Abstract: A heat exchanger assembly includes a pair of outer headers each defining an outer cavity and a pair of inner headers each defining an inner cavity. Each inner header is disposed in one of the outer headers, and each header defines a plurality of header slots. A plurality of first fluid tubes extend between the outer headers from one of the header slots of each outer header to fluidly interconnect the outer cavities defined by the outer headers and a plurality of second fluid tubes are interleaved with the first refrigerant tubes and extend between the outer headers and through one of the header slots of each outer header and through the associated outer cavities defined by the outer headers and to the one of the header slots of each inner header to fluidly interconnect the inner cavities defined by the inner headers.

Abstract: Disclosed is a device for exchanging heat, especially for cooling the combustion air of internal combustion engines in motor vehicles, which is characterized by the fact that the flow devices (14) are accommodated in an profiled housing (6) comprising at least two parts. The cross section of a first housing part (6a) is essentially U-shaped, said basic shape being closed at the open end of the first housing part (6a) by means of a second, substantially planar housing part (6b). The inventive device is further characterized by the fact that the housing (6) comprises at least one inlet flange and at least one outlet flange for the second medium at two opposite sides while the flow devices (14) are kept at a distance from each other in at least one area by means of at least one frame device (12) which is accommodated within the housing (6).

Abstract: The invention involves a straight tube heat exchanger 1 with a shell 2, a tube bundle 3 (for the sake of clarity, only two tubes of the tube bundle 3 are shown), two opposite manifolds 4a, 4b, means for introducing and discharging 5a, 5b the first medium into and from the tube space, and means for introducing and discharging the second medium into and from the shell space 6a, 6b, as well as a single-pass expansion joint 7, as it is used, for example, as a preheater in synthesis gas production unit. Both the shell 2 and the two manifolds 4a, 4b are made from heat-resistant, creep-resistant steel, especially a chromium-molybdenum alloy. The expansion joint 7 are made from chromium-nickel steel just like the two welding-ring seals 8. By the expansion joint being made from chromium-nickel steel, the different mechanical stresses are completely absorbed by the high temperature.

Abstract: Previous heat transmission units have only low cooling efficiencies in case of small fluid mass flows. According to the invention, it is proposed to configure a heat transmission unit (1) in such a manner that a channel (4) conducting the fluid to be cooled is separated, by a partition wall (14;23,24;29,30), into at least two separated partial channels (15,16), a first one of these channels being adapted to be shut off by a shut-off means (21;27;31) arranged at a first partial fluid inlet (17) of this channel. Preferably, in spite of the closed condition of this inlet cross section, full use is made of the existing cooler surface in that there is effected, by suitable arrangement of the partition walls (14;23,24;29, 30) and by further shut-off means (28;32), a deflection of the fluid mass flow in the heat transmission unit (1).

Abstract: An evaporative heat exchanger for cooling a hot refrigerant having a core of alternatively stacked dry and wet plates. Each dry plate includes a dry side defining a plurality of dry channels in a first direction, a series of ports distributed along the dry channels, a wet side, and a refrigerant cooling section. Each wet plate includes a wet side adjacent to and cooperates with the wet side of the dry plate to define a plurality of wet channels in a second direction. The dry channels, ports, and wet channels define a labyrinth for the air flow, which evaporates the liquid contained in the wet channels resulting in a cooling of the refrigerant. The refrigerant cooling section is integral with the outboard of the dry plate and adjacent to an end section of the wet channels to provide enhanced refrigerant cooling.

Abstract: The matrix arrangement for use in heat transfer and/or cleaning assemblies comprises a sheet, the sheet defining a plurality of apertures for the flow of a first fluid therethrough. The arrangement is arranged for the flow of a second fluid over the sheet, so that the first and second fluids cross one another for heat transfer and/or cleaning.

Abstract: An instantaneous heat exchanger for heating sanitary water in a combined boiler has a casing defining a chamber for a first fluid, within which there extends a conduit or tubing for a second fluid. At least one of the chamber and the conduit has a substantial capacity of containment of the respective fluid, preferably between three and six litres, and the heat exchanger is pre-arranged for hydraulic connection to a standardized connection assembly for an ordinary plate-type heat exchanger for a combined boiler.

Abstract: Heat exchange apparatuses configured for various applications so as to transfer heat to or from a fluid to be heated or cooled, respectively. The heat exchange apparatus includes at least one fluid line for containing the product fluid to be heated or cooled. The line includes an inlet into which the fluid is introduced, as well as an outlet at an opposite end of the line through which the fluid exits. The heat exchange apparatus also advantageously includes a cast metallic body which encases at least a portion of the fluid tube.

