Abstract: A heat exchanger unit comprises a plurality of heat exchangers of a construction in which a number of tubes are mounted on mounting plates, which additionally serve as manifolds, in a manner such that the tubes maintained in spaced relation while being twisted such that their axes conform to parts of helices.

Abstract: The thermal fuse valve (10, 110) is disposed within a passage (14, 114) of the wheel rim (12, 112). The thermal fuse valve (10, 110) includes a retention mechanism (22, 122) which engages a complementary-shaped retention mechanism (13, 113) of the passage (14, 114) such that the thermal fuse valve (10, 110) is disposed stationary relative to the passage (14, 114). The thermal fuse valve (10, 110) comprises a fuse body (20, 120) joined with a sealing fuse plug (30, 130) by way of a fusible material (40, 140). The fuse body (20, 120) includes a central opening (24, 24A, 124) receiving an axial extension (34, 134) of said sealing plug (10, 110). A seal (50, 150) is disposed about the perimeter of the sealing fuse plug (30, 130) in order to retain pressurized fluid within the tire, the pressurized fluid communicating with the central opening (24, 24A, 124) and acting upon the extension ( 34, 134) of the sealing fuse plug (30, 130).

Abstract: The present invention refers to a plate heat exchanger comprising a package of heat exchange plates (2), each having a peripheral portion (17) and with this a heat exchanger portion (9) and several port portions with through-flow ports forming inlet and outlet channels through the package. Said heat exchange plates (2) are permanently joined to each other along their peripheral portions (17) and at a variety of places in their heat exchange portions (9) in such manner that they leave flow passages between adjacent heat exchange plates (2), and between an outer line (13) and an inner line (14) located closer to the inlet and outlet channel, respectively.

Abstract: A heat exchanger includes a cylindrical main body formed by extrusion molding having a first connection with a first inlet for cooling water and a first outlet for high temperature fluid and connected to one end of the main body and a second connection with a second inlet for the high temperature fluid and a second outlet for the cooling water. A cooling water passage is provided in the cylindrical main body and extends axially thereof. The cooling water passage is connected to the first inlet and the second outlet for the cooling water. The heat exchanger also includes a high temperature fluid passage in the main body extending along with the cooling water passage. The high temperature fluid passage is connected to the first outlet and the second inlet for the high temperature fluid and fins are connected to the high temperature fluid passage for heat exchanging.

Abstract: A heat exchanger having two mainfold ducts extending in parallel, adjacent relation connected to each other by heat exchange tubes. The manifold ducts are formed by a plurality of duct segments axially aligned one after the other in sealed relation and a support frame is arranged externally of the manifold ducts and is secured to and supports the duct segments individually at one of their ends. Each duct segment is secured to the frame at one of its ends while its other end is guidably supported and allowed to axially expand and contract relative to the end of the adjacent duct segment. This provides favorable resistance to the loads developed during operation as well as simple dismantling of the heat exchanger.

Abstract: In order to carry out interventions, particularly for inspection and maintenance purposes, within heat exchangers, such as the steam generators equipping nuclear power stations, a device is proposed, which has an articulated arm formed from at least two rigid segments (24a, 24b), which are articulated to one another about an axis (A), as well as two plates (30a, 30b) mounted at the ends of the articulated arm via two handles (28a, 28b), each authorizing two rotations about two orthogonal axes (B, C), whereof one (B) is parallel to axis (A) and the other (C) is perpendicular to the surface (31a, 31b) of the corresponding plate. Each plate (30a, 30b) carries fastening members (32) able to engage in perforations (20a) of a tube plate (12) of the exchanger, as well as a support (34) for an intervention tool.

Abstract: A heat sink element, preferably one formed with a relatively large surface area from which thermal energy can be transferred convectively and radiatively to an ambient atmosphere, with or without forced fluid flow, is held forcibly in contact with a heat transmitting surface of a heat source for thermal conduction of heat therefrom. A heat sink attachment element affixed to the heat sink element has flexibly attached castellated extensions formed with tapered end teeth contacting a correspondingly inclined surface of the heat source. The castellated extensions are each subjected to a continual externally applied force and the total resultant force thereof, holding the heat sink element to the heat source, thereby can be maintained or will increase as the assembly experiences thermal cycling and mechanical disturbances during use. The effectiveness of thermally conductive contact between the heat sink and heat source therefore does not deteriorate during prolonged use.

Abstract: A composite heat exchanger tube includes a turbulence promoting liner and an outer tube telescoped about the liner and joined thereto. A method for fabricating a composite tube for a heat exchanger includes the steps of feeding tube stock and liner stock into a tube mill, superimposing liner stock upon the tube stock and simultaneously forming the tube stock into an outer tube while forming the liner stock into a lining within the tube. The tube is then welded or brazed longitudinally and the liner is brazed to the outer tube.

Abstract: The present invention is an improved serpentine heat exchanger. Two metal sheets are crimped together, sealed at their abutting edges. The sheets have matching depressions which from a serpentine air passageway. Within the passageway are elongated ribs and column like dimples which serve as obstruction to the air flow, directing fluid flow over under-utilized portions of the passageway and generating turbulent fluid flow near heat transfer surfaces.

