Abstract: A heat exchanger includes a plurality of flat, multi-channel heat exchange tubes extending between spaced headers. Each heat exchange tube has its inlet end in fluid flow communication to an inlet header through a transition connector. The transition connector has a body defining a divergent flow path extending from an inlet opening in its inlet end to an outlet opening in its outlet end, and a tubular nipple extending outwardly from the inlet end of the divergent flow path through the wall of the inlet header. The tubular nipple defines a fluid flow path extending between the inlet end of the divergent flow path of the transition connector and the fluid chamber of the inlet header. The inlet header has a lateral dimension less then the lateral dimension of the heat exchange tube.

Abstract: A tube support structure for heat transfer tubes in a steam generator has a plurality of tube support bars which are installed between the heat transfer tubes. At least one of the support bars has a first metal layer and a second metal layer. The first metal layer is preferably spot welded to the second metal layer at intervals. The first metal layer and second metal layer have different thermal expansion coefficients so that at room temperature the support bar is flat, and at the operating temperature of the steam generator the first layer forms a convex shape between the intervals to support the adjacent tube.

Abstract: A tube plate for exhaust heat exchangers, with punched openings to hold the tube ends of a tube bundle, wherein the openings are arranged grid-like with a web width b, and each of the openings has a shear surface with a height h produced by punching, and a bevel of depth t, that is manufactured before punching, and wherein the height h is roughly the same as or smaller than the web width b, is disclosed.

Abstract: A heat exchanger assembly comprising a heat exchanger with tank having a neck, and, in various embodiments, an assembly further comprising a hose to form a hose-neck connection is provided. A heat exchanger assembly comprising a hose-neck connection, having the advantage of providing for a connection resistant to temperature and pressure conditions of heat exchangers is provided. By providing for particular rib patterns on the neck, an optimized rib pattern can be found based on the environmental conditions and use of the heat exchanger assembly.

Abstract: An exhaust gas cooler and a method of manufacturing an exhaust gas cooler comprising providing a shell, disposing within the shell a tube bundle/core through which exhaust gas passes, and situating a seal or gasket assembly providing a liquid-tight seal between the shell and the tube bundle/core and between each tube of the tube/bundle core.

Abstract: The invention relates to a connection unit having a multi-channel heat exchanger with high-pressure channels and low-pressure channels and a connection element with a high-pressure reservoir and a low-pressure reservoir, both with a connection for connection. The axial end of the multi-channel heat exchanger is limited by a termination element that has axial passage holes for the high-pressure flow to the high-pressure reservoir. At the axial end of the multi-channel heat exchanger, in the region of the low-pressure reservoir, longitudinal slots are formed through which the low-pressure flow flows from the low-pressure channel to the low-pressure reservoir.

Abstract: The invention relates to a soldered heat exchanger. in particular a capacitor (1) for motor vehicles, comprising at least one collector tube (3) and a flange (5) which is secured to the collector tube (3) and which is used to receive connection tubes (6, 7). According to the invention, the flange (5) can be fixed and soldered to the collection tube (3) by means of at least one, preferably two supports (15, 16).

Abstract: The invention provides, among other things, a heat exchanger including a header, a number of tubes extending outwardly from the header, and an elastic sleeve supported between the header and one of the tubes to allow movement of the tube relative to the header in a direction substantially parallel to a length of the tube defined between a first end of the tube adjacent to the header and a second end of the tube spaced away from the header. Together, the tube, the header, and the elastic sleeve can at least partially define a flow path for a working fluid.

Abstract: A heat exchanger has tubes for performing heat exchange between an internal fluid flowing inside of the tubes and an external fluid flowing outside of the tubes and a tank connected to the tubes. Each of the tubes has projections projecting from an outer surface thereof. The projections are arranged in a longitudinal direction of the tube such that grooves are provided between the adjacent projections as external fluid passage portions. The tank has tube insertion portions defining openings into which ends of the tubes are inserted. Each of the tube insertion portions is configured such that a perimeter surface defining the opening thereof entirely covers at least one external fluid passage portion of the tube.

