Abstract: A hydrophilic composition and a hydrophilic member obtained by using the composition are provided, which composition contains a hydrophilic polymer having a specific structure of having a hydrolysable group in the side chain thereof in a content of 50% by weight or more based on the weight of the solid components and further contains an additive having an antifungal property, and which composition shows excellent water resistance and maintains the high hydrophilicity even after being stored for a long period under an environment of high temperature and high humidity.

Abstract: A heat dissipation device according to the present invention includes an inner tube to which heat from LED modules is to be transferred, first fins protruding from an outer surface of the inner tube in a direction crossing the outer surface, and an outer tube covering the inner tube. Moreover, heat is transferred from the surfaces of the inner tube, outer tube and first fins which form ventilation paths (medium paths) to the air flowing at an increased flow rate by a stack effect.

Abstract: Improvements in tubes, which increase the heat exchange capacity of tubular heat exchangers using the tubes, are described. These improvements involve the use of one or more external surface enhancements, optionally combined with an internal enhancement and/or differing tube geometries. These improvements apply, for example, to internal condensers, including those in which the tube bundles are oriented vertically, in vapor-liquid contacting apparatuses such as distillation columns.

Abstract: One embodiment comprises an apparatus with an evaporative unit for a refrigerant having a flow direction opposing the airflow direction and an adjustable airflow rate to utilize to produce both cold/dehumidified exit air and warmed exit refrigerant for high efficiency and to maintain an airflow sufficient to avoid freeze-up of evaporative unit or freeze-up to an extent that blocks the airflow. This may produce low humidity even when the room thermostat is set warm (e.g. 85 F) and 5%-30% lower A/C bills. Other embodiments comprise systems and methods related to the adjustable airflow. A further embodiment comprises a controller to adjust the humidity in an air-conditioned space to produce air, which is both temperature and humidity controlled.

Abstract: Powder coated heat exchange elements for a heat exchanger. Powder coating provides improved protective coating on surfaces of heat exchange elements. In many applications, the heat exchange elements are subjected to harsh operating conditions that promote corrosion. Traditional enamel coating tends to fracture when subjected to mechanical stresses thereby allowing corrosion inducing agents to penetrate and corrode the underlying surfaces. Powder coating reduces breaches in the protective layer. Powder coating may be adapted to withstand high temperatures so as to make them suitable for use in harsh operating environments. One such environment can be found in the processing of flue gas from fossil burning power generators, where the flue gas has a relatively high temperature and high sulfur content.

Abstract: An inclined waved board and a heat exchanger thereof. The inclined waved board includes a board body composed of continuous waved sections. The waved sections are respectively inclined from a first side to a second side, inclined from the first side to a third side and inclined from a fourth side to the second side of the board body by an inclination. The waved sections define multiple raised sections and recessed sections on two faces of the board body. The heat exchanger is composed of multiple board bodies arranged adjacent to and in parallel to each other. Each two adjacent board bodies define therebetween a flow way. When fluids flow through the flow ways, the inclined waved sections enhance turbulence intensity and guide the fluids to produce secondary flows along the cross-sections of the flow ways so as to form dynamic three-dimensional swirling flow structure in the waved flow ways.

Abstract: An organic rankine cycle system for recovering and utilizing waste heat from a waste heat source by using a closed circuit of a working fluid is provided. The organic rankine cycle system includes at least one evaporator. The evaporator further includes a surface-treated substrate for promoting nucleate boiling of the working fluid thereby limiting the temperature of the working fluid below a predetermined temperature. The evaporator is further configured to vaporize the working fluid by utilizing the waste heat from the waste heat source.

Abstract: Methods and a system for shielding cooling tubes in a radiant syngas cooler. The heat shields may prevent direct contact between heated syngas and the cooling tubes. The heat shield may be mounted to a header that also attaches to the cooling tubes. The heat shield may also be separated from the cooling tubes or, alternatively, the heat shield may be coated onto the cooling tubes. Furthermore, prolonged exposure to the heated syngas may corrode the heat shield.

Abstract: The invention provides a method and apparatus for integrating the heat transfer zones of plate fin and tube and finned tube exchangers and a catalytic mass transfer zone. The invention also provides a method for in situ regeneration of existing coated surface and augmentation of existing coated surface, or catalyst performance.

