Abstract: Multi-scale turbulation features, including first turbulators (46, 48) on a cooling surface (44), and smaller turbulators (52, 54, 58, 62) on the first turbulators. The first turbulators may be formed between larger turbulators (50). The first turbulators may be alternating ridges (46) and valleys (48). The smaller turbulators may be concave surface features such as dimples (62) and grooves (54), and/or convex surface features such as bumps (58) and smaller ridges (52). An embodiment with convex turbulators (52, 58) in the valleys (48) and concave turbulators (54, 62) on the ridges (46) increases the cooling surface area, reduces boundary layer separation, avoids coolant shadowing and stagnation, and reduces component mass.

Abstract: A shell and tube heat exchanger comprising: a shell having an inlet end-cap attached to a first end of the shell, wherein an outlet end-cap is attached to a second end of the shell and a tube bundle being housed within the shell, said tube bundle including a plurality of parallel-spaced tubes that traverse the interior of shell from a first end to a second end of the tube bundle, and wherein a plurality of baffles are arranged within the shell supporting the parallel-spaced tubes of the tube bundle. At least a part of the shell and tube heat exchanger is provided with a coating comprising silicon oxide, SiOx.

Abstract: A cooling passage defined between first and second spaced apart sidewalls of a turbine engine component includes a turbulator system including a plurality of rows of turbulator members. Each row includes a first side turbulator member extending from the first sidewall, and a second side turbulator member extending from the second sidewall. The first and second side turbulator members are arranged such that a space is defined therebetween. The first and second side turbulator members are staggered with respect to one another such that respective forward and aft ends thereof are offset from one another. Each row further includes at least one elongate intermediate turbulator member located at least partially in the space between the respective first and second side turbulator members.

Abstract: A heat exchanger is provided having two headers with a plurality of elongate tubes extending between the headers, where the tubes cooperate with an array of fins. The tubes have a plurality of dimpled sections having a non-uniform dimple density alternating with a plurality of smooth sections. The alternating dimpled and smooth sections allow heat to effectively transfer from a liquid coolant flowing through the tubes into the tube walls and fins at laminar, transitional, and turbulent flow conditions.

Abstract: Channel members 100 to 107 according to the present invention have an inner spiral channel 9 through which a fluid 23 flows. The channel 9 is formed by a lid part 1, a bottom plate part 3, and a wall part 2 connected to the lid part 1 and the bottom plate part 3. The wall part 2 is made of a ceramic laminate. Even if the wall part 2 of the channel members 100 to 107 is narrow between channel segments 9, its good corrosion resistance allows the channel 9 to be resistant to collapse when the fluid 23 is supplied at high pressure. A heat exchanger 200, a semiconductor unit 300, and a semiconductor manufacturing apparatus 400 including any of the channel members 100 to 107 have improved heat exchange efficiency between the channel members 100 to 107 and the fluid 23.

Abstract: A distribution structure of a heat exchanger includes one inlet pipe connected to a header. The heat exchanger includes a first header having a first chamber and a second chamber, a second header having a third chamber and a fourth chamber, and a plurality of tubes arranged in a plurality of rows. An inlet pipe is connected to the first chamber and an outlet pipe is connected to the second chamber. A distributer distributes the refrigerant flowing into the first chamber to the tubes of the front row, the distributor includes a first separating baffle dividing the first chamber into a mixing chamber in which the refrigerant is mixed and a supplying chamber for supplying the refrigerant to the tubes, a distribution pipe communicating the mixing chamber with the supplying chamber, and a second separating baffle dividing the supplying chamber into a plurality of independent chambers.

Abstract: An automotive battery module with numerous battery cells and a series-based cooling fin arrangement placed in thermal communication with at least two of the battery cells. Heat generated within the battery cells by, among other things, electric current that can be used to provide motive power for the automobile, may be removed by the cooling fin that includes different portions tailored to remove relatively lesser or greater amounts of heat, depending on a potential temperature difference among the cells. The construction of the cooling fin is such that multiple heat transfer paths are established, each configured to convey heat away from the battery cells, as well as to keep temperature differences between adjacent series-cooled battery cells to a minimum. In one form, the multiple heat transfer paths may include a relatively laminar portion and a relatively turbulent portion, where in one form the increased turbulence may be obtained through numerous turbulators.

