Abstract: Diffusion bonding techniques are extended to the simultaneous bonding of an array of multilevel piece parts. The problems of uneven expansion and contraction of different levels of different piece parts in the array are obviated by positioning each level of the array within a frame. The stack of frames is pinned in one corner. The opposite corner of the array has a slot at a 45° angle with respect to the x and y axes of the array. The slot engages a pin and allows the entire array to expand and contract along the slot in a manner to maintain the registration of features between respective levels of each piece part.

Abstract: A heat-exchanger unit (13) for recovering heat from the flue gases from a cylinder steam boiler (10), said heat exchanger unit comprising a flue-gas tube (14) and a heat-exchanging tube (16) which is supported concentrically inside the flue-gas tube (14) by a bent inlet pipe (19) extending from a lower opening (20) in the peripheral wall of the flue-gas tube (14) to an inlet opening (21) in a lower outwardly bulging end wall (22) of the heat-exchanging tube (16), and an outlet pipe (23) extending from an outlet opening (24) in an upper part of the peripheral wall of the heat-exchanging tube (16) to an upper opening (25) in the peripheral wall of the flue-gas tube (14). The inlet pipe (19) has a first, horizontal, straight end portion (19A), a second, upwardly directed, straight end portion (19B) and also an intermediate, curved portion (19C). The bending angle (.alpha.) of the curved portion exceeds 90.degree. and the other end portion (19B) extends with an inclination determined by said bending angle (.

Abstract: A workpiece chuck includes an upper assembly on which can be mounted a flat workpiece such as a semiconductor wafer. A lower assembly is mountable to a base that supports the chuck. A non-constraining attachment means such as vacuum, springs or resilient washers applied to the chuck holds the upper assembly to the lower assembly, the lower assembly to the base and can hold the wafer to the top surface of the upper assembly. A heater and a heat sink can be included in the bottom assembly to allow for temperature cycle testing of the wafer. By holding the chuck together by non-constraining means, the chuck layers can move continuously relative to each other under expansion forces caused by temperature effects. Mechanical stresses on the chuck and resulting deformation of the chuck and workpiece over temperature are substantially eliminated.

Abstract: A plate-type heat exchanger configuration which facilitates fluid flow along a generally "L" or "S" shaped path and which includes a plurality of heat exchanger plates with at least one of the edges comprised of a pair of edge sections which terminate in different edge configurations. The invention also relates to a plate configuration for such a heat exchanger.

Abstract: A thermal shunt comprising flexible graphite fibers for removing heat from components coupled thereto and providing mechanical isolation. The thermal shunt comprises a plurality of stacked layers of graphite fibers secured together at opposite ends to form rigid sections at the respective opposite ends that provide for thermal coupling. Portions of the graphite fibers between the rigid sections are flexible and provide mechanical isolation between components to which the thermal shunt is coupled.

Abstract: A workpiece chuck includes an upper assembly on which can be mounted a flat workpiece such as a semiconductor wafer. A lower assembly is mountable to a base that supports the chuck. A non-constraining attachment means such as vacuum, springs or resilient washers applied to the chuck holds the upper assembly to the lower assembly, the lower assembly to the base and can hold the wafer to the top surface of the upper assembly. By holding the chuck together by non-constraining means, the chuck layers can move continuously relative to each other under expansion forces caused by temperature effects, such that mechanical stresses on the chuck and resulting deformation of the chuck and workpiece over temperature are substantially eliminated. A plurality of support members including inclined surfaces provided between an upper and lower portion of the chuck maintain the top surface of the chuck and any workpiece mounted thereon at a constant height over temperature.

Abstract: A multi-tube heat exchanger includes a pair of tanks and a plurality of heat transfer tubes fluidly interconnected between the tanks, wherein each heat transfer tube has an engaging portion only at a first end portion engaging a wall of a first tank of the pair of tanks and a relatively movable portion at a second end portion capable of moving in an axial direction of the tube relative to a wall of the second tank. Such a structure helps ensure proper tube positioning and spacing while bowing or deformation of the heat transfer tubes is appropriately prevented at the time of heating and brazing.