Abstract: The present invention relates to a heat exchanger for the supply of oxygen or of a gas mixture containing at least 50% oxygen, the temperature at the outlet of the exchanger not being below 300° C., it preferably being above 400° C., the oxygen or the oxygen-rich gas feeding one or more burners of a glass melting furnace, the heat of the combustion gases being used directly or indirectly to heat the oxygen or the oxygen-rich gas in the exchanger, in which the exchange power is between 20 and 300 kW, preferably between 40 and 250 kW and particularly preferably between 80 and 170 kW.

Abstract: The invention relates to a heat exchange system (1) having a heat exchanger (2) for the exchange of heat between a fluid (3) and an environmental atmosphere. The heat exchanger (2) in this respect includes an inlet passage (4), an outlet passage (5) and a heat transfer device (6) having a plurality of micro-passages (61), with the inlet passage (4) being in flow communication with an inlet segment (62) of the heat transfer device (6) and the outlet passage (5) being in flow communication with an outlet segment (63) of the heat transfer device (6) such that the fluid (3) for the exchange of heat with the environmental atmosphere can be supplied from the inlet passage (4) via the inlet segment (62), through the plurality of micro-passages (61) of the heat transfer device (6), and via the outlet segment (63) to the outlet passage (5). In accordance with the invention, the heat exchange system (1) includes a compensation means (7) for the compensation of thermomechanical strains.

Abstract: The invention relates to a heat exchanger, particularly for a motor vehicle, comprising at least one duct (24-29) through which a fluid flows and of which at least some section have a curved shape. Preferably, said heat exchanger comprises several ducts through which a fluid flows and of which at least some sections have a curved shape. In order to increase the heat exchanging capacity, the duct (24-29) of which at least some sections have a curved shape is provided inside a profiled extruded element.

Abstract: To provide a hydrophilic coating composition excellent in hydrophilicity, wear resistance, transparency, storage stability, antifogging properties, antifouling properties, visible light transmittivity, adhesion properties, chemical resistance, weather resistance, and water resistance and a hydrophilic member using the composition. The hydrophilic coating composition has (A) a ternary copolymer having a1) a repeating unit having a hydrophilic group, a2) a repeating unit having a hydroxyl group, an epoxy group, an isocyanato group, a blocked isocyanato group, a carboxylic acid anhydride group, or an amino group, and a3) a repeating unit having a hydrolyzable silyl group; and (B) a metal complex catalyst, wherein a content of the repeating unit a1) having a hydrophilic group is 50 mol % or greater.

Abstract: Light-weight, heat-managing structures feature open-cell lattice, honeycomb, and/or corrugated (prismatic) arrangements in their substructures, combined with heat pipe/heat plate arrangements for managing heat to which the structures are subjected. The structures are well suited to aerospace applications and may be employed in the leading edge of wings or other airfoil-shaped components; gas turbine engine components; rocket nozzles; and other high-heat, high-stress environments.

Abstract: In a heat exchanger having a core portion in which aluminum flat tubes and aluminum fins are disposed alternatively and brazed with each other, each fin has one side portion located at one side of the tube and the other side portion located at the other side of the tube. The one side portion of the fin is higher in pitting potential than the other side portion of the fin, and the pitting potential difference between the one side portion of the fin and the other side portion of the fin is 40 to 200 mV. The pitting potential difference can be formed by the Zn concentration difference in the aluminum alloy constituting the fin.

Abstract: Heat transfer tubes for evaporators in air conditioning and refrigeration systems, each tube including: a tube body (1); outer fins (2) extending on an outer wall surface of the tube body (1) and having outer fin walls opposite to the outer fin walls of the adjacent outer fins; channels (6) located between the adjacent fins (2) so as to constitute channel chambers; fin top platforms (3) on respective tops of the outer fins (2), the fin top platforms (3) including fin top edges (3a) extending from both sides of the fin top platforms (3) so that the channel chambers form a cavity structure as a whole; channel chamber openings constituted by gaps between the adjacent fin top edges (3a) of the fin top platforms (3) of the outer fins; and lateral fins (4) arranged on portions or substantially middle portions of the outer fin walls of the outer fins (2) in a height direction of the outer fins (2) and at intervals in an spreading direction of the outer fins (2), so that the cavity structure is formed into a double c

Abstract: A heat exchanger includes one or more passages and one or more metal foam sections adjacent the passage to promote an exchange of heat relative to the passage. The metal foam section includes a nominal thermal conductivity gradient there though to provide a desirable balance of heat exchange properties within the metal foam section.

