Abstract: A system and method for controlling the temperature of the contents of storage vessels integral with an automotive transport power system, which includes a fluid-cooled internal combustion engine, is provided. A portion of the engine coolant fluid is circulated from the engine through one or more heat-exchange pipe coils, each located within a storage vessel carrying diesel fuel, compressed air, hydraulic oil, or the like, for use in automotive transport, to maintain a selected operating temperature in response to a temperature sensor. An auxiliary heating and pumping system is provided for use when the transport system is not in operation. The control system is particularly useful whenever the atmospheric temperature is high (above 90.degree. F.) or low (below 35.degree. F.).

Abstract: A heat exchanger having an outer shell member and having a helically wound volute member which is double walled and includes a finned outer tube and a close-fitting inner tube, and the heat exchanger further including a core member which extends through the helical volute member and closes its central aperture to confine the flow of liquid in the outer shell member to flow through the fins, rather than pass through the aperture through the center of the helical volute member. The fins on the double walled volute member are wound as close to touching the core member as possible and the diameter of the core member and of the outer shell member is such that the fins closely fit the space between them. Both the finned tube and the inner tube pass completely through the shell member, and the finned outer tube is soldered to the shell so that any leakage between the tubes will pass outside the heat exchanger shell member rather than mixing the heat exchanger liquids.

Abstract: A counterflow heat exchanger comprises coaxial upper and lower tube plates wherebetween extends a tube nest including a plurality of tubes laid parallel to the exchanger axis. The tubes are distributed in a substantially polar symmetry arrangement and have the terminating portion of at least one end thereof substantially perpendicular to the exchanger axis, while the rectilinear portion of the tube nest, which constitutes the heat exchange zone, is enclosed within an annular interspace defined between an inner jacket and an outer shroud.

Abstract: A heat exchanger having an outer shell which is long as compared with its diameter and having a helical double-walled finned volute member which is wound to a small diameter around a core member, the proportions being such that the fins on the double-walled member touch the core on the inside of the wound convolutions and touch the shell on the outside of the wound convolutions. The tube which comprises the outer wall of the double-walled member extends through the shell so that any leakage into the space between the inner and outer tubes of the double-walled tube member will be discharged outside of the shell. The process by which the exchanger is made includes the steps of inserting an inner tube in a length of finned outer tube, winding them into a volute member, inserting a central core member therein, installing these members in a shell member and spinning the shell member closed to seal with the ends of the outer tubing of the volute member.

Abstract: A heat exchanger having an outer shell which is long as compared with its diameter and having a helical double-walled finned volute member which is wound to a small diameter around a core member, the proportions being such that the fins on the double-walled member touch the core on the inside of the wound convolutions and touch the shell on the outside of the wound convolutions. The tube which comprises the outer wall of the double-walled member extends through the shell so that any leakage into the space between the inner and outer tubes of the double-walled tube member will be discharged outside of the shell. The process by which the exchanger is made includes the steps of inserting an inner tube in a length of finned outer tube, winding them into a volute member, inserting a central core member therein, installing these members in a shell member and spinning the shell member closed to seal with the ends of the outer tubing of the volute member.

Abstract: In an apparatus for a treatment of flowing media which causes heat exchange and mixing internal fittings are located within a housing, which internal fittings consist of tubes extending in the axial direction of the housing, each such tube containing a plurality of elbow-shaped tube portions connected by other tube portions, said tubes being arranged in parallel to one another with the connecting tube portions of adjacent tubes crossing one another.

Abstract: A solar liquid-to-liquid heat exchanger, method of making the same, and hot water heating apparatus employing same are provided wherein such heat exchanger is comprised of a first tubular member made of a heat conductive tube material and having a plurality of turns, a second tubular member made of a heat conductive tube material and having a plurality of turns which correspond to and are fixed against the turns of the first member to provide a strong mechanical and thermal connection between immediately adjacent faces of associated member turns. The fixing of the turns of the members and utilization of the heat exchanger in a hot water heating apparatus with flow of a solar fluid used in such apparatus in one direction through the first tubular member and water to be heated through the second tubular member in counterflow to the one direction assures optimum transfer of heat from the solar fluid to the water to be heated.