Abstract: A heat exchanger has a container with an outer mantle and pipes positioned in the container for conveying a heat-receiving medium through the container. The heat-transferring medium flows exterior to the pipes in counter flow to the heat-receiving medium in the pipes. A common inlet tube is connected to the container and communicates with the pipes for introducing the heat-receiving medium. A common outlet tube is connected to the container and communicates with the pipes for removing the heat-receiving medium from the pipes. The pipes extend meander-shaped within the container. The common inlet tube penetrates the outer mantle on opposite sides and has an inflow end and a remote end. The inflow end is pressure-tightly connected to the outer mantle. The common outlet tube penetrates the outer mantle on opposite sides and has an outflow end and a remote end. The outflow end is pressure-tightly connected to the outer mantle.

Abstract: Carbon black is produced by burning a mixture of air and oil to produce hot gases and then conducting the hot gases through tubes extending through a chamber of a heat exchanger. Heat exchange air is conducted through the chamber in a direction opposite the direction of gas flow, in heat-exchange relationship with the tubes, to pre-heat the air. The pre-heated air is then mixed with the oil to be burned. Prior to entering the chamber, the air is conducted within a hollow section of the wall structure of the heat exchanger to transfer heat from a hot end of the wall structure toward a cooler end thereof.

Abstract: A heating device for corrugated cardboard comprises a heating member which is formed by a heating plate consisting of a rectangular plate having side walls, front and back walls integral with the plate and a lower or bottom surface of the plate is connected to a sheet of deformed steel having a small thickness to present cells or passages which are obtained by deformation. The front and back borders of the sheet of steel have been folded at 45.degree. angles so as to form a front chamber and a back chamber that act as manifolds for the flow of fluid in the passages. The heating member is connected in a floating manner to a rigid sub-frame by means of rods, and the whole sub-frame and member are also connected in a floating manner to the main frame of the machine that produces the corrugated cardboard.

Abstract: A fixing lug provided on a fluid chamber of the heat exchanger has an elongate opening along which there is able to slide a bolt ensuring the clamping of the lug on a receiving lug. This sliding enables the heat exchanger to expand without mechanical stress.

Abstract: A heat exchanger having corrosion resistant resin-coated plates and pipes. The heat exchanger is easily constructed using the corrosion resistant resin-coated plates and the pipes. The heat exchanger does not require heat treatments or large constructing sections. In the heat exchanger according to the present invention, a gas is supplied to the outside of pipes, and air and/or water are passed through the pipes. As a result, heat change is accomplished. A pipe plate and a side wall of the heat exchanger are coated with Teflon or a heat resistant resin. In the feed water pre-heater for heating water, pipes are formed as metal pipes coated with a resin for maintaining the strength of the pipes. Thereafter, the pipes are individually welded and fabricated. In the feed air pre-heater, the heat exchanger has side walls, a pipe plate and pipes. The side walls and the pipe plate have essentially the same structure. The pipes are made of resin. The pipe plate and pipes are united by a metal assembling member.

Abstract: A ceramic ferrule, an array of ceramic ferrules, and a ceramic ferrule refractory wall, all for shielding a tube sheet/boiler tube assembly of a heat exchanger connected to an industrial heat source. The head portion of each ferrule replaces conventional cast refractory walls, and has an outer-peripheral shape that allows the ferrules to mate at the operating temperature of the industrial heat source. The mated ferrules expand and contract substantially independently of one another, but form a substantially gas-tight barrier for shielding the tube sheet/boiler tube assembly from the waste gas of the industrial heat source.