Abstract: A stacking-type, multi-flow, heat exchanger includes heat transfer tubes and fins, which are stacked alternately, an end plate disposed at an outermost position of the stacked heat transfer tubes and fins in a stacking direction, and inlet and outlet pipes connected to the end plate. The heat exchanger includes a pipe connection plate provided on the end plate, having a pipe insertion hole formed therethrough, into which at least one of the inlet and outlet pipes is inserted and which temporarily fixes an end portion of an inserted pipe in the pipe insertion hole. The pipe connection plate and the entire heat exchanger may be formed with a reduced size and weight, and the brazing quality between the plate and the pipe may be improved.

Abstract: A cooler module includes a heat pipe, which has one end terminating in a heat absorbing section that has at least one pane closely attached to the CPU to absorb heat from the CPU and a relatively greater metal wall thickness than the metal wall thickness of the heat pipe, and a heat sink connected to the other end of the heat pipe for dissipating heat absorbed from the CPU by the heat absorbing section of the heat pipe. The invention also provides a heat pipe for use in such a cooler module.

Abstract: An integrated exhaust gas recirculation (EGR) cooler with dual coolant loops comprises an exhaust gas inlet and an exhaust gas outlet for recirculating exhaust gas. An exhaust gas flow path extends between the exhaust gas inlet and the exhaust gas outlet to direct recirculating exhaust gas from the exhaust gas inlet to the exhaust gas outlet. A first coolant flow path extends between a first coolant inlet and a first coolant outlet to direct a first coolant flow from the EGR cooler in heat exchange relation with the exhaust gas flow path. A second coolant flow path extends between a second coolant inlet and a second coolant outlet to direct a second coolant flow through the EGR cooler in heat exchange relation with the exhaust gas flow path.

Abstract: A gas cooler includes paired header tanks, and a plurality of parallel flat tubes disposed between the header tanks. Each header tank is configured such that an outside plate, an inside plate, and an intermediate plate are brazed together in layers. When the height of each flat tube is represented by T (mm), the distance between each of the opposite longitudinal end surfaces of each flat tube and an outer surface of the corresponding intermediate plate is represented by L (mm), and the width of each communication hole of the intermediate plate is represented by W (mm), relations L?0.7 T and 1.1 T?W?2.5 T are satisfied. This gas cooler can minimize an increase in pressure loss when supercritical refrigerant flows from the flat tubes into first refrigerant flow sections of the outside plate and flows from the first refrigerant flow sections into the flat tubes.

Abstract: A connection between an uncooled pipe and a cooled double-wall pipe with between the walls a hollow space run through by cooling fluid let into the hollow space and taken from the hollow space through side passages connected to cooling fluid inlet and outlet ducts and including a connection zone with longitudinal cross section generally in fork form to have single tubular end connected to the uncooled pipe and an opposite double-wall tubular end to which are connected the corresponding walls of the cooled double-wall pipe so that the fork bottom constitutes a terminal closing of the hollow space and a side passage is made opposite the connection and a portion thereof nearest the uncooled pipe is almost at the height of the fork bottom. A double-pipe heat exchanger includes such a connection.

Abstract: The invention relates to a component (20) for supporting a tubular filter member (15) in a portable channel (2) in a plate heat exchanger (1). The invention also relates to a device including the component (20) and the filter member (15). Furthermore, the invention relates to a plate heat exchanger (1), which includes a package of heat transfer plates (3) provided between a first plate (5) and a second plate (6). The filter member (15) has an inner surface and an outer surface. The component (20) includes a first part (21), which is arranged to be introduceable into the filter member (15) to abutment against the inner surface of the filter member, and a second part (22), which is arranged to abut a surface area of one of said first and second plates (5, 6), which surface area extends around the porthole channel (2).

Abstract: A heat exchanger having tubes and at least one collecting tube is used, especially for air conditioning units of motor vehicles. The heat exchanger has pipes, at least one manifold that communicates with the pipes, and at least one connection flange. The connection flange is connected in a communicating manner to the manifold via a nozzle and can be connected to a conduit.

Abstract: A secondary heat exchanger subassembly, such as a transmission oil cooler, is disposed in a metal tank of a radiator and has a pair of metal fluid fittings. Either a connector ring engages a fitting extending through the opening in the tank or a connector nut extends into the opening to threadedly engage the fitting whereby the metal fittings are held to the metal tank and inserted into a furnace for being brazed into sealed relationship with the metal tank.

