Abstract: A refrigerant vapor compression system includes a compressor having a suction port and a discharge port, an air-cooled heat exchanger operatively coupled to the discharge port, a liquid-cooled heat exchanger operatively coupled to the air-cooled heat exchanger, a coolant pump operatively coupled to a liquid coolant inlet conduit of the liquid-cooled heat exchanger, an evaporator heat exchanger unit operatively coupled to the liquid-cooled heat exchanger and the suction port, a coolant pump operatively coupled to the liquid coolant inlet conduit for pumping a liquid coolant, and a controller operatively associated with the liquid coolant inlet conduit for controlling the flow of liquid coolant into the liquid-cooled heat exchanger. In one embodiment, the liquid-cooled heat exchanger comprises a low-profile enclosure defining an interior volume.

Abstract: A combustor for oxidizing a combustion fuel and pre-heating one or more reactants for fuel reforming. The combustor includes an elongated housing having an inlet for receiving a combustion fuel and an outlet for exhausting combustion products. The elongated housing further includes a cylindrical side wall, a bottom wall, and a top wall. Inert particles are disposed within the housing adjacent the inlet. A combustion catalyst bed is disposed within the housing above the inert particles that is a mixture of inert particles and combustion catalyst. The inert particles and the combustion catalyst preferably have a volumetric ratio of inert particles to catalyst between about 2:1 and about 4:1. The combustor has at least one heat exchanger within the combustion catalyst bed for heating a reformer reactant and generating steam. Preferably, the combustor includes at least two heat exchangers within the combustion catalyst bed, the heat exchanging elements have different surface areas.

Abstract: The present application provides an evaporator. The evaporator may include a housing, a coil assembly mounted within the housing, and a replaceable fan module positioned within the housing. The replaceable fan module may include a fan mounted therein.

Abstract: A refrigeration system comprising multi-output-port refrigerant distributor device. The device includes an input section, an output section and body portion. The input port is configured to be coupled to an expansion device of said system, and the output section has output ports each configured to be coupled to separate pressure-drop distributors of the system. The body portion is disposed between the input section and the output section. The body portion includes a passageway having an interior diameter which narrows in a direction from the input section towards the output section.

Abstract: In one embodiment, a heat exchanger is provided with an inside shell, an outside shell, a cooling portion, and an inlet nozzle. The inside shell has an inside space for flowing a fluid, and an opening portion for outflowing the fluid from the inside space. The outside shell covers the inside shell to form a first passage between them to flow the fluid outflowing from the opening portion. The cooling portion is disposed within the inside shell to cool the fluid within the inside space. The inlet nozzle has an inner pipe, an outer pipe, and an outlet pipe. The inner pipe flows the fluid into the inside space through the outside shell. The outer pipe covers the inner pipe to form a second passage between them and has its one end connected to the outside shell to communicate the second passage with the first passage, and its other end connected to the inner pipe on the outside of the outside shell to seal the second passage to flow the fluid partly from the first passage to the second passage.

Abstract: One exemplary embodiment can be a process for transferring heat to a first stream from a second stream in a hydrocarbon process. The process can include passing the first stream through at least one generally vertically-orientated tube in an exchanger. An interior surface of the at least one generally vertically-orientated tube may form one or more curved irregularities where the first stream, prior to entering the at least one generally vertically-orientated tube, may include a mixture of a gas including hydrogen and at least one or more C1-C3 hydrocarbons, and a liquid including one or more C4-C13 hydrocarbons.

Abstract: A heat exchanger includes a body. Both sides of the body are provided with a first flowing path set and a second flowing path set. The first flowing path set and the second flowing path set are provided with a plurality of flow-disturbing portions on both sides of the body respectively. The body is provided with an inlet and an outlet in communication with the first flowing path set and the second flowing path set. A working fluid circulates in the first flowing path set and the second flowing path set. The flow-disturbing portions make the working fluid to generate separated eddies to increase the strength of turbulent flow and to improve the heat-conducting efficiency of the heat exchanger greatly.