Abstract: An airflow deflector including a plurality of spaced apart ribs each extending in a longitudinal direction between a first end and a second end thereof that is generally perpendicular to an airflow stream to be deflected by the airflow deflector such that the plurality of spaced apart ribs induce recirculations of the airflow stream between neighboring ones of the plurality of spaced apart ribs to increase air pressure at an entrance to areas defined between neighboring ribs and restrict the airflow from flowing past the plurality of spaced apart ribs.

Abstract: A heat exchanger 10 includes a conduit 12 for conveying cooling fluid relative to a body to be cooled. A heat transfer arrangement 62 is arranged in communication with an interior of the conduit 12, the heat transfer arrangement 62 and the conduit 12 together defining an assembly that is mountable adjacent the body to be cooled, convective heat exchange occurring, in use, due to movement of the cooling fluid relative to the body and to the heat transfer arrangement 62 of the assembly and radiant heat exchange occurring between the body and at least part of the heat transfer arrangement 62 of the assembly.

Abstract: A heat exchanger tube is constituted by a flat tube body 14 shaped like a plurality of cylindrical tubes arranged mutually proximally in a plane and connected together at mutually proximate portions of the tubes as communicating portions 13. Cylindrical portions 15 corresponding to the cylindrical tubes of the flat tube body 14 have inner peripheries formed with swirling-flow-forming protrusions 16 directed along spiral trajectories coaxial with central axes O of the cylindrical portions 15 so that the respective cylindrical portions 15 may have individual swirling flows of the exhaust gas 10.

Abstract: A heat exchanger including a shell forming a generally cylindrical housing, a plurality of dividers within the shell extending along the length of the shell, wherein the dividers separate the shell into sections and each section forms a shell pass. The heat exchanger can further include a plurality of tube passes, wherein at least one tube pass is contained within each of the shell passes, and each tube pass comprises a plurality of tubes extending along the length of the shell, a shell inlet passage configured to receive a first fluid into a first shell pass and a shell outlet passage configured to discharge the first fluid from a last shell pass, and a plurality of shell pass passages formed in the dividers near a first end or a second end of the shell configured to allow flow of the first fluid from one shell pass to the next shell pass.

Abstract: A heat exchanger including a header having a plurality of header openings with conduits that may be made of plastic are inserted in the openings. The conduits are sealed to the header to prevent leakage between the header and the tubes to prevent water and air leakage between the wet, scavenger air stream flowing through the tubes and a dry air stream flowing around the tubes. A method of making the heat exchanger includes providing the openings inwardly curving perimeter walls that allow for easy insertion of the tubes. A self-leveling sealant may be used to seal the heat exchange conduits to the header using, for example, a paint roller and/or a paint sprayer. The heat exchange conduits can include a plurality of stubby fins formed on the inner wall surface of the conduit.

Abstract: The invention relates to a plate (4, 12, 14) intended to allow an exchange of heat between a first fluid and a second fluid flowing in contact with the plate (4, 12, 14), said plate (4, 12, 14) being configured to define a circuit (8) comprising a plurality of successive passageways (71, 72, 73, 74), inside which the first fluid flows in one direction of flow, changing its direction of flow from one passageway to the other, each of said passageways (71, 72, 73, 74) having a flow section for the first fluid. According to the invention, the flow section of one passageway (71, 72, 73, 74), known as the upstream passageway, is larger than the flow section of another passageway (71, 72, 73, 74), known as the downstream passageway, which is situated downstream of the upstream passageway in the direction of flow of the first fluid in the circuit (8). The invention also relates to a heat exchanger equipped with such plates.

Abstract: A fluid mixing device includes a hollow tubular main body (41) to mix an exhaust gas (G4) and a warming gas (G5) within it, a first inflow port (43) provided in an upstream end portion of the main body (41) and through which the exhaust gas (G4) flows, a mixing promotion body (38) of a tubular shape disposed inside the main body (41) and having a longitudinal axis (C1) extending in a direction conforming to a direction of flow of the exhaust gas (G4), and a second inflow port (45) provided in a peripheral wall of the main body (41) and through which the warming gas (G5) flows towards an outer peripheral wall of the mixing promotion body (38). The exhaust gas (G4) flows outside and inside the mixing promotion body (38).

Abstract: An electronic device includes a bottom plate and a cooling assembly. The cooling assembly includes an installation box, a fan received in the installation box, and a fin module secured to the installation box and closed to the fan. The fin module defines a cutout adjacent to the fan module and extends towards the bottom plate. An airflow directed by the fan is guided along a first direction by the fin module to dissipate heat generated from a heat generating component that is thermally connected to the fin module, and along a second direction through the cutout to dissipate heat generated from the bottom plate. The cooling assembly dissipates heat for the heat generating component and the bottom plate simultaneously.