Abstract: A monolithic refractory ceramic tube sheet for use in all-ceramic air-to-air indirect heat exchangers, the heat exchanger used in all temperature and all pressure applications. A method for forming the monolithic tube sheet includes casting a refractory ceramic in a mold, where portions of the mold comprise the housing of the heat exchanger. Precisely formed negatives are used to form through channels and vacancies within the tube sheet, which are precisely positioned within the mold allowing uniform and flush formation of openings which receive the ceramic tubes therein. The same mold is used to provide both tube sheets of a tube sheet pair allowing accurate alignment of tubes within the exchanger vessel resulting in ease of assembly and equal loading of tubes when in use.

Abstract: An improved modular heat exchanger suitable for automotive applications, and particularly radiators for heavy duty equipment, and methods for forming the modular heat exchanger. The modular heat exchanger construction incorporates a brazed core assembly composed of flat-type cooling tubes and sinusoidal centers. The ability to use a brazed core assembly within a modular heat exchanger construction promotes enhanced heat transfer efficiencies associated with the use of flat tubes and sinusoidal centers, as compared to mechanically-joined round tubes and fins. The required positional tolerances of the tubes for mating with the remainder of the heat exchanger are maintained within the brazed core assembly by eliminating core shrinkage attributable to the use of clad aluminum alloy components to construct the core assembly. In two embodiments, core shrinkage is physical suppressed through the use of an expandable brazing fixture or the inclusion of sub-headers in the brazed core assembly.

Abstract: The subject invention provides a heat exchanger assembly including a tank having a wall defining an aperture with a fitting secured thereto and a method of securing the fitting thereto. The fitting has a first end with an outer perimeter disposed exteriorly thereof and smaller than the aperture for inserting the first end of the fitting into the aperture. The fitting also has an internal tunnel extending along an axis thereto from the first end. A step of material is disposed in the tunnel at the first end, which is at least in part, radially and longitudinally displaced relative to the axis into contact with the wall to prevent rotational movement of the fitting in the aperture.

Abstract: A connecting method and structure is provided to reliably ensure the compressive strength of the joint between a heat transfer pipe and a capillary tube when connecting the capillary tube to the heat transfer pipe by direct brazing. In the connection structure between the heat transfer pipe and the capillary tube, a pinched part in which a pipe end part of the capillary tube is inserted and a brazing filler material pooling part for pooling on a pipe end face side of the pinched part the brazing filler material that flows into the pinched part are formed. When inserted into the pinched part, the capillary tube is brazed to the heat transfer pipe.

Abstract: A plate heat exchanger has two end plates, at least one of which is provided with a number of port openings (11) to allow inflow and outflow of a number of heat exchanging fluids, and a number of heat transfer plates located between the end plates. One of the end plates (1) has two individual segments (10) that are relatively displaceable in the plane of the end plate.

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 tubular heat exchanger fed with a first flow of a heat exchange operating fluid at a respective predetermined inlet temperature, the fluid passing through the at least one tubular heat exchanger according to a respective inlet/outlet path, which method also provides the step of feeding into the at least one tubular 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 brazed heat exchanger (1) suitable for a motor vehicle comprises at least one manifold (3), to which at least one additional part (5) is fastened. The at least one additional part (5) has a fork-shaped profile piece (12), which is adapted to the circumference of the manifold (3), lies against the circumference of the manifold (3) and can be fixed thereto by a form locking and/or frictional connection, preferably prior to brazing.

Abstract: A stacking-type, multi-flow, heat exchanger includes a plurality of heat transfer tubes and fins stacked alternately, and a pair of tanks provided at either end of the heat transfer tubes. One of the tanks has an inlet tank portion and an outlet tank portion for the introduction and the discharge of a heat exchange medium to the heat exchanger. The heat exchanger has a flange member connected to the one of the tanks, the flange member has a flange body, an inlet pipe communicating with the inlet tank portion and an outlet pipe communicating with the outlet tank portion, and at least one of the inlet and outlet pipes is formed separately from the flange body. A passage for introducing heat exchange medium from the inlet pipe to the inlet tank portion and a passage for discharging heat exchange medium from the outlet tank portion to the outlet pipe are arranged in a thickness direction of the heat exchanger in parallel to each other.

Abstract: The invention relates to a heat exchanger, in particular a charge-air cooler for a motor vehicle.

