Abstract: In a double-pipe heat exchanger for cooling cracked gas, the double pipes are inserted in rows into oval pipe collectors (3), and several oval pipe collectors (3), arranged parallel to each other, are joined into a tight floor (5) which forms the upper cap of the gas entry cone. The floor (5) has a cylindrical flange collar (6) fastened to it, which is connected to a ring flange (9) attached to the gas entry cone. The gas entry cone is provided on the inside with a lining (11) whose inner contour (13) forms a central interior space (12) which widens in the direction of the floor (5). This lining (11) of the gas entry cone continues into the flange collar (6), and the inner contour (13) of the lining (11) continues all the way to the floor (5).

Abstract: A system for stripping an optical fiber includes a source air, and means for generating very short bursts of air. A heater heats the bursts of air to a temperature sufficient to remove the outer coating from an optical fiber, while maintaining the air isolated from the heat source. The heater includes a heater core that includes a heat generating element such as a conductive filament, and a heat chamber enclosed within the heater core. A spiral-shaped air conduit surrounds the outer surface of the heater core, and communicates with the heat chamber. Upon injection of air into the conduit, heat is transferred to the air from the heat generating element while the air flows through the air conduit and into and out of the chamber. A single burst of heated air removes the outer coating of an optical fiber, within less than one second.

Abstract: A precooler for use in a fuel cell system between a thermal reformer and a shift converter includes an atomizing water inlet in combination with a swirling inducing reformed gas inlet which act to increase the resistance time of the reformed gas in the precooler so as to effectively cool same.

Abstract: An annular flow concentric tube heat exchanger for heating two counter flowing fluid streams has been devised. Although capable of heating gases or liquids, the primary purpose of the invention is to function as an improved recuperator for recovering exhaust heat from a Brayton Cycle gas turbine engine, Ericsson Cycle engine or similar recuperated engine. The basic element of the recuperator is a concentric tube assembly that, in the preferred embodiment, is comprised of four concentric tubes that enclose three concentric annular flow passages. The low pressure exhaust flows through the inner and outer annular passages while the high pressure compressor exit air flows through the annular passage that is between the two low pressure passages. The high and low pressure flows are in opposite directions to achieve the high effectiveness that is only available with a counterflow heat exchanger.

Abstract: The heat exchanger of the present invention is capable of easily adjusting temperature of a machining liquid, e.g., slurry, etching liquid. The heat exchanger of the present invention, which adjusts temperature of the machining liquid, comprises a ceramic heat exchanging tube, which is made by baking silicon carbide (SiC).

Abstract: A device for cooling gases in which the gas to be cooled can be fed through channels (5) of a cooling device (1). Adjacent the gas channels (5) in the cooling device (1) are coolant channels (10) for a circulating coolant. In the cooling device, the channels (10) for the coolant are positioned centrally in the interior and the channels (5) for the gas to be cooled are positioned radially outwardly.

Abstract: A combined component consists of a heat exchanger and of a reactor. The heat exchanger is designed in a plate form, and flow spaces for a first medium and a second medium are alternately between successive plates. The plates of the heat exchanger are configured as essentially annularly. The heat exchanger has, substantially perpendicularly to the plates, a tubular outer wall and a tubular inner wall. The reactor is surrounded by the inner wall of the heat exchanger. The product of the reactor is conducted through supply orifices on the inner wall of the heat exchanger into the flow spaces for one of the two fluids in the heat exchanger.

Abstract: A heat engine is constructed from sheet metal and the like. The heat engine has an outer container and inner container which contains a displacer and a power piston. A plurality of positioning members are provided to dimensionally stabilize the inner and outer containers. By providing positioning members that extend between the inner and the outer containers, a sandwiched construction is obtained which allows the inner and outer containers to reinforce each other thus permitting the use of thin walled containers and improving the thermal efficiency of the heat engine and decreasing the weight of the heat engine.

Abstract: An arrangement for cooling the temperature of a source of air prior to introduction into a motor vehicle engine includes an intercooler core and an intercooler housing. The intercooler core has a generally cylindrical shape. The intercooler housing defines an inner chamber receiving the intercooler core. The intercooler housing has an intake side with at least one intake port in communication with the intercooler core and an outlet side with at least one outlet port in communication with the intercooler core. The intake side and the outlet side are spaced apart and parallel.