Abstract: Example motor cooling radiators for use in downhole environments are disclosed. A disclosed example radiator comprises a cylindrical housing having an annular passageway. The housing defines an inlet at a first end of the housing and an outlet at a second opposite end of the housing. A channel is arranged within the annular passageway of the housing along a spiral path to transport the first liquid and to define a spiral flow passageway between the inlet and the outlet for the second liquid. In operation, the first liquid does not contact the second liquid and heat is transferred between the first and second liquids as the second liquid flows in the spiral passageway.

Abstract: An exchange apparatus comprised of hollow perfluorinated thermoplastic tubes fusion bonded into a perfluorinated thermoplastic material to form unified terminal end blocks is disclosed. The hollow tubes are shaped by plaiting the tubes into cords and thermally annealing the cords to set the bends of the plait. The apparatus can have a housing bonded to the unified terminal end blocks. In use a first fluid enters the hollow tubes at openings in a first unified terminal end block, flows through the lumens of the tubes, and exits the tubes through a second unified terminal end block. A second fluid enters the housing, is separated from the first fluid by the wall of the tubes, and substantially fills the space between the inner wall of the housing and the outer diameters of the hollow tubes. Energy is transferred between the first and second fluids through the tube walls.

Abstract: The invention relates to a rolled heat exchanger with several pipes that are wound around a central pipe, with a casing that delimits an external space around the pipes and with a liquid distributor for distributing liquid in the external space. According to the invention, the liquid distributor is designed as a pipe manifold that has a main channel (21) and several distributing arms (22) that are flow-connected to the main channel (21).

Abstract: A heat exchanger for vaporizing a liquid and a method of using the same are disclosed herein. The heat exchanger includes a housing, a tube, a heater, and a plurality of non-reactive members. The tube is disposed in the interior of the housing and has an inlet and an outlet. The heater is configured to heat the tube. The plurality of non-reactive members are disposed in an interior cavity of the tube in an arrangement such that a plurality of voids are defined between the members and the tube. The arrangement also permits liquid to pass through the voids and travel from the inlet of the tube to the outlet of tube. The plurality of non-reactive members and the tube transfer heat to the liquid as the liquid passes through the plurality of voids in order to vaporize the liquid.

Abstract: A device that attaches to a bottle's neck has a base that secures to the bottle's neck and has two passages that traverse the base. The first passage leads to an enclosure located above the base that holds cooling material and optionally has a conduit that improves the heat exchange between a dispensing liquid and the cooling material retained in the enclosure. The exit passage of the enclosure has in at least one embodiment a valve. The second passage through the base forms a vent line that is located entirely below the enclosure and allows air to flow into the bottle as bottle's contents are dispensed through the first passage.

Abstract: A cylindrical shift converter (4) is disposed within an annular heat exchanger (28, 24) which has an outer wall (5). A plurality of spiral rods (90) create a plurality of spiral gas passages (26a) between the outer wall and a thin shell (92). The outer diameter of the thin shell is at least about 3/16 inch (about 4 mm) less than the inner diameter of an inner wall (20) of an annular hydrodesulfurizer (10), to facilitate inserting the shift converter and heat exchanger into the hydrodesulfurizer to form a unitized assembly (2). The spiral passages open into the hydrodesulfurizer.

Abstract: The invention relates to a mass transfer or heat-exchange column, a tube bundle heat exchanger, with a first mass transfer or heat-exchange area, a first tube bundle (2), and a second mass transfer or heat-exchange area, in particular a second tube bundle (8), that is arranged spatially above the first mass transfer or heat-exchange area, which are surrounded by a cover (10?). In a tube bundle heat exchanger according to the invention, a lower end section (40) of the second, smaller tube bundle (8) projects into a cover part (13?) of the first, larger tube bundle (2), by which an intermediate space (41) is formed between the lower section (40) of the second tube bundle (8) and the cover part (13?). In the area of this intermediate space (41), an inlet (26) for injecting a medium into the column and optionally a manhole (36) are arranged on the cover part (13?).

