Abstract: A shell and coil type heat exchanger evaporator provides cooling for industrial coolants characterized by high viscosity and a poor heat transfer coefficient. A large heat transfer surface area is provided within a limited volume, and without a high coolant pressure drop. A short initial cool down period is provided due to minimized heat exchanger mass and minimized volume of liquid coolant in the heat exchanger during initial cool down.

Abstract: The temperature distribution of a heating medium in the reactor is allayed and the occurrence of hot spots is repressed. In a shell-and-tube type reactor provided with donut type and disc type baffle plates, reaction tubes are disposed even in the holes formed in the donut type baffle plates and an empty space devoid of a configuration of the reaction tubes is formed at the center of the shell. According to this invention, (meth)acrylic acid and/or (meth)acrolein can be produced at a low energy by catalytic gas phase oxidation of propylene- or isobutylene-containing gas.

Abstract: An overmolding insert includes a base having at least one opening in a first surface, the opening communicating with a second surface opposite the first surface, at least one hollow projection extending from the first surface, the hollow projection having a first opening communicating with the opening of the first surface and a second opening located at a terminal portion of the hollow projection, the insert further having two opposed side walls, each side wall being joined to the first surface, two opposed end walls being joined to an opposite end of the first surface and extending from one side wall to the other side wall. The side walls, the end walls, and the first surface define a partially closed space, with the terminal portion of the hollow projection extending beyond the partially closed space.

Abstract: Baffles (20, 22) arranged alongside a plurality of conduits (12).

Abstract: A heat exchanger system for a device for autothermal reforming of a hydrocarbon having a reaction zone fed with at least two fluids which react with one another, the reaction zone being at a higher temperature level than an environment of the device and at least one of the fluids being heated by the reaction products effluent from the reaction zone. The heat exchanger system includes tubes for transporting the effluent reaction products, at least one section of the tubes being arranged essentially parallel to a center axis of the reaction zone and led through the flow path of the fluid to be heated. At least sections of the flow path are curved helically or spirally around the center axis so that the fluid to be heated impinges on and passes around the tubes containing the effluent reaction products essentially perpendicularly.

Abstract: A shell-and-tube reactor has a plurality of reaction tubes incorporated therein, a circulation path for the heating medium formed outside the reaction tubes, a heating medium introducing section provided on the upper part of the shell in the reactor and a heating medium discharge section provided on the lower part of the shell in the reactor, a back pressure applying means for the heating medium is further provided in the heating medium discharge section.

Abstract: A container for homogenizing and heating or cooling a liquid working medium is disclosed. The container includes a tubular heat exchanger disposed in the interior space of the container, with the liquid working medium flowing through flow-through tubes of the heat exchanger that are in contact with a heat-exchange medium, A cup-shaped baffle which Is formed of a partition wall and a cover secured to an end of the partition wall proximate to the medium outlet of the flow-through tubes surrounds the heat exchanger and subdivides the interior space of the container between the tubular heat exchanger and the container wall in at least two concentric annular spaces, with each of the concentric annular spaces containing the working medium. The container is suitable for homogenization and heating of polyol components in a polyurethane injection molding apparatus.

Abstract: A support plate for retaining tube array spacing within a heat exchanger tube and shell structure. The support plate having a plurality of individual tube receiving apertures formed therein. Each apertures has at least three inwardly protruding members and bights are formed therebetween when the tube associated therewith is lodged in place to establish secondary fluid flow through the support plate. The inwardly protruding members terminate in flat lands that restrain but do not all contact the outer surface of the respective tube. These flat lands minimize fretting wear and eliminate potential gouging of the outer wall of the tube. The plate wall forming each aperture has an hourglass configuration which, inter alia, reduces pressure drop, turbulence and local deposition of magnetite and other particulates on the support plates.