Abstract: A plate-tube type heat exchanger not requiring maintenance is described, comprising: a plate with a plurality of channels running parallel along thereof; and, a plurality of tubes housed and secured to said channels, thus forming a circuit for the circulation of a heating fluid, a cooling fluid or a means of heating; the plate includes integrally attachment means associated to each channel, which in their closed position, cover along with its corresponding channel, almost the entire tube external perimeter housing in said channel, thereby securing each of the tubes to the whole plate, without the use of welding and a large contact surface is achieved for the heat conduction between the plate and each one of the tubes.

Abstract: A tank to header attachment construction for heat exchangers include T-shaped tabs on the header which extend through slots in a flange on a tank. The top bar of each tab has it ends bent out of alignment with the slot to secure the tank to the header.

Abstract: A heat exchange reactor including a housing, a plurality of tubes mounted in the housing and configured to carry a first fluid, and a baffle having a plurality of holes receiving the tubes. The baffle is configured to guide a second fluid provided within the housing to flow in a direction generally perpendicular to the tubes. The reactor includes various configurations for minimizing adverse effects of thermal expansion of the baffle and the tubes. The reactor is configured to minimize mechanical interference between the baffle and the tubes in both an operational state and a non-operational state, for example, by shaping the holes in the baffle to take into account thermal expansion. The reactor also includes a thermal insulator along a length of the tubes at a large temperature gradient zone within the reactor. The reactor further includes a heat transfer fin in contact with only one of the tubes.

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 jumper tube assembly for a heat exchanger includes a first connector block having an attachment portion engaged to the heat exchanger, an outlet and an inlet for receiving refrigerant from the heat exchanger. A second connector block includes an attachment portion engaged to the heat exchanger, an inlet and an outlet. A jumper tube extends between the first and the second connector block. The jumper tube includes an inlet connected to the outlet of the first connector block and an outlet connected to the inlet of the second connector block. The jumper tube inlet and the jumper tube outlet are brazed to the respective first and second connector blocks. The first and second connector blocks are brazed to the heat exchanger.

Abstract: A heat exchanger includes a plurality of tubes, a pair of header pipes, partition walls, an inlet connector block and an outlet connector block. The plurality of tubes have one ends connected to one header pipe and other ends connected to the other header pipe. The header pipe internally has a pipe-inside flow-through bore. The partition wall is internally formed in each header pipe to divide the pipe-inside flow-through bore into two regions. Each header pipe has a block connector bore opening at an outer side wall opposing to an area to which the tubes are connected and opening to the pipe-inside flow-though bore by cutting out a portion of the partition wall. The inlet connector block is connected to the block connector bore of one header pipe to admit coolant to flow in. The outlet connector block is connected to the block connector bore of the other header pipe to permit coolant to flow out.

Abstract: The invention relates to a method and apparatus for enhancing the heat transfer efficiency of a keel cooler by increasing the flow rate of coolant through the side tubes. Because the side tubes are exposed to a greater amount of fresh unhindered seawater, increasing the flow rate through the side tubes can have the effect of enhancing the overall heat transfer capability of the keel cooler. The invention relates to using apertures leading to the side tubes from the header and vice versa that are substantially arrow-shaped in design, wherein various benefits that lead to an increased flow rate are provided. The aperture is preferably symmetrically shaped so that a single die can be used to cut the aperture onto both side walls of the header.

Abstract: A heat exchanger, comprising a shell designed as a pressure vessel, provided with shell-sided supply and discharge means with which the shell can be flowed through with a first medium under pressure. The heat exchanger further comprises a nest of tubes extending at least partly within the shell, provided with tube-sided supply and discharge means with which the tubes from the nest can be flowed through with a second medium in heat exchanging contact with the first medium under pressure. The individual tubes of the nest are each included with a supply and a discharge side in tube bores extending substantially transversely to the plane of a tube plate included in the shell. The heat exchanger has the special feature that the tubes are connected with the tube-sided supply and discharge means via connecting channels located in the plane of the tube plate and crossing the tube holes.

Abstract: A heat exchanger includes a header pipe, an inlet manifold, an outlet manifold, and coupling members. The header pipe includes a fluid circulation hole inside. The inlet manifold supplies a fluid to the fluid circulation hole of the header pipe. The outlet manifold discharges the fluid from the fluid circulation hole of the header pipe. The header pipe is connected to the inlet manifold and the outlet manifold though the coupling members.

