A method of operating a heat exchanger is disclosed in which an electric field is applied to a hydrophobic surface having condensed water droplets thereon to reduce a contact angle between the individual droplet surfaces and the hydrophobic surface, and to increase droplet surface energy to a second surface energy level. The electric field is removed to increase the contact angle between the individual droplet surfaces and the hydrophobic surface, and to reduce droplet surface energy to a third surface energy level. The third surface energy level is greater than the first surface energy level and greater than a surface energy level for a free droplet. A portion of the droplet surface energy is converted to kinetic energy to detach droplets from the hydrophobic surface. The detached droplets are removed from the heat rejection side fluid flow path.

A vehicle system is disclosed. The vehicle system includes an automatic transmission fluid cooling conduit. The automatic transmission fluid cooling conduit includes an inlet portion, an outlet portion, and an elbow portion connecting the inlet and outlet portions and having an inner surface defining a cavity in fluid communication with the inlet and outlet portions. The automatic transmission fluid cooling conduit also includes an oleophobic or hydrophobic coating on the inner surface. The oleophobic or hydrophobic coating is configured to reduce eddy currents in the cavity.

A height-adjustable heat dissipation unit includes a main body, which has a top plate member, a bottom plate member, an extendable structure and a chamber. The extendable structure is a tapered structure located between and connected to the top and the bottom plate member, and consists of one or more folding sections. The chamber is provided on inner wall surfaces with a main body wick structure and is filled with a working fluid.

The disclosure provides a liquid cooling heat exchanger, comprising a first cover plate, a second cover plate and a fin, the first cover plate and the second cover plate stacked on each other so as to form a chamber therebetween, the fin disposed within the chamber, the first cover plate made of a composite material, wherein there is a bonding layer between the first cover plate and the second cover plate, and the bonding layer has a melting point lower than melting points of the first cover plate, the second cover plate and the fin. The disclosure also relates to a method for making the liquid cooling heat exchanger.

Heat exchange structure. A hydrophilic, thermally conductive porous medium includes nanostructures formed substantially uniformly throughout the porous medium providing a balance of capillary and viscous forces to self-regulate a liquid-vapor contact line. A suitable porous medium is copper. A method for making the structure is also disclosed.

Heat exchange structure. A hydrophilic, thermally conductive porous medium includes nanostructures formed substantially uniformly throughout the porous medium providing a balance of capillary and viscous forces to self-regulate a liquid-vapor contact line. A suitable porous medium is copper. A method for making the structure is also disclosed.

The invention relates to a cylindrical air condenser having a heat exchanger which has a cylindrical or polygonal shape that develops in a vertical direction (Z) from a base or bottom to a top, and a suction device provided with a motorized fan housed in a frame arranged on the top of the heat exchanger. The cylindrical condenser includes a distributor element, housed inside the heat exchanger coaxially therewith. The distributor element has a plurality of conduits arranged coaxially one to the other, and have a progressively increasing height from the top to the bottom of the heat exchanger and a progressively decreasing transversal dimension. The configuration of the distributor element is such that, starting from the top towards the base of the heat exchanger, a plurality of through openings (A1-A6) whose areas are nominally identical are defined therein in the vertical direction (Z).

Provided are a heat pipe capable of preventing the corrosion of a container and the generation of a hydrogen gas caused by a working fluid containing water even if the container is subjected to plastic deformation such as bending or an object to be cooled having a large amount of heat generation is thermally connected, and a method for manufacturing the heat pipe.

The heat pipe includes a container including a container substrate and a working fluid enclosed in the container. The working fluid contains water. The heat pipe includes a first film containing tin and/or a tin alloy on at least an inner surface of the container substrate and a second film formed on at least a part of a surface of the first film and containing an oxide and/or hydroxide containing tin.

A tube for a heat exchanger core bears a micro texture imprinted on an outer surface of the tube. The micro texture having depth of 0.01 mm to 0.03 mm and is thus hardly visible by a naked eye. When the tube is made of cladded metal strip material, the micro texture may have a depth that may be slightly greater than the thickness of the cladding. For folded tubes, an entire strip surface may be covered with the micro texture so that micro texture is present on the outer surface of tube and inside tube. Alternatively, the micro texture may be imprinted after forming the tube so that the micro texture is only present on the outer surface of the tube.

Provided is an aluminum alloy clad material including an aluminum alloy core material, an intermediate layer material that is clad on one surface of the core material, and a first brazing filler metal that is clad on a surface of the intermediate layer material, the surface not being on the core material side, wherein the core material, the intermediate layer material, and the first brazing filler metal each include an aluminum alloy having a predetermined composition, the existence density of AlMn based intermetallic compounds having a circle-equivalent diameter between 0.1 and 1.0 m inclusive in the intermediate layer material before brazing heating is at least 1.010.sup.5 pieces/mm.sup.2, and the existence density of AlMn based intermetallic compounds having a circle-equivalent diameter between 0.1 and 1.0 m inclusive in the intermediate layer material after brazing heating is at least 1.010.sup.4 pieces/mm.sup.2. Further provided is a method for producing the aluminum alloy clad material.