Abstract: A system for mounting a side frame to a heat exchanger is provided in which the heat exchanger has a header plate and the side frame, a radial extending flange that lies parallel and adjacent to the header with aligned openings in the header and side frame flange. For each of the aligned openings, a spacer that is used has a tubular portion at one end and an enlarged diameter flange at the other. A bolt extends through the aligned openings and through the spacer. A nut on the bolt secures the spacer to the header. A tubular elastomeric washer is received on the spacer tubular portion and is compressed between the spacer radial flange and the side flange. Changes in length of the heat exchanger are permitted without changing the length of the side frame by compression of the elastomeric washer.

Abstract: Disclosed is a high temperature heat recovery system having a unique high temperature heat exchanger made of refractory and ceramic materials which can operate in gas streams of up to about 1,500.degree. C.

Abstract: An improved radiator assembly for supporting a cooling core has first and second push pads positioned contiguous to the opposite sides of the cooling core. The push pads have spaced apart slots therein. First and second side rails are positioned contiguous to the first and second push pads. The side rails have spaced apart tabs that extend within the push pad slots. The slots are of greater longitudinal dimension than the tabs thereby permitting the push pads to move longitudinally relative to the side rails. A plurality of tie rods extend between the side rails to hold the side rails and thereby the radiator assembly together.

Abstract: A heat exchanger coil is comprised of plural metal tubes of generally circular cross-section, plural heat transfer enhancing fins and plural relatively flat metal support plates, each of which has plural first holes and plural second holes arranged in parallel rows. The tubes are laced through the respective holes in the plates and through aligned holes in the fins such that the tubes extend generally at right angles to the respective planes of the plates and fins. In one embodiment, each plate is cut to define two discrete flexible sections and a resilient arm for flexibly coupling one of the two sections of each plate with a relatively fixed portion of the corresponding plate. The first holes, which are oversized relative to the outside diameter of the tubes laced therethrough, are formed in both the relatively fixed portion and the two flexible sections of each plate. The second holes, which are smaller in diameter than the first holes, are formed only in the two flexible sections of each plate.

Abstract: A flexible, pressurized insert for insertion within the hot (evaporator) side of an inclined heat pipe that forms a part of a heat pipe heat exchanger. This insert is employed in order to prevent such heat pipe from rupturing in the event the working fluid contained therein freezes. This insert is constructed of a thin-walled flexible material that is capable of being deformed (i.e. compressed) thereby absorbing the expansion pressures exerted by the working fluid should the working fluid freeze or be exposed to freezing temperatures. By such absorption, the outer heat pipe itself will not be over-pressurized which might otherwise lead to its rupture. Upon the thawing of the working fluid, the pressurized insert (which is at a pressure greater than that of the working fluid in its non-frozen state) will once again regain its shape.

Abstract: A steam generator configuration, in particular of a low temperature carbonization-combustion plant, includes a supporting structure. A flue gas channel is disposed in the supporting structure and has a first vertical segment, a second at least approximately horizontal segment, and a third vertical segment being connected through the second segment to the first segment to form a structural unit. Supporting members suspend the first segment in the supporting structure in order to avoid restrictions to expansion and deformation of the flue gas channel as a result of thermal expansion. The supporting members are in an oblique or slanted position relative to the vertical in a cold condition. The oblique position essentially corresponds to a thermal expansion of the second horizontal segment in a hot condition. The supporting elements are parallel to the vertical in the hot condition.

Abstract: Leaks in tube bundles for a heat exchanger are eliminated or minimized by tube interrelated techniques. A floating tube bundle is constructed with separate support elements also secured to the heat dissipating fins and extending through and supported by the support plates. Thin-walled copper tubing similar to that used for the fluid-carrying tubes is used as support tubes, and steel rods are inserted into these support tubes to provide the necessary strength. To minimize leakage in the area where the tube bundle is joined to a header, connector tubes are provided that have one end joined to the header and the other end extending into one of the tubes of the tube bundle sufficiently far that the end of the connector tube passes through the support plate and at least one fin.