Abstract: A reactor (1) is described in which a catalytic reaction, associated with a thermal effect, is performed on substances contained in a gas flow, in particular the recovery of sulphur from gases containing hydrogen sulphide. A housing (2) of the reactor (1) comprises a gas inlet (6) and a gas outlet (9). Inside the housing (2) is arranged a bed of catalytically active material, heat being supplied to or withdrawn from said material by means of a temperature regulating device (23) depending upon the nature of the reaction. The temperature regulating device (23) is formed by a plurality of tubes (24) bent in a U-shaped formation. In each case one side of all these U-tubes (24) leads into a first distribution chamber (17) which can be supplied with a heat carrier medium. The other side (24aa, 24ba) of the U-tubes (24) in each case leads into a second distribution chamber (18) from which the heat carrier medium can be discharged again.

Abstract: In such an exchanger, in which the blocks have fluid inlet openings in communication with the interior space of a supply box which runs alongside the block and communicates with at least one analogous box of an adjacent block to form a fluid supply line, in order to even out the distribution of fluid between the openings of the blocks, the supply line contains at least one grating (30) leaving perforations (301) and solid parts (302) which are distributed in such a way as to create pressure drops which are such that the flow velocities of the fluid in the inlet openings downstream of the grating have similar values.

Abstract: A method for manufacturing a ceramic shell-and-tube type heat exchanger having a plurality of heat transfer tubes and tubular plates joined to both the end portions of these heat transfer tubes which has the steps of inserting the heat transfer tubes of sintered tubular ceramics into through-holes of the tubular plates of unsintered plate-like ceramics having a plurality of the through-holes, standing the heat transfer tubes vertically to a floor surface, and then firing them in a condition where the tubular plates are positioned at both the upper and lower end portions of the heat transfer tubes, thereby integrally joining the tubular plates to both the end portions of the plurality of heat transfer tubes by the utilization of a difference between firing shrinkage ratios of both the members, the method having the steps of interposing at least one tubular plate between the tubular plate positioned at the upper end portions and the tubular plate positioned at the lower end portions of the heat transfer tubes,

Abstract: A heat exchanger has an outer pressure jacket, which is provided with an entry connection for the supply of and an exit connection for the removal of a first heat exchange medium, the jacket surrounding U-shaped, bent pipes through which a second heat exchange medium flows. The pipes are mounted in a pipe supporting floor that is connected with the pressure jacket. The U-shaped pipes are surrounded by a guide jacket which is inwardly radially spaced from the inside wall of the pressure jacket and defines an intermediate annular space therewith. Inner and outer legs of the U-shaped pipes are respectively positioned on one of two concentrical partial circles. The inner pipe legs surround a central pipe which is oriented along the longitudinal axis of the heat exchanger, is connected with the entry connection, is open towards the interior of the heat exchanger, and extends from one end of the heat exchanger to the vicinity of the pipe supporting floor which is located at the other end of the heat exchanger.

Abstract: A heat exchanger 10 comprises a pressure vessel 14 having a feed inlet 11 in an upper part thereof for particulate material to be subjected to heat exchange and an outlet 13 at a lower part thereof for the outflow of particulate material from the vessel 14. A plurality of heat exchange elements, such as heat exchange plates 12, arranged in spaced relationship inside the pressure vessel 14 to define flow passages between adjacent heat exchange elements 12 is provided for particulate material to flow therethrough under the force of gravity. The pressure vessel 14 has an inside wall extending around the heat exchange elements 12 and further comprises a trap, such as a baffle 22, between the heat exchange elements 12 and the inside wall for trapping particulate material leaking from the flow passages between the heat exchange elements 12 to form a gas barrier 26 between the heat exchange elements 12 and the pressure vessel 14.

Abstract: A cooler includes a stationary side plate, a plurality of cooling pipes, a housing and an inlet and outlet cap. The cooling pipes are contained winding around in the housing, with one ends connected with the side plate closed up with the inlet and outlet cap to let A cover is fixed on an upper wall of the housing near the side plate and a hole provided in the upper wall to let hot oil coming from an oil tube fixed in the side plate to flow in the housing to move up and down along separating plates provided vertically in such a way to form an up-and-down passageway for hot oil to be cooled down and flow out of an oil exit in the bottom of the housing.