Abstract: A cryogenic heat exchanger has a pair of coaxial conduits. A pressurized refrigerant gas is passed through the internal conduit, out a thermal expansion valve and back through the annular space between the conduits. The closed end of the outer conduit is chilled by the expansion of the pressurized gas. The cryogenic effect is enhanced by precooling the pressurized warm gas with the depressurized cool return gas. A plurality of porous rings and disks bridging the lumen of the interior conduit and the annular space between the conduits assist in radial heat transfer to accomplish the desired precooling. The material chosen for the rings and disks is preferably highly porous, such as sintered metal, to increase the surface contact area and thereby increase heat transfer efficiency.

Abstract: An oil cooler has a tube disposed in a cooling water passage and defining an oil passage therein, an oil side inner fin brazed to an inside wall of the tube in the oil passage, and a water side inner fin brazed to an outside wall of the tube in the cooling water passage. The thickness Tw of the water side inner fin is thicker than the thickness To of the oil side inner fin. The water side and oil side inner fins are corrugated fins.

Abstract: A fluid delivery system For delivering a process fluid to a vacuum processing system includes a secondary containment line surrounding a process fluid line. A purge gas flows through the secondary containment line and around the process fluid line in order to flow away any leaked process fluid. Alternatively, a heated fluid flows through the secondary containment line forming a heat trace around the process fluid line to heat the process fluid line and the process fluid by means of convection, which provides for precise uniformity of temperature throughout the length of the secondary containment line. The heated fluid loses heat to the ambient environment creating a temperature gradient through which the process fluid flows. The secondary containment line may have a heating element along its length for adding heat to the heated fluid to change the temperature gradient.

Abstract: A fluid-to-fluid heat exchanger for use where two fluid streams may be of indeterminate composition, temperature, and flow rate, and, where the two fluid streams may flow at different rates and at different times. Such conditions are found, for example, in the flow patterns of a building's hotwater, cold feed water for a water heater, and drainwater. As defined for heat recovery from drainwater, the present invention comprises a first, central, straight-through heat exchanger tube for cooling flowing drainwater, a second heat exchanger to heat cold water encircling and spaced from the first, and a non-pressurized reservoir between first and second heat exchangers permanently filled with water in thermal contact with first and second heat exchangers. Submerged in the reservoir water there is at least one insulated convection chamber, of small volume, enclosing first heat exchanger with a convection opening uppermost.

Abstract: In a device for placing a structural element in a cable installation conduit in order to sub-divide it, the structural element has a width close to the size of the internal perimeter of the conduit and comprises a plate surmounted by ribs. The device comprises a hot air inlet designed to soften the plate of the structural element; an external cylinder whose diameter is identical to that of the conduit, the cylinder comprising a shaping cone at one end in order to enable the softened structural element in order to gradually take a cylindrical shape; and an internal core fixedly held at a position located in the shaping cone of the external cylinder and positioned inside the softened structural element in order to give it a constant internal diameter when it is being shaped.

Abstract: A readily replaceable heat exchange cooling jacket for applying fluid to a system conduit pipe. The cooling jacket comprises at least two members, separable into upper and lower portions. A chamber is formed between the conduit pipe and cooling jacket once the members are positioned about the pipe. The upper portion includes a fluid spray means positioned above the pipe and the bottom portion includes a fluid removal means. The heat exchange cooling jacket is adaptable with a drain tank, a heat exchanger, a pump and other standard equipment to provide a system for removing heat from a pipe.

Abstract: A heat-exchanger tube has an inner tube wall centered on an axis, formed with an outwardly projecting helical ridge having a helical outer surface, and forming an outwardly open helical groove delimited by the ridge and an outer tube wall centered on an axis, formed with an inwardly projecting helical ridge of the same hand as the inner-tube ridge, having a helical inner surface, and forming an inwardly open helical groove delimited by the outer-tube ridge. The inner tube is coaxially received in the outer tube with the grooves together forming a helical passage having a plurality of turns and the surfaces radially confronting and spaced from each other to form an axial passage for fluid communication between adjacent turns of the helical passage. A fluid is fed to one end of the helical passage and withdrawn from an opposite end with flow of the fluid helically along the helical passage and axially through the axial passage.