Abstract: The invention relates to a heat exchanger for a motor vehicle, comprising a first flow path (1), a deflection region (13) located downstream of the first flow path (1) and a second flow path (2) that is located downstream of the deflection region (13). The first and second flow paths (1, 2) can be traversed by a fluid to be cooled and can be surrounded by a coolant to dissipate heat. The second flow path (2) has a flow resistance that differs from that of the first flow path (1).

Abstract: Ceramic materials that are highly resistant to strong acids such as concentrated sulfuric acid and halides such as hydrogen iodide are employed to make block elements through which a large number of circular ingress channels extend in perpendicular directions and which are joined and piled in the heat exchanging medium section to provide a compact heat exchanger that excels not only in corrosion resistance but also in high-temperature strength.

Abstract: The present invention provides a heat exchanger for transferring heat between a first working fluid and a second working fluid. The heat exchanger can include a corrugated fin positionable along a flow path of the first working fluid between adjacent tube walls and being operable to increase heat transfer between the first working fluid and the second working fluid. The fin can include a leg defined between adjacent folds. The heat exchanger can also include a plurality of convolutions extending inwardly from a distal end of the leg and terminating at different distances from the end.

Abstract: A stacked catalytic reactor is provided comprising of a plurality of housings, each housing defining a cavity having an entrance in fluid communication therewith, each housing further defining a plurality of first passages wherein each such first passage is in fluid communication with the cavity and each such first passage defines an exit. The plurality of housings are placed adjacent one to the other such that a second cavity and second passages are defined between successive housings, each second passage defines an exit, and the first passage exits and the second passage exits are interstratified and proximate one to the other. The stacked catalytic reactor employs backside cooling of a catalyst deposited therein in order to oxidize a fluid in the presence of a catalyst and transfer some heat of reaction into a second fluid and isolate the fluid to be reacted from the backside cooling fluid and then combine both fluids.

Abstract: The invention relates to a multiple flow heat exchanger (1), especially a gas cooler, comprising at least two flows (2, 3) passable by a fluid (13) in opposite directions and which respectively comprise a group of parallel channels (4) provided with lamellae (5) positioned between the channels (4) in a sandwich-type manner. A deflecting pocket (6) is positioned on a first front side (1.1) of the heat exchanger (1), for reversing the direction of the fluid (13), and a fluid distributor (7) for a first flow (2) and a fluid collector (8) for a second flow (3) are arranged on a second opposing front side (1.2) of the heat exchanger (1). According to the invention, the adjacent channels (4.1), each with a different fluid temperature, for the adjacent flows (2, 3), are thermally decoupled from each other.

Abstract: A blade heat exchanger includes blades that extend axially with respect to an axis of rotation and are elongated in the radial direction. The blades are arranged about the axis such that, when they are disposed in a housing, they form composite condensation and evaporation chambers that are isolated from each other. The interiors of at least some of the blades form the composite condensation chamber. The exteriors of the blades and the inner surface of the housing cooperate to form the composite evaporation chamber.

Abstract: In a micro heat exchanger for the transfer of high area-specific amounts of heat from a heat source to a heat transfer medium, including a heat transfer structure with an inlet- and an outlet duct structure between which a plurality of passages extend through the heat transfer structure, the inlet and outlet duct structures are arranged in alternating order in the heat transfer area in close proximity to the heat source, with the inlet and outlet duct structure and the passages interconnecting the inlet and outlet structures covering the whole heat transfer area directly adjacent the heat source.

Abstract: Condensate accumulating in the incoming outside air flow passages of a heat exchanger is fed back into the exhaust flow passages of the heat exchanger to provide improved heat transfer in the heat exchanger, and to avoid the necessity for drainage of the condensate from the heat exchanger. The heat exchanger includes a plastic multi-tube panel core and a solid plastic housing, with opposed-flow heat exchange and inlet-outlet extensions from only one side of the core.

Abstract: In a heat exchanger used for an EGR cooler or the like, in order to provide a heat exchanger that has a small number of parts, is assembled easily, can flow cooling water evenly at each part, and does not cause partial boiling, a strip-shaped metal plate is turned up and bent in a fanfold manner, flat first flow channels 3 and second flow channels 4 are formed alternately, both the ends of the first flow channels 3 are closed with slit blocks 6, projecting stripes 3a are bent and formed at the positions of ports 11 for the cooling water 10 in proximity to the slit blocks 6, and gaps 3c are formed between respective paired projecting stripes 3a.