Abstract: A series of tubes wound in spiral, spaced relation in pressure contact with the next inner tube or a central cylinder to form, between them, a spiral path for one liquid flowing upwardly in the space between the tubes, while another liquid flows downwardly in the tubes. The outermost tube may be enclosed by a sheath in pressure contact therewith, while several sets of tubes, separated by corresponding sheaths, may be utilized. The diameter of the tubes may be varied for the sets to compensate for the greater length of tubes at an outer position, so that an approximately equal time of travel from one end of the tubes to the opposite ends may be obtained. The spacing between the successive turns of the coils is preferably a distance corresponding to one half the diameter of the tubes.

Abstract: A pipe spiral bundle for a heat exchanger is produced by using pre-fabricated pipe spirals of the same shape, each pipe spirals having pipe loops essentially in one plane and at distances inside each other, such spirals being arranged concentrically and directly on top of each other and then tightly attached to each other so as to form a continuous spiral-shaped contact line between adjacent spirals, and a mutual branch pipe being connected to one end of each pipe spiral and a mutual collector pipe being connected to the opposite end of each pipe spiral. The pipe spirals may be heat welded to each other or connected to each other by mechanical binding members, such as metal bands.

Abstract: For a shower for a household, dormitory or the like, which typically has a limited volume of boiler-heated water available for use, the cold water input to the shower is passed in heat exchange with the discharging tepid water to thereby convert same to a lukewarm water source, the temperature change being typically a 15 to 25 degree rise, whereby significantly less boiler-heated water is required for preparing a suitable tepid water mixture confortable for showering. The aforesaid significantly prolongs the showering service use of the system and, since less boiler-heated water is consumed, correspondingly lessens the fuel consumption of the boiler.

Abstract: The retort chamber for generating gas by applying hot steam to coal in a fluidized bed is heated by meandering tubes, dipping into the bed, and being suspended from long, hollow boxes which, in turn, are particularly suspended in the retort chamber. The boxes support also manifold tubes connected to the heating tubes and being further connected to a heating fluid feed and distribution as well as a collecting and discharge system.

Abstract: A solar energy collector 16 for utilizing the energy of the sun to heat a working fluid. The collector comprises a core conduit 30 having a working fluid inlet end 32 and a closure 38 fitted across the other end. A single return conduit 42 is spirally wound upon the exterior surface of the core conduit, wherein the windings are in close lateral juxtaposition but with the return conduit and the core conduit both exposed to direct impingement of solar rays. A transparent tube 48 coaxially surrounds the core conduit 30. Annular members 52 and 54 are positioned at each end of the transparent tube 48 to maintain the spatial relationship of the members and form an annular air insulation zone around the core conduit 30 and return conduit 42.

Abstract: A solar water tank for use in solar heating systems includes an insulated tank with flow systems comprised of a plurality of inlet and outlet tubes, heat exchangers, level switch and supplemental heating element, all assembled together with the manway cover for the tank in a unitary embodiment. The tank also includes a layer of polyurethane foam insulation on its interior surface. Forming apparatus for placing the insulation layer in the tank includes a flexible synthetic membrane in the form of an enclosed bag adapted for positioning in the interior of the tank.

Abstract: While many materials and additives which will melt and freeze at various temperature levels for storing and releasing large amounts of heat thereby per unit volume have been disclosed, the packaging of these materials with suitable non-corrodible long-lasting heat exchange structures has been cumbersome and expensive. The present invention provides an inexpensive, high performance, non-corrodible thermal storage method and system adapted for use with heat storage materials of various compositions and adapted for use over a wide range of temperatures, including a heat exchanger which provides for phase change to occur approximately simultaneously throughout the volume of the entire storage mass and provides for the sites at which the phase change is occurring to be approximately uniformly distributed throughout the volume of the heat storage material. Problems of thermal expansion, stratification and sub-cooling are eliminated.

Abstract: A heat exchanger for fluids is disclosed in the form of a cold plate of the type utilized with ice cooled beverage dispensers. The cold plate has a heat conducting casting in which are embedded conduits for various liquids to be cooled, such as various flavored syrups, sweet water and carbonated water. One of the fluid conduits, such as that for the carbonated water, is formed of two tubular members, with a third tubular member interconnecting the first two tubular members. The first two tubular members are substantially planar with a convoluted or serpentine shape. The two tubular members are positioned as two layers, with the top layer or first tubular member adjacent to the top surface of the casting against which the ice is positioned.