Abstract: The invention relates to a combined heat exchanger and fluid filter that can be used in a gas turbine engine for example to simultaneously filter lubricating oil and fuel while transferring thermal energy between the oil and fuel. Conventionally, fuel and oil filters as well as a heat exchanger are separately mounted in an engine with a multitude of pipes conducting fluids between them. The invention packages these components together and achieves several benefits as a results, including: reduction in number of parts, cost of manufacture and installation; containment of the risk of damage or leakage; ease of access for assembly, inspection and maintenance; and simple application to a number of different engines by merely extending the length of the filters/exchanger on a standard manifold design.

Abstract: According to the present invention, a first tube is constructed by connecting a plate material into a tubular shape. In the manufacturing process, after an inner fin is disposed around an outer wall of a second tube, the first tube is disposed around the second tube, and the first tube and the second tube are fixed by connecting the plate material in such a manner that the inner fin is in contact with the both tubes. In this way, the inner fin and both tubes are certainly contacted closely to each other without enlarging the second tube.

Abstract: Computer simulation was used in the development of an inward-burning, radial matrix gas burner and heat pipe heat exchanger. The burner and exchanger can be used to heat a Stirling engine on cloudy days when a solar dish, the normal source of heat, cannot be used. Geometrical requirements of the application forced the use of the inward burning approach, which presents difficulty in achieving a good flow distribution and air/fuel mixing. The present invention solved the problem by providing a plenum with just the right properties, which include good flow distribution and good air/fuel mixing with minimum residence time. CFD simulations were also used to help design the primary heat exchanger needed for this application which includes a plurality of pins emanating from the heat pipe. The system uses multiple inlet ports, an extended distance from the fuel inlet to the burner matrix, flow divider vanes, and a ring-shaped, porous grid to obtain a high-temperature uniform-heat radial burner.

Abstract: A sample conditioning apparatus that removes moisture from a saturated gaseous sample and that utilizes the removed moisture for evaporative cooling within the apparatus is described. The sample conditioning apparatus includes a heat exchanger, a condensate drain trap, and a bypass line that directs a portion of the sample to a cooling medium inlet of the heat exchanger. The apparatus also includes a direction changing fitting to direct the condensate from the heat exchanger into a condensate drain trap. The direction changing fitting is coupled to a sample outlet of the heat exchanger and to the condensate drain trap. The direction changing fitting is also coupled to a membrane type moisture separator to prevent any liquid carrying over through to the gas analyzers. The moisture separator is also coupled to a first end of a bypass line, and to a sample line extending between the separator to the gas analyzers.

Abstract: A fluid temperature control device is improved to be simpler in structure, less in fluid temperature non-uniformity, and able to heat a fluid having a small light absorbability. The fluid temperature control device has a cylindrical inner vessel (20), a cylindrical outer vessel (22) surrounding the inner vessel (20), and a heating lamp (25) inserted into the inner vessel (20). Metal fins (28a) and (28b) are provided on the inner and outer circumferential surfaces of the inner vessel (20). A working fluid is passed through the inner space (21) between the inner vessel (20) and the heating lamp (25), and a cooling liquid is passed through the outer space (23) between the inner vessel (20) and the outer vessel (22). Infrared rays from the heating lamp (25) heat the working fluid, and the cooling liquid cools the working fluid. This device is applicable to, for instance, temperature control of plural process chambers of semiconductor processing apparatus.

Abstract: A heat exchanger (2) for cooling a hot process gas produced in a process gas generator (1) or a reactor is equipped with several cooling tubes (11), each of which is surrounded by an outer tube (12). Each cooling tube (11) and each outer tube (12) is welded at both ends to one water chamber (13, 14) each for feeding and draining of a cooling medium. The water chamber (13, 14) consists of a solid, strip-shaped piece into which, depending on the number of cooling tubes (11), circular wells (15) are introduced at a certain distance from one another. Each well (15) surrounds a cooling tube (11) and has a diameter equal to or larger than the inside diameter of the outer tube (12). The well (15) has a thin circular floor (16) of slight residual thickness in the area of the tube ends of the cooling tubes (11). A horizontal transfer line (4) carrying the hot process gas is connected to the the process gas generator (1).

