An example apparatus is disclosed that includes a base and a wickless capillary driven constrained vapor bubble heat pipe carried by the base. The wickless capillary driven constrained vapor bubble heat pipe includes a capillary, and the capillary has a longitudinal axis and a cross-sectional shape orthogonal to the longitudinal axis. The cross-sectional shape includes a first curved wall, a second curved wall, a first corner between a first straight wall and a second straight wall, and a second corner between a third straight wall and a fourth straight wall.

A vapor chamber heatsink assembly, under vacuum, having a working fluid therein, comprising a plurality of heatsink fins and a vapor chamber is provided. The vapor chamber and the plurality of heatsink fins each comprise a plurality of obstructers defining a plurality of braided channels therein. Thus, the condenser regions of the vapor chamber are expanded to the plurality of heatsink fins. When heat from a greater temperature heat source and a lower temperature heat source is applied to the vapor chamber, via the plurality of obstructers and braided channels, the working fluid and liquid vapor travel therethrough, providing an effective phase change mechanism to the greater temperature heat source, while concurrently, hindering agglomeration of working fluid thereto. An effective phase change mechanism is also concurrently provided to the lower temperature heat source due to the non-agglomeration of working fluid to the greater temperature heat source.

A heat exchanger includes a first header tank, a second header tank, and a plurality of tubes. The plurality of tubes is arranged in braided pairs that extend in and are configured to direct a fluid between the first and second header tanks in a first direction. Each of the plurality of tubes have opposing ends that are respectively secured to the first and second header tanks via elbows such that the plurality of tubes are offset from the first and second header tanks.

A double-sided roll bond condenser has a main body, an interposition section, and a neck portion. The main body is an upright board and has two side surfaces. Two filling structures are respectively protruded from the two side surfaces of the main body. The interposition section is formed at a bottom portion of the double-side roll bond condenser, and is a U-shaped folded structure. The U-shaped folded structure protrudes from one of the two side surfaces of the main body. The neck portion is located between the main body and the interposition section.

A heat exchanger includes a body defining a flow channel, and a pin extending across the flow channel, the pin including an at least partially non-cylindrical shape. The pin can be a double helix pin including two spiral branches defining a double helix shape. The two branches can include a uniform winding radius. The two branches include a non-uniform winding radius.

The non-uniform winding radius can include a base radius and a midpoint radius, wherein the midpoint radius is smaller than the base radius. The two branches can be joined together by one or more cross-members.

A method includes providing a first metal sheet and a second metal sheet, printing a channel pattern on the first metal sheet, bonding the first metal sheet and the second metal sheet to each other, forming a plurality of channels by introducing a fluid between the first metal sheet and the second metal sheet, introducing working fluid in the plurality of channels, sealing the first metal sheet and the second metal sheet, and forming a plurality of through holes in locations where the first metal sheet and the second metal sheet are bonded to each other. The plurality of through holes are arranged in a plurality of rows, each row including at least two through holes, and each location where the first metal sheet and the second metal sheet are bonded to each other includes a single through hole of the plurality of through holes.

A heat dissipation device is configured for a working fluid to flow therethrough. The heat dissipation device includes a base, at least one heat dissipation fin, and at least one fluid replenisher. The base has at least one internal channel configured for the working fluid to flow therethrough. The at least one heat dissipation fin having an extension channel and an inlet and an outlet is in fluid communication with the extension channel. The at least one heat dissipation fin is inserted into one side of the base, and the extension channel is communicated with the at least one internal channel through the inlet and the outlet. The at least one fluid replenisher is connected to at least one internal channel.

A heat dissipation device includes a base plate and a plurality of fins arranged on the base plate. Each fin includes a fin body including a first metal sheet and a second metal sheet coupled to each other, wherein the fin body is curved and includes a first portion and a second portion transverse to the first portion, an evaporation channel defined in the first portion, one or more connecting channels disposed in the first portion and in fluid communication with the evaporation channel, a condensation channel defined in the second portion, and one or more auxiliary channels disposed in the second portion and in fluid communication with the one or more connecting channels and the condensation channel.

A heat dissipation device includes a base plate and a plurality of fins arranged on the base plate. Each fin includes a fin body including a first metal sheet and a second metal sheet coupled to each other, wherein the fin body is curved and includes a first portion and a second portion transverse to the first portion, an evaporation channel defined in the first portion, one or more connecting channels disposed in the first portion and in fluid communication with the evaporation channel, a condensation channel defined in the second portion, and one or more auxiliary channels disposed in the second portion and in fluid communication with the one or more connecting channels and the condensation channel.

A heat-wing includes: a sealed hollow chamber including two plates and a frame connecting the two plates; a capillary structure layer closely attached to an inner surface of the chamber; and a phase transition working medium sealed in the chamber. A portion of the frame or a portion of a periphery of one of the two plates serves as an evaporation area of the heat-wing, and the rest portion of the chamber serves as a condensation area of the heat-wing. The heat-wing has an increased vapor passage area, liquid working medium flow-back passage width and condenser heat transfer area and a reduced evaporator center-to-edge distance, and is hence capable of achieving a great improvement in heat transfer limit and heat flux density.