Abstract: A heat exchanger for a gas boiler for producing hot water is provided with a casing extending along a first axis and through which combustion fumes flow; a tube along which water flows, and which is housed inside the casing and coils about the first axis to form a helix made of a succession of turns; and deflecting means for directing the fumes between successive turns; the tube being provided with a first and a second fins, which extend along the length of the tube, face one another, and are tangent to the tube.

Abstract: A heat exchanger that can mechanically automatically control a level of cooling water according to heat generation of the fuel cell. The heat exchanger includes a housing having a cooling water inlet and an outlet connected to a fuel cell stack, a moving plate which moves reciprocally in the housing and discharges cooling water filled in the housing to the stack when it moves in a one direction and when it receives a steam pressure from the stack it moves in an opposite direction, and an elastic member that applies a force to the moving plate in the one direction. The heat exchanger can automatically maintain the level of cooling water despite a difference in heat generated between a full and a partial load operation of the fuel cell obviating complicated electronics such as a thermo-sensor, a valve, or a controller. Also, under a partial load, the exposure of flow channels to superheated steam is avoided, thereby extending the lifetime of the fuel cell.

Abstract: The apparatus (1) which combines a heat exchange between a liquid (8) and a heat transporting medium (7) with a static mixing of the liquid includes installed structures (2) in a jacket (3). The jacket extends longitudinally between a head end (4) and a base end (5). The installed structures form a heat exchanging and mixing structure. The heat transporting medium can be conveyed from the base end to the head end as an inner flow in tubes (21, 22) of the installed structures. The liquid can be conveyed from the head end to the base end as an outer flow. Reinforcement elements (6, 6?, 6?) are provided which stabilise the installed structures in the longitudinal direction against pressure gradients generated by the liquid. The installed structures are connected by the reinforcement elements to form a non-expandable part structure (2a) in a main region; they remain at least partly non-reinforced as a longitudinally expandable part structure (2b) and in a secondary region complementary to the main region.

Abstract: A spiral heat exchanger includes two assembled covers defining a chamber therebetween for receiving a spiral unit therein. The spiral unit includes a first and a second spiral member separately spirally extending from a central outlet to a peripheral outlet on the two covers to respectively form a first and a second flow passage. A driving unit is assembled to and drives the assembled covers to rotate at the same time, so that cold and hot airflows respectively enter and flow through the first and second spiral members from the central outlet to the peripheral outlet under a centrifugal force to exchange heat at the spiral unit. The spiral unit provides extended flow passages and increased heat exchange area, giving the spiral heat exchanger increased heat transfer capacity and heat exchange efficiency and allowing omission of fans and radiating fin assembly to eliminate operating noise and accumulated dust.

Abstract: A heat exchanger A1 includes: a case 2 surrounding a heat transfer tube 4; and a guide member 5 for guiding heating gas entering the case 2 through an intake vent 21 to a first space region 24A and then to a second space region 24B, the guide member 5, together with a wall portion 20b, defining therebetween a gap 25b in communication with a gap 25a between the wall portion 20b and the heat transfer tube 4 for allowing part of the heating gas having been guided to the first space region 24A to proceed into the second space region 24B through the gaps 25a and 25b. This arrangement performs efficient heat recovery from the heating gas by effectively utilizing the entire heat transfer tube 4 while alleviating a problem that the case 2 is partially heated to elevated temperatures.

Abstract: A heat exchanger associated with a duct for a first fluid including: a central duct portion in fluid communication with the duct having an interior space and an exterior surface; a valve having opened and closed positions engageable within the interior space of the central duct portion; at least one coiled conduit for a second fluid positioned about at least a portion of the exterior surface of the central duct portion; upper and lower duct portions in fluid communication with the central duct portion including stationary upper and lower duct portions and movable upper and lower duct portions having opened and closed positions; and an at least partially movable and/or removable shell engaged with the stationary upper duct portion and the stationary lower duct portion and enclosing the coiled conduit; and, a refrigeration apparatus and process including the same.

