Abstract: A method is provided for manufacturing a concentric-tube heat exchanger which includes at least a pair of concentric tubes disposed one within the other to form an annular longitudinally extending flow channel in which a plurality of heat transfer promoting fins reside. The method includes the step of applying a radially directed force to one of the pair of concentric tubes in sufficient magnitude to permanently deform the tube into engagement with the plurality of heat transfer promoting fins.

Abstract: Apparatus for cooling liquids, especially lubricating oil for internal combustion engines or heat engines, etc., including a heat exchanger formed by at least one tube for circulating said liquid to be cooled, immersed in a cooling liquid. The exchanger is connected to the outside circuit by connectors passing through the wall of the container of the cooling liquid. These connectors are formed in two parts, one of which projects externally, said parts being so shaped that when assembled they jointly form an annular cavity which surrounds the edge of the opening formed in the container wall; the volume of said cavity diminishes gradually when said two parts are joined together whereby to confine and tighten a flexible seal placed within said cavity.

Abstract: Submerged oil cooler for automotive vehicles requires only two pricipal parts but can provide more heat transfer at a lower pressure drop than conventional oil coolers which utilize three principal parts. In a preferred embodiment, an outer tube having a helically corrugated surface is hand press fit over an inner tube having an outer surface which is helically finned and has rows of longitudinal grooves formed in the fins. The tubes are sealed at their ends so as to define an extended annular flow channel for oil between the tubes, while permitting engine coolant in which the cooler is submerged to flow through the inner tube. In a modified arrangement, longitudinally milled slots are substituted for the formed grooves.

Abstract: A heat exchanger for a nuclear reactor of the cavern type comprises a double walled vessel disposed within a steel liner. The vessel contains a large number of reaction tubes provided with a catalyst through which the material to be reformed flows. The outlet pipes of the reaction tubes act as a heat exchanger in the outer space of the vessel, which is filled with water. The vessel rests upon a bracket on the lower part of the liner, and the space between the liner and vessel in the region of the bracket is sealed by a double flange structure. At the top of the vessel, seal is effected by a cover, membrane ring, and a double flange arrangement. The annular space between the liner and vessel is sealed by a packing against the recycle gas nozzle leading from the interior of the vessel.

Abstract: A heat exchanger core comprises a plurality of high conductivity expanded metal plates interleaved with a plurality of low conductivity separators configured and aligned to provide mutually isolated fluid flow channels across the expanded metal plates.

Abstract: Submerged oil cooler for automotive vehicles requires only two principal parts but can provide more heat transfer at a lower pressure drop than conventional oil coolers which utilize three principal parts. In a preferred embodiment, an outer tube having a plurality of longitudinal flutes which are periodically transversely indented is press fit over an inner tube having a helically finned outer surface. The tubes are sealed at their ends so as to define an extended annular flow channel for oil between the tubes, while permitting engine coolant in which the cooler is submerged to flow through the inner tube. A modified arrangement substitutes corrugated tube for the finned inner tube with a resulting cost saving in material but with a small increase in pressure drop and a small loss in heat transfer efficiency.

Abstract: A heat exchanger including concentric cylindrical elements having fins formed on adjacent surfaces of the cylinders which form a flow passage for polymer. The fins are separated by a series of spaced left-hand and spaced right-hand helical grooves circumferentially around the adjacent surfaces of the cylinders. The left-hand grooves differ in width from the right-hand grooves to promote mixing and improve heat transfer efficiency.

Abstract: A method and apparatus for continuous mixing of blood plasma with additives, such as alcohol, comprises an elongated cylindrical chamber with inner and outer coolant chambers disposed adjacent thereto with an intermediate product chamber containing an impeller. Plasma and at least one additive are introduced into the product chamber in the vicinity of the impeller which mixes the blood plasma and additives. The blood plasma and additives then flow through the product chamber where they are cooled by a refrigerant flowing in the inner and outer cooling chambers. The mixed and cooled blood plasma and additives then flow from an outlet in the product chamber. A method is disclosed of continuously supplying a flow of blood plasma and desired additives in predetermined proportions and mixing and cooling the continuous flow of the combined blood plasma and additives.

Abstract: An improved header construction for a heat transfer apparatus of the type utilizing a plurality of concentric, longitudinally extending tubes including an inner tube, an intermediate tube and an outer tube with the intermediate tube extending beyond the outer tube and the inner tube extending beyond the intermediate tube. The header includes sealing members for the intermediate and outer tubes. Each sealing member is butt welded at one end to its associated tube. The other end of the sealing members defines a radially inwardly directed sanitary radius which is welded to an outwardly directed sanitary radius formed in a band which, in turn, is welded to the next innermost tube section. The method of assembling a header in accordance with the above is also provided.