A transfer tube for a thermal transfer device can include at least one wall having an inner surface and an outer surface, where the inner surface forms a cavity, where the at least one wall further has a first end and a second end. The first end can be configured to couple to a terminus of a heat exchanger of the thermal transfer device. The second end can be configured to couple to a collector box of the thermal transfer device. At least a portion of the at least one wall can be disposed in a vestibule of the thermal transfer device. The cavity can be configured to simultaneously receive a first fluid that flows from the first end to the second end and a second fluid that flows from the second end to the first end.

An aluminum alloy brazing sheet has a 3XXX, 1XXX or 6XXX core, an interliner and a 4XXX brazing layer without added Mg. The interliner has Bi and Mg, the magnesium migrating to the surface of the brazing sheet during brazing and reducing the aluminum oxide to facilitate brazing without flux in a controlled inert atmosphere with reduced oxygen.

An additively manufactured heat exchanger configured to transfer heat between a first fluid and a second fluid includes a first channel with a first wall configured to port flow of a first fluid and a second channel with a second wall configured to port flow of a second fluid. The heat exchanger also includes a barrier channel containing unprocessed build powder provided by the additive manufacturing process and is located between the first wall and the second wall. The barrier channel is configured to prevent mixing of the first fluid and the second fluid when one of the first wall and the second wall ruptures.

A heat-exchange pipe that is excellent in heat-exchange property in which a metal porous body is not easily dropped off form a metal pipe; which is provided with the metal pipe and the metal porous body made by joining a plurality of metal fibers bonded to an inner-wall surface of the metal pipe; at least some of the metal fibers in the metal porous body are partially bonded to the inner-wall surface of the metal pipe along a length direction, bended on the inner-wall surface of the metal pipe, and extend to leave from the inner-wall surface.

An alloy formed of aluminum, nickel, scandium and optionally one, two or more further metals. The aluminum alloy is suitable for additive manufacturing of lightweight highly thermally conductive components for aircraft, such as heat exchangers. In a first step, a powder of the described aluminum alloy is produced by additive manufacturing, such as laser melting in the L-PBF process. Large grains are able to grow epitaxially along the build direction thereby increasing phonon and electron mobility along the build direction. With this, a higher thermal conductivity can be achieved. In a second step, the preliminary part is hardened by precipitation of secondary phases at 250 to 400 C to form the hardened part. 3D-printed lightweight parts with high thermal conductivity are obtained.

A heat exchanger includes: a plurality of flat tubes each of which has a refrigerant flow passage through which refrigerant flows in an up-down direction, the plurality of flat tubes being arranged parallel to each other at intervals; a plurality of fins each of which is provided between adjacent flat tubes of the plurality of flat tubes; an upper header to which an upper end portion of each of the plurality of flat tubes is connected; and a lower header to which an a lower end portion of each of the plurality of flat tubes is connected. Lower end portions of the plurality of fins are not joined to the lower header, and a lower gap is formed between the lower end portions of the plurality of fins and the lower header.

A cooling system includes a heat exchanger having one or more rows of multiple flat tubes, louvered fins disposed between pairs of flat tubes, and special header tube connections to form a counter flow heat exchanger. Heat exchangers having multiple rows may be placed near or close to the server racks and may be in fluid communication with an outdoor heat exchanger having one or more rows. A single-phase fluid is pumped through a fluid circuit or loop, which includes the heat exchangers at the server racks and the outdoor heat exchanger. The single-phase fluid circuit including the heat exchangers at the IT racks may alternatively be in thermal communication with a water circuit that includes an outdoor fluid cooler. The flat tubes can be formed tubes with one or more channels, or extruded tubes with multiple channels. The heat exchangers include header tubes/connections, which facilitate easy fabrication and connection between rows and inlet/outlet, and lower the pressure drop.

An aluminum alloy brazing sheet has a 3XXX, 1XXX or 6XXX core, an interliner and a 4XXX brazing layer without added Mg. The interliner has Bi and Mg, the magnesium migrating to the surface of the brazing sheet during brazing and reducing the aluminum oxide to facilitate brazing without flux in a controlled inert atmosphere with reduced oxygen.

An aluminum heat exchanger includes first and second plates with inner and outer surfaces, which are joined by brazing and define at least one fluid flow passage. The first and second plates each comprise a core layer of aluminum or an aluminum alloy having a melting temperature greater than an aluminum brazing temperature. The first plate also includes a first outer clad layer defining the outer surface of the first plate. The first outer clad layer is solderable to a metal layer of an object to be cooled and includes nickel or copper. A second outer clad layer is located between the first outer clad layer and the core layer and is roll bonded to at least the second outer clad layer. A manufacturing method includes brazing first and second plates, where the layers of the first plate are roll bonded and the first plate is optionally formed before brazing.

A vaporizer for vaporizing a liquefied gas includes a first heat exchanger block having first and second linear conduits extending therethrough, a second heat exchanger block having first and second linear conduits extending therethrough, one or more heaters located between the first and second heat exchanger blocks, and an inlet capacity control valve. The heat exchanger blocks may be fabricated by extruding aluminum. The heaters may be independently powered. At least a portion of the inlet capacity control valve may be located within one of the conduits.