inserting a grooved plug into a blank tube rotatably, and then pressing the blank tube against the outside surface of the grooved tube with several balls revolving both around the circumference of the blank tube and on its axis in a location of the grooved plug inserted, while drawing out the blank tube longitudinally in one direction, wherein the number of balls is limited to 2 to 3.

Abstract: With a grooved-inner-surface heat transfer tube, an inner circumferential surface of a metal tube is formed with fins bent at bent portions in a zigzag and extending consecutively around a circumferential direction of the inner circumferential surface, and at at least a part of the bent portions of the fins, the height of the fins is set at 30 to 90% of the height of the fins excluding the bend portions. With such a heat transfer tube, pressure loss can be suppressed while increasing heat exchange performance.

Abstract: A method for manufacturing a fin for a heat exchanger includes the steps of forming an intermediate pre-formed plate, which has adjacent zigzag strips, by passing a flat plate material between a pair of first processing rollers, and forming a fin by passing the intermediate pre-formed plate between a pair of second processing rollers to bend the zigzag strips at a portion connecting adjacent zigzag strips. The fin includes a plurality of waving strips arranged adjacent to each other in the transverse direction, which are offset in the longitudinal direction. The adjacent waving strips are connected only between the flat portions of the waving strips at a connection length less than or equal to a plate thickness. The fin may be manufactured readily and inexpensively. A heat exchanger using the fin as an inner or outer fin may exhibit superior performance.

Abstract: A flat heat exchange tube comprises an upper wall, a lower wall, right and left side walls interconnecting right and left side edges of the upper and lower walls, and a plurality of reinforcing walls connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another. The tube has parallel fluid passages formed inside thereof and extending forward or rearward. Each of the reinforcing walls has a plurality of communication holes arranged at a spacing longitudinally thereof for holding the parallel fluid passages in communication with one another therethrough. The upper surface of the lower wall is provided at a portion thereof forming each of the fluid passages with a plurality of turbulence producing portions extending over the entire width of the fluid passage and arranged at a spacing longitudinally of the passage.

Abstract: A refrigerant passage of an evaporator, in which refrigerant flows, is divided into plural sub-passages by partition wall portions of inner fins. The partition wall portions have plural louvers for flowing the refrigerant from an air flow downstream side sub-passage to an ajdacent air flow upstream side sub-passage. The louvers are alternately arranged on the partition wall portions with specific intervals in a refrigerant flow direction. Accordingly, refrigerant distributed amounts into the plural sub-passages can be adjusted to correspond to variations in thermal load on an air side.

Abstract: A multichannel flat tube for a heat exchanger has a plurality of parallel flow channels aligned in a row, side by side, along a transverse axis of the tube. At least the inner flow channels have oval cross-sections, and major semiaxes of the inner flow channels are inclined relative to the transverse axis of the tube at an acute angle. The flat tube can be designed for high operating pressures with relatively low weight and relatively high heat exchange capability. The construction may be used, for example, in CO2 air conditioners in motor vehicles.

Abstract: A refrigerant tube for a heat exchanger, comprising: a generally flat tube 10 having generally flat upper and lower walls 12/14; a plurality of reinforcing walls 16 connected between the upper and lower walls 12/14, the reinforcing walls extending along and generally parallel with a longitudinal axis A—A of the tube and being spaced apart from one another by a predetermined distance; and a plurality of communication holes 18 distributed along the length of each reinforcing wall 16, thereby defining a plurality of discrete wall portions 20 along each reinforcing wall 16, each of the discrete wall portions 20 being disposed between adjacent communication holes 18 and having an upstream edge 22 and a downstream edge 24 thereof, the communication holes 18 and discrete wall portions 20 having lengths L1 and L2, respectively, as measured along the longitudinal axis A—A, the communication holes 18 being spaced apart along each reinforcing wall 16 by a pitch P.

Abstract: A folded tube and method of making the same for a heat exchanger includes a base, a top spaced from and opposing the base, a first side interposed between the base and the top along one side thereof, and a second side interposed between the base and the top along another side thereof. The folded tube includes at least one of the base and the top having at least one internal web having an initial web width and initial outside shoulder radius and being compressed to compress the at least one internal web to a final web width less than the initial web width and a final outside shoulder radius less than the initial outside shoulder radius and defining a plurality of fluid ports.

Abstract: A folded tube and method of making the same for a heat exchanger includes a base, a top spaced from and opposing the base, a first side interposed between the base and the top along one side thereof, and a second side interposed between the base and the top along another side thereof. The folded tube includes at least one of the base and the top having at least one internal web having an initial web height and being compressed to extend the at least one internal web to a final web height greater than the initial web height and defining a plurality of fluid ports.