Abstract: A condenser made of concrete for an axial exhaust turbine, the condenser being carried on a concrete raft and including a plurality of superposed bundles of heat exchange tubes, wherein the condenser includes end vertical tube plates connected via flexible seals to the walls of the condenser and intermediate vertical tube plates, said tube plates being secured to one another by ties and supporting the tubes of the bundles so that they are free to expand, the intermediate plates adjacent to the end plates being carried by internal steel support brackets that are fixed to the walls of the condenser. The bundles of heat exchanger tubes are easily mounted and maintenance thereof is facilitated.

Abstract: Incompressible ceramic heat exchange blocks which may be catalyst coated having gas flow channels therethrough or other incompressible heat exchange surface are supported in a metal framework to form a removable basket for a rotary regenerative air heater. Between selected rows of the incompressible heat exchange material are layers of compressible corrugated metal heat exchange plates. This layered structure is packed into the framework in the compressed state.

Abstract: A reinforced hydraulically expanded flow channel (18) is disclosed which prevents the width of the hydraulically expanded flow channel (18) from changing. This reduces the strain rate in the high strain area next to the welds (16). After the hydraulic expansion process, the ends (20, 22) of the hydraulically expanded flow channel (18) are restrained by a rigid structure (24) such as a tubular member (28). When a tubular member (28) is employed, additional support is provided opposite the desired heat transfer surface (26).

Abstract: A structure comprising an LP module of a steam turbine supported by a concrete support-block carried by posts standing on a concrete raft, and an enclosure constituted by an exhaust box surrounding the LP module and connected thereto via elastic seals and by a condenser provided with bundles disposed beneath the LP module and resting on the raft, wherein the enclosure is made of concrete. The condenser envelope made of concrete is thus totally independent of the turbine and of its support-block.

Abstract: A heat exchanger apparatus (20) of the type having a rigid, unitary, parallel piped shaped core (21) mounted in a frame (22) defining support areas for the core. The core (21) is formed of a plurality of thin parallel plates (30, 30a) defining alternating passages (32, 34) for two different gas flows. Each plate (30) is connected to an adjacent plate by parallel elongated bars (31, 33) along side edges thereof, the bars being of stronger construction than the plates. The core (21) has four vertical corners, a pair of lower transverse corners and a pair of upper transverse corners. The frame (22) includes a pair of spaced parallel plates (23) and transverse structural connectors (24). Seal means (45, 46, 70) are provided both between the vertical corners (41) and the transverse corners (51) of the core (21) and the adjacent surfaces (26) of the frame defined by the pair of plates (23) and by the structural connectors (24).

Abstract: A spring-biased system for suspending a reactor tube in a reactor (e.g. a hydrogen reforming furnace) which allows the tension in each reactor tube to be easily monitored while the reactor is in operation. The suspension system includes high precision springs, the compression of which is adjusted to pre-tension a respective reactor tube so that abnormal expansion of that tube during heat-up will be readily apparent from any change in length (i.e. compression) of the springs.

Abstract: The present invention provides a heat exchanger member adapted to extract or impart thermal energy from or to a body, which member comprises:a. a substantially solid core member having bores therethrough through which heat exchange medium can flow; andb. an outer cladding of stainless steel over at least those areas of the member to be in direct contact with the body.

Abstract: The invention relates to a plate-type heat exchanger comprising a stack (1) of plates (2) for heat exchange between fluids which circulate between each other, said stack being placed within a pressure vessel (3). The invention is characterized in that it comprises rigid means for suspension of said stack (1) from said vessel (3) at the level of at least a first collector circuit which comprises a first connecting box (21; 23) at the upper end of the stack (1) and guides a first of said fluids between said end and the exterior of the vessel (3).

Abstract: A corner frame construction for a heat exchanger includes an elongated L-shaped member disposed between the top and bottom plates of the heat exchanger. The L-shaped member has a first leg extending parallel to a first edge of the media layers and a second leg extending perpendicular to the first leg and parallel to a second edge of the media layers. A first flange is connected to the first leg and extends inwardly toward the edge of the media layer and a second flange is connected to the second leg and extends inwardly toward a second edge of the media layer. A layer of flowable sealant is disposed along the length of the L-shaped member and is contact with both the first and second legs, the first and second media edges and the first and second flange members.