Abstract: Systems, apparatuses, and methods described herein are directed to a heat exchange tube structure and an arrangement of heat exchange tubes that enhance or help promote fluid flow through a heat exchanger. Bend portions of heat exchange tubes may be structured and configured to allow for gaps so that fluid may pass an assembly of the heat exchange tubes. The heat exchange tubes may be arranged to expose the air gaps at the bend portions of the heat exchange tubes to promote fluid flow.

Abstract: A thermal management device (401) is provided which comprises a synthetic jet actuator (403) and a heat sink (405) comprising a fin (407). The fin has at least one interior channel (409) defined therein which has first and second openings that are in fluidic communication with each other. The synthetic jet actuator is adapted to direct a synthetic jet into said channel.

Abstract: The invention relates to an assembly of two brazing sheets the first one of which consists of a 3xxx alloy clad on one surface with a 1xxx alloy, the second one of which consists of an AA3xxx alloy clad on both surfaces thereof with a 4xxx alloy, which are assembled together by brazing so as to form a disrupted channel for the flow of exhaust gases, in particular for an engine vehicle.

Abstract: A plate for a heat exchanger for heat exchange between a first and a second medium has a first side and an opposing second side. The first side is configured with at least one heat transferring elevation and with at least one heat transfer surface surrounding the elevation. Dimples are provided at either or both of the heat transferring elevation and the heat transfer surface to permit provision of a through-flow duct for the first medium. The second side is configured with at least one heat transferring depression corresponding to the elevation. The depression is configured to define a part of a through-flow duct for the second medium. The second side has at least one bonding surface corresponding to the heat transfer surface and surrounding the depression. A heat exchanger includes a stack of the above-mentioned plates and an air cooler includes such a heat exchanger.

Abstract: Disclosed are various turbulent, corrosion-resistant heat exchangers used in desiccant air conditioning systems.

Abstract: A heat exchanger (10) that is included in a cabinet (11) housing a plurality of baffles (12, 13). The baffles (12, 13) are arranged alternately and are spaced by a sheet material (14) that provides for the transfer of heat between gases passing through the baffles (12, 13). The baffles (12) each have a plurality of dividing walls (21) that provide a plurality of passages (22). The passages (22) extend between opposite longitudinal sides of the heat exchanger (10). The baffles (13) each have a plurality of dividing walls (33) that provide a plurality of passages (34) that extend between opposite end portions of the heat exchanger (10).

Abstract: A corrugated fin (6) disposed between flat tubes (5) having a cross-sectional shape extended in a first direction includes a plurality of plate portions (6A) and a plurality of folded portions (6B). Each plate portion (6A) has a plurality of louvers (7) formed by cutting and raising, the louvers (7) being inclined with respect to the first direction and being substantially continuous with each other in the first direction. Each plate portion (6A) has an extension portion (60) projecting windward in the first direction from a joining region (8) where the folded portions (6B) are joined to the flat tubes (5). A foremost louver (7a) that is located on the most windward side among the louvers (7) is disposed entirely within the extension portion (60). Each plate portion (6A) has a front flat portion (61) located windward of the foremost louver (7a). The front flat portion (61) has an area larger than half of that of the extension portion (60).

Abstract: An evaporator plate made of a metal plate having a plurality of shaped dimples thereon, the dimples each being defined by a pair of opposing pyramid shaped end faces and a pair of trapezoidal shaped left and right side faces adjoining the pair of pyramid shaped end faces. An evaporator assembly comprising first and second evaporator plates and tubing arranged in a serpentine path sandwiched therebetween, each plate including a plurality of parallel fins extending from a first surface, a pair of end flanges parallel to the fins, and a plurality of the shaped dimples. A tool for making the plate and a method of making the assembly are disclosed.

Abstract: A method for high temperature sterilization of an emulsion, in particular a dermocosmetic preparation. The method comprises the steps of gradually pre-heating, performing ultra-high temperature sterilization and gradually cooling the emulsion. The emulsion is heated up to a pre-heating temperature, which is the temperature of the emulsion at the stability limit. Ultra-high temperature sterilization is performed by infusion of the pre-heated emulsion by heating the emulsion up to a sterilization temperature, maintaining the emulsion at the sterilization temperature, and cooling the emulsion under a vacuum at an end-of-sterilization temperature. The emulsion is gradually cooled with agitation to a storage temperature.