Abstract: A geothermal energy system in which a bore hole is drilled into the earth to a depth where a predetermined temperature gradient exists between the earth's surface and the bottom of said bore hole. A liquid refrigerant line passes down the bore hole and connects to an evaporator where the geothermal energy is used to vaporize the refrigerant and from there it passes back up through a high pressure gaseous refrigerant return line to a gas operated turbine located at the earth's surface. The spent refrigerant exiting from the turbine is cooled in a condensing unit and recirculated to the subterranean evaporator unit. The turbine may be used to drive a suitable electrical generator for power production purposes.

Abstract: A device for cooling air to a temperature below its dew point and for separating condensed liquid from the cooled air to produce dry air is disclosed.

Abstract: A system and method for controlling the temperature of the contents of storage vessels integral with an automotive transport power system, which includes a fluid-cooled internal combustion engine, is provided. A portion of the engine coolant fluid is circulated from the engine through one or more heat-exchange pipe coils, each located within a storage vessel carrying diesel fuel, compressed air, hydraulic oil, or the like, for use in automotive transport, to maintain a selected operating temperature in response to a temperature sensor. An auxiliary heating and pumping system is provided for use when the transport system is not in operation. The control system is particularly useful whenever the atmospheric temperature is high (above 90.degree. F.) or low (below 35.degree. F.).

Abstract: A U-tube heat exchanger for the heat transfer from a primary gas circuit to a secondary gas circuit in a high temperature reactor. At the high temperatures of approximately 950.degree. C., the additionally permissible stresses on the used materials are low. The cold gas collector is therefore flexibly attached at the housing. The arrangement permits complete and also remote-controlled testing from the secondary gas-side of all parts of the primary gas circuit which are stressed by pressure. The flexible elements are neither stressed by the weight of the heat exchanger nor endangered by high temperatures.

Abstract: A heat-exchanger element of the type consisting of two sandwiched metal sheets, deformed so as to define between themselves a flow channel, has a number of apertures in the portion of the element not deformed. The one heat-exchanging fluid passes through the channel and the other through the apertures, generally in a direction perpendicular to the sandwich interface. In a preferred embodiment the apertures are formed by a punching operation in the way that tongue-like flaps are formed which affect the direction of flow, create turbulence and may serve as means spacing or supporting adjacent elements.

Abstract: In a heat exchanger such as a steam generator for a nuclear reactor, two or more bundles of helically coiled tubes are arranged in series with the tubes in each bundle integrally continuing through the tube bundles arranged in series therewith. Pitch values for the tubing in any pair of tube bundles, taken transverse to the path of the reactor coolant flow about the tubes, are selected as a ratio of two unequal integers to permit efficient operation of each tube bundle while maintaining the various tube bundles of the heat exchanger within a compact envelope. Preferably, the helix angle and tube pitch parallel to the path of coolant flow are constant for all tubes in a single bundle so that the tubes are of approximately the same length within each bundle.

Abstract: A cooling device for use in tubular hot gas conduits which are made up of a plurality of longitudinally arranged side by side abutting pipes includes a plurality of registers arranged in spaced relationship along the length of the pipe and extending into the pipe from one side thereof into closely spaced arrangement in respect to the opposite side. The registers each include a plurality of U-shaped pipes which are interconnected and arranged in the direction of flow and which are connected externally of the hot gas conduit through respective inlet and outlet headers.

Abstract: A vertical steam separator-superheater which has a common casing (1) enclosing a lower separating portion (3) and an upper superheating portion (4). The separator-superheater includes an axial dry steam inlet zone, nests (16, 17) of superheating tubes disposed in envelopes spaced out round the central zone and fixed to a thin flexible casing (30) which is itself fixed to the upper portion of the common casing and an outer superheated steam collection zone (18). The lower portion includes a wet steam inlet chamber (5) and separators grouped in two coaxial truncated pyramide (10, 11).

Abstract: A fluid heat transfer apparatus having an expandable housing defining an enclosed interior space including fluid inlet and outlet manifolds communicating with said interior space and the exterior of said housing. The apparatus including heat transfer modules stackable in said interior space and each module comprising a flat supporting structure including upstanding elongated posts extending from one side thereof and lengths of flexible plastic tubing wound about the posts in basket-weave fashion with the ends of the tubing being connected to said inlet and outlet manifolds to provide conduction of fluid flow from said inlet to said outlet manifold. The housing being expandable to receive pluralities of said modules to selectively increase fluid heat transfer characteristic of said apparatus. The interior space being filled with a heat transfer fluid heated by a controlled heat producing medium such as electric heating elements.