Abstract: A heat-exchanger unit (13) for recovering heat from the flue gases from a cylinder steam boiler (10), said heat exchanger unit comprising a flue-gas tube (14) and a heat-exchanging tube (16) which is supported concentrically inside the flue-gas tube (14) by a bent inlet pipe (19) extending from a lower opening (20) in the peripheral wall of the flue-gas tube (14) to an inlet opening (21) in a lower outwardly bulging end wall (22) of the heat-exchanging tube (16), and an outlet pipe (23) extending from an outlet opening (24) in an upper part of the peripheral wall of the heat-exchanging tube (16) to an upper opening (25) in the peripheral wall of the flue-gas tube (14). The inlet pipe (19) has a first, horizontal, straight end portion (19A), a second, upwardly directed, straight end portion (19B) and also an intermediate, curved portion (19C). The bending angle (.alpha.) of the curved portion exceeds 90.degree. and the other end portion (19B) extends with an inclination determined by said bending angle (.

Abstract: A liquid desiccant dehumidifier includes a liquid desiccant absorber arranged to receive concentrated liquid desiccant and absorb moisture contained in ambient air passed through the absorber thereby diluting the liquid desiccant. A first heat exchanger is operative to heat dilute liquid desiccant received from the desiccant absorber prior to passage to a boiler that evaporates moisture from the diluted liquid desiccant to create steam and reconstitute the desiccant into a concentrated liquid desiccant. Dilute liquid desiccant from the first heat exchanger first passes to a condenser that receives steam from the boiler and sensibly heats the dilute liquid desiccant to a higher second temperature without direct exposure to steam or air.

Abstract: A liquid desiccant dehumidifier includes a liquid desiccant absorber arranged to receive concentrated liquid desiccant and absorb moisture contained in ambient air passed through the absorber thereby diluting the liquid desiccant. A first heat exchanger is operative to heat dilute liquid desiccant received from the desiccant absorber prior to passage to a boiler that evaporates moisture from the diluted liquid desiccant to create steam and reconstitute the desiccant into a concentrated liquid desiccant. Dilute liquid desiccant from the first heat exchanger first passes to a condenser that receives steam from the boiler and sensibly heats the dilute liquid desiccant to a higher second temperature without direct exposure to steam or air.

Abstract: An outdoor equipment cabinet enclosure designed to effectively dissipate heat generated by electrical equipment components housed therein includes a main interior section for housing active electronic components and a lower section configured to store banks of batteries for a stand-by power supply system with a lower wall separating the batteries from the electronic components in the main interior section. At least one heat exchanger is disposed in the main interior section and includes an inlet port and means for creating a circulating air flow path for interior air within the main interior section. An outdoor air flow path is defined by the lower wall and the upper surfaces of the batteries and at least one baffle is disposed within the outdoor air flow path which is configured to deflect outdoor air flowing across the upper surfaces of the batteries into the at least one heat exchanger.

Abstract: In a heat exchanger having a coaxial pipe, the coaxial pipe is formed by integrating an inner pipe, an outer pipe and connecting walls together by an extruding or a drawing forming process. A header of a first connecting member is connected to a removed portion formed by removing a part of the outer pipe at an end portion of the coaxial pipe. A second connecting member is welded to the inner pipe at a more longitudinal end side of the inner pipe than the header. Thus, the coaxial pipe can be bent like a coil for downsizing the heat exchanger without reducing the heat-exchanging ability of the heat exchanger, and the total cost of manufacturing the heat exchanger can be reduced.

Abstract: The heat exchanger consists of at least partially connected fins, which run obliquely with respect to one another, and are disposed in a hollow-cylindrical fashion. The sides connecting the fins at their ends form the surfaces of the hollow cylinder. The heat exchanger is disposed between the extruder barrel and the band-shaped, flexible heating element of the heating and cooling configuration. Good heat exchange results, i.e. a quick heating up and cooling down of the extruder barrel and a homogeneous temperature distribution on the extruder barrel. The heat exchangers can be disposed in a row.

