Abstract: A heat exchanger having a flow of air therethrough adapted for use in refrigeration systems includes a heat exchange coil and a plurality of sheet-like fins. The coil is formed of a plurality of tubes having a cooling medium flowing therethrough. Each of the fins are provided with openings for receiving the tubes in heat transfer relationship. A plurality of tabs are arranged in a surrounding relationship around the lower portion of the openings on the tubes for preventing the blow-off of condensate drops forming on the underneath side of the tubes.

Abstract: A segmented ring header is disposed between and welded to two pressure containment vessels. The segmented ring header comprises a first hemi-toroidal shell having a plurality of openings around its inner circumference shaped to mate with heat transfer tubes lining the first pressure containment vessel, a second hemi-toroidal shell having a plurality of openings around its inner circumference shaped to mate with heat transfer tubes lining the second pressure containment vessel, and a flat ring-shaped plate disposed between the first and second hemi-toroidal shells and welded therebetween. Both the first and second hemi-toroidal shells also have a plurality of openings along their outer circumference for directing the cooling fluid to a collection drum located outside of the pressure containment vessels.

Abstract: A heat exchanger having a shell lined with a plurality of heat transfer tubes, heat exchange surface disposed within the shell and submerged in a first heat transfer fluid, and a tube manifold penetrating through the shell and directing a second heat transfer fluid to and from the heat exchange surface. The tube manifold has an elongated L-shaped outer enclosure which has one leg disposed within the shell and the other leg penetrating through the shell, and an elongated L-shaped inner tube which passes through the outer enclosure. A first fluid flow path through the tube manifold is established through the inner tube and a second fluid flow path through the tube manifold is established between the inner tube and the outer enclosure.

Abstract: An improved heat exchange tubing and blade assembly is described. The heat exchange assembly comprises an elongated tube and an elongated heat exchange blade strip positioned thereon. The heat exchange strip includes an array of integrally formed blade segments which extend from a U-shaped support segment of the strip. Surfaces of the blades extend at a favorable angle of attack to the incident fluid flow stream, and in a preferred embodiment the chords of the blades extend in a direction substantially normal to a longitudinal axis of the tube. The strip is supported on an outer surface of the tube, and a means integrally formed with the tube maintain the support segment in thermal contact with the tube.

Abstract: A holding device for disc-shaped semiconductor elements on a supporting wheel, particularly a rotating semiconductor device, is disclosed and includes two clamping members between which the semiconductor element is gripped by its end faces. At least one electrical connection is also between the clamping members. The holding device further comprises a resilient member for producing a contact pressure. The clamping members, the semiconductor element and possibly the associated cooling elements are preferably disposed as a fully assembled structural unit in recesses at the outer periphery of the supporting wheel.

Abstract: An apparatus comprising in combination (a) an elongated bundle of flexible, relatively small diameter, thin walled hollow polymeric tubular elements of various lengths, in a twist configuration having a length greater than the housing and a lateral dimension securing means at both ends, (b) a housing means for said bundle wherein said bundle extending entirely within said housing means with said bundle anchored to said housing means in said twisted configuration, (c) means for securing in fluid tight arrangement said housing means to said lateral dimension securing means and (d) circular spacers for the tubes, the longer length of said bundle when secured within said housing means causing a bowing of said tubes that permits flexing and moving of the tubular elements in said bundle.

Abstract: A cooling tower apparatus for cooling by dry and natural draft in which a battery of exchangers is shared among several independent networks fed separately by a cooling fluid, and the nominal thermal dissipation of the newtorks in operation is maintained by separation of the air flows inside the tower by means of an appropriate partition, especially by a double-shelled structure having application for the elimination of untransformed calories in electrical plants of all types, especially thermal and nuclear.

Abstract: A heat exchanger of a ceramic body, or the like, having a plurality of elongate flow passages in parallel relationship with the placement of the passages staggered with respect to the opposite end cover walls of the ceramic body, transversely extending parts of both cover walls being absent to expose those staggered passages that pass closer to the respective cover wall, thereby to permit access for fluid media to the flow passages; particular characteristic features of the passages are disclosed.

Abstract: A plurality of horizontally positioned plates stacked on top of one another, with thin film plastic sheets separating each adjacent pair of plates. Each plate is formed with a substantially identical, horizontally extending, vertically through passageway, with the sheets separating the passageways of each plate. Upper and lower pressure plates, provided with pressurized air bags, maintain uniform pressure across the plates to prevent leakage from the passageways. Manifold devices at opposite ends of the passageways direct a first heat exchange medium through a first set of vertically alternate passageways, and direct a second heat exchange medium through a second set of vertically alternate passageways positioned intermittently with respect to the first set of passageways.

