Abstract: Arrangement for heat and/or mass transfer between a minimum of two liquids, effected by means of hollow fibers, the open ends of which are imbedded in a casting compound and which hollow fibers are located in the form of hollow fiber modules within a housing, wherein an intermediate ring and gaskets are provided between the housing and the casting compound beds of the hollow fiber module. A bore in the housing allows in case of a defective gasket that leaking liquid may drain to the outside, whereby short circuiting between the different liquid chambers of the housing will be prevented. The intermediate ring may be present as lose component or may, also, be fixedly connected to the face plates of the housing or the housing jacket. A plurality of hollow fiber modules may be arranged within a common housing. The hollow fiber module may be surrounded by a perforated supporting tube. The arrangement is particularly suitable for cross-flow filtration.

Abstract: In a system and process for heating and cooling a house, circulated and/or intake air is passed through a system which utilizes low intensity and readily available geothermal heat capacity to heat or cool such air. The ducts of the system have an internal configuration and size that provides for relatively low velocity and correspondingly low pressure drop through such ducts yet provides air flow patterns that have sufficiently high air velocities adjacent the interior surface of the duct to provide extremely good heat exchange between such air and the interior surfaces of the ducts to utilize the low intensity temperature differentials provided by the earth mantle at only moderate depths adjacent a house in any of a great variety of areas.

Abstract: An engine cooling system including a filter connected in a radiator overflow system so that fluid flowing from the radiator to an overflow reservoir under the influence of pressure in the radiator will flow around the filter, whereas fluid flowing from the overflow reservoir to the radiator under the influence of atmospheric pressure when the pressure in the radiator drops will pass slowly through the filter.

Abstract: A heat exchanger within a dense gravity layer comprises a vertical cylindrical container with a heating surface built thereinto. The heating surface is formed by a tubular housing containing a plurality of tubes mounted in tiers. A space between the inner surface of the container and the outer surface of the housing is divided by opposite seals into two vertical cavities. These cavities are divided along the height thereof by horizontal baffle members which are arranged in chessboard pattern relative one another to form chambers located along the height in a chessboard pattern, and to accomplish repeated variation of the direction of movement of one of heat carriers.

Abstract: An improved finned heat exchanger tube wherein the upper circumferential portions of the fins are foreshortened to enhance axial movement of liquid introduced onto the top of the finned tube. Accordingly, the liquid can gravitate both axially and circumferentially of the finned tube and thoroughly wet the entire external surface thereof.

Abstract: A spine fin heat exchanger is disclosed in which the density of the spine fins is greater along the portions of the passes within the pattern of high flow of air or the like across the heat exchanger. Those portions of the tubing at the bends and outside such pattern are formed with a lower spine fin density. Such lower density outside the patterns and at the bends does not materially reduce the overall heat exchange capacity of the heat exchanger, and results in a heat exchanger where less material and time are required to form the heat exchanger without any significant loss in its capacity. The heat exchanger is preferably formed by changing the rate of feed of the tube as it feeds through the winding head to increase the amount of stretch of the spine fin strip along the zones of low density compared to the amount of stretch in the strip along the zone of high density. Consequently, the same amount of material is required for each wrap along both zones.

Abstract: Apparatus for recovering heat comprising an encapsulating outer wrapping having near opposite ends an air discharge opening and an opening adapted to receive an air intake blowing device; an inner corrugated galvanized sheet metal flue core; and two semi-circular baffles mounted in valleys of the inner core corrugations.

Abstract: An improved heat exchanger apparatus that serves alternatively as an evaporator and as a condenser, the heat exchanger apparatus comprising a frame and a heat exchange coil supported by the frame, the coil having a first coil end portion, a coil medial portion and a second coil end portion. The coil passes sinuously between ends of the frame such that the first coil end portion and the second coil end portion are disposed in the first coil row that is first contacted by air blown through the exchanger, and the coil medial portion is disposed to pass sinuously in subsequent coil rows so that approximately one half of the coil medial portion passes in co-flow heat exchange relationship to the air and approximately one half of the coil medial portion passes in counter-flow heat exchange relationship to the air.

Abstract: In the apparatus of the present invention, air flow control inserts are disposed within the formed tube air outlet manifolds of a heat exchanger of the counterflow type wherein the manifolds have openings communicating with air passages of the heat exchanger core. Each insert is generally tubular in shape, having an intermediate cylindrical tube portion, and larger diameter, end portions, which are substantially equal to the diameter of an outlet manifold. Each intermediate insert portion is initially provided with a plurality of peripheral, longitudinally equally spaced slots, equal in number to the number of openings in a manifold, and of such circumferential lengths as to subtend angles substantially equal to the angles subtended by the manifold openings. Tube material adjacent the slots is then urged inwardly of the tube to form apertures, and adjacent louvers.

Abstract: The grid for the parallel rows of tubes is composed of metal guide strips and spacer strips. The guide strips are disposed in pairs with semi-cylindrical portions defining circular openings for the tubes. The spacer strips are formed with bent portions to bear against the semi-cylindrical portions of the guide strips as well as rectilinear portions which are radial to the tubes.

Abstract: There is disclosed herein a heat exchanger of the multiple pass counterflow fin and tube type having an improved return bend construction. The return bend construction comprises a base member having a plurality of tapered tubular projections extending outward from one side thereof which define openings extending therethrough. These projections telescopically engage ends of the fluid conducting conduits or tubes. A cover member is provided which is secured to the base member and has a plurality of localized embossments provided thereon which are arranged so as to provide a passageway placing two or more openings in the base plate in mutual fluid communication. The base member also operates as part of a surrounding frame for the heat exchanger and may include mounting points for securing the heat exchanger in the equipment with which it is to be utilized.