Abstract: The present invention is a water source heat pump using various modular components to determine and locate the air flow pattern through and around in multiple patterns as assembled post production in the heat pump system. The current invention uses conventional water source heat pump components, assembled in modules including a refrigerant system using a heat exchange medium existing in both the gaseous and liquid form during operation and includes all other necessary components for control, air movement, and commonly occurring processes as in conventional water source heat pumps. The current invention will use an industry standard geothermal or geoexchange source as with the earth as a heat source for heating and a heat sink for cooling in a commonly referred to as an “open loop” or “closed loop” fashion, or as a water source heat pump utilizing a mechanical means for heating or cooling a source liquid.

Abstract: In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions of each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each come tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And in the heat exchanger in which a cylindrical casing is fitted with the outer periphery of the core body, the comb-state member has its tooth base crossing perpendicularly with each of the comb tooth and a root of each comb tooth bent in the L-shape along the tooth base, the plane of the tooth base is brought into contact with a turned-up end edge, and each connection portion between the comb-state member and the core body is integrally brazed/fixed.

Abstract: The invention relates to a rolled heat exchanger comprising several pipes wound around a central pipe, a casing delimiting the external space around the pipes and a liquid distributor for distributing liquid in the external space. According to the invention, the liquid distributor is embodied in the form of a pipe manifold comprising a main channel (21) and several distributing arms (22) which are fluidically connected thereto.

Abstract: The invention relates to a heat exchanger in which a liquid coolant and a gaseous flow, for example compressed charge air, are involved in the exchange of heat, with at least two heat exchanger blocks being provided which can be traversed by the coolant and by the gaseous flow. The invention can include inventive solutions for a flat arrangement including at least one gas-side bypass arranged adjacent to or within the first heat exchanger block and/or adjacent to or within the second heat exchanger block. The present invention also provides a method for cooling that divides the gaseous flow into at least two partial flows. One partial flow can be guided past a heat exchanger block, and the other partial flow can be conducted through the other heat exchanger block before the partial flows are finally merged.

Abstract: A support device for supporting a plurality of elongated members. The support device having a longitudinally extensive strip having a plurality of sets of transverse corrugations located at successive longitudinal locations along the strip. Each set of transverse corrugations forming a plurality of elongated member engaging zones extending laterally outwards from both faces of the strip to engage the elongated members in the tube bundle on opposite sides of a tube lane. The support device is useful to support elongated members in a bundle and to mitigate the possibility of damage from flow-induced vibration in elongated members.

Abstract: The ventilating system includes evaporative cooling of the exhaust air before it enters a heat exchanger to cool incoming fresh outside air. A suction fan pulls exhaust air through the heat exchanger and, in combination with a flow restrictor, reduces the pressure on the exhaust air and augments the evaporative cooling. The use of a pusher fan to force outside air through the heat exchanger ensures that any leakage in the heat-exchanger results in outside air entering exhaust air and minimizing the chances of contamination by leaking exhaust air into the incoming fresh air. The heat exchanger is made economically by heat-forming cavities in relatively thick thermo-plastic sheets, interleaving them with other thermo-plastic sheets having separate gas flow conduit structures, and securing the sheets together. Preferably, the heat-exchanger is an opposed-flow heat-exchanger giving improved heat-transfer efficiency.

Abstract: Disclosed is a process for devolatilizing a polymer including passing the polymer through a devolatizer including a plate heat exchanger wherein the plates of the plate heat exchanger are heated by a plurality of heating tubes and wherein the heating tube including a return tube nested inside of a supply tube. The use of the disclosed invention allows for a comparatively small heat profile across heating plates as compared to prior art plate heat exchangers.

Abstract: A fixed pillar with heat loss is a fixed pillar for losing heat. The fixed pillar with heat loss includes a metal body, a screw thread and a plurality of grooves. The metal body is a hollow body. The plurality of grooves is respectively set on two sides of the metal body and communicating with each other. The screw thread is set on one end of the metal body to fix a circuit or other electric devices. Air flows into one side of the metal body and then passes through the inner part of the metal body and last flow out from another side of the metal body. Accordingly, the metal body exchanges heat with the air to lose the thermal energy quickly.

