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: Raw gas/purified gas heat exchanger, particularly for dust-laden raw gas, features heat exchanger tubes through which purified gas flows and are arranged in a substantially vertical channel which is open at the bottom and is acted upon by raw gas from above. The tubes are arranged in different two-dimensional planes extending parallel to each other and to the symmetry axis of the channel.

Abstract: A total counterflow heat exchanger comprising a system of partitions dividing an interior chamber into a series of channels which coincide with the path of a duct through that interior chamber. A substance at one temperature is passed through the duct, and a substance at a second temperature is passed through the channels, thereby creating a temperature differential gradient over which thermal energy is transfered from one substance to the other as the substances flow through the heat exchanger. The arrangement of the partitions permits a substance to pass back and forth through the channels in the heat exchanger along the same path as the duct, so that while the substance may flow through the heat exchanger at the same net rate as if the partitions were not present, the length of the heat exchange gradient may be increased many times, therefore enhancing the efficiency of the gradient and the heat exchanger.

Abstract: The heat exchanger system is provided with a second duct part in communication with and downstream of the mixing chamber as well as a helical tube heating surface in the second duct part for conveying a working medium in heat exchange with the hot gas. A pair of branch ducts extend upwardly from the first duct part for the hot gas with the centrally disposed branch duct serving as a bypass for the hot gas. A restrictor in the form of a valve is provided at the upper end of the central branch duct to control the flow of hot gas therefrom into a mixing chamber.

Abstract: Rod type supports or baffles are disclosed for arrays of tubes, especially those arranged in the form of a tube bundle. Each baffle comprises a pair of arcuate surfaces with a plurality of rods extending therebetween and each rod being non-normally disposed with respect to the axis of a tube bundle. In a preferred embodiment, a plurality of baffles are employed in a tube bundle so as to cause shell side fluid to sweep across the tubes in a spiral pattern, such as a double helical pattern. The invention provides an improvement in the mixing of shell side fluid in a rod baffle heat exchanger.

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: A heat exchanger preferably of the type for heating water from hot gases or steam comprises first and second tubes arranged concentrically so as to define a channel inside the first tube, an annular channel between the tubes and a further channel outside the outer tube. The hot gases are arranged to pass inside the inner tube and outside the outer tubes so that water passing through the annular channel is heated from both the inner and outer surfaces. Such an arrangement can be built up into a total heat exchanger by an array of such co-axial tubes arranged side by side or by an array of such co-axial tubes arranged co-axially, that is with further tubes outside the outer tube. Baffles in the form of radial fins cause the fluid to move along an underside of the baffle toward a closed end and then to turn at the closed end back along an upper side of the baffles toward the outlet.

Abstract: A unit for guiding the flow of cold gas from the annular chamber that is disposed between the pressure tank wall and the steam generator wall to the circulation fan of a steam generator of a high-temperature reactor, with hot gas being adapted to be supplied to the steam generator wall via a hot gas guide mechanism. The cold gas flows into a riser through a plurality of cold gas channels that pass through the upper end of compensating tube bundles that are associated with the steam generator wall. From the riser, the cold gas is supplied to the circulation fan, with the riser being disposed in that portion of the hot gas guide mechanism that extends parallel to the central axis of the pressure tank.

Abstract: A heat exchanger which includes a casing having an outer tube and an inner tube fixed therein. Holes are formed in the inner tubes and face a heat transfer surface of the outer tube. Hot exhaust gas may be passed from an inlet of the outer tube into the inner tube, through the holes in the inner tube to an outlet. Coolant water may be passed through the casing from an inlet port to an outlet port. Baffles and/or twist coils may be provided to improve heat transfer.

Abstract: Liquid-vapor phase separation in reservoirs for cryogenic liquid propellants in space vehicles at zero gravity conditions is achieved through a system including a unique heat exchanger. A mixed phase inlet stream is partially separated by centrifugal force imparted to the stream by swirl inducers as the stream enters the inlet of the heat exchanger. Lesser density components are provided to the interior of a spiralled tube forming part of a heat exchanger to be condensed therein by the higher density components which are applied to such tube within the heat exchanger. Heat transfer efficiency is mzximized by making the tube of rectangular cross section and providing liquid impingement jets active on three sides of the tube and by providing a baffle which forces the heat transfer fluid to further cool the tube by convection on the remaining side thereof.