Abstract: In a method and evaporator device for evaporating a low temperature liquid medium, such as hydrogen for example, the hydrogen is first evaporated and at least partially superheated in a forward-flowing first channel, and is then directed to flow back in the opposite direction in a second return-flowing channel. The second channel is especially interposed between the first channel and a passage through which flows a heat-providing medium such as a hot exhaust gas. Thus, the superheated hydrogen flowing in the second channel serves as an intermediate layer for heat transfer from the heat-providing medium through the hydrogen in the second channel to the low temperature, initially liquid hydrogen in the first channel. The heat exchange surfaces in contact with the heat-providing medium are not directly adjacent the extremely cold surfaces in contact with the in-flowing low temperature liquid hydrogen, and the superheated hydrogen acts as a buffer between the hot side and the cold side of the evaporator.

Abstract: An environmentally adaptable exterior heat exchange unit with a pot like base and a vertical component extending from the base. An artificial plant is incorporated into the structure to blend the unit with its environmental surroundings. The unit could resemble a fir tree, a shrub, a bush, a tree or the like. A compressor and condensing coil are located within the base which will reduce noise levels and increase efficiency of heat exchange. A set of vertically extending heat exchange coils circulate a second coolant and extend upward from the base and can be moved relative to the base without disturbing coolant flow or the components housed within the base. The unit can be operated with the lid off and mainatin refrigerant and coolant circulation. The refrigerant coil is run within the coolant coil in a tube-in-tube arrangement within the base to enhance heat exchange. The coolant tubes then carry the heat outside the base.

Abstract: A method for forming a solar collector includes a panel provided with an inner bore and a deformable metal tube inserted in the bore and mechanically secured thereto by passing a plug or bullet through the tube to deform it outwardly into intimate contact with the panel such as to maximize the heat transfer therebetween and to substantially eliminate any possibility of corrosion by keeping the tube in constant compression. The tube can carry a liquid, such as water or glycol, which is heated by the panel exposed to radiant solar heat. The so formed solar collector typically uses a copper tube and an extruded aluminum panel. A number of parallel conduits connected at their opposite ends to common main inlet and outlet copper pipes may be provided with the panels of adjacent conduits mating together while allowing for relative movement therebetween but without the forming of gaps therebetween.

Abstract: A heat exchanger element comprises an outer tube (11), an inner tube (12) within the outer tube and a first fluid flow path for a first heat exchange fluid formed between the inner and outer tubes. A second heat exchange fluid is in heat transfer relation to the outer surface of the outer tube and/or the inner surface of the inner tube. A sleeve (13) is provided within the first fluid flow path between the inner and outer tubes. The sleeve defines an outer interface (16) with the inner surface of the outer tube and an inner interface (14) with the outer surface of the inner tube. Generally longitudinal grooves (16,17) are provided at each interface to provide together the first fluid flow path.

Abstract: A tube-in-tube heat exchanger for exchanging heat between two fluids is provided. The heat exchanger has at least one tube pair; spaced apart first and second tube sheets; first and second annular flow chambers; and first and second inner tube flow chambers. A gasket surrounds each inner tube of each tube pair at each end, forming a seal between each annular flow chamber, each inner tube flow chamber, and each inner tube. Such configuration allows for modular construction and easy cleaning and replacement of fouled or damaged tubes.

Abstract: An oil cooler for motor vehicles, having an outer tube and an inner tube which is disposed within the outer tube and whose outer surface, together with the inner surface of the outer tube, forms an annular channel, sealed in both ends, for feeding oil to be cooled, from an inlet at first ends of the tubes to an outlet at second ends of the tubes, a means provided in the annular channel for ensuring heat transfer from the passing oil to the surrounding tube walls, and a turbulence-generating means provided on the outer surface of the outer tube for a coolant, in which the oil cooler is submerged, the turbulence-generating means consisting of cup-shaped dimples or bump-like projections formed on the outer surface of the outer tube.

Abstract: A fluid-circulation heat exchanger including a porous body, made of thermally conductive material, in contact with at least one portion of a part to be cooled. The fluid flows through this porous body. The porous body has pores which generate directional changes of the fluid. These pores are large enough for the head loss of the fluid to be as small as possible on passage through the porous body. Application, in particular, to electron tubes.