Abstract: A heat exchanger is provided, including a tubular shell having an opening in one end thereof, an open-topped, side-slotted shroud mounted inside the shell, a bundle of tubes extending through the opening into the shroud, means for circulating a hot fluid through the bundle of tubes,means for charging a heat-exchange fluid to the space between the shell and the shroud for flow through slots into the shroud and into indirect heat exchange contact with the bundle of tubes for cooling the hot fluid, andmeans for removing heated exchange fluid from the top of said shell.

Abstract: A heat exchanger includes first and second circuits disposed in a counterflow configuration for respectively channeling first and second fluids. In one embodiment, the first circuit is joined to an aircraft engine fuel tank with the first fluid or fuel being a heat sink, and the second circuit is joined to a plurality of aircraft engine oil sumps, with the second fluid or oil being cooled in the heat exchanger by the fuel. The second circuit of the heat exchanger includes first and second outlets in succession with a portion of the oil being removed prior to completion of flow through the heat exchanger and channeled to one or more of the sumps. The remaining portion of the oil in the heat exchanger is removed after completion of flow therethrough at a lower temperature than that of the first portion and is channeled to a predetermined one of the sumps for providing cooler oil thereto.

Abstract: A vessel-type fluid cooling system includes an upper mixing chamber and a lower holding chamber, the chambers being separated by a transverse separating wall. One or more cooling tubes extend between the mixing chamber and the holding chamber, and cooling elements, such as fluid-cooled tubes, are located within each cooling tube. A heated fluid inlet provides heated fluid to the mixing chamber, and a cooled fluid outlet discharges cooled fluid from the holding chamber. Each cooling tube includes one or more inlets toward its upper end, and fluid is supplied from the mixing through the inlets to passages defined by the cooling tubes for cooling the fluid as the fluid flows downwardly through the cooling tubes. The cooled fluid is discharged into the holding chamber.

Abstract: A heat exchanger has a shell baffles, tube supporting means and tubes, in addition to end caps for the shell once formed, to furnish an intergral heat exchanger. The sheet for forming the tubular sheet and baffles are formed from a singular sheet of material. The tube supporting means includes he baffles which have a plurality of openings formed therein receive the tubes. The sheet is laser or die cut to form the integral baffles and rails, for insertion into the outer tubular shell, and in a further embodiment, with its closure end caps, forming the complete heat exchanger.

Abstract: The present invention relates broadly to methods for heating or cooling a media in a indirect heat exchanger. In a specific embodiment of the invention, the indirect heat exchanger is a shell and tube heat exchanger where the tube is coiled within the shell and the coiled tube includes baffles at least every third coil. The media is passed through the coiled tube and a coolant or heat source flows through the surrounding shell such that the coolant or heat source floods the entire shell. The baffles redirect the coolant or the heat source in such a way as to cause turbulent flow. This turbulent flow allows the heat transfer process to be conducted in a uniform and highly efficient manner.

Abstract: A heat exchanger has a shell, baffles, tube supporting means, and tubes, in addition to end caps for the shell, formed to furnish an intergral heat exchanger. The tubular shell and baffles are formed from a singular sheet of material. The tube supporting means includes the baffles, which have a plurality of openings formed therein to receive the tubes. The sheet is laser or die cut to form the integral baffles and outer tubular shell, and in a further embodiment, its closure end caps, for integrally forming the heat exchanger.

Abstract: A shell unit for use in a two pass shell and tube heat exchanger is provided. The shell unit has a return distributor means for providing direct fluid flow communication between the first pass of the two pass shell and tube heat exchanger and the second pass of the two pass shell and tube heat exchanger without excessive flow obstructions and associated pressure losses.

Abstract: The present invention relates to a heating apparatus having an object to form a construction of high thermal efficiency so that a heat transfer area of a surface to be heated in a heating chamber may be made small so as to miniaturize the whole equipment, and to utilize the whole quantity of supplied oxygen effectually thereby to suppress generation of polution materials.