Abstract: An engine supercharger system has a heat exchanger cooling the supercharger air flow in response to supercharger pressure.

Abstract: The invention relates to a cooling device for a multi-stage compressor in which two coolers are placed in a common housing. The two coolers cool the medium of the preceiding stage of the multi-stage compressor heated by the input compressor work. The common housing has chambers that are divided into different pressure stages, are connected to the multi-stage compressor by inlet tubes and outlet tubes, and contain water separators with condensate removal pipes associates with them. To be able to conduct the medium to be cooled with a minimum of pressure drops, dividing walls (13, 23) are provided at a distance from the top and bottom end, respectively, of the cooling housing (50). Each dividing wall (13, 23) forms a cylindrical space (24, 14) with the housing wall (51) and the respective end walls (57, 56) of the cooling housing (50) for the installation of the water separators (15, 25).

Abstract: The invention relates to a boiler for boiling a mash or wort, having an interior partition dividing the boiler into a heat exchanger section and a precipitation section. The boiler according to the invention is characterized in that the partition divides the boiler into an inner precipitation section and a surrounding heat exchanger section, i.e. in that the precipitation section and the heat exchanger section are disposed one within the other. This results in the particular advantage that the overall height of the boiler may be reduced. Since in addition the full height of the boiler is available for the accommodation of pipe conduits in the heat exchanger section, the flow resistance in the pipe conduits may be reduced. In summary, the boiler according to the invention is of simple construction to thereby facilitate the cleaning thereof.

Abstract: A new approach to the theory of heat exchanger optimization is presented which shows the advantages of using low Reynolds and Nusselt numbers and low flow velocities along with a novel design, the microtube-strip (MTS) counterflow heat exchanger. The MTS exchanger in the preferred embodiment consists of a number of small modules connected in parallel. Each module typically contains eight rows of one hundred tubes, each of 0.8 mm outside diameter and 0.16 m length. The tubes are metallurgically bonded via the diffusion welding technique to rectangular header tube strips at each end. Caps suitable for manifolding are welded over the ends. Cages are provided to cause the shell-side fluid to flow in counterflow fashion over substantially all of the tube length, and suitable manifolds are provided to connect the modules in parallel. This design results in the highest power densities of any known design for single phase exchangers.

Abstract: A self-contained, wall-mountable cooling and filtering unit for hydraulic drive fluid featuring a coiled heat transfer pipe in a coil chamber which surrounds a drum-type filter cartridge, the hot fluid flowing through the coil chamber in the axial direction, before traversing the filter cartridge in a radial inward direction and exiting from the device. The heat transfer pipe is a finned pipe with an integral helical fin having is originally radial fin wall bent away at four folding lines in a rectangle, to form aligned fold segments in four longitudinal surface planes. The fold segments support superposed pipe turns in the heat transfer coil while positioning the latter against the walls of the coil chamber.

Abstract: A one-piece removable tube lane block includes an L-shaped angle bar, having one end thereof fixed to the closed end of a cylindrical sleeve and extending axially outwardly therefrom. The outer end of the sleeve has a radially outwardly extending annular retaining flange for engagement with the vessel wall at the outer end of the handhole. The blocking portion is dimensioned to be insertable through the handhole and into the tube lane to a use position with the distal leg of the L-shaped bar disposed perpendicular to the tube sheet and with the mounting sleeve disposed in the handhole and held in place therein by set screws extending radially outwardly through the sleeve.

Abstract: Heat exchange apparatus comprises a generally cylindrical tank having an inlet port for entry of gas and an outlet port for exit of the gas after it is cooled, and an annular bundle of tubes disposed within the tank. The tank includes a cylindrical side wall or shell which encloses the tube bundle, and upper and lower annular manifolds for controlling flow through the tube interiors. The annular tube bundle has a generally cylindrical interior having a longitudinal axis parallel to that of the shell. The interior of the annular tube bundle defines an inner plenum which communicates with one of the ports. The annular tube bundle is radially offset from the center of the tank to define an eccentric outer plenum which communicates with the other port.