Abstract: A heat exchanger for transferring heat from primary fluid to secondary fluid and particularly one which is especially suitable for cooling a fast breeder nuclear reactor is disclosed herein. The heat exchanger includes a plurality of thermally conductive, concentric shells spaced apart from one another so as to define a number of primary annular spaces and physically isolated secondary annular spaces therebetween. The primary fluid is directed in a continuous flow through the primary annuli, while at the same time the secondary fluid is directed in a continuous flow through the secondary annular spaces.

Abstract: An apparatus for heating or cooling sand comprising a heat exchange section provided in a lower portion thereof with flow regulating means consisting of a pyramidal or conical funnel assembly for causing flow of sand in the heat exchange section over the entire sectional area thereof.

Abstract: A heat-reclaiming system is especially adapted for reclaiming heat from used laundry water. It comprises a heat exchanger providing for heat transfer from warm used laundry water to cold incoming water intended for use as fresh laundry water. The heat exchanger is formed with interior ducts and an outer shell. The interior ducts, preferably concentric coils hydraulically in parallel, define a space for the transport through the heat exchanger of the cold incoming water. The outer shell encloses the ducts, and the ducts and shell together define a space providing for the transport through the heat exchanger of the warm used laundry water. The flows of the warm and cold water through the heat exchanger are generally in opposite directions. Maximum heat-transfer efficiency is accomplished by simultaneously pumping both the shell and the duct sides of the exchanger at design flow condition and maximizing the log mean temperature difference across the heat exchanger.

Abstract: A heat exchanger element, especially of undulating or folded configuration aving an end closure thereon in the form of a band shaped in conformity with the heat exchanger element and sealingly connected thereto while the legs of the undulations of the band which face each other are also sealed together. In one form of the invention, the band is spaced from the end of the heat exchanger element and the open ends of the undulations are sealed as with solder.

Abstract: A device for use with heat exchangers for the transfer of sensible and latent heat between a gaseous and liquid medium is provided. The device includes a first set of narrower passageways defined between at least two corrugated foils to receive the liquid medium, and a second set of wider passageways to receive the gaseous medium. The surfaces of the foils defining the narrow liquid passageways have closely spaced fine ridges which cross the corrugations. These fine ridges cause flow resistance and result in the liquid medium in the liquid passageways being distributed over the entire surface area of the foils defining the liquid passageways, thus enhancing heat transfer. Furthermore, because the ridges tend to rigidify the foils defining the liquid passageways, these foils can be formed from a relatively thin material, thus further enhancing heat transfer between the liquid and the gas mediums.

Abstract: A heat exchanger comprising an elongated tubular cylindrical member having fluid ingress and egress openings adjacent to its opposite ends and external flanges at opposite ends one of which flanges has a counterbore facing in the direction away from the cylindrical member. A plurality of graphite tubes within the cylindrical member having their opposite ends connected to graphite headers one of which is connected through a graphite end member to one end of the cylindrical member and the other of which has an outside diameter slightly less than the inside diameter of the cylindrical member and within which it is slidable or floats. The floating header has an external circumferential groove with outwardly inclined ends. A seal is provided at the end of the cylindrical member at which the floating header is located which seal includes packing in the counterbore in the adjacent flange and a gland member slidable on the floating header and adjustable towards the flange.

Abstract: Heat exchange apparatus characterized by recirculation channels for the exchange fluid is disclosed.

Abstract: The invention relates to a heat exchanger, constituted by a plurality of superposed units, each unit being constituted by a cylinder provided with outer fins and inner fins. The tightening of the units on one another effects a seal between a space inside the units and an outer space. Fluids circulate respectively inside and outside. The units are of sufficiently short dimension to allow an easy shaping of ribs and particularly of inner ribs. The invention is more particularly applied to the exchange of heat between two gaseous fluids.

Abstract: A heat exchanger incorporating double-walled tubes utilizes three tube sheets to provide economical leak detection.

Abstract: A heat exchanger comprises a battery of rectilinear tubes of synthetic plastic material connected at their respective ends to headers. At least one of the headers is fixed to the wall of the tower and the remainder of the exchanger is mounted by suspension members to allow free expansion of the tubes of the battery.

Abstract: A passive heat exchange enhancement structure which operates by free convection includes a flat mounting portion having a plurality of integral fins bent outwardly from one side edge thereof. The mounting portion is securable around a stovepipe, to a flat surface or the like for transferring heat from the pipe through the fins to the surrounding air by rotation-enhanced free convection.