Abstract: A stripping column installation especially for separating starting materials with a high boiling point difference comprises a stripping column having a withdrawal plate and a column sump, and a circulating boiler connected with the stripping column and having a pipe bundle through which a sump product from the stripping column flows. The circulating boiler has an upper plate and a separating wall which separates a space above the upper plate into two chambers. One of the chambers has a connection for receiving the sump product from the stripping column, while the other of the chambers has a connection for discharging the sump product after heating in the boiler.

Abstract: A multi-tube type heat transfer apparatus includes a plurality of heat transfer tubes disposed in parallel to each other within a shell wall. A plurality of holes having a larger diameter than the outer diameter of the heat transfer tubes are provided in each of a plurality of baffle plates disposed at intervals within the shell wall. The heat transfer tubes extend through the respective holes. A flow passageway of fluid on the side of the shell is composed of annular spaces formed between the outer circumference of the heat transfer tubes and the inner circumferences of the holes in the baffle plates.

Abstract: A heat exchanger and blood oxgenator apparatus includes a housing having a blood inlet portion, a blood outlet portion, and a housing wall defining an enclosed chamber disposed along a chamber axis between the blood input portion and the blood output portion through which to pass a quantity of blood to be temperature controlled. A heat exchanger tube having an exterior surface and a hollow interior through which to pass a heat exchange medium for purposes of exchanging heat with a quantity of blood brought into contact with the exterior surface, is disposed in a generally helical coil that is mounted within the chamber to encircle the chamber axis. A scalloped inner surface is included on the housing wall to face generally inward toward the heat exchanger tube.

Abstract: An heat exchanger transfers the heat from engine oil passing through a plurality of tube members to engine coolant within a housing for cooling the engine oil. The tube members are arranged within the housing in groups with the tube members in each group being aligned radially to form a fan shaped core. The cores are arranged circularly, so that the effective surface of the tube members through which the heat of the engine oil therewithin transfers to the engine coolant outside of the tube members becomes maximized.

Abstract: A proportion of the liquid metal flow passing through a fast reactor steam generator unit (SGU) is diverted past the outlet to a quiescent zone in the region of immersed tube-to-tubeplate welds at the water entry ends of the tubes, into which zone are given off any hydrogen bubbles which may result from a water leak into the liquid metal. The liquid metal in this zone is caused to flow through a weir system above which there is a gas space for collection of hydrogen, suitable means being provided for detection of hydrogen in this space. The hydrogen is entrained at the water inlet tube plate, the invention making use of the slow solution rate of hydrogen in sodium at lower temperatures prevailing in the quiescent zone at the water inlet end.

Abstract: A heat exchanger assembly (10) of the tube-fin type comprises a housing (12), a plurality of tubes (24), and a plurality of fins (26). The fins (26) comprise a generally flat plate (27) and have a plurality of holes (28) therethrough. The tubes (24) extend through the holes (28). The fins (26) further include a plurality of undulations (30). The undulations project outwardly from the plate (27) and are arranged in a plurality of engaging rows (32, 34, 36). The undulations (30) are offset between the rows (32, 34, 36) so that the crests (40) of the undulations (30) are not linear in the direction parallel to the width of the plate (27).

Abstract: A marine propulsion device comprising a propulsion unit adapted to be mounted on the transom of a boat for pivotal movement relative to the transom about a generally vertical steering axis, and about a generally horizontal tilt axis, the propulsion unit including a rotatably mounted propeller, an engine drivingly connected to the propeller, and a wall at least partially defining a cooling water jacket and having therein an opening communicating with the water jacket, and a fluid cooler extending through the opening and including a portion extending internally of the water jacket and having therein a fluid passage adapted to communicate with a source of fluid to be cooled in the fluid cooler.

Abstract: In a shell and tube heat exchanger, cooperation between a shell and shroud within the shell is established by at least one boss extending radially outward from the exterior surface of the shroud and at least one channel on the inside of the shell. The channel has longitudinal and circumferential path portions which are adapted to receive the boss so as to allow for longitudinal and radial temperature expansion without incurring undesirable stresses on either the shell or the shroud. The shroud is disclosed as further including at least one longitudinally extending alignment guide which enables cooperation with guide rails associated with a tube bundle positioned within the shroud.