Abstract: A heat exchanger of the type incorporating an auxiliary cooling device includes an envelope with inlet and outlet windows for conducting a primary heat transfer medium through the envelope. A bundle of heat exchange tubes is mounted in the envelope with corresponding first ends of those tubes being located adjacent to the inlet window and corresponding second ends of the tubes being located adjacent to the outlet window. First and second collectors are in fluid communication with the tube ends for conducting a second heat transfer medium through the tubes. The auxiliary cooling device is positioned in the inlet window and surrounds the tube first ends and a ferrule projecting upwards from the envelope from the inlet window therein surrounds the cooling device to direct the primary heat transfer medium through the cooling device and into the inlet window of the envelope.

Abstract: A steam generator incorporating a tube bundle (2) arranged in a bundle casing (5), in which the wall of bundle casing (5) incorporates openings each corresponding to a supporting component (20), openings along the edge of which are fixed sleeves (15) projecting radially into the space between the casing (5) and the outer wall (3) of the heat exchanger. Each of the supporting components (20) incorporates two cylindrical parts situated in extension of one another, a large-diameter part (20a) welded by its side surface inside the sleeve (15) and a small-diameter part (20b) abutting against the casing (3). Wedges (23) are inserted between the part (20a) of the supporting component (20) and a spacer plate (8) of the heat exchanger. The invention applies, in particular, to steam generators of pressurized water nuclear reactors.

Abstract: The invention relates to improvements in heat exchangers of the type having a container which defines a cylindrical cavity and a cluster of parallel cooling tubes extending through the cylindrical cavity. The housing is provided with a fluid inlet, a fluid outlet, and a center baffle dividing the cylindrical cavity into an inlet compartment and an outlet compartment. The inlet and the outlet are located on opposite sides of the center baffle, but near one edge thereof. An opening is provided near the opposite edge of the baffle, such that fluid must circulate through a nearly circular path within the cylindrical housing between the inlet and the outlet conduits. A second fluid such as cool air, may be blown through the parallel tubes for removing heat from the fluid in the cavity.

Abstract: A bundled-tube heat exchanger of the vertical arrangement type has a gas inlet chamber and a gas outlet chamber. These gas chambers are connected by gas transfer tubes. The gas transfer tubes are surrounded by cooling medium tubes within a housing chamber. Each of the cooling medium tubes opens out into a respective connecting chamber that is formed between the casing chamber, the gas inlet chamber, and the gas outlet chamber. A gas transfer tube that is open to the casing chamber connects the casing chamber to a connecting chamber.

Abstract: An indirect heat exchanger having interconnected tubes arranged to form a plurality of generally-parallel, elongated tube sections spaced from one another in a predetermined pitch pattern to form geometric void spaces between adjacent combinations of the tube sections in planes generally-perpendicular to the tube sections and separate baffle plates arranged in each of a plurality of spaced planes generally-perpendicular to the tube sections so that there is a void space on all sides of the baffle plates in each plane and arranged in different planes so that there is a void space in the planes in front of and behind each baffle. In a preferred configuration the tubes are arranged in concentric circles and the planes are spaced at a plurality of angular positions.

Abstract: A compact bayonet tube type heat exchanger which finds particular application as an auxiliary heat exchanger for transfer of heat from a reactor gas coolant to a secondary fluid medium. The heat exchanger is supported within a vertical cavity in a reactor vessel intersected by a reactor coolant passage at its upper end and having a reactor coolant return duct spaced below the inlet passage. The heat exchanger includes a plurality of relatively short length bayonet type heat exchange tube assemblies adapted to pass a secondary fluid medium therethrough and supported by primary and secondary tube sheets which are releasibly supported in a manner to facilitate removal and inspection of the bayonet tube assemblies from an access area below the heat exchanger.

Abstract: A heat exchange apparatus includes a core mounted within a casing and two fans arranged to draw air from the exterior of a building through the core in a first path and to draw air from the interior of the building through the core in a second path. The core is made up from a plurality of tubular cells each formed from a single folded sheet of aluminum and having a slot shaped cross section. The short sides of the slot are arranged to face the inlet of cold exterior air so that it impinges upon the outer surface of the short side. The fan drawing the warm air is arranged to direct air onto the other surface of the short side so that the short side and the surrounding portions of the long sides act as an effective heat exchange surface free from the seam of the tubular core which is arranged adjacent opposite the short side. A differentially perforated baffle plate spreads the cold air over core such that more cold air is directed to the warm end of the core.