Abstract: A method for in-situ treatment of a metallic surface utilizing a nanoparticle dispersion to increase at least one of (i) the critical heat flux. (ii) the boiling heat transfer rate, or (iii) the corrosion resistance of the metallic surface when in operation without a nanofluid heat transfer liquid, comprising: (1) cleaning the metallic surface: (2) conditioning the metallic surface to enhance nanoparticle binding to the metallic surface by applying a polymeric binding agent; (3) forming at least one thin film layer of nanoparticles on the metallic surface by contacting the nanoparticle dispersion with the metallic surface at a temperature and pressure sufficient to boil the nanoparticle dispersion; and, optionally (4) curing the nanoparticle layer by heating the metallic surface to a temperature higher than the temperature sufficient to boil the nanoparticle dispersion.

Abstract: Disclosed are coolants comprising brazed metal corrosion inhibitors. In one embodiment, the disclosed brazed metal corrosion inhibitor will comprise a polycarboxylic acid functional compound having the structure: wherein R1, R2, R3, and R4 are each independently selected from the group consisting of H, OH, COOH, C1-C10 alkyl groups, glycol esters, anhydride groups, —COOM, and combinations thereof, wherein M is at least one of H, alkali metal ions, alkali earth metal ions, NH4+, amines, imidazoline, polyalcohol esters, C1 to C12 alkyl groups, and combinations thereof; wherein (1) at least three of R1, R2, R3, and R4 contain the group —COOM, wherein M is defined above; or (2) at least two of R1, R2, R3, and R4 contain an anhydride group, and at least one of R1, R2, R3, and R4 contain the group —COOM, wherein M is defined above.

Abstract: The present invention discloses a condensing heat-exchange copper tube for a flooded type electrical refrigeration unit, which comprises a smooth surface portion, a finned portion provided with plurality of fins and a transitional portion connecting the smooth surface portion to the finned portion. Said fin includes a fin base close to the outer surface of the heat-exchange tube and a fin top away from the outer surface. Said fin is further provided with a secondary fin at the central portion of the fin and a third fin at the top portion of the fin, wherein a certain distance is provided between two axially adjacent secondary fins or two axially adjacent third fins. Secondary fins as well as third fins according to the invention further increase the heat transfer area for the heat-exchange tube. Meanwhile, secondary fins and third fins help to attenuate the condensate film such that the condensate film is substantially eliminated, and vapor condensation and heat transfer may be carried out in a better way.

Abstract: In a method for enhancing heat dissipation effect of a heat-dissipating fin, a plurality of heat-conducting particles are affixed directly and contactingly to a part of a surface of the heat-dissipating fin to increase the surface area of the heat-dissipating fin so as to reduce thermal boundary layer effect. A heat-dissipating fin and a heat-dissipating device including a plurality of the heat-dissipating fins are also provided.

Abstract: A cooling device comprises an upper surface configured to contact the baseplate, an inlet manifold configured to receive a coolant, an outlet manifold configured to exhaust the coolant, and at least one set of millichannels in the upper surface. The at least one set of the millichannels defines at least one heat sink region with at least one groove about one or more millichannels in the respective heat sink region with the groove configured to receive a seal. The at least one heat sink region establishes direct contact of the coolant with the baseplate, and the millichannels are configured to receive the coolant from the inlet manifold and to deliver the coolant to the outlet manifold. An apparatus and a stack are also presented.

Abstract: The present invention provides a thermal interface with a first and a second face that are in contact to each other by a thermal conducting material. A first face includes grooves that are at least partly filled with the thermal conducting material, wherein at least two types of grooves are arranged, namely first grooves having a larger width than second grooves. The first face comprises an array with protrusions that are confined by the second grooves, the array being divided by the first grooves into sub-arrays.

Abstract: A method and system for enhancing the heat transfer of turbine engine components is disclosed that includes applying a metallic coating having a high thermal conductivity to the cold side of a turbine component to enhance heat transfer away from the component. The metallic coating may be roughened to improve heat transfer. The metal coating may be a Ni—Al bond coating having an aluminum content greater than about 50 weight percent.