Abstract: A nuclear steam generator vessel having a stayed tube sheet with an untubed circular central region in the upper surface thereof, a baffle plate disposed a predetermined distance above the tube sheet parallel thereto and a plurality of tube lane blocks spaced-apart longitudinally of a tube lane extending diametrically across the tube sheet, incorporates a system for controlling the flow velocity of secondary fluid along the tube sheet to reduce deposition of sludge thereon. The system includes a cylindrical flow boosting ring disposed coaxially with the central region and supported beneath the baffle plate a predetermined distance above the tube sheet. The ring may be used alone or in combination with one or both of two perpendicular vertical plates which extend diametrically across the central region in contact with the tube sheet, one of these plates lying along the tube lane axis and spanning the innermost ones of the tube lane blocks. When the ring is used with the vertical plates it is supported thereby.

Abstract: A heat exchanger for exchange of heat between two media, especially gas and liquid, in heat pumps and the like, including an elongated, generally cylindrical space (2) passed through by one medium and having an inlet (3) arranged at one end and an outlet (7) at the other end, and a helical wall radially defining said space and delimiting a space through which the other medium is intended to flow.

Abstract: A heat exchanger for heat exchange between a hot gas and a flowing medium that is conveyed in tube bundle heat transfer surfaces, especially a steam generator. The heat exchanger includes a pressure tank, the heat exchanger vessel in which are disposed tube bundles, and a hot gas conduit that is connected with a gas inlet of the heat exchanger wall. Also included are a gas guidance tube, a gas outlet to a circulation fan, and inlets and outlets for the flowing medium. The gas guiding tube opens into the heat exchanger from the side, and an annular channel is disposed after the gas inlet in the heat exchanger wall. The annular channel is delimited inwardly by a riser that forms the gas outlet and is disposed concentrically relative to the walls of the pressure tank and the heat exchanger. The gas from this annular chamber enters the tube bundles and, after being deflected, enters the riser that leads to the circulation fan.

Abstract: Shell and tube heat transfer apparatus and a corresponding process of heat transfer employ a fluid flow consisting of non-turbulent boundary-layers adjacent the inner and outer heat exchanger surfaces of the tubes and a non-turbulent core-layer between the boundary-layers and interfacing therewith. Interrupter-structures disposed within the tube and shell flow passes and interrupt the full development of the boundary-layers at a multitude of spaced spots, leaving the heat transfer surfaces unaltered, unmodified and uninterrupted, so that the boundary-layers cannot increase in thickness but will partially separate from the surfaces and mix non-turbulently with the core-layer to effect the required heat transfer between the surfaces and the fluid. The interrupter-structure preferably consists of a plurality of rows of spheres, with which the space remote from the heat exchange surface is filled with a space-filling material to prevent the useless flow of fluid in a space not effective for heat transfer.

Abstract: A vapor generator which utilizes a primary fluid to vaporize a secondary fluid is provided with an open flow channel and elevated discharge nozzle for the introduction of secondary fluid. The discharge nozzle is positioned above a portion of the inlet line such that a vertical section of inlet line is filled with secondary fluid prior to discharge into the open channel. In and around the open channel, incoming secondary fluid mixes with recirculated fluid before being discharged through the top of the channel and passed through a tube bundle where it is vaporized.

Abstract: A heat exchanger with two bundles of tubes is employed to cool the hot gases deriving from the synthesis of ammonia. The two bundles communicate directly at the incoming-gas end and through a reversing chamber positioned between them at the outgoing-gas end. The first bundle is surrounded by several chambers with separate media flowing through them. The second bundle is provided with still another separate medium flowthrough.

Abstract: An apparatus and method is disclosed for greatly increasing the efficiency of heater treater units, such as those used in heavy oil recovery, wherein exhaust air from the heater treater is circulated around incoming heavy oil lines from a freewater knockout unit to preheat the heavy oil reducing the required temperature increment provided by the heater treater to achieve a predetermined temperature for water/oil separation.