Abstract: A tube stop for cooperation with a tube and fin furnace wall and a horizontal buckstay which includes first and second generally parallel generally planar spaced plates, apparatus for attachment of the first and second generally parallel generally planar spaced plates to the associated tube wall. A U-shaped plate has first and second opposed generally planar generally parallel space side walls, the first and second side walls being respectively disposed in spaced relation generally parallel relationship to the first and second generally parallel generally planar spaced plates, apparatus for coupling the first and second walls of the U-shaped member respectively to the first and second generally parallel generally planar spaced plates, and apparatus for rigidly coupling the U-shaped plate to the to the associated horizontal buckstay.

Abstract: A heat exchanger adapted to handle dusty hot waste gases including a vertically oriented shell through which the waste gases flow longitudinally downward. The shell contains a tube assembly of vertical tubes having external, longitudinal heat transfer fins with the tubes being connected for fluid flow and support of their upper and lower ends to a central vertical support/header assembly. This support/header assembly is a tube divided into an upper header, a lower header and a center support tube section.

Abstract: An improved water heater is shown which includes a water heating tank having external cylindrical sidewalls, an interior, and initially open upper and lower ends. A combustion chamber is connectable to the water heating tank and houses a burner for the combustion of a selected fossil fuel. A fire tube unit of a fixed length is received within the interior of the water heater tank and has an upper transverse wall section, a lower transverse wall section and interconnecting fire tubes. The fire tubes have open interiors which receive the products of combustion from the combustion chamber for heating water contained in the water heating tank. Flanges and resilient seals are located at the upper and lower ends of the water heating tank for securing the fire tube unit within the interior thereof.

Abstract: A buckstay system for a membraned-tube wall having a first wall section which meets a second wall section at an angle to form a corner, utilizes the natural load carrying ability of membraned tube wall construction to simplify or eliminate structural components previously utilized at such locations. Some embodiments use the membraned-tube wall corner configuration alone, or in combination with corner reinforcing plates and/or stiffening members to distribute combustion gas pressure loads to adjacent membrane-wall panels. Other aspects provide reinforcement only to accommodate transient overpressure conditions.

Abstract: A heat exchanger for heating fluid particulate material comprising a heating chamber (11), heating means associated with the heating chamber (11), a receptacle (14) mounted above the heating chamber (11), a delivery chamber (17) located below the heating chamber (11), a set of flow passageways (16) extending through the heating chamber (11) between the receptacle (14) and the delivery chamber (17), the delivery chamber (17) having an outlet (18) at its lower portion wherein the delivery chamber (17) is provided with at least one restricted passageway (24) opening into the heating chamber (11) for the relief of gaseous pressure developed in the delivery chamber (17).

Abstract: A sanitary concentric tube heat exchanger for cooling or heating flowable or pumpable products is disclosed. In one embodiment, two concentric tubes are sealed together with inlet and outlet openings. The product is allowed to flow through the outer of the two tubes while the heating or cooling medium flows through the inner tube. In another embodiment, a third concentric tube surrounds the product tube and is used for the flow of additional heating or cooling medium. A securing clamp open on one end of the product tube secures the product tube to the outer surface of the inner tube and can be easily dismantled for cleaning purposes. A seal assembly secures the other end of the product tube to the outer surface of the inner tube and permits relative movement between the inner tube and the product tube for accommodation of thermal effects during operation, and also to allow the asembly to be easily dismantled for cleaning or inspection.