Abstract: “ARRANGEMENT INTRODUCED IN AIR COOLER EQUIPMENT WITH SELF-DRYING RESERVOIR OF CONDENSED WATER”, it consists essentially of an equipment (1) to be used in the tissue cooling, as auxiliary in procedures of laser treatment among others that in contact with the tissue produces a temporary cryoanalgesia, whose distinction is the fact of the coil (2Q) of the hot phase of the gas is located inside the reservoir (3) catcher of water from thaw, promoting its evaporation throughout the use of the equipment (1).

Abstract: Embodiments of a modular condenser unit are provided. The modular condenser unit may include a housing and a first condenser coil and a second condenser coil disposed within a volume of the housing. A fan may also be disposed in an end of the housing and adapted to draw air through at least one of the first condenser coil and the second condenser coil. In some embodiments, the first condenser coil and/or the second condenser coil may be micro-channel condenser coils.

Abstract: The invention provides high-efficiency heat transfer devices and apparatuses In one embodiment, the invention includes a vessel capable of containing the heat transfer medium, a conduit extending through a wall of the vessel, the conduit having a first surface for contacting the heat transfer medium and a second surface for contacting a fluid within the conduit, a helical member residing around and along a length of the first surface of the conduit capable of angularly directing a flow of the heat transfer medium along the first surface of the conduit; and a plurality of fins helically arranged adjacent the helical member, each fin extending through a wall of the conduit and being capable of directing at least a portion of the heat transfer medium to an area within a radius of the conduit.

Abstract: The present invention relates to a vertical relay fluid storage barrel installed with fluid inlet and fluid outlet for whole or in part placement into natural thermal energy body in vertical or downward oblique manner, wherein a thermal energy exchanger is installed inside the relay fluid storage barrel temporarily storing thermal conductive fluid for external flow, the thermal energy exchanger is installed with fluid piping for the thermal conductive fluid passing through, to perform heat exchange with the fluid in the relay fluid storage barrel, and the fluid in the relay fluid storage barrel performs heat exchange with the natural thermal energy body.

Abstract: The present invention relates to a device, which is composed of one or more parallel or quasi-parallel installed fluid piping by series connection or parallel, every piping is specifically distributed by one or more double-scroll arrangement for transmitting thermal conductive fluid, and the double-scroll fluid piping constitutes fluid flow uniformly distributed by temperature difference.

Abstract: The invention relates to a device for feeding heated water steam via a heat exchanger in a thermal engine and method for using said device.

Abstract: A heat exchanger (10) comprises a first sheet (12), a second sheet (14) and an additional sheet (30). The first and second sheets (12,14) are wound around an axis (X), each sheet (12,14) has hot and cold edges at the hot and cold ends (16,18) respectively of the heat exchanger (10). The hot and cold edges of the first sheet (12) are joined to the hot and cold edges of the second sheet (14). The end (12A) of the first sheet (12) is joined to the second sheet (30) by an axially extending join (28) at a position spaced from the end (14A) of the second sheet (14). The end (30A) of the additional sheet (30) is joined to the end (14A) of the second sheet (14) by an axially extending join (28). The additional sheet (30) is thicker and wider than the first and second sheets (12,14) such that at least one of the hot and cold edges (30C,30D) of the additional sheet (30) extend beyond the hot and cold edges of the first and second sheets (12,14).