Abstract: Heat exchange apparatus comprises a generally cylindrical tank having an inlet port for entry of gas and an outlet port for exit of the gas after it is cooled, and an annular bundle of tubes disposed within the tank. The tank includes a cylindrical side wall or shell which encloses the tube bundle, and upper and lower annular manifolds for controlling flow through the tube interiors. The tank inlet port is located centrally of the upper annular manifold, and the tank outlet port is located on the shell. The annular tube bundle has a generally cylindrical interior having a longitudinal axis parallel to that of the shell. The interior of the annular tube bundle is aligned with the inlet port so that the interior of the tube bundle functions as an inlet plenum for the gas entering the recuperator.

Abstract: A heat exchanger comprising a shell connected to vertically spaced apart horizontally arranged circular upper and lower tube sheets; a plurality of vertically positioned parallel tubes, with each tube extending through and connected to a hole in each tube sheet; a bottom sleeve-supporting plate positioned above, and spaced apart from, the lower tube sheet; a top sleeve-supporting plate positioned below, and spaced apart from, the upper tube sheet; a plurality of sleeves joined to holes in the top and bottom sleeve-supporting plates; each of said tubes being axially positioned in a sleeve so as to provide an annular space between the tube outer surface and the sleeve inner surface so that liquid can flow into the sleeve bottom end and out the sleeve upper end; an inlet to feed a heat exchange liquid into a space between the bottom sleeve-supporting plate and the lower tube sheet; an outlet to withdraw heat exchange fluid from the shell side of the heat exchanger above the bottom sleeve-supporting plate; and a

Abstract: A vertical heat exchanger has a vertical inner conduit surrounded by an outer casing formed with ports with a piercing nosecone at the bottom for facilitating insertion into the earth. The space between the inner conduit and outer casing includes a conductive fill and receives water or salinated fluid through a control valve thus saturating the area surrounding the outer casing. Alternatively, the vertical conduit containing the heat exchanging fluid may be arranged parallel to one or more vertical injector pipes formed with ports for injecting water or salinating fluid through a control valve into the region adjacent to the conduit.

Abstract: A waste-heat tank which is constructed as a pressure tank, is charged with coolant, and is connected after a pressure gasification. The waste-heat tank has a cooled feed device or tubular-fin-tubular construction which includes an ash container. The waste-heat tank also has a gas/liquid heat exchanger which includes equally long tubular elements which serve as heat transfer surfaces and are integrated into tubular or planar wall units. Each element of the tubular elements is formed of a tube having an axis which is located extending generally parallel to the container axis of the waste-heat tank. Each element itself is guided in a winding manner. Each tube opens via a feed tube into the finger-like end portion of the feed device. The finger-like end portion is coated with refractory material. Each tube is arranged in an individual tubular or channel-like chamber about a polygonal, preferably hexagonal, tubular or channel-like inner space arrangement.

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: The oxygenater heat exchanger disclosed utilizes a heat transfer tube having several tube legs arranged in closely spaced, parallel relation. A resilient central core fits resiliently within the tube legs and cooperates with spiral ribs on the tube and with the housing to form blood flow spiral passages down around the exterior of each of the tube legs. The blood inlet is positioned to enhance efficient heat exchange.

Abstract: The heat exchanger has a vertical central tube and a concentric jacket between which support plates extend radially and axially. The support plates carry a bunch of heat exchanger tubes and the jacket is formed near the top and bottom ends with apertures for a heat-yielding medium which flows around the heat exchanger tubes. Separating plates are disposed in registration with the support plates to subdivide the annular chamber extending around the upper end of the central tube and provide a continuation of the flow paths for the heat-yielding medium. These separating plates prevent a circulation of flows between the flow paths defined by the support plates during shut-down.

Abstract: A heat exchanger of the shell and tube type particularly suitable as an intercooler between compression stages of a compressor is disclosed. The heat exchanger includes a generally cylindrical shell having first and second coil banks disposed therein. The banks are spaced from each other and from the wall of the shell. The incoming fluid flows between the heat exchange coil banks and outwardly therethrough, passing in heat exchange relationship with a fluid flowing through the coils. The fluid velocity is reduced, substantially minimizing carryover of liquid in the fluid, and directional changes in the fluid flow causes disentrainment of liquid. A sump is provided in the bottom of the heat exchanger for removing the condensed liquids, and separate demistors or separators are not required. Access to the coils for cleaning and/or servicing may be had through a manway disposed in the shell, or through an openable end of the shell.