Abstract: The hydraulic pressure to be supplied to a hydraulic actuator mounted on a vehicle, such as a hydraulic cylinder for vehicle height control, is arranged to be generated by utilizing a waste heat of a power source such as an engine of the vehicle or the like. There are provided an oil chamber to be connected to a hydraulic actuator, a pressurizing chamber containing therein, in a sealed manner, a medium which varies between a gaseous state and a liquid state, and a heating device which heats and evaporates the medium inside the pressurizing chamber and through which cooling water for cooling the power source to be mounted on the vehicle flows. The hydraulic pressure is generated by compressing the oil chamber by a vapor pressure of the medium inside the pressurizing chamber. In case the hydraulic actuator is a hydraulic cylinder for a vehicle height control, there is provided a flow control valve which controls the amount of supply of the cooling water to the heating device depending on the vehicle height.

Abstract: A heat transfer coil for exchanging heat between a primary fluid and a secondary fluid. The coil has a series of substantially parallel tubing runs. The primary fluid flows within the primary tubing. The secondary fluid flows outside the primary tubing and in contact with it. A heat pipe having a length has a first portion residing within a primary tube and a second portion residing outside the primary tube but adjacent and parallel to it. The secondary fluid thereby exchanges heat with the primary fluid both through the primary tube and through the heat pipe.

Abstract: Disclosed is an integral single-cast multi wall structure including a very thin wall and a second thin wall. There is a passageway interposed between the pair of walls of the structure, and a high thermal conductivity member extends into said passageways and thermally couples the walls. The high thermal conductivity member increases the heat transfer between the walls of the structure. The present invention further includes a method for casting an integral structure having very thin walls that utilizes the high thermally conductive member in the casting process to hold the pattern and cores in alignment.

Abstract: A firetube heat exchanger having a tubular member with a fluid inlet end and a fluid outlet end and a plurality of axially aligned fins secured to the interior wall of the tubular member. The axially aligned fins are constructed of at least one sheet of corrugated sheet metal, thereby providing fins having an upper side facing the interior of the tubular member and an underside facing the interior wall of the tubular member. Various embodiments include elements for controlling the flow of heat exchange fluid, typically products of combustion, on the upper side and the underside of the axially aligned fins.

Abstract: A water heater comprises a body portion; a plurality of heat transfer panels which are comprising the wall and the inner partition of the body portion and connected to each other through a water pipe; heat insulation plates which connect the heat transfer panels to each other in top end and bottom end thereof, and guide the flow of the combustion gas; and a combustion increasing plate which is installed between both heat transfer panels positioned at the center of the body portion and connected with the fuel combustion port, whereby the spaces among the heat transfer panels and the heat insulation plates serves as a flue.

Abstract: A packing case member or packing cup for use in a package of other similar cups for mounting on a reciprocally or rotatably movable machinery shaft to prevent gas leakage along the shaft is disclosed. The member includes a circular central opening for the shaft and provision for a conventional seal ring which slidably bears against the shaft as the shaft moves through the member. A fluid coolant passageway is formed in the member so as to extend around a majority peripheral portion of the central opening between inlet and outlet ports located at opposite end portions of the passageway. The passageway is characterized by at least three straight line segments which successively intersect one another at various angular positions around the central opening. Each straight line segment is accessible through a peripheral access opening which communicates with one end thereof for ease of cleaning debris clogging the passageway.

Abstract: A cooling system for an outdoor equipment enclosure includes a nested columnar heat exchanger used in combination with a diverter for controlling the flow of outdoor air. The heat exchanger includes an interior column coupled to a upper exhaust fan for drawing outside air upward through the enclosure. An outer column, formed to surround the interior column, provides a path for interior air flow. The diverter is positioned between the main equipment compartment and an underlying battery compartment. During the period of time that the outdoor air is warmer than the air in the battery compartment, the diverter guides the outdoor air directly into the heat exchanger. When the outdoor temperature drops, the diverter closes off this path and instead forces the outdoor air through the battery compartment and then into the heat exchanger, thereby cooling off the batteries as well as lowering the temperature in the main equipment enclosure.