Abstract: This exchanger comprises a pair of primary tubular bundles (5a, 5b) surrounding a fuel or gas burner (4a, 4b), and a secondary tubular bundle (6) on which condensation of the steam contained in the burned gases discharged from the primary bundles occurs, wherein the three bundles (5a, 5b, 6) are mounted parallel, side-by-side inside a gas-tight casing (10), and communicate with one another, with means being provided in order to circulate the water to be heated, between the tubes forming the secondary bundle (6) and the tubes forming the primary bundles (5a, 5b); the casing (10) is subdivided at the level of the secondary bundle (6) by a partition (7-70) that extends both inside and outside said bundle (6), with the arrangement being such that a only a circumferential section of the latter is capable of being contacted and traversed by the hot gases coming from one of the two primary bundles (5a), and its remaining section being capable of being contacted and traversed only by the hot gases coming from the oth

Abstract: A heat exchanger includes a heat transmitting structure for heat exchange and a guide member. The heat exchanger is configured to exchange heat between external fluid flowing outside the heat transmitting structure and the heat transmitting structure. The heat transmitting structure includes a plurality of heat transmitting members for heat exchange. The heat transmitting members are arranged side by side in such a manner as to have intervals between the adjacent heat transmitting members. The guide member is arranged in the intervals between the heat transmitting members so as to change a direction of the external fluid flowing outside the heat transmitting structure.

Abstract: A countercurrent chromatography apparatus includes a plurality of plates, at least one plate (16) having first and second interleaved spiral flow channels (52, 54, 56, 58) therein. Each spiral flow channels (52, 54, 56, 58) has a first end (I1, I2, I3, I4) near the central axis and a second ends (O1, O2, O3, O4) near the periphery. The outlet of the first channel (O1) is connected to the inlet of the second channel (I2) by a connecting channel (72). Septa may be provided between the plates to connect the spiral channels of one plate to the spiral channels of the next plate.

Abstract: The invention encompasses a temperature regulating system that includes a shell configured to be received over an outer circumferential portion of a container. The shell has dimensions to form a cavity between the outer circumferential portion of the container and the shell. A material is provided in sealing engagement between the shell and the outer circumferential portion of the container to seal the cavity from the environment. A heat exchanger is provide in fluid communication with the cavity.

Abstract: A double-wall pipe includes an outer pipe, and an inner pipe disposed inside the outer pipe. An outer wall of the inner pipe has thereon a ridge portion, which defines a groove portion extending in a longitudinal direction of the inner pipe. The outer pipe and the inner pipe are bent to have a straight portion extending straightly, and a bend portion bent from the straight portion. In the straight portion, the outer pipe has an inside diameter that is larger than an outside diameter of an imaginary cylinder defined by an outer surface of the ridge portion of the inner pipe. Furthermore, the ridge portion of the inner pipe contacts an inside surface of the outer pipe to be readially squeezed and held by the outer pipe, in the bend portion. The double-wall pipe can be suitably used for a refrigerant cycle device.

Abstract: A rotatable cooling module includes a cooling coil. An input line is coupled to the cooling coil via a coupler that allows the cooling coil to rotate independent of the input line. An output line is coupled to the cooling coil via a second coupler that allows the cooling coil to rotate independent of the output line. A coolant flows through the input line and the first coupler and passes through the cooling coil, which removes heat from an electronic assembly to which the cooling unit is attached. The coolant then flows through the second coupler and through the output line and returns to a heat exchanger, which cools the liquid before recirculating through the cooling unit. The couplers are disposed about a single axis which allows the cooling module to be rotated, and the couplers prevent damage from occurring to any of the elements of the cooling module.

Abstract: One exemplary embodiment can be a process for cooling a vent stream from a receiver. Generally, the process may include providing a refrigerant including at least one compound contained in the receiver so the refrigerant leaking into the receiver can be compatible with the process.

Abstract: A spacer includes a plane portion and at least one positioning portion. The plane portion is interposed between two pipe arrays stacked one another. Each of the two pipe arrays is formed by arranging at least one pipe along a plane which crosses a stacking direction of the two pipe arrays. The at least one positioning portion positions the at least one pipe in at least one of the two pipe arrays on the plane portion.

