This disclosure describes single and multi-layer woven meshes designed to enable sucking flow condensation and capillary-driven liquid film boiling, respectively, for instance, in use in heat spreaders. The single-layer woven meshes can include a nanostructure coating and a hydrophobic coating, while the multi-layer meshes can include a microcavity coating and optionally a hydrophilic coating.

Particular embodiments described herein provide for an electronic device that can be configured to include a vapor chamber that includes ionized fluid and an adjustable polarization layer coupled to the vapor chamber. The adjustable polarization layer can be used to direct a flow of the ionized fluid in the vapor chamber towards one or more heat sources. In some examples, the ionized fluid is ionized water and the adjustable polarization layer is polyester (PET) film that includes a plurality of electrode stripes.

Provided is a heat transport device that has high heat transport capability despite being small and lightweight. The heat transport device includes a flat plate-shaped base having a heat receiving surface that contacts a heating element, multiple flow paths that extend in the base so as to be approximately in parallel with the heat receiving surface, and working fluid sealed in the flow paths. The base is formed of a photocurable synthetic resin. The flow paths have multiple concave grooves formed on the inner circumferential walls of circular main flow paths. The grooves are disposed so as to be inclined with respect to the axial direction of the flow paths.

A heat transfer arrangement for use with an immersion cooling system. A support is configured to contact a heat transfer device such as a vapor chamber or spreader plate to stiffen the heat transfer device and urge the heat transfer device into contact with a heat generating device. The support includes an arm that has a first portion that extends toward a central area of the heat transfer device over and out of contact with the heat transfer device and a second portion that contacts the heat transfer device within the central area. The arm can avoid contact with the heat transfer device, including surfaces having a boiling enhancement coating configured to transfer heat to a cooling liquid.

The group of inventions relates to heat exchange apparatus, and more particularly to condenser devices. The technological result of the group of inventions is that of reducing the risk of an increase in thermal resistance between the tube-side and shell-side heat transfer fluids of a shell and tube condenser. A condenser comprises a housing with tubes that have grooves on the outer surface thereof, baffles, and inlet and outlet manifolds for tube-side and shell-side heat transfer fluids. In contrast to the prior art, the tubes are coated on the outside with a material having a low wetting coefficient, and the distance between the baffles decreases from the shell-side heat transfer fluid inlet manifold to the shell-side heat transfer fluid outlet manifold. The condenser further differs from the prior art in that the tubes have protuberances on the inner surface thereof and are coated on the inside with a material having a high adhesion resistance coefficient.

Disclosed herein is a hollow tube comprising two ends, one end adapted to receive a fluid and the other end adapted to discharge the fluid, where the hollow tube has an interior surface and an exterior surface and a curable composition is disposed about at least a portion of the exterior surface of the hollow tube, where the curable composition comprises before cure: a curable component, a thermally conductive component, a phase change material, and a cure system.

This disclosure describes single and multi-layer woven meshes designed to enable sucking flow condensation and capillary-driven liquid film boiling, respectively, for instance, in use in heat spreaders. The single-layer woven meshes can include a nanostructure coating and a hydrophobic coating, while the multi-layer meshes can include a microcavity coating and optionally a hydrophilic coating.

A heat exchanger disclosed in the present disclosure includes a first collecting pipe, a second collecting pipe, a number of heat exchange tubes, at least one fin and a hygroscopic colloid. The heat exchange tube has a pipe wall and a refrigerant flow channel for a refrigerant to circulate. The heat exchange tube has a first end and a second end. The refrigerant flow channel extends from the first end to the second end along an extension direction of the heat exchange tube and extends through the heat exchange tube. The hygroscopic colloid is adhered to at least part of an outer surface of the heat exchange tube and/or the fin. The present disclosure also discloses a heat exchange system having the heat exchanger and a method for making the heat exchanger. The hygroscopic colloidal material of the present disclosure is friendly to metal surfaces.

Generally, management of refrigerant in an evaporator of an HVAC chiller is described. Methods, systems, and apparatuses to manage refrigerant in an evaporator can include one or combination of the following approaches: (1) by use of a refrigerant displacement array to physically prevent refrigerant from residing where the array is positioned (2) by control of the interstitial velocity of refrigerant flow within the volume of the shell of an evaporator; (3) by a phase biased distribution of the refrigerant mixture, so that a gaseous portion is uniformly distributed into the evaporator shell, while liquid refrigerant and oil is distributed into the evaporator shell at a designated area; and (4) by preventing or reducing the occurrence of foaming inside the evaporator through anti-foaming surfaces, such as by the use of refrigerant phobic and lubricant phobic material(s). Refrigerant management can in turn improve the thermal performance and overall efficiency of the evaporator.

Coatings for enhancing performance of materials surfaces, methods of producing the coating and coated substrates, and coated condensers are disclosed herein. More particularly, exemplary embodiments provide chemical coating materials useful for coating condenser components.