Abstract: A sheet for use in a heat exchange apparatus. The sheet includes a first vertical rib that extends in a first direction generally parallel to the vertical axis of the heat exchange apparatus, wherein said first vertical rib protrudes in a second direction out of the plane. The sheet also includes a second vertical rib that extends in the first direction along the sheet, substantially all the way between the first and second edges of the sheet generally parallel to the first vertical rib. The second vertical rib also protrudes in the second direction out of the plane. The sheet further includes a first horizontal rib that extends in a third direction along the sheet substantially all the way between the third and fourth edges of the sheet, wherein the first horizontal rib protrudes in a fourth direction opposite said second direction.

Abstract: A plate-fin heat exchanger having alternating layers for exchanging heat between fluids to be warmed against fluids to be cooled. One or both of the layers is subdivided into flow passages to allow for the flow of two or more fluids flowing through one of the layers to engage in indirect heat transfer with one or more fluids flowing through another adjacent layer. The flow through the heat exchanger is parallel to the width of the heat exchanger. The first and second layers provide a greater cross-sectional flow area for each of the fluids than otherwise would have been provided had the fluids flow been parallel to the length of the heat exchanger with layers thereof dedicated to the flow of each of the fluids.

Abstract: A heat exchanger is disclosed including a first tube, a second tube, a first inlet-connecting block, a first outlet-connecting block, a second inlet-connecting block, a second outlet-connecting block and a terminal connecting block. The first tube internally has a first flow passage through which first coolant flows. The second tube internally has a second flow passage through which second coolant flows. The first tube is connected to the first inlet-connecting block and the first outlet-connecting block. The second tube is classified into an inflow tube group and an outflow tube group. Tubes that belong to the inflow tube group are connected to the second inlet-connecting block and the terminal connecting block. Tubes that belong to the outflow tube group are connected to and the terminal connecting block and the second outlet-connecting block. The first and second tubes are disposed such that the first and second flow passages are substantially perpendicular to one another.

Abstract: An electronic device includes a housing, a spacing structure, a printed circuit board and a fan. The housing has first and second openings. The spacing structure is arranged within the housing for partitioning a space within the housing into an air channel and a receptacle. The air channel is in communication with the first and second openings. The printed circuit board is disposed within the receptacle. The fan is disposed within the air channel for inhaling ambient air via the first opening and exhausting the air via the second opening so as to dissipate heat outside the electronic device.

Abstract: A method with associated equipment for feeding two gases into and out of a multi-channel monolithic structure. The two gases will normally be gases with different chemical and/or physical properties. The first gas and the second gas are fed by means of a manifold head into channels for the first and second gases, respectively. The gases are distributed in the monolith in such a way that at least one of the channel walls is a shared or joint wall for both gases. The walls that are joint walls for the two gases will then constitute a contact area between the two gases that is available for mass and/or heat exchange. This means that the gases must be fed into channels that are spread over the entire cross-sectional area of the monolith. The entire contact area or all of the monolith's channel walls are directly used for heat and/or mass transfer between the gases. This means that the channel for one gas will always have the other gas on the other side of its channel walls.

Abstract: Element for heat exchanging between fluids, where the flowing canals for the fluids are formed of slits on either side of a thin, folded sheet material (1), and that the ratio between the slit width (24) of the canals and depths (25) in the slits is less than 0.15 times the thickness of the sheet material.

Abstract: A folding baking rack for supporting baking trays is disclosed having two opposing side assemblies joined together by at least one foldable cross-member assembly that allows the baking rack to be collapsible to require less space when not in use, and expandable to assume the form of a traditional baking rack for use. Each cross-member assembly comprises two link arms pivotally joining two C-arms, the C-arms being pivotally connected to each of the two opposing side assemblies such that the two opposing side assemblies are maintained in a parallel orientation with respect to each other throughout the range of motion of the foldable cross-member. In one embodiment of the invention, the C-arms and link arms are spring biased providing an over-center force that both maintains the folding baking rack in a collapsed state, and provides an opening force once the folding baking rack is opened beyond a half-way open position.

Abstract: A wick arrangement for an anesthetic evaporator includes a wick with a carrier material (2) that is essentially impermeable to gas provided with wick material (3, 4) on both sides. A great path length is provided for saturating the gas with anesthetic vapor in the smallest possible installation volume by providing flow channels such as helical flow channels (10, 11) extending helically on both sides of the wick. The gas flow is led in counterflow in the flow channels (10, 11) by a housing (9).