Abstract: There is disclosed an aluminum alloy tube whose outer surface is covered with a filler alloy by metal-spraying, wherein the base material of the tube has an uneven rough surface with the depth of 10 &mgr;m or more, and the difference between the highest projection of the base material surface and the highest projection of the filler alloy layer covering it is 3 to 25 &mgr;m; a heat exchanger, which is assembled by using the tubes; and a method of metal-spraying, which comprises metal-spraying an aluminum alloy filler powder in a melted state, by the high-velocity flame metal-spraying process, in which the filler contains 15 to 50% Si by weight, and the powder is mainly made up of particles whose diameter is 10 &mgr;m to 70 &mgr;m. The aluminum alloy tube is excellent in brazability and corrosion resistance, and by using the tube, it is possible to assemble a heat exchanger without allowing locally filler-unbonded parts to be formed.

Abstract: A heat transfer tube having an inner surface provided with a dense pattern of polyhedrons having crack-like cavities on at least two surfaces of a single polyhedron, forming three-dimensional crack-like cavities that enhance flow evaporation heat transfer. The tube is made by (a) forming in an inner surface for the tube a plurality of generally parallel first grooves, (b) forming in the inner surface and over the first grooves a plurality of generally parallel second fins extending at a first angle of between 0 and about 25 degrees relative to a longitudinal axis for the tube to thereby devolve the second angle fins into the pattern of cavities, and (c) forming in the second fins a pattern of generally parallel crosshatches extending cross-wise thereto.

Abstract: A cylindrical motor housing having a plurality of longitudinally extended substantially T-shaped radiating fins arranged in parallel and spaced around the periphery for dissipation of heat, and a plurality of invertedly disposed T-grooves defined between the T-shaped radiating fins for ventilation.

Abstract: An air-cooled condenser comprising a distributing chamber for distributing a vaporous medium to be condensed, a condensate collecting chamber and finned tubes with fins on air side, said finned tubes being connected in parallel between the distributing chamber and the condensate collecting chamber, where each of the finned tubes comprises two parallel essentially flat side walls and exterior closings connecting the side walls, in the finned tubes there are longitudinal separation walls connected to the side walls and dividing the inner space of the finned tubes into longitudinal parallel channels, and in the separation walls there are breakthroughs and closure elements for allowing the flow of the medium between neighboring channels.

Abstract: A heat dissipating arrangement for a damping system, such as the damping system of a bicycle suspension fork. The heat dissipating arrangement includes a heat sink, which, in a preferred embodiment, has a substantially cylindrical body and radially extending heat sink fins. The heat sink is either positioned over or around a damping cartridge or other damping system containing damping fluid or is formed as the damping cartridge itself. Preferably, the heat sink is positioned within the inner fork tube of a suspension fork with the heat sink fins in close proximity, and preferably contacting, the inner wall of the inner fork tube. Thus, the heat sink fins dissipate heat from the damping system to the inner fork tube. The pumping action of the suspension fork, as well as air passing over the fork as the bicycle is moving, dissipate heat from the fins, and thus from the heat dissipating arrangement and the damping system.

Abstract: A heat exchanger is constructed by laminating rectangular shaped partition walls and corrugated fins alternately. A first fluid passage through which a high temperature internal air and a second fluid passage through which the low temperature external air flows are formed into rectangular parallelopipe-shape the longitudinal direction of which is upper and lower direction. The corrugated fin is disposed inside the fluid passage to incline frontwardly. A first fluid inlet is provided at an upper position and a first fluid outlet is provided at a lower position of the first fluid passage. While, a second fluid inlet is provided at a lower position and a second fluid outlet is provided at an upper position of the second fluid passage. That is, the first fluid and the second fluid flow in an opposite direction to each other.

Abstract: The heat exchanger consists of at least partially connected fins, which run obliquely with respect to one another, and are disposed in a hollow-cylindrical fashion. The sides connecting the fins at their ends form the surfaces of the hollow cylinder. The heat exchanger is disposed between the extruder barrel and the band-shaped, flexible heating element of the heating and cooling configuration. Good heat exchange results, i.e. a quick heating up and cooling down of the extruder barrel and a homogeneous temperature distribution on the extruder barrel. The heat exchangers can be disposed in a row.

Abstract: The present invention is directed to a thermal storage system and auxiliary air conditioning systems employing the same, said system employs a heat exchange assembly made from profile board or corrugated board which provides a cost efficient and light weight device for storing an energy storing medium and then using the same at desirable times to provide cooling.