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 special unitary heat exchange unit for safely heating potable water from the waste heat of a number of refrigeration units is formed of a large diameter pipe perhaps 4 to 10 inches in diameter and perhaps 6 to 20 feet in length to extend along a refrigeration rack. The water to be heated is passed through the length of the heat exchanger, which is essentially a cylindrical tank enclosing a number of small double walled coils each constituting a heat exchanger through which freon or other similar refrigeration gas is passed for cooling. The double walled coils include the inner tube which carries freon, and an intermediate buffer zone in which a non-poisonous heat transfer liquid is located.

Abstract: A heat exchanger, reactor or like apparatus capable of carrying out heat exchange, material exchange or combinations thereof, comprises a cylindrical housing formed at one end with a cover and provided internally with a cylindrical partition carried by the cover and reaching toward but terminating short of the opposite end of the housing to subdivide the interior into an inner chamber or space and an outer annular chamber or space. A first fluid is fed to a helical-coil tube bundle in the outer space and then passes into a helical-coil tube bundle in the inner space before being discharged through a manifold and pipe in the cover disposed centrally. The inlet pipe or pipes are also carried by the cover outwardly of the central pipe. The conduits for the second fluid which open into the spaces and which pass around the heat exchanger pipes in these spaces are also carried by the cover and may extend coaxially with the first fluid conduits.

Abstract: A solar collector has a liquid system independent of a household hot water heater system, the two systems transferring heat in a heat exchanger. The heat exchanger has an open top inner tank enclosed in a closed outer tank, a coil connected to the hot water tank system circulates under main pressure in a coil in the annular space between the inner and outer tanks. Liquid from the collector enters at the bottom of the annular space, flows upward around the coil and overflows the top of the inner tank. A pump draws liquid from the bottom of the inner tank for circulation through the solar collector system. The liquid in the collector system drains by gravity into the inner tank at any time that the collector circulating pump is not operating, thus providing freeze protection during all normal operations and also at such time that a power failure may occur.

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 multitubular heat exchanger used as a feedwater heater in a power generating plant and the like includes a shell, a high temperature tube bundle and a low temperature tube bundle composed of a multiplicity of U-shaped heat transfer tubes arranged in the shell and a vent tube interposed between the two tube bundles. A laterally-closed flow passage is defined in at least one of the high temperature tube bundle and the low temperature tube bundle to induce part of a heating medium flowing between the shell and the tube bundle to flow to a position deep in the tube bundle and near the vent tube, so that a noncondensable gas stagnating zone formed in the tube bundle can be moved near to the vent tube and noncondensable gas can be removed from the shell by extraction through the vent tube.

Abstract: A heat exchanger device for use with a solar energy system comprising at least one pair of substantially parallel enlarged heat exchange inlet conduits operatively coupled together within a fluid storage tank to receive heated fluid from an external source to heat fluid within the storage tank and a reduced outlet conduit coupled to the lower portion of the substantially parallel enlarged heat exchange inlet conduits to remove the fluid from the fluid storage tank.

Abstract: Method of manufacturing a heat exchanger element with a plurality of helically wound coils. The tubes are wrapped about a forming drum in a parallel abutting relation to each other to form a plurality of helically wound coils. Terminal leads are provided at each end of the coil. Terminal leads at each end of the coils are bent, disposed one inwardly the other so that they are positioned tangent to the same plane, which is perpendicular to the center longitudinal axis of the coils, and then a portion of each terminal lead is cut off and joined to a header.

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

Abstract: Worm extruder assembly includes an extruder worm, a steam dome formed as a cylindrical tube disposed transversely to the worm axis, a condenser surrounding the cylindrical tube, a steam outlet line extending from the steam dome to the condenser, and means defining an annular gap connecting the condenser to the cylindrical tube.

Abstract: The invention relates to a multiple phase flow tube for evaporating and reacting components in compound mixtures in which a spiral pipe is arranged within a multiple phase flow pipe. The components are propelled by means of an internally flowing gas stream in an annular shaped passage formed by a spiral tube and a second tube arranged as a core of the spiral tube. The second tube contains a heat exchange medium. The spiral tube is arranged within a cylindrical casing which contains a heat exchange medium. A gaseous stream of a reduced amount is then sufficient for carrying out the particular chemical process desired.