Abstract: A heat exchange assembly for a cooling system, having first and second cooling loops, includes a housing with a first coolant inlet and outlet and a second coolant inlet and outlet, respectively coupling to the first and second cooling loops, and multiple heat exchange elements. Each heat exchange element includes a first set and a second set of coolant flow passages intersecting different pairs of parallel face surfaces of the elements, with the second set of flow passages extending in a transverse direction to the first set of flow passages. The heat exchange elements are disposed within the housing with the first set of flow passages oriented in a first common direction in fluid communication with the first coolant inlet and outlet and the second set of flow passages oriented in a second common direction in fluid communication with the second coolant inlet and outlet of the housing.

Abstract: A stacked assembly of plates is provided, a first portion of the length of the assembly being formed of one or more first perforated plates, with a central open region enclosed by inner annulus and limbs from the outer diameter of the inner annulus to the inner diameter of an outer peripheral annulus, whereby the first plate has a central passageway for the first fluid inside the inner annulus and a plurality of outer frusto-annular passageways for the second fluid, and, at one end of the first portion, a second portion of the length of the assembly formed of one or more second perforated plates of similar construction to the first plates, each second plate differing from the first plate in that its outer peripheral annulus has one or more discontinuities to provide an inlet or an outlet into the outer frusto-annular passageways of the second portion.

Abstract: The heat exchanger plates have the section shown, with raised sections on the upper and lower faces in which run the flow pipes of one of the fluids. Notches are created on the longitudinal ends to allow these pipes to communicate, their supply and evacuation from a lateral face of the plate, whereas the other fluid enters and leaves via the longitudinal faces. The exchanger is therefore easier to make. The plates are manufactured by extrusions and only machined to create the notches.

Abstract: An improved method and apparatus for indirect evaporative cooling of a fluid stream to substantially its dew point temperature. Plate heat exchanger has perforations 11 and channels 3, 4 and 5 for gas or a low temperature for liquids on a dry side and wet side. Fluid streams 1 flow across the dry side 9, transferring heat to the plate. Gas stream 2 flows across the dry side and through perforations to channels 5 on wet side 10, which it then cools by evaporative cooling as well as conductive and radiative transfer of heat from plate. A wicking material provides wetting of wet side. In other embodiments, a desiccant wheel may be used to dehumidify the gas, air streams may be recirculated, feeder wicks 13 and a pump may be used to bring water from a water reservoir, and fans may be used to either force or induce a draft. The wicking material may be cellulose, organic fibers, organic based fibers, polyester, polypropylene, carbon-based fibers, silicon based fibers, fiberglass, or combinations of them.

Abstract: Ceramic materials that are highly resistant to strong acids such as concentrated sulfuric acid and halides such as hydrogen iodide are employed to make block elements through which a large number of circular ingress channels extend in perpendicular directions and which are joined and piled in the heat exchanging medium section to provide a compact heat exchanger that excels not only in corrosion resistance but also in high-temperature strength.

Abstract: An air-to-air heat exchanger, is provided that comprises a folded fin core formed from a continuous sheet of thermally conductive material that has been folded into alternating flat ridges and troughs; an insert overlay having an opening including two sets of uniform fingers, wherein each finger has a portion protruding into and essentially filling each trough on one surface of the folded fin core; an inset region between each finger portion and the end edges of each trough; a sealant within each inset region sealably attaching the insert overlay to the folded fin core; and an air flow divider plate. Heat exchanger components are also provided.

Abstract: A heat exchanger is formed of a strip of corrugated material that is folded back and forth upon itself to define a stack. Cut pieces of corrugated material are inserted within the folds of the strip, such that the corrugations of the cut pieces are generally perpendicular to the corrugations of the folded strip. A set of duct attachments holds the assembly together, and provides paths for fluid flowing into and out of the exchanger. The ends of the stack, and those parts of the sides that are not spanned by the duct attachments, are sealed with a high-temperature sealant. The sealant is preferably a moldable material that is applied and allowed to harden, and which has a coefficient of thermal expansion that approximates that of the stack. The heat exchanger is easy and inexpensive to manufacture, but is suitable for use in high-temperature applications.

Abstract: Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plates are sealed air-tightly. The end plates have a first passage inlet opening only to the first passage, a first passage outlet opening only to the first passage, a second passage inlet opening only to the second passage and a second passage outlet opening only to the second passage. Each of the inlets and outlets is open to every turn of the spiral passage. A first fluid entering the passage from the first passage inlet passes through the first passage for less than one turn only and is discharged from the first passage outlet. A second fluid entering the passage through the second passage inlet passes through the second passage for less than one turn only and is discharged from the second passage outlet.