Abstract: A heat exchanger having a cylindrical shell divided into upper and lower chambers. A tube bundle may be disposed within the lower chamber, the tube bundle having spaced apart inlet and outlet sides which can be disposed either to one side or the other thereby permitting greater placement of the inlet and outlet ports on the shell. To this end the structure which divides the shell into upper and lower chambers includes a generally horizontal longitudinally extending plate assembly provided with openings to either side of a vertically extending barrier wall used for controlling the flow of air. Longitudinally extending guide bars are secured to the lower surface of the horizontal plate. The tube bundle includes upper and lower longitudinally extending shrouds, each of which is provided with a mounting bracket which extends away from the shroud along a longitudinally extending vertical plane which bisects the center of gravity of the tube bundle.

Abstract: A gas/liquid, parallel flow heat exchanger in a waste-heat tank which is constructed as a pressure tank, is charged with coolant, and is connected after a pressure gasification. The waste-heat tank includes conduit-like elements of equal length which serve as heat transfer surfaces and are installed in conduit-like components or wall units. The wall units divide the interior of the waste-heat tank into regions having upwardly and downwardly directed fluid flow. A central, coaxial, polygonal, preferably hexagonal, cylindrical displacement body is provided, with the number of surfaces of the displacement body depending upon the number of heat transfer surface elements. Also provided are wall units which project out of the wall of the container of the waste-heat tank into the interior thereof across from the corners of the polygonal displacement body. Cylindrical displacement bodies are located centrally between the corners of the polygonal displacement body on an imaginary circle.

Abstract: Apparatus in the form of a multi-unit cooler for cooling liquid samples of steam or water in boiler water feed systems or other process apparatus for the purpose of testing or measuring various inorganic and other components of the cooled samples as for example oxygen content, carbonates, sulfates, etc.

Abstract: A heat exchanger particularly for cooling of hot smoke gases with aggresive components by clean gas to be heated, has side walls having two spaced ends, bottom walls arranged at the ends of the side walls, a plurality of glass pipes extending substantially parallel to each other and to the side walls and arranged so that a smoke gas passes through the glass pipes, while a clean gas passes transversely to the latter, and flow passages extending along the side walls in direction of glass pipes and arranged for guiding the smoke gas.

Abstract: In a water heating system, vapor in the products of combustion gases is condensed in a secondary heat exchanger positioned in a housing with the primary heat exchanger and combustion chamber. The two heat exchangers are coaxial coils with the secondary coil surrounding the primary. Gases flow radially through the primary coil, axially along a baffle and then axially through the secondary coil at an increased velocity. The gas/air mixture is burned in a burner within the primary heat exchanger and the gas product are drawn through the exchangers by a blower. A water storage tank is designed to enhance stratification of hot water over cooler water. The cooler water is used to condense vapor in the secondary heat exchanger.

Abstract: The heat exchanger is constructed with a single pressure vessel to contain the ducts for the hot gas flow and the heating surfaces for the secondary medium. The heat exchanger is provided with a central duct for the hot process gas and two parallel branch ducts through which sub-flows of the process gas pass. A throttle member is provided in at least one of the branch ducts in order to throttle the flow of hot gas therethrough. Additional hot gas can be bypassed from the duct section into the exhaust gas from the pressure vessel.

Abstract: The invention relates to an apparatus for the transfer of heat by means of hollow filaments which extend in the form of a helix and/or a spiral and are provided in more than two layers. The apparatus may be made up of a multilayer winding. The outer diameter of the hollow filaments is preferably 0.05-1 mm and the wall thickness is 5-20% of the outer diameter. The invention also relates to the use of this heat exchanger in various heating systems.

Abstract: A tertiary heat exchanger having three sets of adjacent ducting, two stacked within the third, all of which carrying heat exchange mediums so that the heat carried by one medium in any set of a ducting is efficiently transferred to the other two. Two of the three sets of ducting are tubing and this tubing is spirally coiled in a container within the third set of ducting. The two sets of tubing are in alternating layers and the fluid flow of the heat exchange mediums are in opposite directions in each adjacent layer of the tubing. Outlet channels are provided at various points along the helical path of a ducting so as to alter the effective length of a ducting.