Abstract: An improved heat exchanger, applicable especially, but not exclusively, to a steam generator, preferably with straight or corrugated tubes (5) arranged in vertical concentric rows. The tubes (5) are maintained at certain axial levels thereof by concentric supporting systems, each of which consists of a zigzag circular strip (21) having alternate trapezoidal cells, and welded to a surrounding supporting strip (20). In the systems disposed at uncorrugated or "fixed" axial levels, the zigzag strip cells are shut off, after installation of the tubes (5), by a closing strip (22) to which is welded the supporting strip (20n) of the supporting system which is adjacent along the radial direction of the cylindrical casing (11), characterized in that at least some of the supporting systems (20, 21 . . . 20n, 21n) are independent of the supporting systems in the radial direction and form groups of supporting systems, and in that radial arms (14, 14', 14n) are provided for retaining said independent supporting systems.

Abstract: A heat exchanger for use with a pressurized fluid having a three-section sealing baffle between the inlet and outlet which improves efficiency by causing the fluid to flow more evenly and reducing the tendency of the fluid to recirculate or flow in eddies.

Abstract: A coaxial finned tube heat exchanger is disclosed. The heat exchanger comprises a hollow shell (10), a tube (14) mounted coaxially within such shell and having radially extending outer fins (16) of substantially large radial dimension in relation to the tube diameter. A first heat exchange fluid is passed in the tube and means (12) are provided for passing a second heat exchanger fluid through the shell. A plurality of segmental cut baffles (18) are mounted between adjacent fins at a predetermined spacing within the shell so as to achieve a cross-flow pattern for the second fluid between the fins of the tube, and a pair of bypass flow blockers (22) are mounted longitudinally on the tip of the fins to block circumferential flow of the second fluid between the shell and the tips of the fins and so force the fluid flow between the fins.

Abstract: Device for producing steam by heat exchange between a heat-transfer liquid metal and feed water, comprising a cylindrical casing (31) receiving liquid metal in its upper part through at least one nozzle (35, 36). The liquid metal enters in a space bounded by a central sleeve (38), a lower perforated distribution plate (40) and a first perforated plate (45). A second perforated plate (46) parallel to the latter is separated therefrom by perforated crosspieces (47). The perforated plates (45 and 46) are disposed between the sleeve (38) and a peripheral sleeve (39). The three plates (40, 45 and 46) have identical perforations which are aligned in the vertical direction. The distribution plate (40) is provided with stiffening ribs (44) ensuring the distribution of the liquid metal thereon. The invention applies, in particular, to fast breeder nuclear reactor steam generators cooled by liquid sodium.

Abstract: Radial support of a tube support plate is provided by two associated members which also permit the position of the tube support plate to be adjusted with significantly improved ease. The apparatus comprises a jacking member which extends radially through the heat exchanger's inner shell and is in positive contact with its outer shell. A locking screw extends radially inward from the jacking screw and is in contact with the tube support plate. After this apparatus is used to centrally locate the tube support plate, it is welded together and to the inner shell.

Abstract: A horizontal feedwater heater for use in heat power stations, of the type having a shell, a plurality of U-bent heat transfer tubes extended in the longitudinal direction of the shell and a vent tube extended in the longitudinal direction of the shell substantially at the center of the latter and adapted for extracting and discharging non-condensed gas. The feedwater heater has a baffle disposed at each side of the vent tube and having a horizontal plate portion extended horizontally from the vent tube and an inclined plate portion inclined downwardly from the end of the horizontal plate portion at an obtuse angle to the latter.

Abstract: Embossed patterns on fins for the tubes of a shell and tube type heat exchanger for increased efficiency and heat transfer rate, with minimum additional pressure drop. The fins extend transversely across most of the tubes in the tube bundle and have apertures through which the tubes pass. The embossed patterns, which have a "bow tie" configuration are spaced between adjacent tubes and have a generally convex or concave shape with respect to the planar surface of the fin. Each embossed area has a crest and a pair of opposite sides which slope from the crest down to the planar fin surface, and a pair of opposite arcuately shaped sides which slope from the crest to the planar fin surface, and which have arcs that conform to the arcs of the adjacent tubes. An array of such embossed areas are provided on the fin, and a plurality of fins are placed side by side in the heat exchanger to provide a large surface area for fluid contact.