Abstract: A liquid cooling device includes a casing (10) having a container (14) for accommodating liquid therein, and a liquid inlet port (18) in communication with the container (14). A funnel-shaped channel is defined in the liquid inlet port (18), and radiuses of the funnel-shaped channel are descended along a liquid flow direction.

Abstract: A cooling tower having a heat exchanger. The heat exchanger includes at least one heat exchanger pack having a generally diamond shape. The heat exchanger pack includes a first set of passageways for receiving a stream of warm, water laden air and a second set of passageways for receiving ambient air. The first set of passageways and second set of passageways are separate. Cooling tower configurations including the heat exchanger pack are disclosed for achieving effluent plume abatement, and capture of a portion of the effluent for replacement back into the cooling tower reservoir or as a source of purified water.

Abstract: A heat exchange unit includes metallic heat transfer members combined with each other. Each heat transfer member has a heat transfer face having opposite surfaces with which first and second heat exchange fluids come into contact, respectively. Welded-together flat portions of the heat transfer members are inserted into a fitting hole of an end plate. The fitting hole substantially coincides with an end shape of the combined heat transfer members and is sized to slidably receive welded-together flat portions such that the end plate and the received, welded-together flat portions contact each other. After insertion, the heat transfer members are welded to the end plate along the fitting hole so that, at the welded region, the heat transfer members and the end plate form an integral construction.

Abstract: A heat exchanger includes a container having an outlet and an entrance coupled to an inlet and an exit, a receptacle having an entering port and a discharging port for circulating a fluid medium and having an entering opening and a discharging opening. A casing is disposed between the container and the receptacle and includes a passage coupled between the outlet of the container and the entering opening of the receptacle, to allow a heat medium to flow from the container into the receptacle, and a chamber communicating with the discharging opening of the receptacle and the entrance of the container. An air filtering device may be disposed in the casing for air filtering purposes, and for collecting and discharging water.

Abstract: A compact heat exchanger and/or fluid mixing means comprises a bonded stack of plates, the stack comprising at least one group of plates, the group comprising one or more perforated plates (10) sandwiched between a pair of primary separator plates (40, 62, 64), characterised in that each perforated plate (10) has perforations (14) arranged in rows across the plate in a first direction, with a land (16) between each adjacent pair of perforations (14) in a row and with ribs (18) between adjacent rows, the lands (16) forming barriers to flow in a first direction across the plate and the ribs (18) forming barriers to flow in a second direction across the plate, the second direction being normal to the first direction, the ribs (18) having vents (20) through a portion of their thickness, the vents (20) extending from one side of a rib (18) to the other side in the second direction, whereby flow channels are provided through the vents (20) and the flow channels lying between each adjacent pair of lands (16) provide

Abstract: The efficiency of a heat exchanger is significantly improved by forming walls in an air flow structure, which has first grooves formed in the top surface of the structure and second grooves formed in the bottom surface of the structure, that block off alternating ends of the first and second grooves such that a first air source can only flow through the first grooves and a second air source can only flow through the second grooves.

Abstract: The invention refers to a heat exchanger plate (4) for a plate heat exchanger (1), a plate package (3) and a plate exchanger (1). The plate (4) includes at least a first area (31) with a corrugation of ridges and valleys, the plurality of which extends in a first direction (A), and at least a second area (32) with a corrugation of ridges and valleys, the plurality of which extends in a second direction (B). The plate (4) has a central rotary axis extending in parallel with a normal line of the plate. The areas (31, 32) have a respective contour coinciding with a respective imaginary contour in a first rotary position of the plate with regard to the rotary axis and after a rotation 90° to a second rotary position of the plate with regard to the rotary axis.

Abstract: A heat transfer member for a heat exchanger, is press-formed of a metallic thin sheet material into a prescribed shape by means of molds of a press forming device so that the heat transfer member has on at least one portion thereof a heat transfer face having opposite surfaces, which are to be brought into contact with heat exchange fluids, respectively. The heat transfer face comprises at least one set of irregularity patterns arranged in a row.

Abstract: A heat exchanger (50) is provided for transferring heat between first and second fluids (52) and (54) having a maximum operating mass flow rate through the heat exchanger (50) and mass flow rates that are substantially proportional to each other. The heat exchanger (50) provides essentially constant outlet temperatures for the first and second fluids (52,54) for all of the flow rates within the operating spectrum of the heat exchanger (50) without the use of an active control system. The heat exchanger (50) is of particular use in the fuel processing system (36) of proton exchange membrane type fuel cell systems.