Abstract: The present relates to a container and to a device for indirect material cooling and to a method for producing the container according to the invention. Through the present invention a much more efficient indirect heat transfer is facilitated from the exterior of the container into the interior of the container. The improvement of the heat conductivity and of the heat transfer of centrifuge containers yields a reduction of the necessary power of the refrigeration system for cooled centrifuges. Through the higher performance of the centrifuge a higher speed can be run for identical centrifuge temperatures and/or at the same centrifuge temperature and speed, the input power of the refrigeration unit can be reduced.

Abstract: A heat-exchange medium for use in a regenerative thermal oxidizer has a coating of potassium aluminum silicate which prevents the build-up of silicon dioxide from processed gas on the surface of the ceramic heat-exchange media.

Abstract: The present invention is a patterned metal thermal interface. In one embodiment a system for dissipating heat from a heat-generating device includes a heat sink having a first surface adapted for thermal coupling to a first surface of the heat generating device and a thermal interface having at least one patterned surface, the thermal interface being adapted to thermally couple the first surface of the heat sink to the first surface of the heat generating device. The patterned surface of the thermal interface allows the thermal interface to deform under compression between the heat sink and the heat generating device, leading to better conformity of the thermal interface to the surfaces of the heat sink and the heat generating device.

Abstract: The invention relates to a method for production of a layer composite, comprising a metal support substrate and a silicate layer with the following method steps: a) production of the metal support substrate, b) production of silicate crystals and/or silicate particles by means of solvothermal synthesis, said solvothermal synthesis being carried out in at least one ionic liquid and c) coating of at least one surface of the metal support substrate with the silicate crystals and/or silicate particles produced in b).

Abstract: A modular construction micro-reactor with parallel microchannels on fluid guide plates for chemical reactions, but not for evaporation purposes is known. A modular construction falling film evaporator is disclosed, comprising a stack of alternate gap-like evaporation chambers and sheet-like evaporator modules with an assembly of parallel microchannels, whereby the evaporation chambers are open above and/or below across the whole width of the module and the stack is arranged in a container. The falling film evaporator is used in a method for obtaining a gaseous phase from a liquid medium on a technical scale and is suitable for the concentration of thermolabile solutions and rapidly adjustable production of a gas stream.

Abstract: The difference in linear thermal expansion coefficient between the fins (57) and the adsorbent layer (58) is made smaller than the difference in the linear thermal expansion coefficient between the fins (57) and the adsorbent.

Abstract: A method for producing a condenser for a thermal power plant is provided. First, the production method includes fitting a condenser tube in a carrier for a condenser tube bundle of the condenser. Then, the fitted condenser tube is coated with a hydrophobic coating. Coating the fitted condenser tube includes positioning a spray mechanism on the carrier, spraying on the hydrophobic coating using a spray mechanism, and moving the spray mechanism during spraying at a uniform rate. In another aspect, a device is provided. Also, a condenser is provided in an aspect.

Abstract: A heat exchanger tube comprising an Al alloy extruded tube, and a flux layer including Si powder, Zn-containing flux, and binder formed on an outer surface of the Al alloy extruded tube, wherein an amount of the Si powder applied on the Al alloy extruded tube is in a range of 1 g/m2 or more and 5 g/m2 or less, an amount of the Zn containing flux applied on the Al alloy extruded tube is in a range of 3 g/m2 or more and 20 g/m2 or less, and the Si powder has a particle diameter distribution such that 99% particle diameter is 5 ?m or more and 20 ?m or less, and an amount of coarse particle having a diameter of not smaller than 5 times (D99) is less than 1 ppm by volume.

Abstract: A composite article (1; 10; 40) comprises a plurality of inclusions (5) of a magnetocalorically active material embedded in a matrix (4) of a magnetocalorically passive material. The inclusions (5) and the matrix (4) have a microstructure characteristic of a compacted powder.

Abstract: A tube bundle apparatus for thermal exchange operations at high pressures and temperatures, under conditions of high aggressiveness of process fluids. The tube bundle includes a series of tubes whose internal wall includes a material selected from titanium, zirconium, or an alloy thereof, resistant to aggression of fluids, in which at least one of access chambers to the tube bundle is delimited by a wall including at least the following three metallic layers in succession: a) an external layer for tolerating pressure load, subject to corrosion by contact with the highly aggressive process fluid; b) an intermediate layer of stainless steel; (c) an anticorrosive lining in contact with the highly corrosive fluid, of a material selected from titanium, zirconium, or an alloy thereof. The apparatus can be particularly used as an exchanger/reactor, for example as a stripper, in the high pressure cycle of synthesis processes of urea.