Abstract: An air cooled heat exchanger is comprised of a plurality of generally parallel fluid carrying tubes joined at the ends so as to form a refrigerant circuit which is free floating with respect to its means of support. The fluid carrying tubes are directly connected to heat transfer fins running generally perpendicular to the tubes. The fins in turn are connected to non-fluid carrying support tubes which are generally parallel to the fluid carrying tubes. The support tubes are secured at their ends to end plates and as necessary to a center plate or plates. There is no direct contact between the end plates or center plates and the fluid carrying tubes, which are free to move with respect to the end plates and center plate or plates. Therefore, damage to the fluid carrying tubes and leakage which often occurs at the connection between a fluid carrying tube and a support plate due to abrasion caused by vibration and temperature changes is eliminated.

Abstract: Heat from heat-generating components (13) requiring cooling in a space vehicle (2) is transferred to a heat radiator (5) through a heat-conductive cylinder (3) and heat-conductive sleeve (6) in thermal-communication contact between the heat radiator (5) and a base plate (1). Heat can be conducted to the heat-conductive cylinder (3) through a flexible heat conductor (14) in the form of a flexible heat-strap or a rigid heat conductor with flexible connection at either or both ends. The base plate (1) can be attachable to the outside or to the inside surface of an exterior portion of the space vehicle (2). If attachable to the inside surface, the entire thermal-control device can be extendable from an inside position in the vehicle. A cold plate (24) with optional laser-beam and heat-deflective construction can be positioned at the opposite side of the heat radiator (5) from the base plate (1) and can be swivelable to maximize resistance of sun heat or hostile laser beams.

Abstract: Clearance control is provided by circumferentially segmented cooling manifolds having spray bars located radially outside selected components of the stator casing. Cooling air is directed onto stator components and returns immediately through circuitous paths to improve uniformity of cooling. The spray bars extend through limited circumferential angles to limit distortion due to uneven heating.

Abstract: Circular heat exchangers have been used to increase the efficiency of engines by absorbing heat from the exhaust gases and transferring a portion of the exhaust heat to the intake air. The present heat exchanger is built to better seal the cooler recipient fluid from the heated recipient fluid and the donor fluid within the operation of the heat exchanger. The circular heat exchanger is also easily removable from the engine should repair or servicing be required. The manifold is interwoven between the inlet ports and the outlet ports and sealingly separates the cool recipient fluid from the heated recipient fluid. The tongue and groove compensates for the expansion and contraction of the core due to the thermal variations imputed by exhaust from the engine and compensate for such thermal variations.

Abstract: An air cooled heat exchanger is comprised of a plurality of generally parallel fluid carrying tubes joined at the ends so as to form a refrigerant circuit which is free floating with respect to its means of support. The fluid carrying tubes are directly connected to heat transfer fins running generally perpendicular to the tubes. The fins in turn are connected to non-fluid carrying support tubes which are generally parallel to the fluid carrying tubes. The support tubes are secured at their ends to end plates and as necessary to a center plate or plates. There is no direct contact between the end plates or center plates and the fluid carrying tubes, which are free to move with respect to the end plates and center plate or plates. Therefore, damage to the fluid carrying tubes and leakage which often occurs at the connection between a fluid carrying tube and a support plate due to abrasion caused by vibration and temperature changes is eliminated.

Abstract: A fuel burning furnace includes a number of energy efficient features. The furnace includes a heat exchanger in which combustion air is preheated by hot discharge gases. Diverters are provided in the heat exchanger to continually urge hot combustion gases toward the interior portions of the heat exchanger to improve its heat transfer characteristics. The furnace incorporates a number of features to determine malfunction and indicate inefficient operation. A humidification control system for the humidification or dehumidification of circulated air also is provided. The furnace also includes a blower motor system which compensates for loss of tension in driving belts and makes correction for blower speed in response to temperature variations.

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: 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 mass and/or heat exchanger includes at least one bundle of capillaries, the ends of which are embedded in a casting composition, and a housing in which the capillaries with the casting composition are arranged in such a way that the casting composition represents a liquid-tight isolation between the lumens of the capillaries and the space outside the capillaries. An elastic element which compensates for differences in changes of length of the at least one bundle of capillaries and the housing, is provided between the casting composition and the housing.

