Abstract: A tube-bundle heat exchanger which allows replacement of the tubes. The heat exchanger tubes are held and sealed into a replaceable sealing arrangement consisting of an elastic sealing tube plate and two rigid tube plates arranged on either side which press the elastic sealing tube plate in the axial direction sealing the tubes. Force may be transmitted to the rigid tube plates by external means or by operating pressure of the media flowing in the heat exchanger.

Abstract: When plate heat exchangers are used with hazardous fluids the gasketing at the periphery may be replaced by welding the plates in pairs, with elastomeric gaskets between adjacent packs of plates. However, it is still necessary to have a gasket around the through holes (6) for the hazardous medium to seal them from the other medium. In accordance with the present invention, these gaskets are of duplex form (8, 9) with a sealed space (11) between the gasketing. In order to detect leakage into the sealed space a diluent fluid may be circulated through the sealed spaces and a detector, refer to FIG. 2.

Abstract: A supporting grid for tubes comprising a central reticular structure formed of main and secondary intersecting strips, an inner annular frame formed in the same material as the strips and so designed as to receive with a tight fit the ends of said strip therein, said inner frame being higher than the reticular structure so that upper and lower projecting portions are created together with cleaning ducts, and an external annular frame formed of a different material and consisting of an external box ring and of an external cover ring capable of receiving and containing therein said projecting portions of the inner frame, axially extending and inwardly facing dogs being provided at the inner portion of said external frame; the inner frame and the external frame being assembled so that at room temperature said dogs of the external frame fit tightly to the inner cylindrical surface of said projecting portions while play exists between the external cylindrical surface of the inner frame and the internal cylindrical

Abstract: A heat exchanger, particularly for use in heat pumps, either as an evaporator or as a condenser or both, comprises for the flow of a refrigerant one or more pipes helically coiled around a core pipe. This structure is mounted inside a mantle-pipe which serves for the flow of a heat carrying medium, such as water, and is helically coiled around a vertical axis or bent to another compacted shape making the center line of the turns of the helically coiled pipe or pipes extend horizontally or at a slight inclination to the horizontal. The refrigerant is fed to one end of the helically coiled pipe or pipes and then flows back through the core pipe. The heat carrying medium flows through the mantle-pipe in the same general direction as the flow of refrigerant through the helically coiled pipes.

Abstract: A tube support embodying a plurality of supporting members, each having grooved opposite side members with a crossbar extending therebetween, the supporting members being disposed in inter-locked relation to each other, with the crossbars being vertically spaced from each other to support tubular members thereon, and with the crossbars of upper supporting members extending down into the grooves in immediately underlying members.

Abstract: A thermal energy transfer apparatus and method to efficiently transfer thermal energy between two or more media, such as plural fluids, a fluid and a solid, two solids, etc. A thermally conductive mesh-like member provides relatively large surface areas for energy transfer therethrough. In one embodiment the mesh-like member disperses a fluid flowing therethrough while simultaneously effecting efficient and substantial thermal energy transfer therewith. A pair of thermally conductive generally solid discs direct the fluid into and receive fluid from the mesh-like member while also distributing thermal energy in the mesh-like member and/or transferring thermal energy with respect to the latter, for example, to a source or dissipator of thermal energy.

Abstract: An industrial cooling exchanger used for cooling air or another gas comprises an inlet collector and a return collector connected by heat exchanger elements dismountably assembled to said collectors by insertable parts. The collectors are floatingly mounted and a tight assembly between the collectors and the heat exchanger elements is provided by interposing therebetween at least one deformable gasket.

Abstract: A steam surface condenser has its tube bundle arranged in a manner so as to have an outer zone of tubes for receiving cold water and surrounding an inner zone of tubes containing warmer water so that most of the condensing of the steam is in the outer zone. A gas cooling section is located in the outer zone adjacent the upper end of the tube bundle. Condensate trays are provided adjacent the cooling section at spaced points along the length of the tube bundle for receiving condensate. Conduits are provided for conveying the condensate from the trays to the exterior of the shell so that such condensate does not contaminate condensate in a hot well.

Abstract: The present universal radiator assembly is intended to accommodate or to be used as a replacement for many different types of automobile radiators. The main assembly includes a conventional radiator core and two semi-cylindrical tanks made from sheet metal. The tnaks may be partially formed and then the flat side of each tank may be soldered into position to permit free passage of fluids from the radiator core into the tanks. Then the free edges of the sheet metals member may be bent around into engagement with one another. These edges are severely bent or flanged, and are locked into engagement with a longitudinal lock rod of triangular cross-section which is open on one side. The tanks are then longitudinally soldered along the mating edges. The four ends of the two semi-cylindrical tanks are closed by mounting flanges having a large central aperture.

Abstract: A finned heat exchange tube is made from a refractory metal such as titanium, titanium alloy, stainless steel, and iron-nickel alloy containing more than 10% nickel, by rolling into the outer surface of a tube of said metal integral fins having a low fin height of less than 0.045 inch (preferably less than 0.033 inch in titanium and less than 0.045 inch for stainless and the iron-nickel alloys), a high fin density of at least 26 fins per inch of tube length (preferably from 27 to 30 fins per inch), and a high fin surface area per unit length of tube which is at least 2.4 times greater than the comparable surface area of the tube prior to finning. The thickness of the tube wall underneath the finned area preferably is made less than the height of the fins.

Abstract: In a cross finned tube heat exchanger including a multiplicity of side-by-side fin plates, and a plurality of heat transfer tubes extending through the fin plates at least in one row to provide a serpentine flow passage for a heat transfer medium which exchanges heat with another heat transfer medium flowing across the surfaces of the fin plates, a multiplicity of stepped louvers are formed on the wall of each fin plate between the adjacent heat transfer tubes of the same row. The stepped louvers each extending in a direction at right angles to the direction of air flow across the surfaces of the fin plates include at least one tilting rise wall and may differ from one another in shape depending on their positions. The stepped louvers on each fin plate may be arranged in the form of waves or uniform in height with respect to the direction in which each fin plate extends. The adjacent stepped louvers have edges varying in vertical positions.