Abstract: In a highly efficient recuperator burner, which comprises at least one combustion chamber for warm-up operation and is otherwise set up for FLOX® operation, and a recuperator for preheating combustion air by means of thermal exhaust gas energy in a counter-current heat exchange mode via heat exchanger pipes, each heat exchanger pipe has, in a heat exchange section thereof, a flattened gap cross-section and, at its end facing a volume to be heated, a nozzle cross-section, which differs from the flattened gap cross-section of the heat exchanger pipe.

Abstract: The present invention relates to a heat exchanger including a partitioning plate and flow channels of at least two systems which are partitioned by the partitioning plate, in which the partitioning plate is made of a clad sheet having a base material made of stainless steel or a nickel-based alloy, and a clad layer having brazing properties and corrosion resistance to a corrosive fluid, an entire surface of the base material which is exposed to the flow channel of at least one system being coated by the clad layer. According to the present invention, the heat exchanger, in which the corrosive fluid flows, can be reduced in size, and the performance thereof can be enhanced. Furthermore, it is possible to simplify the manufacturing process of the heat exchanger.

Abstract: As conventional heat exchange modules, adsorptive agents of an inorganic type such as silica gel, zeolite, active alumina, active carbon and molecular sieve have been used. While these adsorptive agents have characteristics of high moisture absorptive ability and easy handling, they have problems of durability, regenerating temperature and generation of bacteria or fungi. An object of the present invention is to solve these problems which are noted in the inorganic adsorptive agents and to provide a heat exchanger module of a energy conservation type having a high heat exchange efficiency and a method for the manufacture thereof. The present invention is a heat exchange module of a sorptive type, characterized in that, a moisture absorptive layer in which a sorptive agent of an organic polymer type comprising organic polymer having hydrophilic polar group and cross-linking structure in a molecule is an essential component, saturated moisture absorbing rates at 20° C.

Abstract: A coating composition including ultrafine silica particles having an average particle diameter of 15 nm or less and fluororesin particles, in which ultrafine silica particle content is 0.1 to 5 mass %, and the mass ratio of the ultrafine silica particles to the fluororesin particles is 70:30 to 95:5. According to the coating composition, there is provided a coating film which makes it possible to readily coat the surfaces of various articles without impairing the color tone and the texture and which is excellent in antisoiling performance and durability.

Abstract: An article comprising a hybrid surface for promoting dropwise liquid condensation is disclosed herein. The article comprises an array, wherein the array comprises a plurality of raised structures. The plurality of raised structures comprise at least one geometric shape. The plurality of raised structures also comprise a hydrophobic surface. The article also comprises a plurality of hydrophilic pores interspersed between the plurality of raised structures. Methods for constructing a hybrid surface for promoting dropwise liquid condensation are disclosed herein. A heat transfer device comprising a hybrid surface for promoting dropwise liquid condensation is also disclosed herein.

Abstract: Disclosed is a heat exchanger comprising a boiling passage and cooling passage defined by opposite sides of metal walls. Layers of brazing material between the metal walls and a spacer member bond components of the heat exchanger together. An enhanced boiling layer (EBL) comprising metal particles bonded to each other and to a boiling side of the metal wall provides nucleate boiling pores to improve heat transfer. The EBL has a melting temperature that is higher than the melting temperature of the brazing material. Also disclosed is a process for assembling the heat exchanger.

Abstract: Provided are a heat control device and a method of manufacturing a heat control device. The method of manufacturing a heat control device having an envelope used as a path of a working fluid that absorbs/dissipates heat by a latent heat transfer and a groove formed in an inner wall of the envelope and generating a capillary force moving the working fluid, wherein the method includes: providing first and second templates each including a protruding portion having a shape corresponding to the groove; forming first and second deposition films by depositing metal on the first and second templates; stacking first and second metal plates respectively on the first and second deposition films; burning out the first and second templates from the first and second metal plates; and forming the envelope by combining the first and second metal plates.