Abstract: A thermal energy transfer apparatus is described. The apparatus includes a silicon-based support module and a plurality of silicon-based plate modules. The silicon-based support module includes a plurality of grooves on a first primary surface of the support module. The plurality of silicon-based plate modules each includes a first primary surface, a second primary surface opposite the first primary surface, and a plurality of edges that are between the first and the second primary surfaces. A first edge of the edges of each plate module is received in a respective one of the grooves of the support module to attach the respective plate module substantially orthogonally to the support module.

Abstract: A cooling system for a battery pack includes a fluid source for providing cooling fluid and a turbulator in which the cooling fluid flows along an average flow direction. The turbulator includes a first support member, a second support member, a third support member, a first plurality of rods positioned between the first support member and the second support member, and a second plurality of rods positioned between the second and the third support members. The first plurality of rods is offset from the second plurality of rods in a direction perpendicular to the average flow direction. Finally, the first plurality of rods and the second plurality of rods disrupt fluid flow from the fluid source into non-laminar flow.

Abstract: A baffle includes a body member having a first surface, a second opposed surface, and an outer peripheral edge. An aperture may be formed through the body member to define an inner peripheral edge. The inner peripheral edge is distorted to be non-planar. An apparatus includes a first conduit having a first end, a second end, and a first channel extending therebetween. At least one baffle is disposed in the first channel and includes a body member having a first surface, a second opposed surface, and an outer peripheral edge. At least one aperture may be formed through the body member to define an inner peripheral edge. The inner peripheral edge is distorted to be non-planar. A second conduit may be disposed inside the first conduit and extend through the aperture in the baffle. The apparatus may be an ultraviolet light reactor, a heat exchanger, or a static mixer.

Abstract: A heat exchanger is provided including a plurality of heat exchanger tubes. A first fluid flows through each heat exchanger tube and a second fluid flows around an exterior of each heat exchanger tube. A turbulator is disposed within at least one of the heat exchanger tubes. The turbulator extends at least a portion of the length of the heat exchanger tube. The turbulator includes a generally flat sheet of material having a plurality of integrally formed turbulence generating elements. The turbulence generating elements extend from a plane of the sheet of material into the first fluid flow. A disturbance is created in the first fluid flow adjacent each turbulence generating element.

Abstract: A baffle includes a body member having a first surface, a second opposed surface, and an outer peripheral edge. An aperture may be formed through the body member so as to define an inner peripheral edge. The inner peripheral edge is distorted so as to be non-planar. An apparatus includes a first conduit having a first end, a second end, and a first channel extending therebetween. At least one baffle is disposed in the first channel and includes a body member having a first surface, a second opposed surface, and an outer peripheral edge. At least one aperture may be formed through the body member to define an inner peripheral edge. The inner peripheral edge is distorted so as to be non-planar. A second conduit may be disposed inside the first conduit and extend through the aperture in the baffle. The apparatus may, for example, be configured as an ultraviolet light reactor, a heat exchanger, or a static mixer.

Abstract: A heat exchange device is presented, the device comprises one or more channels having inlet and outlet ports configured to direct flow of a predetermined fluid to and from said one or more channels. Said one or more channels of the device comprise at least one channel having at least one orifice of a predetermined hydraulic diameter configured such that a flow of said predetermined fluid through said orifice and through said channel thereby generating a vortex ring-like fashion of the flow within the channel to provide efficient heat transfer by the fluid.

Abstract: An apparatus for heating or cooling a meltable material in a container, comprising a heating element (10) and a holding device (20), the heating element (10) being of a tubular design, with an inflow opening (11) and an outflow opening (12) for a heat transfer medium to flow through, and being fastened to the holding device (20) movably in at least one spatial direction as the main direction of movement, wherein the apparatus also has a stirrer (30) for mixing liquid material through, which is likewise arranged movably in the main direction of movement.

Abstract: An evaporator or a condenser includes a surface on which the operating liquid is arranged. Further, turbulence generators are provided to generate turbulences in the operating liquid located on the operating surface. In the condenser, alternatively or additionally, a laminarizer is present to make the vapor stream laminar provided by the compressor. On the evaporator side, the evaporation efficiency is increased and, on the condenser side, the condenser efficiency is increased, which may be used for a substantial reduction in size without loss of power of these components, in particular for a heat pump for heating a building.

Abstract: A method is provided for heat transfer from a surface to a fluid. The method includes directing a first fluid flow towards the surface in a first direction and directing a second fluid flow towards the surface in a second direction. The first and second fluid flows cooperate to cool the surface.