Abstract: A cooling capsule for disc-type thyristors consists of two half-shells containing spherical depressions. A lens-shaped core, arranged between the two half-shells, guides the coolant, so that only a small pressure drop takes place. In addition, large-area and uniform heat removal at both end faces of the cooling capsules is obtained. The cooling capsule can be produced and machined efficiently, since screw machine parts are used exclusively.

Abstract: A structural support for a module of a concentric tube type recuperative heat exchanger. A plurality of support beams 18 extend laterally across each module to support upper and lower tube sheets 22-24 independent from surrounding housing structure. The support beams are attached to the tube sheets by pivotal hangers 26 that permit relative movement therebetween, while said support beams are themselves supported at their ends on lateral shelf units affixed to the housing that surrounds each module.

Abstract: A heat exchanger such as an oil cooler for exchanging heat between two fluids such as coolant water and oil in which the heat exchanger has a tank or casing through which coolant is circulated and containing a stack of heat exchange units each comprising a pair of plates joined together at peripheral edges but spaced apart to provide an oil path defined also by spacer means through the successive internal fluid chambers of the units and a coolant path also defined by spacer means between the units. The spacers between the units comprise sections of the plates making up the units and spacers. The disclosure also includes a bypass valve for bypassing most of the internal fluid chambers in the successive units when fluid such as oil is above a selected viscosity which indicates that much less cooling is required.

Abstract: A heat exchanger having a disc and doughnut baffle configuration, in which the tubes are laid out in a set of concentric rings. Each ring of a set contains the same number of tubes as each other ring of the set, and the tubes in each ring are spaced uniformly apart. Each tube in each ring is located circumferentially midway between the two adjacent tubes of each neighboring ring and is separated from each of the two adjacent tubes in each adjacent ring by a ligament distance h. The distance h is held constant for all tubes in the set, by varying the radial spacing between rings, and the distance between any two adjacent tubes in any ring of the set is made greater than or equal to 2 h. The ligament gaps h which are constant therefore determine the minimum flow area between adjacent rings, and therefore the mass flow velocity through the tube bundle is constant.

Abstract: A fluid-cooled element for partially defining hot gas flow passage extending upstream and downstream of a minimum area throat. A serpentine conduit of fluid communication with a coolant source routes cooling fluid within the downstream portion of the element wall bounding the hot gas passage to an internal pocket upstream of the throat. The coolant is thereafter exhausted upstream of the throat as a film over the wall. The upstream wall portion is cooled by the known impingement and film-cooling technique resulting in an element wherein all of the coolant enters the hot gas passage in a low Mach number region upstream of the throat, thereby minimizing momentum losses due to mixing. In the preferred embodiment, the passage throat is defined by a plurality of turbine nozzle vanes, the fluid-cooled element comprising a nozzle band thereof.

Abstract: The ends of the tubes of a heat exchanger condenser are provided with cage-like basket assemblies including tube cleaning brushes or the like. A distributor arm is disposed to move across the tube ends and cause a counter-flow of fluid to move the brushes through the tubes. The tubes are compartmentalized to form bundles. The compartmentalization of the tubes for fluid counter-flow is accomplished by the baskets themselves. Each basket of the assemblies arrayed to form the boundaries of a desired compartment is formed with an outwardly extending lip, with the lips of adjacent baskets joined to form an elongated contact surface for sealing engagement with the distributor arm. The lips of the adjacent baskets forming the respective compartments are generally arcuate, and the distributor arm portions adapted to engage the elongated contact surface are at least as wide as the arcuate extent of each basket lip. The radius of the lip arc is greater than that of the basket.

Abstract: There is disclosed a novel sieve assembly for collecting cleaning balls from a fluid passing through the tubes of a heat transfer system and comprised of a plurality of guide members having cleaning body support members disposed therebetween with the distance between guide members being at least equal to the diameter of the cleaning bodies and with the distance between the top surface of the guide members and the top surface of the cleaning body support members being at least 0.5 times such diameter.

Abstract: To provide for axial guidance of cooling fluid, typically water, through a double-jacketed cooling roller which has an outer jacket (5) rotatably positioned over an inner stationary displacement body (6), in which the inner displacement body is smaller than the inner surface of the outer jacket to define a space (19) for flow of cooling fluid therethrough, the inner surface of the outer rotating jacket (5) is formed with spirally extending surface deformations (16), such as grooves or ridges or ribs or vanes, to transport water being centrifugally pressed against the inner walls of the rotating jacket (5) in axial direction. The axial end of the chamber (19) preferably is formed by an enlarged radially extending chamber (21) in which guide vanes (22) are located to return water flow to a hollow central shaft (9) for removal of cooling fluid axially therethrough.

Abstract: A fluid-circulation system, specifically a heat exchanger with entrance and exit ducts interconnected by a bank of tubes, is provided in its exit duct with an extractor for intercepting generally spherical cleaning bodies of sponge rubber or the like which are to be returned to the inlet duct via a bypass connection for recirculation through the tubes. The extractor comprises two substantially symmetrical screens, converging downward in the direction of fluid flow, which direct the oncoming cleaning bodies into a narrow collecting box having a sloping bottom near one or more outlets forming part of the bypass connection. The two screens have generally planar confronting surfaces and are swingable about respective transverse axes into a downwardly diverging position in which their opposite surfaces are exposed to the flow for cleansing purposes during a regeneration phase.