Abstract: A fuel burning furnace includes a number of energy efficient features. The furnace includes a heat exchanger in which combustion air is preheated by hot discharge gases. Diverters are provided in the heat exchanger to continually urge hot combustion gases toward the interior portions of the heat exchanger to improve its heat transfer characteristics. The furnace incorporates a number of features to determine malfunction and indicate inefficient operation. A humidification control system for the humidification or dehumidification of circulated air also is provided. The furnace also includes a blower motor system which compensates for loss of tension in driving belts and makes correction for blower speed in response to temperature variations.

Abstract: A stepped support and seal plate (44) is sealed to firing tube (18) with an axially compressed seal (62). It carries sleeves (24) and is sealed thereto by gasket seals (55). A diagonal movement seal (69) seals plate (44) to the wall of pressure vessel (10). Bellows (76) has a straight portion (77) at the hot end. Insulation (14) is tapered to provide variations in heat transfer from the bellows to provide a uniform strain pattern in the bellows.

Abstract: A high pressure, multi-tube and sheet-type heat exchanger including a U-shaped jacket formed from a pair of elongate tubular sections, a fluid medium inlet disposed adjacent one end of one of the tubular sections and a fluid medium outlet disposed adjacent one end of the other tubular section, and a pair of U-shaped semicircular half sections connecting the other ends of the tubular sections, a plurality of one-piece U-shaped tubes of heat conductive material arranged in parallel-spaced relation within the jacket through which the high pressure product flows and a tube sheet mounted on the end of each tubular section, each tube sheet being provided with a plurality of openings corresponding to the number of tubes in the jacket, the tube ends being aligned in the openings in the tube sheets and sealingly affixed thereto either by welding or by press fitting a tubular insert into the open end of the tubes.

Abstract: A nuclear steam generator having anti-vibration bars for limiting the motion of spaced heat exchanging tubes is provided with a shim located between every n.sup.th tube where n is greater than 1. The shims have a thickness equal to n times the dimensional difference (x-y) of the distance x between a pair of tubes and the width y of an anti-vibration bar between the tubes. The shim is of channel-shape and is put in position by cutting and removing the wrap-around bars from the outside of the tube bundle, inserting and expanding a bladder to spread the pair of tubes in the bundle on opposite sides of an anti-vibration bar, moving the anti-vibration bar between the pair of tubes to one side of the opening created by the bladder, inserting a shim of modular links between the anti-vibration bar and one tube of the pair of tubes and repeating the bladder inserting, expanding and anti-vibration bar moving steps to insert shims at intervals n along the bundle.

Abstract: A tube and shell type heat exchanger providing multi-pass contraflow of two heat exchange fluids includes a cylindrical outer shell, a modular baffle assembly guiding a shell fluid, a plurality of multi-wall tube sets and a pair of opposed end assemblies. A fixed end assembly fixedly receives one end of the tube sets and provides manifolding for directing multi-pass tube fluid flow through the tube sets. An opposite, floating end assembly slidably receives and seals floating tube ends to accommodate temperature induced expansion and contraction. The floating end assembly also provides manifolding for directing the multi-pass tube fluid flow through the tube sets. A triple wall tube set may be employed to provide extra protection against contamination of heat exchange fluids.

Abstract: A tube and shell type heat exchanger providing multi-pass contraflow of two heat exchange fluids includes a cylindrical outer shell, a modular baffle assembly guiding a shell fluid, a plurality of multi-wall tube sets and a pair of opposed end assemblies. A fixed end assembly fixedly receives one end of the tube sets and provides manifolding for directing multi-pass tube fluid flow through the tube sets. An opposite, floating end assembly slidably receives and seals floating tube ends to accommodate temperature induced expansion and contraction. The floating end assembly also provides manifolding for directing the multi-pass tube fluid flow through the tube sets. A triple wall tube set may be employed to provide extra protection against contamination of heat exchange fluids.