Abstract: A novel heat transfer element which permits simple, low-cost conversion of energy inefficient electrically heated water heaters to energy efficient potable-water storage tanks for storing water heated by energy-efficient gas-fired water heating systems.

Abstract: A heat exchanger is provided for use in a blood handling system whereby the blood may be selectively heated or cooled, as required by the nature and stage of the operation. The heat exchanger, in the preferred embodiment, is in the form of a cylindrical housing having walls defining a helical path for the flow of blood through the exchanger and about the axis of the housing. The heat exchanging medium, typically water, flows separately through a conduit in the housing, the walls of which at least partially define the helical blood conduit for heating or cooling the blood flowing therethrough. The heat exchanger is characterized by a controlled route for the blood so as to uniformly expose the blood to the same type of heating or cooling and without creating dead spots in the blood flow. A long path of blood flow is provided in a small package with a highly efficient thermal transfer.

Abstract: An improved steam generator for use in a nuclear power plant of the pressurized water type in which a turbine generator is driven by the steam output of the steam generator to provide electrical power therefrom. The improvement comprises providing a vertically movable grid structure vertically extending within the interior of the lower housing portion of the steam generator through which individual tubes comprising a vertically extending tube bundle extend. The tube bundle has a tube sheet at one end thereof supporting the tube bundle for the tubes extending through the tube sheet in flow through communication with a heat exchange fluid inlet. The grid structure defines grid apertures therein through which the individual tubes extend with each of the grid apertures being in surrounding relationship with a portion of an associated one of the tubes.

Abstract: A multitubular heat exchanger mainly used in thermal and nuclear power plants having a plurality of tube bundles located within a shell and including a large number of U-shaped heat transfer tubes for permitting a medium to be heated to flow therethrough, and a vent tube interposed between the tube bundles and arranged in the longitudinal direction of the shell, further includes at least one flow guide plate with or without at least one slit disposed in or near the outer marginal portion of one of the tube bundles for inducing streams of a heating medium to flow toward the vent tube. The provision of the guide plate with or without the slit has the effect of moving a heating medium stagnating zone, which has hitherto been located in one of the tube bundles, to a position which is in the vicinity of the vent tube to thereby prevent corrosion of the heat transfer tubes by noncondensable gas.

Abstract: A multitubular heat exchanger used in a power plant is provided with a bundle of U-shaped heat transfer tubes and a vent tube. The vent tube is located between an upper portion and a lower portion of the bundle of U-shaped heat transfer tubes. A steam flow guide plate is located above a hole of the vent tube and below the upper portion of the bundle of U-shaped heat transfer tubes. The steam flow guide plate obstruct a downward steam flow from the upper portion of the bundle toward the vent tube.

Abstract: There is provided a heat exchanger apparatus comprising a plurality of mutually identical heat exchanger coils. Each coil has the shape of a cup. The coils are placed in close relationship on both sides of a base plate which blocks a flow channel. The base plate exhibits a plurality of orifices, and a coil is placed over each orifice with its rim in contact with the base plate and surrounding the edge of the orifice, but only one coil is assigned to each orifice. Adjacent coils on opposite sides of the base plate are stagger so that their rims overlap each other without covering any part of the orifice assigned to the adjacent coil on the opposite side of the base plate.

Abstract: A bundle of J-shaped tubes uniformly spaced in radial planes about the axis of a cylindrical shell is provided for the circulation of a primary fluid between on the one hand an inlet header delimited by a central tube plate and by the top dished end of the shell and on the other hand a toric outlet header which is partly delimited by the peripheral tube plate and the shell wall and is located above an annular space between the shell wall and a coaxial inner skirt. At least one nozzle for the supply of secondary fluid in the liquid state opens into the annular space and a lateral chamber is formed within the shell between the primary fluid inlet and outlet headers for collecting the secondary-fluid steam produced in contact with the tubes.

