Abstract: A heat exchanging wall including a base member made of a material comprising graphite as its principal component and a resin as a binder, and a thin outer coat member made of similar material as the material for the base member and applied to one surface of the base member. The material for the base member is cast in a mold having a finely ribbed inner wall surface so that the base member may be formed in such one surface thereof with fine linear grooves. Portions of the thin outer coat member corresponding in position to the grooves in such one surface of the base member are formed with a multitude of small apertures. The heat exchanging wall constructed as aforementioned has high corrosion-resistant characteristics and high heat transfer capabilities, so that the wall is resistant to all corrosive fluids.

Abstract: A weldment heat exchanger having at least the surfaces contacted by the fluids between which heat is exchanged of stainless steel and comprising a tube bundle having spaced tubes through which one of the fluids flows and over the outer surfaces of which tubes a second fluid flows for exchange of heat between the fluids through the walls of the tubes, a first header-tank at one end of the bundle and a second header-tank at the opposite end of the bundle, the joints of the parts including those of the two header-tanks and the tubes being welded.

Abstract: The plate-like structure is formed of glass filaments and a solid ceramic skin which envelopes the glass filaments to form a skeleton-like supporting structure. The glass filaments are also fused to each other at intersecting points to impart stability to the structure.The method of making the structure includes the steps of forming a coating of a ceramic substance which is capable of being fired on a flat structure of glass filaments. Subsequently, the coated structure is fired at a temperature in a range from 600.degree. C. to 1500.degree. C. to form a solid skin of the ceramic substance while causing the glass filaments to fuse together at the intersecting points of contact.Packings for material and heat exchange processes can be made from the plate-like structures.

Abstract: The installation for heating liquid and gaseous media comprises at least one heating unit which consists of an insulating body whose external surface is coated with a conducting film. The heating unit is made as a combination of variable-section containers interconnected in series. Buses are used for delivering electric voltage to the conducting film.The installation according to the invention increases the efficiency of heating extra-pure liquid and gaseous media three to four times, reduces the consumption of electric power three to four times and requires only a small amount of costly metals for its manufacture.

Abstract: Thin liners and tubes of special metals and alloys such as tantalum bonded to substrates or mounted in support plates of metallurgically dissimilar metals and alloys such as mild steel by an elastomer such as a silicone or fluoro elastomer. Also a shock absorbent mounting of tubes telescoped into heat exchanger tubes of special metals by elastomer cushions interposed between the tubes.

Abstract: Impervious graphite tubes, rings and other chemical processing structures made from impervious graphite can be improved with respect to impact strength, safety, shock resistance, pressure capability and heat transfer capability by partially thermally degrading impervious graphite structures and coating the outer surfaces of the treated graphite structures with a layer of metal at an elevated temperature. Upon cooling, the structure is under compression and has the improved properties. Structures are claimed comprising metal armored, partially thermally degraded impervious graphite.

Abstract: Heat transfer surface of cooling water systems and boilers are made resistant to the deposition of adherent scale by coating with plasma-polymerized fluoroethylene monomer.

Abstract: A recuperator having refractory walls has ceramic recuperator tubes which are located at each of their ends in tapering bores in the recuperator walls. The ends of the tubes are sealed in the bores in the walls by a number of precompressed fibrous refractory rings of different diameter which are in turn held in place and prevented from expanding by refractory locking rings that engage the sidewalls of the bores through a bayonet fitting. Ceramic inserts may be provided in the recuperator walls to form the bores. Buffer rings are provided between the locking rings and the tube ends, and a thrust washer is provided between the fibrous rings and the locking rings.

Abstract: A low cost, preformed, synthetic resin, indirect air cooled atmospheric heat exchanger especially adapted for use in water cooling towers is provided which exhibits enhanced water cooling properties notwithstanding fabrication thereof from relatively inexpensive, corrosion-free polyvinyl chloride or like materials heretofore thought to have insufficient heat conductivity for practical use in heat exchangers.

Abstract: An evaporator adapted to convert a liquified gas, such as chlorine, into a gas, the evaporator including an enclosed vapor chamber functioning as a pressure vessel. The vapor chamber is suspended within a water chamber having a heater serving to raise the temperature of the water to a level at which heat transfer through the wall of the vapor chamber causes the liquified gas fed therein through an inlet pipe to evaporate and produce a superheated gas that is discharged through an outlet pipe. The vapor chamber is fabricated of a steel tank whose outer surface is coated with a film of tetrafluoroethylene having a thickness just sufficient to render the film impermeable to water, thereby inhibiting corrosion of the steel surface and the formation of scale thereon, the thickness of the film being insufficient to materially reduce the heat transfer characteristics of the vapor chamber.

Abstract: A fluid-fluid heat exchanger comprises a plurality of flexible synthetic tubes extending in a curved path between a pair of headers with the tubes being maintained in a plurality of spaced apart superimposed layers by a plurality of spaced apart generally radially disposed spacers.

Abstract: A heat transfer element having a plurality of parallel channels is formed from at least two interconnected metal foils or sheets, at least one of which is corrugated and at least one of which is flat, wherein the surfaces of the foils or sheets facing each other are coated with a weldable or sealable plastic or lacquer layer and are bonded to each other by means of these layers in their respective contact zones.

Abstract: Improved heat transfer is obtained between a solid and a fluid by using polycrystalline metal whiskers attached to the solid member which comes in contact with the fluid.

Abstract: A multi-element radiator of plastic material wherein the elements are closed of a plurality of vertical water pipes which discharge at their upper and lower ends into cylindrical tube sections and the end-faces of adjacent tube sections are connected to form the upper and lower horizontal collecting channels.

Abstract: Diffusion-alloying of aluminum into copper brazed joints and structures, particularly for turbine engine regenerator cores.

Abstract: A high efficiency liquid-liquid heat exchanger is made by imbedding 1 mill polyester plastic film in a mass of quartz pebbles. The quartz pebbles are 0.125 to 0.25 inches in diameter and are placed in 0.25 to 0.5 inches thick layers between the plastic sheets. The two liquids flow on alternate sides of the sheets and the flows of the liquids are given a 90.degree. angular spiral flow in relation to each other by strips of plastic cemented between the sheets. In this way a stream tube, or small division of the main flow of one of the liquids, is heated by short elements of a large number of stream tubes of the other liquid and the effects of uneven placement of the pebbles and the resulting channeling of the liquids are overcome. Heat transfer coefficients as high as several hundred BTU's per degree Fahrenheit per hour per square foot of plastic surface have been easily obtained with very low pressure drops. The plastic sheets and quartz pebbles are very cheap and the heat exchanger is easily assembled.