Abstract: A heat exchange assembly adapted for use in a water tank is provided. The heat exchange assembly includes a tube having end portions and a coiled portion between the end portions. A fitting is connected to at least one of the end portions of the tube. The fitting has an end configured to extend through an opening in the water tank, and a surface positioned to limit the extension of the end through the opening in the water tank. The fitting also has an opposite end defining a bore configured to receive one of the end portions of the tube and to limit the extension of the end portion of the tube into the opposite end of the fitting. The bore extends axially beyond the surface of the fitting.

Abstract: A housing-less plate heat exchanger is provided for transferring heat between at least a first fluid and a second fluid. The heat exchanger includes a plurality of heat exchange plates stacked to enclose flow channels for the first and second fluids between the plates, a first intermediate plate pair sandwiched between a first and second stack of the heat exchange plates, and a barrier located between the plates of the intermediate plate pair to separate the first fluid from the second fluid. The intermediate plate pair includes a first fluid port extending laterally from the heat exchanger to transfer the first fluid between the heat exchanger and a device other than the heat exchanger. The intermediate plates are joined to enclose a first chamber, with the first chamber opening to the first fluid port and to a manifold for the first fluid to direct the first fluid between the first fluid port and the manifold.

Abstract: The present invention relates to a condenser for radiating heat of a high temperature and high pressure refrigerant discharged from a compressor to room temperature air and cooling water to condense and liquefy the refrigerant, and more particularly, to a condenser provided with a condensing tube and a cooling plate for helping heat radiation of the condensing tube, the condensing tube and the cooling plate being provided in various structures, thereby improving a condensation efficiency. The condenser includes: a condensing tube 10 including a refrigerant inlet 12 formed at one end thereof, a refrigerant outlet 14 formed at the other end thereof, and a passage pipe 16 having a heat radiation protrusion formed on an outer circumference thereof; and a cooling plate having a groove 22 on which the condensing tube is mounted so as to prevent a separation of the condensing tube, and a plurality of bent pieces 24 formed protruding from left and right sides of the groove 22.

Abstract: A pipe connecting member 7 has a fluid outlet passage 7B formed in communication with a fluid outlet pipe socket 721 provided thereon at a position on a lateral extension of the fluid outlet hole 9b, and a fluid inlet passage 7A formed with a fluid inlet pipe socket 722 provided thereon as displaced from a position on a lateral extension of the fluid inlet hole 7a. A corner portion 95 having a curved surface is formed between the fluid inlet passage 7A and a front header 4.

Abstract: An apparatus for brazing a heat exchanger, in particular a flat-tube heat exchanger, comprising a block of flat tubes and corrugated fins. The apparatus comprises a brazing frame that accommodates a tube-fin block within itself and which has two brazing bars arranged parallel to each other which are connected by tie rods. The brazing bars have a plurality of openings that are open toward one side, e.g., notches.

Abstract: A fluid connector for providing an inlet/outlet connection to a connecting grid of a heat exchanger is disclosed in which the connector has a tubular body formed with an integral outwardly directed flange by means of which a fluid tight connection to the connecting grid can be achieved. The flange may be sealed relative to an aperture in a plate of the connecting grid. Alternatively, the aperture may be provided with a structural ring and the flange sealed relative to the structural ring for adapting the aperture to the size and/or position of the flange. A set of structural rings may be provided for use of the connecting grid with different connectors. The structural ring may allow the connector to be detached without disassembling the connecting grid. The aperture may be closed by a blanking disc.

Abstract: A heat exchanger comprising a heat exchange core (1) including a plurality of tubes (2) flowing a medium for heat exchange and a pair of tanks (4) to which ends of said tubes are connected, each tube formed by shaping a plate member (200) not clad with a row laminated brazing material and having a sacrifice layer (210) on an outer surface thereof and a plurality of recessed portions (203) formed on an outer surface of said sacrifice layer and filled with a brazing material (R).

Abstract: A heat exchanger construction (10) including a plurality of flat heat exchanger tubes (12) and a tube plate (18). The tube plate (18) has an exterior side (20), an interior side (22), and a plurality of tube openings (24) spaced along a longitudinal axis (26). Each of the tubes (12) includes a pair of opposed long sides (29) and a pair of opposed short sides (30). Each of the tubes (12) has an end (34) received in one of the tube openings (24) and extending past the interior side (22). Each of the ends (34) includes a pair of long edges (36) defined by the long sides (28). Each of the tubes (12) has a cut (38) in each of its short sides (30) extending from the end (34) to adjacent the interior side (22) of the tube plate (18). Each of the tubes further includes a bend (40) formed in each of the long sides (28) of the tube (12) adjacent the cut (38) so that the long edges (36) of the tube (12) are adjacent the long edges (36) of the tube (12) on either side of the tube (12).