Abstract: The heat exchanger (100) encompasses an vertical housing (1), in which a bundle (50) of parallel pipes (30) is provided, which pipes extend between a lower pipe header (10) and an upper pipe header (20) and can be flowed through by a hot process gas that enters at the intake (4) and exits at the outlet (9). At the outer circumference of the pipes (30), the heat of the process gas is transferred to a fluid cooling medium, for example air, that enters the housing (1) at the intake (17) and exits it at the outlet (24). The highest pipe (30) temperatures occur in the region of the lower pipe header, which, for this reason, is configured as a double pipe header (10) that is cooled by boiling water (FIG. 1).

Abstract: A quench cooler or transferline heat exchanger for quenching the effluent from a thermal cracking furnace has an inlet connector between the cracking furnace tubes and the tubes of the quench cooler. The tubes of the quench cooler are arranged in a circular pattern of spaced tubes. The flow passage of the connector is configured to initially decelerate and then re-accelerate the gas. This involves a conical diverging diffuser followed by a radial diffuser and then an annular converging section. The cross sectional transitions are smooth to avoid dead spaces and minimize pressure loss.

Abstract: The present invention relates to a device for bleeding off and cooling hot air in an aircraft engine, including:at least one hot air take-off at the outlet of the compressors of the engine,a cold air take-off downstream of the fan of the engine,a precooling heat exchanger between said hot air and said cold air.According to the invention, said precooling heat exchanger (18) comprises at least one (12A) of said linking arms (12) between the engine body (2) and the fan shroud (9), the said linking arm or arms (12A) acting as the exchanger, exhibiting a hollow structure traversed longitudinally by at least some of the hot air bled off at the outlet of the low pressure and/or high pressure stages of the compressors (3) of the engine.

Abstract: This invention for use with a water-using system is directed to a heat recovery and storage device adapted to recover heat from warm waste liquid and transfer it to cooler supply water where the flows of both waste liquid and supply water are intermittent and not necessarily contemporaneous, and to store the warmed supply water until required for use.

Abstract: A surrounding bead-type collar is pressed out from the pipe material or aat least one of two pipes forming a double-pipe heat exchanger. The radial height of the collars corresponds to the difference of the radii of the interior wall of the exterior pipe and of the exterior wall of the interior pipe. The collars form axial ends of an annular flow space of a completed heat exchanger. The thus constructed pipes with collars may be slid axially and thereby mounted on one another during manufacturing. Before this mounting operation, they are plated with a Nocolok fluxing agent and are subsequently soldered together in a heating step.

Abstract: A thermal transition section for introducing a high temperature cracked process gas into a quench exchanger having an inlet end comprising inner and outer concentric pipes connected to a closure ring to define an annulus between the pipes and an interior exchanger surface having an inside diameter. The transition section has a metal outer wall extending from a downstream end connected to the closure ring to an upstream end connected to a metal transition cone. The transition cone is connected at an upstream end to a line for supplying the process gas. The downstream end of the inner sleeve has an outside diameter matching the inside diameter of the interior exchanger surface. A precast, pre-fired single-piece ceramic insert substantially fills the annulus between the outer wall and inner sleeve. By using the ceramic insert, particularly a relatively long insert, thermal stresses are reduced and coke formation in the annulus is inhibited.

Abstract: An annular heat exchanger for incompatible fluids, such as reactive compounds, particularly for the aeronautics industry, in which a sealed bottle is fixed interior of a hollow body, with integral heat dissipators and novel fluid passageway orientation, whereby no leak can occur which would commingle the incompatible fluids.

Abstract: An offset strip fin for use in compact automotive heat exchangers is disclosed. The offset strip fin has multiple transverse rows of corrugations extending in the axial direction wherein the corrugations in adjacent rows overlap in order that the oil boundary layer is continually re-started. The fin dimensions have been optimized in order to achieve superior ratio of heat transfer to pressure drop along the axial direction. In one aspect, .?.an.!. .Iadd.a .Iaddend.compact concentric tube heat exchanger has an offset set strip tin located in an annular fluid flow passageway located between a pair of concentric tubes. The preferred range of lanced lengths is determined to be between 0.035" to 0.075" for periodically developed flow. Maintaining the lanced length in the regime of periodically developed flow is advantageous in that it gives a higher heat transfer coefficient than is achievable with fully developed flow.