Abstract: A heat exchanger including a first and second header is disclosed. The headers are linked in fluid communication by a plurality of elongated fluid tubes. In a first embodiment, the first and second headers are integrally formed as a single pipe having a partition wall extending radially across. Left and right intermediate headers are disposed laterally of the single pipe. Two groups of fluid tubes link the first header to a lower portion of the intermediate headers, and two additional groups of fluid tubes link the intermediate headers to an upper portion of the second header. In a second embodiment, the first and second headers are disposed in a spaced parallel arrangement and are approximately half the length of the left and right intermediate headers with which they are linked at an upper portion of the intermediate headers by fluid tubes. The lower parts of the intermediate headers are linked directly by a third group of tubes to complete the fluid circuit of the heat exchanger.

Abstract: A wall (100) serves to separate two rooms (200,300) at different temperatures and has a plurality of essentially parallel tubular sections (11) which conduct a fluid medium, said sections being enclosed between two plate-like parts (2,3) and connected in a heat-conducting manner to at least one of the said parts. The two plate-like parts (2,3) are rigidly interconnected along an interface (50) essentially parallel to the two principal directions of the wall (100). The interface (50) is arranged so as to lie outside the external contour of the tubular sections 11). The plate-like part (3) containing the tubular sections faces the room (300) at the higher temperature.

Abstract: In a series of heat exchange plates (5, 6), each being rectangular with ports (7, 8, 9, 10) in its corner portions, alternate plates (6) are fully sealed and coact with intermediate plates (5) to define two groups of elongated passages through which the respective heat exchanging fluids (A, B) flow. Each intermediate plate (5) is only partially sealed and defines with one of the two adjacent fully-sealed plates (6) an area communicating directly with the atmosphere, the partial sealing consisting of port sealing means (7a, 8a, 9a, 10a) interconnecting respective pairs of opposing ports to form channels through which the two fluids (A, B) flow without entering said area. The areas form paths through which any leakage of either fluid (A, B) can escape to the atmosphere, thus preventing contamination of either fluid by the other.

Abstract: A heat exchanger having manifolds in essentially parallel arrangement and having a special-section tube matrix which is arranged in a housing to project into a hot gas stream carried in the housing, the tube matrix being subdivided into sections and containing U-shaped reversal zones, where compressed air to be heated is admitted into the matrix via one manifold, is reversed in its direction and fed to the other manifold. The matrix sections are divided by transverse baffle walls. The ends of transverse supports extending around the tube matrix and the manifolds are connected to the housing in the vicinity of the U-shaped reversal zones, and the manifolds are supported in the housing for axial movement at both ends and are mounted rigidly on one support and axially movably on at least one further support.

Abstract: A plug member adapted for insertion into a tube end seals about its periphery in response to a predetermined activation to prevent fluid flow through the tube. In one embodiment, the plug contains annular rings that expand radially outwardly in response to thermal excitation. In an alternate embodiment, a welding material is forced about the plug periphery to seal with the interior surface of a tube in response to a predetermined activation.

Abstract: Gas-condensation device consisting of an enclosure (3a) and chambers (1,2) for collecting the cooling fluid, the enclosure (3a) containing gases which are at least partially condensable and at least one bundle (3) of horizontal smooth tubes inside which the cooling fluid runs and which are arranged regularly in a bundle and supported by intermediate support plates and/or support grids (3b) situated between the collecting chambers, characterized by the replacement of at least part of an oblique descending row of tubes (3) by shaped elements (20) for catching and removing the condensates and which are each offset in a same direction relative to the upper neighboring element.

Abstract: A laminated evaporator includes a plurality of heat exchanging elements and a plurality of corrugated fins disposed alternately and built up into layers. Each of the heat exchanging elements includes at least at its one end a pair of tubular portions and a plurality of spacers. The tubular portions of one heat exchanging element are fitted with the tubular portions of an adjacent heat exchanging element, and spacers of two adjacent heat exchanging elements are joined together to maintain a constant spacing between the adjacent heat exchanging elements.

Abstract: A shell-and-tube heat exchanger with a tube sheet having false partition grooves which allows the periodic rotation of a removable heat exchanger tube bundle, as well as a method of performing such rotation.

Abstract: A flexible liquid ribbon cooler for use with electronic components which includes a plurality of elongate thermo-conductive members, which are circular in cross-section, and which are positioned side by side. A bottom and a top layer of thermo-conductive material enclose the bottom and tops of the elongate members and form a plurality of liquid coolant passageways between the elongate members within the layers. The elongate members may be solid cylinders or tubes. A plurality of microcapillaries may be formed in the bottom layer to provide additional thermocoupling, adhesion, and detachability.

Abstract: A stator row is disposed between a propeller fan and a heat exchanger coil, such as the outdoor or condenser coil of a packaged terminal air conditioning unit. The stator row is situated against the heat exchanger coil on the fan facing side. The stator row has a frame that substantially matches the periphery of the coil, a ring disposed coaxially with the hub of the propeller fan, and a suitable number of radial stator vanes that extend from the ring to the frame.

Abstract: The air ducts of a heat exchanger are formed of a plurality of duct sections arranged axially one after the other and are clamped together in sealed relation by tension bars arranged symmetrically at the inner surface of the duct sections. The tension bars conform in shape to that of the duct sections to abut thereagainst.