Abstract: A heat exchanger is provided for warming fuel prior to introduction of the fuel to an engine, the heat exchanger including: a fuel inlet and a fuel outlet; a heat exchange matrix having heat transfer components past which the fuel flows between said inlet and said outlet and which are arranged to be heated; and swirl inducing means arranged between said inlet and said matrix arranged to cause fuel from said inlet to swirl prior to entering said matrix. By causing the fuel to swirl prior to entering the heat exchange matrix, entrained ice in the fuel can be caused to concentrate at an outer region of the heat exchanger thereby allowing fuel to continue to flow through the heat exchanger to the engine even when ice is present in the fuel.

Abstract: Described herein are devices and methods for thawing frozen biological products efficiently without harming the products.

Abstract: The present invention relates to an exhaust gas cooler (1), in particular for an exhaust gas recirculation system of an internal combustion engine, preferably of a motor vehicle, comprising an exhaust gas inlet (2) which is connected in a communicating manner with an inlet chamber (4), an exhaust gas outlet (3) which is connected in a communicating manner with an outlet chamber (5), a plurality of exhaust gas pipes (7) which are configured as flat pipes, extend parallel to each other through a coolant chamber (8) and are connected in a communicating manner on one side to the inlet chamber (4) and on the other side to the outlet chamber (5), a coolant inlet (9) which is connected in a communicating manner to the coolant chamber (8), and a coolant outlet (10) which is connected in a communicating manner to the coolant chamber (8).

Abstract: The invention relates to a flow channel having a mixing insert and a plurality of tubes guided parallel to the longitudinal axis of the flow channel over the length of the mixing insert, each mixing insert including at least twenty-eight pairwise crossed multi-wall sheets, the ratio of the width of the multi-wall sheets to the inside diameter of the flow channel being no more than 0.25, the ratio of the length of the mixing insert to the inside diameter of the flow channel being no less than 0.4, and the angle of the multi-wall sheets to the longitudinal axis of the flow channel being 30° to 60° and the ratio of the intermediate spacing of neighboring planes to the inside diameter of the flow channel being no more than 0.3, and to the inside diameter of the tubes being less than 6.

Abstract: A refrigerator having a freezer compartment and a refrigerator compartment that circulates two individual refrigerating cycles using two compressors so as to individually cool the freezer compartment and the refrigerator compartment. The refrigerator includes two compressors, two condensers, two expansion valves, and two evaporators. One of the two condensers is disposed in a machine compartment and the other condenser is disposed outside the machine compartment so that a heat dissipation effect of the machine compartment can be improved and arrangement availability can be increased.

Abstract: An exhaust gas cooler for internal combustion engines which leads to improvements in the reliability and durability of such exhaust gas coolers. The cooler comprises a housing (1) comprising a top wall (2), a bottom wall (3) and first and second side walls (4, 5) extending longitudinally from a first end to a second end to define a void space. Wherein a plurality of cooler tubes (10?) extend longitudinally in said housing (1) and are arranged in a column from towards the bottom wall (3) to towards the top wall (2). Wherein the plane of each cooler tube (10?) is canted relative to the first and second side walls of the housing (1).

Abstract: Shell and tube heat exchangers that include a baffle arrangement that improves the temperature profile and flow pattern throughout the exchanger and/or that are integral with a reaction vessel are disclosed. Methods for using the exchangers including methods that involve use of the exchanger and a reaction vessel to produce a reaction product gas containing trichlorosilane are also disclosed.

Abstract: A method for transferring heat includes flowing a wastewater through a tank and flowing a fluid through a heat exchanger having an outer surface. The method further includes aerating the wastewater to produce a convective flow, contacting the outer surface of the heat exchanger with the convective flow to exchange heat, and cleaning the outer surface of the heat exchanger with the convective flow. A system for transferring heat includes a tank, a heat exchanger with an outer surface disposed in the tank, and a fluid flowing through the heat exchanger. Wastewater located in the tank flows over the outer surface of the heat exchanger, and a diffusion pipe disposed in the tank provides air into the tank to produce a convective flow in the wastewater.

Abstract: An active cooling assembly is described. One embodiment of the active cooling assembly includes a fin configured to enable convective heat transfer to an airflow passing over the fin. A boundary layer accumulates between the fin and the airflow, and the boundary layer includes a region of heated air attached to a side of the fin. The embodiment also includes a blade configured to oscillate proximate to the fin to shear the boundary layer that accumulates between the fin and the airflow. The region of heated air is sheared from the side of the fin so that the impedance attributable to the boundary layer of the convective heat transfer from the fin to the airflow is reduced. The fin is coupled to a stationary arm, and the blade is coupled to a swing arm. The swing arm and a spring are driven at a resonant frequency by an actuator.