Abstract: A high-temperature and high-pressure corrosion-resistant process heat exchanger for a nuclear hydrogen production system decomposes sulfite (SO3) using heat from a high-temperature gas-cooled reactor to thereby produce sulfide (SO2) and oxygen (O2). The process heat exchanger comprises second and third system coolant channels, each of which is defined by a heat transmission fin, which is bent in a quadrilateral shape, and heat transmission plates, and has increased corrosion resistance thanks to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. The third system coolant channel includes reaction catalysts for SO3 decomposition, and is made of a super alloy. Thus, a system differential pressure between the second and third system coolant channels can be greatly maintained at a high temperature of 900° C. or higher.

Abstract: Methods of applying an ozone-depleting catalytic coating to a heat exchanging device for producing a durable surface with optimal ozone depletion characteristics are provided. An adhesively coated metallic substrate is exposed to a concentration of ozone-depleting catalytic particles, wherein the receptive surface of the coated substrate binds the ozone-depleting catalytic coating.

Abstract: Heat exchange device with a boiling surface comprising porous surface layer arranged on a solid substrate, the porous surface layer comprises a porous wall structure defining and separating macro-pores that are interconnected in the general direction normal to the surface of the substrate and have a diameter greater than 5 ?m and less than 1000 ?m wherein the diameter of the pores gradually increases with distance from the substrate wherein the porous wall structure is a continuous branched structure.

Abstract: According to the invention, in order to prevent a film from forming which obstructs the transfer of heat in heat exchanger pipes, the heat exchanger pipe comprises an external side which is adjacent to the external surface and which is impinged upon by a steam medium, and an inner side which is adjacent to an inner surface and which is impinged upon by a coolant, such that the outer surface is provided with a first layer which reduces the adhesion of the steam on the outer surface and/or the inner surface is provided with a second layer which reduces the adhesion of a coolant to the inner surface and which is embodied as a biocidal layer. The invention relates to a heat exchanger and to the use thereof.

Abstract: The invention relates to a combined thermal protection and surface temperature control apparatus. In one embodiment, a combined thermal protection and surface temperature control apparatus comprises a porous member having an entrance side, a separate exit side, and a plurality of thermally conductive plugs disposed in the porous member. One or more coolant entrance channels extend through the entrance side, extend part-way through the porous member, and end within the porous member before reaching the exit side. Conversely, one or more coolant exit channels begin within the porous member, extend through a portion of the porous member, and extend through the exit side. The coolant entrance and exit channels may be parallel and may alternate. The channels may only extend across a portion of the thickness of the porous member.

Abstract: A heat conduction unit having an improved laminar is provided. The heat conduction unit of the present invention includes a pair of exhaust and intake layers crossing each other for exchanging heat between exhaust and intake airflows; and a laminar interposed between the exhaust and intake layers and having a having a fiber synthetic fabric layer with a high water absorbancy and heat conductivity. The fiber synthetic fabric layer is made by densely weaving a microfiber in the form of a fabric, the fabric being weaved by adding micro metal fiber, by adding microfiber plated with metal, or by adding at least ones of micro copper molecules, aluminum molecules, carbon black molecules, carbon nano tube molecules, titanium dioxide (TiO2) molecules, and nano-silver molecules, to a raw material resin of the microfiber.

Abstract: An illumination device includes a light emitting element, and a plurality of radially disposed radiation fins for dissipating heat generated by the light emitting element. An aperture may be formed between adjacent ones of the radiation fins for allowing light from the light emitting element to pass therethrough. The radiation fins may further include a reflection surface for reflecting light which is blocked by the radiation fins when passing through the aperture.

Abstract: Heat exchanger plates for indirect evaporative coolers, of the type having a dry side having low permeability to an evaporative liquid and formed to allow a product fluid to flow over a heat transfer area of its surface, a wet side designed to have its surface wet by an evaporative liquid, and formed to allow a working gas to flow over its surface to evaporate the evaporative liquid, are formed such that the wet side comprises a hydrophobic fiber sheet and the dry side comprises a non-permeable sealing layer on the sheet. Heat seal strips are formed at the inlet and outlet of the plates and air flow perforations are formed through the plates.

Abstract: Method of producing a wall, in particular a micro heat exchanger for semiconductor devices or microsystems, and micro heat exchanger, in which particles are embedded in a layer, some of which have a part anchored into a wall of said layer and a part projecting from this wall after removal of material.