Abstract: A heat exchanger is disclosed comprising a plurality of spaced apart parallel plates having a plurality of apertures therein, a plurality of hollow frusto-conically shaped cone members having a larger base end and a smaller opposite end with the cone members being inserted in the apertures of the plate and being of such relative size to be tightly embraced by the peripheries of the apertures, the opposite ends of the cones in each of the plates being tightly nested and stacked in the base ends of the cones in the next adjacent plate, and means for fixedly securing the plates in parallel relation to bind the cone members in stacked relation.

Abstract: Disclosed is apparatus for providing for increased heat transfer efficiency f a heat exchanger by separating contiguous fluid conductive channels by means of a flexible sheet fabricated from a piezoelectric polymer. An electrode pattern of predetermined configuration is applied to one or both sides of the piezoelectric sheet and an electrical signal applied thereto in order to set the sheet into a flexual resonance condition whereupon a standing wave pattern is established to not only break up the boundary layer of fluid which adheres to each side of the sheet, but also minimizing the thickness of the laminar sub-layer.

Abstract: The present disclosure describes a heat exchange device for attachment to the external surface of a package containing an integrated circuit chip or die. The device has particular application in high density electronic packaging configurations, where space limitations severely curtail the volume which can be occupied thereby. The structure of the present device is such that both the effective cooling area per given volume and the heat transfer coefficient are maximized. Basically, the device is an integral structure comprised of a generally helical wire form affixed to a metallic frame-like member. The wire form provides a plurality of parallel closely spaced-apart cylindrical sections capable of being disposed in an air stream for dissipating the heat generated in the integrated circuit package to which the device is attached.

Abstract: A heat exchanger has a heat-exchange plate having an edge and formed with a lurality of parallel spaced-apart longitudinal passages opening at the edge and with a plurality of transversely throughgoing plate holes at the edge between the passages. A manifold pipe formed with a row of manifold holes all opening in the same direction and spaced apart the same as the passages at the edge can be fitted to the plate with the plate edge over the row of manifold holes so that each of the passages is aligned longitudinally with a respective one of the manifold holes. A pair of L-section guides fixed on the pipe flank the row of manifold holes and define a gap corresponding to the shape of the plate at the edge. These guides are formed between the manifold holes with laterally throughgoing guide holes transversely alignable with the plate holes when the edge is fitted over the row of manifold holes.

Abstract: Method and apparatus for cooling a hot gas stream containing suspended finely divided particles wherein a cooling fluid is circulated through confined cooling elements located in a large flow housing, the gas stream to be cooled passing exteriorly of the cooling elements in countercurrent heat exchange relationship therewith. The cooling fluid is circulated through the cooling elements in a confined path and cleaning means are provided inside the cooling elements which are arranged to impact the cooling elements periodically to thereby dislodge particles adhering to the exterior surfaces of such cooling elements.

Abstract: A baffle array or assembly comprised of a plurality of longitudinal spacer rods and baffle plates is described. The spacer rods have a body portion and a protruded portion along their length. The protruded portion has a plurality of slots therein at spaced intervals. The baffle plates have peripheral openings therein adapted to receive the body portion of the spacer rods. The baffle plates and spacer rods are assembled into an array by positioning the baffle plates at right angles to the spacer rods, passing the spacer rods through the peripheral openings in the baffle plates and engaging the thicknesses of the baffle plates within the slots in the protruded portions of the spacer rods.

Abstract: A heat exchanger has a plurality of fluid flow tubes through which shuttle type cleaning elements are carried by the fluid, the direction of which is reversable. The cleaning elements are captured adjacent the tube ends by a transverse plate having cleaning element receiving openings therein. The plate is adapted to be mounted so that the openings register with the tube ends, and the plate openings are of sufficient length to contain the cleaning elements. At least some of the plate openings are connected by fluid flow slots which also communicate with the end chamber of the heat exchanger. A cleaning element stop device is disposed at the outer ends of the plate openings so that the cleaning elements are retained therein.

Abstract: A heat transfer device having an augmented surface is disclosed. The device comprises a base wall of heat conductive material having a plurality of pyramid-fins formed integrally with the surface of the base wall. The pyramid-fins are regularly spaced apart in the range of about 80-500 pyramid-fins per square inch and have a height in the range of 0.015 to 0.040 inch. The base wall is preferably a cylindrical tube and the pyramid-fins are formed as a knurled diamond pattern around the outside periphery of the tube.

Abstract: A heat transfer apparatus (13) adapted to releasably secure an elongate heating or cooling means to a pipe. Apparatus (13) has a flexible base member (3) that adapts to the radius of curvature of the outer circumference of the pipe and preferrably has at least one protuberance (8) in its wall. One or two resilient side walls (4) extend over the side of base member (3) that faces away from the pipe to provide a longitudinal cavity for containing the heating or cooling means. An entrance-way (6) is provided for inserting or removing the heating source into or from the cavity. Side walls (4) are shaped such that they press uniformly against the heating or cooling means and urge said means against base member (3). Means (11) are provided for securing apparatus (13) to the pipe so the heating or cooling means can be removed from or inserted into the cavity without having to release apparatus (13) from the pipe.