Abstract: A heat exchanger for use with exhaust pipes. A shroud inlet communicates with a rear chamber, which communicates with a front chamber via a center plate vent. The front chamber communicates with a shroud outlet. Ambient air entering the rear chamber is routed around at least one J-pipe in the rear chamber, and around a collector in the front chamber, thus being twice heated prior to exiting the heat exchanger through the shroud outlet. The double heating provided by this design increases the efficiency of the heat exchanger. The collector is attached to the center plate by means of a full-penetration fillet weld, and the J-pipes are attached to the center plate, a front plate, and a pipe assembly baffle by stitch welding external to the J-pipes, thus strengthening the integrity of the hermetic seal between exhaust gasses and ambient air passing through the heat exchanger.

Abstract: A hot-water storage type hot-water supply device includes a heat pump unit (1) for heating water, a hot-water storage tank (21) for storing hot water heated by the heat pump unit (1), and a hot-water supplying heat exchanger (22) placed so as to extend roughly entirely in a vertical direction thereof and which receives water from a lower side thereof and discharges hot water from an upper side thereof.

Abstract: A heat exchanger assembly of the type having a cylindrical coil in an insulated tank, the assembly having different heat exchanger sections having different thermal conductivities.

Abstract: A pump-free water-cooling system includes a heat-exchange circulating solution container containing heat-exchange circulating solution and vapor of the circulating solution, at least one solution outlet to discharge the circulating solution from the container, and a gas-liquid two-phase fluid inlet to charge into the container gas-liquid two-phase fluid composed of the circulating solution. The system also includes a circulating-solution transporting route in which a first transportation route is linked to a second transportation route which is linked to a third transportation route. A sensible-heat-emitting heat exchanger is provided along the first transportation route. The first transportation route is linked with the solution outlet. Heat exchange is carried out along the second transportation route at least between circulating solution therein and the circulating solution in the container. A heating heat exchanger is provided along the third transportation route.

Abstract: A heat exchanger for a gas boiler for producing hot water is provided with a casing extending along a first axis and through which combustion fumes flow; a tube forming a plurality of turns along which water flows arranged inside the casing so as to form gaps between adjacent turns; a disk for guiding said fumes trough the gaps; and teeth integrally made with the tube for spacing adjacent turns apart and forming said gaps.

Abstract: The present invention discloses a heat transfer unit which integrates a boiler and a gas preheater for steam generation and gas preheating. In one embodiment, the heat transfer unit of the present invention may be used in fuel processing applications. In this embodiment, the heat transfer unit may be located downstream of a combustor such as an anode tailgas oxidizer.

Abstract: In a parallel flow heat exchanger having an inlet manifold connected to an outlet manifold by a plurality of parallel channels, a spirally shaped insert is disposed within the refrigerant flow path in the inlet manifold such that a swirling motion is imparted to the refrigerant flow in the manifold so as to cause a more uniform distribution of refrigerant to the individual channels. Various embodiments of the spirally shaped inserts are provided, including inserts designed for the internal flow of refrigerant therethrough and/or the external flow of refrigerant thereover.

Abstract: The present invention concerns an isothermal reactor (1) comprising a substantially cylindrical shell (2), at least one catalytic bed (10) supported in the shell (2) and at least one heat exchange unit (13) supported in the bed (10), the heat exchange unit (13) comprising a plurality of exchangers (14) substantially box shaped, of essentially elongated rectangular and flattened structure, each of the exchangers (14) having opposite long sides (14a) parallel to the cylindrical shell (2) axis and opposite short sides (14b, 14c) extended perpendicularly with respect to the shell axis and comprising furthermore an inner chamber (18) through which a heat exchange operating fluid in intended to flow, wherein at least one exchanger (14) of such at least one heat exchange unit (13) is internally equipped with a plurality of separation baffles (19) extended from a short side (14b or 14c) of the exchanger to the opposite short side (14c or 14b) and in a predetermined spaced relationship with respect to the latter, defi

Abstract: An energy recovery device particularly for heating or industrial systems that entail the combustion of products, comprising a tubular element, which is arranged at a flue or stack and has a coil which is perforated along its extension. The coil is connected to a delivery tube for the treatment water for scrubbing the exhaust gases. The tubular element has an outlet for collecting the treatment water, which can be conveyed to a recuperator/heat exchanger. The device makes it possible to reduce the emission of particulates and pollutants into the environment and reduces the temperature of the exhaust gases besides allowing heat energy recovery.