Abstract: A heat exchange system is provided which transfers the heat from a fluid discharged from a device that utilizes a heated fluid, to fresh fluid in order to increase the temperature of the fresh fluid prior to feeding it into a heating tank. Thus, less energy is required to heat the fluid in the heating tank prior to its introduction into the device which utilizes heated fluid. After the heat has been exchanged, the discharged fluid is then expelled from the system. A fluid trap controls the fluid level in the heat exchanger to assure maximum heat transfer capability. An antisiphon valve is provided in the fresh fluid input of the heat exchange coil in order to prevent discharged fluid from contaminating the fresh fluid source in the event of a rupture in the heat exchance coil.

Abstract: There is disclosed a solar water glass lined tank in which a copper tubing heat exchanger coil is installed and connected across inlet and outlet fittings of the tank. The circuit for circulation of a fluid which is to be heated or cooled is connected to these fittings for thermal exchange with fluid in the tank. Legs are secured to the tubing coil by flexible fasteners, such as plastic or plastic coated wire ties, and the tubing coil is installed in the tank prior to welding a head wall in place. The legs are spaced about the coil formation and extend from a sidewall, top-head corner junction of the tank. The legs are preferably of the same metal material as the coil and are cushioned at their ends with rubber or plastic bumpers. The head wall is welded in place and the tank is assembled for shipment and use.

Abstract: In the preheating of a liquid reaction mass of polyolefin dissolved in liquid olefin monomer by passing it through a multiple pass preheater, the improvement of using generally U-shaped heat exchanger tubes in a generally U-shaped shell.

Abstract: A generator for the production of both superheated steam and saturated steam has an outer casing formed by an inner cylindrical shell engaged within an outer cylindrical shell, the shells being closed by dished ends. An annular header for the admission of pressurized primary water is formed between an upper annular tube plate and a partition-wall while an outlet header for the discharge of primary water is formed by a central tube plate mounted within the inner shell. A bundle of parallel tubes for the circulation of primary water extends vertically upward from the central tube plate. The end portion of each tube has the shape of a crook in order to join the tubes to the annular tube plate in uniformly spaced relation. The secondary water is admitted into the casing by means of ducts formed in the inner shell near the central tube plate. The steam generated is discharged through ducts formed in the outer shell.

Abstract: A process of treating an animal manure slurry susceptible to aerobic composting and anaerobic microbiological degradation with the production of a fuel gas, comprises: separating the slurry into a first, solids concentrated, fraction of relatively coarse particle size, and a second, solids dilute, fraction of relatively fine particle size; carrying out on the first fraction an aerobic composting reaction which is exothermic; carrying out on the second fraction an anaerobic microbiological reaction in which a fuel gas comprising methane is produced; and utilizing heat from the exothermic reaction to promote the fuel gas producing reaction.

Abstract: A heat exchanger for cooling system compressed air dehumidifiers includes an inner body forming a dehumidifying passage provided with a cooler, an outer body surrounding the inner body and forming a precooling passage along the outer periphery of the inner body, an air supply port opened in the outer body through which compressed air is led into the precooling passage from one end thereof, a communicating hole opened in the inner body to guide the air led into the precooling passage out through its other end into the dehumidifying passage through one end thereof, and a plurality of heat transmitting pipes extending through the precooling passage in order to form an air-flow passage which guides the compressed air out of the other end of the dehumidifying passage to an air discharge port provided in the outer body.

Abstract: A base plate having a predetermined perimetral configuration supports a planar coil of tubing surrounding a central space and overlying the plate. A core reflector having a reflective surface is fitted within the central space and is attached to the plate centrally thereof. A base of low thermal conductivity has the same configuration as the plate and underlies the plate in congruity therewith. A transparent enclosure defines a dead air space above the coil and has a flange with the same configuration as and overlies said plate. A frame having channel shaped sides slidably receives the edge portions of the contiguous plate, base and enclosure to maintain the edges superposed to provide for an insulated chamber for the coil. The tubing has interiorly thereof a pair of oppositely extending vanes which are spirally configured along the tube length to cause rotation of the fluid moving through the tube so that the fluid will be evenly heated.

Abstract: The heat exchanger is constructed with an axial guide such that the tube bunch can move axially within a cylindrical jacket in order to compensate for vibrations due, for example, to horizontal earthquake waves. Shoes are secured to the support plates to the tube coils and are slideably mounted within elongated slots in the jacket or vice versa. Should a vertical motion occur, the shoes are able to slide within the slots while the tube coils and their support plates remain supported within the jacket.