Abstract: A heat exchanger comprising an outer casing closed at its hot and cool ends by two tube plates, a cluster of tubes which is connected to the tube plates to discharge into inlet and outlet collectors of a fluid flowing inside the tubes, and inlet and outlet tubings of a liquid flowing in the casing and around the tubes, wherein the exchanger comprises at its hot end a device for protecting the tube plate, such device comprising two plates united by a casing to define a first zone filled with such liquid in the static state forming a thermal screen, such plates being substantially parallel with the tube plate and a first one of such plates being disposed adjacent the tube plate, the protective device also comprising passages extending through such zone from one plate to another, and means for setting up a negative pressure between such first plate and the tube plates, to ensure that such liquid flows towards the tube plate inside such passages.

Abstract: In a reactor housing for conducting the catalytic oxidation of gaseous sulfur compounds, a plurality of empty tubes are arranged in an outer zone of the housing for having incoming gas to be reacted flow therethrough. Larger catalyst-filled tubes are arranged in an intermediate zone for having the gas flow therethrough after flowing through the empty tubes for performing the catalytic oxidation in the larger catalyst-filled tubes. An inner chamber includes an axial-flow pump arranged therein and is in communication with the outer and intermediate zones in such a way that a heat-transfer agent is caused to flow cross-currently into and out of the outer zone, intermediate zone and inner chamber for contacting the empty tubes and catalyst-filled tubes.

Abstract: A new type of sealing partition around heat exchanger tubes in heat exchanger walls is disclosed. A support structure is used to position and hold the tubes in place. Overlapping inserts are then inserted over the tubes adjacent the support structure and welded together to seal the heat exchanger chambers. When a heat exchanger is assembled using the invention the heat exchanger is easily and inexpensively assembled and the sealing partition in conjunction with the support structure provides structural support for the tubes and seals the chambers while allowing heat expansion and contraction of the chambers due to the varying temperatures in the heat exchanger.

Abstract: A heat exchanger is provided for a pressurized, closed cooling system for a marine propulsion engine. The heat exchanger includes a closed spiral passageway means for the fresh cooling water drawn from the lake or other water body. An outer housing encloses the spiral passageway and includes baffle means for directing of a coolant in a spiral path over the cooling passageway means within the housing. The coolant is thereby cooled by the circulating cold fresh water. An air discharge passageway means is provided in the center of the spiral path. The centrifugal forces associated with the spiral flow of the cooling coolant results in the water moving outwardly within the passageway while the air tends to collect within the center thereof where it is collected and discharged by the air passageway means for automatic separation and removal of the air.

Abstract: A tube bundle heat exchanger with baffles is disclosed wherein a tube bundle is housed within an inner casing which is acted upon from both the inside and the outside by a heating medium. The inner casing is not stressed by pressure caused by the heating medium since the medium flows both within and without the casing. The part of the circumference of each baffle which is in contact with the inner casing is tightly connected to the inner casing in order to prevent leak flows. Adjacent heat exchanger tubes of the tube bundle are separated from one another by a zigzag-shaped dividing wall. The dividing wall forms space-economical rerouting channels with the baffles. The tubes of the tube bundle are located parallel to the longitudinal axis of the heat exchanger, and therefore longitudinal in the longitudinal rerouting channels. The heating medium which flows through the rerouting channels flows across the tubes producing favorable heat transfer conditions.

Abstract: A heat exchanger comparising a shell attached at its open end to one side of a tube sheet and a detachable head connected to the other side of said tube sheet. The head is divided into a first and second chamber in fluid communication with a nozzle inlet and nozzle outlet, respectively, formed in said tube sheet. A tube bundle is mounted within said shell and is provided with inlets and outlets formed in said tube sheet in communication with said first and second chambers, respectively.