Abstract: An energy recovery apparatus for heating or industrial systems that entail the combustion of products, comprises a tubular element, which is arranged at a portion of a stack or flue and is provided with a delivery for feeding water for scrubbing exhaust gases. The tubular element has an outlet for collecting the treated water that can be conveyed to a heat exchanger. The apparatus allows reduction of the emission of particulates and pollutants into the environment and makes it possible to achieve a reduction in the temperature of the exhaust gases as well as heat energy recovery.

Abstract: A method and apparatus are provided for cooling fluids entering a closed circuit cooling tower. A triple circuit assembly is used to cool the fluid in the closed loop. The triple circuit assembly design allows a heat transfer tube bundle to maintain a relatively low pressure drop, but without simultaneously lowering thermal performance to a significant degree as compared to traditional double serpentine or QUAD serpentine designs.

Abstract: An air conditioning system that may incorporate a controller, a variable capacity compressor responsive to the controller, an evaporator in communication with an input of the compressor, and at least one cooling component for generating an airflow over the evaporator to generate a cooling airflow using the evaporator, the cooling component being responsive to the controller. A first input enables a user to provide a user determined dry bulb temperature range for an enclosed environment, and a second input enables the user to provide a user determined moisture content range for the enclosed environment. The controller controls at least one of the compressor and the cooling component to vary a sensible heat ratio (SHR), in order to maintain a dry bulb temperature and the moisture content within the enclosed environment in accordance with the user defined ranges.

Abstract: A refrigerated display case is provided that includes a display chamber for displaying product. The display chamber includes a product tray for supporting the product. A cooling chamber is arranged beneath the product and is in communication with a surface of the product tray. The cooling chamber is sealed from the display chamber, in one example, and includes a cooling coil. A fan is in communication with the cooling chamber and cooling coil. The fan circulates a cooling flow through the cooling coil. The cooling flow moves across the surface and absorbs heat from the product tray by convection. The cooled product tray removes heat from the product by conduction.

Abstract: The invention relates to a heat exchanger (10) having an elongate hollow body with connections (12, 12?, 13, 13?) for the supply and discharge of a first and of a second medium, in which the first medium is guided through the elongate hollow body in a counterflow with respect to a second medium, and the second medium flows through a spiral tube (11) which extends longitudinally axially between the end sides of the hollow body, and wherein a plurality of deflecting elements (18) projects into the hollow body interior from the hollow body inner casing, which deflecting elements deflect the flow of the first medium. To improve efficiency, it is provided that the deflecting elements project in an alternating sequence from in each case opposite hollow body sides into the hollow body interior and into the region of the spiral tube, in such a way that said deflecting elements end between two spirals, and that the hollow body inner casing has, in sections, a plurality of concavely-shaped constrictions.

Abstract: The subject of the invention is a hot gas generator (8), particularly for a dehydration or drying unit, the generator comprising a burner or hearth (9) and being characterized in that it comprises at least one exchange circuit (10) comprising at least one pipe through which the gas to be heated flows, the pipe comprising a cool gas inlet end (11) and a hot gas discharge outlet (12), the pipe having a surface for heat exchange between the combustion gases generated by the burner or hearth (9) and the gas to be heated which flows through the pipe, the pipe also providing a physical barrier between the heated gases and the combustion gases generated by the burner or hearth. Application to producing a drying or dehydration installation.