Abstract: The disclosure presents a heat exchanger assembly having a first manifold, a second manifold spaced from the first manifold, a plurality of refrigerant tubes extending between and in hydraulic communication with the first and second manifolds, a plurality of corrugated fins inserted between the plurality of refrigerant tubes, and a condensate extractor having a comb baffle portion with fingers inserted between the plurality of refrigerant tubes and a conveyance portion. The comb baffle portion is configured to extract condensate from between the plurality of refrigerant tubes and the conveyance portion is configured to convey condensate away from the heat exchanger assembly.

Abstract: A heat exchanger has a plurality of chamber units. The chamber units include an inlet orifice, an outlet orifice, and a plurality of walls defining a chamber interior. The inlet receives a heat exchange medium flowing in a first flow direction in an initial line of flow. Disposed within the chamber interior is a medium directing member, having an inclined surface, which diverts the heat exchange medium from the initial flow direction so that it disperses within the chamber interior in at least two distinct flow patterns. Directional flow of the medium may be facilitated by two medium directing channels disposed within one or more of the chamber walls. Protrusion members on one or more chamber walls enhance dispersion of the heat exchange medium, causing a turbulent flow pattern within the chamber interior. The heat exchange medium exits the chamber, via the outlet, in the initial line of flow. The chambers are interconnected to form assemblies.

Abstract: Disclosed is a heat exchanger that includes a first, second, and third tube. The first tube may have a first cooling/heating medium inlet at a first end and a first cooling/heating medium outlet at a second end and the second tube is disposed about and concentric with the first tube. The second tube may have a fluid inlet on the same first end as the first tube and a fluid outlet on the same second end as the first tube. The third tube is disposed about and concentric with the second tube, and may have a second cooling/heating medium inlet on the same first end as the first tube and a second cooling/heating medium outlet on the same second end as the first tube. A clamping mechanism may be utilized to secure the tubes in their respective positions and allow the tubes to receive fluid and cooling/heating medium respectively.

Abstract: An active cooling device in the form of a torsional, oscillating synthetic jet is provided. Fins are oscillated in a manner that creates a flow of air that can be used to cool an electronic device such as a lamp. Embodiments of the active cooling device can be compact and readily incorporated within heat sinks of different sizes and configurations. The flow of air can be provided as jets of air distributed over multiple directions as may be desirable with certain electronics such as an omnidirectional lamp.

Abstract: The invention relates to a heat exchanger for a motor vehicle, comprising a first flow path (1), a deflection region (13) located downstream of the first flow path (1) and a second flow path (2) that is located downstream of the deflection region (13). The first and second flow paths (1, 2) can be traversed by a fluid to be cooled and can be surrounded by a coolant to dissipate heat. The second flow path (2) has a flow resistance that differs from that of the first flow path (1).

Abstract: The invention relates to a heat exchanger for the exchange of heat between first and second fluids. The heat exchanger includes first circulation canals for the circulation of the first fluid in a first direction of circulation (D1), and second circulation canals for the circulation of the second fluid, and perturbation walls arranged in the second circulation canals for the second fluid and having perturbators that perturb the flow of the second fluid. The perturbation walls respectively have at least one dividing rib. The at least one rib extends in a second direction (D2) substantially perpendicular to the first direction in which the first fluid circulates, and over a predefined distance of the wall that is less than the total width of the wall in the second direction, so as to define at least two circulation passes for the second fluid substantially perpendicular to the circulation of the first fluid.

Abstract: A heat pipe heat dissipating device includes a chamber; a rotary shaft positioned within the chamber; an isolating member affixed to the rotary shaft; and a nozzle provided on the isolating member, wherein the nozzle directs the flow of a refrigerant vapor and prompts the rotary shaft and the isolating member to rotate. The heat pipe heat dissipating device can operate with a self-driving operation. A heat pipe heat dissipating method is also provided.

Abstract: A heat exchange system includes a first flow passage and a second flow passage. The heat exchange system is configured to transfer heat between a first fluid flowing through the first flow passage and a second fluid flowing through the second flow passage. The first flow passage includes an inlet header, a plurality of tubes, and an outlet header. The inlet header includes a plurality of header-tube transition portions configured to allow the first fluid to flow from the inlet header and into the tubes, the plurality of header-tube transition portions each including a smoothly curved inlet portion and a tapered tube connection portion.