Abstract: A heat exchanger design is described which includes header plates, apertures, seals and flow tubes. A plurality of apertures in at least one header plate are configured to allow a flow tube to be inserted into or removed from the aperture as a whole at an angle. A seal is included within the aperture and is supported by differing diameters of the aperture wall. The seal engages the flow tube in a manner to allow high pressure operation of the heat exchanger when the flow tube is perpendicular to the header plate.

Abstract: The heat exchanger has a plurality of stacked individual boxes for defining locally an inlet chamber and an outlet chamber for fluid. The heat exchanger includes an insert that comprises an inlet and outlet opening for fluid extended into the chambers by a body arranged for fluid communication of the opening with the first or second chamber. The insert that comprises a common part the body of which is provided with at least two openings capable of communicating with the first and second chambers, and it comprises a separating member for isolating the fluid currents between the opening and the chamber with which the opening must not communicate, the separating member being selected between two different shapes each corresponding to the fluid communication of the opening with one of the chambers.

Abstract: Disclosed herein is a fan cylinder for a cooling tower, which is configured to prevent the air discharged from the cooling tower from flowing back thereinto. The fan cylinder is fixed to the upper side of the cooling tower, and is configured to mount a cooling fan therein. The fan cylinder comprises a linear portion having a constant inner diameter, and mounted therein with the cooling fan; an inlet portion connected at an upper end thereof to a lower end of the linear portion, and having an inner diameter increasing downwardly; an extension portion connected at a lower end thereof to an upper end of the linear portion; and having an inner diameter increasing upwardly, and an outlet portion connected to an upper end of the extension portion, and having an inner diameter decreasing upwardly.

Abstract: A heat exchanger with a plurality of stacked plates between a cover plate and a base plate. Channels are defined between the plates, with each plate including four openings defining four passages through the stacked plates, two passages being input and output passages for one fluid and the other two passages being input and output passages for a second fluid, where the two fluids flow between their input and output passages through alternating defined channels. A reinforcing body is disposed in at least one of the passages through the stacked plates, and is secured to the cover plate and the base plate and spaced from the sides of the openings defining the at least one passage in the stacked plates between the cover and base plates.

Abstract: A heat exchanger is used in a vapor-compression type refrigerator where a pressure of a refrigerant at a high-pressure portion reaches and exceeds a critical pressure. A low-pressure refrigerant flows through the heat exchanger. The heat exchanger comprises a flat tube; refrigerant channels included in the tube; and inner pillars disposed between the refrigerant channels. A tensile strength of material of the tube is defined as S [N/mm2]; of one of the refrigerant channels, a dimension approximately parallel with a major-axis direction of the tube, as Wp [mm]; and, of one of the pillars, a thickness approximately parallel with the major-axis direction of the tube, as Ti [mm]. Here, [447×Wp/{10^(1.54×log10S)}?533/{10^(1.98×log10S)}]?Ti?[447×Wp/{10^(1.54×log10S)}?533/{10^(1.98×log10S)}]×2.3.

Abstract: The present invention relates to the structure of a pipe plate unit for heat exchangers which may be employed in condensers, etc. that is used in thermoelectric and nuclear power plants. The object of this invention is to provide a structure for heat exchanger pipe plate units which reduces the number of construction steps and the labor costs for replacement of the pipe plate units, and which results in a pipe plate unit for heat exchangers after the replacement process that maintains a good seal for the fluids and which is adequately strong.

Abstract: An aluminum heat exchanger is provided. In one embodiment, the aluminum heat exchanger comprises a fin having a first aperture therethrough with a flange formed around the first aperture. The fin is made from a first alloy having a first melting point. The heat exchanger includes a refrigerant tube made from a second alloy having a second melting point. The refrigerant tube extends through the first aperture. The heat exchanger also has a tubular coupling made from a third alloy having a third melting point and that is coupled to an end of the refrigerant tube. A fourth alloy having a fourth melting point less than the first, second, and third melting points is interposed the refrigerant tube and the flange, and further interposed the refrigerant tube and the tubular coupling. A method of manufacturing and a refrigeration unit are also provided.