Abstract: A vent condenser that includes an inner tube, an outer shell mounted on and surrounding the inner tube, a middle shell having an annular body and a closed upper end mounted with the body thereof radially spaced between the inner tube and the outer shell, and a helical heat exchange tube mounted in the space between the inner tube and the middle shell in engagement with the body of the middle shell and with the inner tube. A helical channel is formed between the middle shell, the inner tube, and spaced convolutions of the helical tube. Cooling fluid is directed through the helical tube. Discharge from the deaerator vent passes up the inner tube to return along the helical channel to be cooled in indirect heat exchange relation with the cooling fluid in the helical tube to condense water therefrom and to separate the water from noncondensable gases.

Abstract: A vertical heat exchanger adapted to be located between a primary liquid alkali metal circuit and a secondary liquid alkali metal circuit in a fast neutron nuclear reactor is disclosed. The exchanger includes an outer sleeve surrounding an annular tubular bundle on an axial conduit for introduction of the secondary liquid alkali metal in the tubes through a chamber provided in the bottom of the exchanger. The bottom of the exchanger is surrounded by an envelope defining a space in which the primary liquid alkali metal circulates between an annular opening provided at the periphery of the tubular plate carrying the tubular bundle and at least one output opening in the bottom of the envelope.

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: In a non-contact heat exchanger such as a heat recovery steam generator, the performance efficiency is dependent upon full utilization of the available hot gas flow. In a heat recovery steam generator, hot gas is channeled past fluid carrying tubes whereby the tube-side fluid (water) is heated into steam. It has been discovered that gas flow along the heat exchanger sidewalls results in an unacceptable heat loss and that this loss may be corrected by the use of sidewall baffles so constructed as to obviate any alignment difficulty.

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: A heat exchanger assembly has an elongated shell provided with fluid inlet and fluid outlet openings. An elongated bundle assembly is received within the shell. The bundle assembly has a plurality of elongated tubes extending generally longitudinally and a plurality of generally parallel fin plates which are transversely oriented. The bundle assembly has a top sheet and a bottom sheet. The bundle assembly support is interposed between the bottom sheet and the shell. A baffle is provided in the form of an elongated plate extending generally diagonally between the top sheet of the bundle assembly and the shell. In a preferred form, the baffle plate is provided with an underlying seal which is interposed between the baffle plate and the top sheet and has an upper edge which is of generally complementary curvature with respect to the adjacent portions of the shell and may take the form of a portion of a sine wave.

Abstract: The energy conversion system disclosed is especially adapted for use with hydrocarbon or fossil fuels, for instance natural gas, with which substantial quantities of water vapor are developed when the fuel is burned, for instance in an engine, such as a turbine or a cylinder and piston internal combustion engine. In the system according to the present invention increased efficiencies are achieved by employment of a special form of power package capable of much more effectively utilizing the waste heat of the exhaust gases than has been practicable heretofore. The application also discloses tube-in-tube type of heat exchangers for use in the disclosed and also in other energy conversion or transfer systems.

Abstract: A circulation heater for heating a fluid, particularly a liquid such as oil, includes an imperforate heavy-duty steel tubular body closed at both ends and having internal vanes establishing a plurality of separated longitudinally - extending chambers therein. The vanes are ported to establish a fluid flow path serially through the chambers from an inlet communicating with a first chamber to an outlet communicating with a last chamber. One or more metal-sheathed electric heating elements are located within each chamber and the chambers and heating elements therein are so arranged and designed, for example, by making the chambers of uniform transverse cross-sectional area and placing different numbers of heating elements of identical transverse cross-sectional area in each chamber, that the velocity of the fluid increases as it flows from the inlet to the outlet.

Abstract: A helical coil of tubing is disposed in a cylindrical tank in spaced relation thereto so as to act as a baffle for the products of combustion introduced thereinto by creating a tortuous passageway in said tank. The helical coil has its end portions arranged in spaced parallel sections defining supporting skids extending longitudinally of the helical coil and thereby supporting the same in said tank. The tank is positioned in a secondary larger cylindrical tank and the fluid to be heated, such as oil, is circulated through the helical coil, the skid-like parallel communicating portions thereof forming the supports and in the area between the tanks to obtain a highly efficient heat transfer.

Abstract: Elements and tube-type heat exchanger employing such elements include a hollow core and a spiral baffle formed integrally with the core and extending axially thereof. The spiral baffle includes openings for receiving pipe bundles extending axially of the core. The core of each of the elements is stepped and recessed such that a plurality of the elements may be fitted together to form the heat exchanger.