Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Jerome Gavillet

Hai Trieu Phan

Philippe Coronel

Pascal Fugier

Pierre Juliet

Stephane Colasson

Philippe Marty

Nadia Caney

A heat exchange structure is provided, including a primary face provided with non-through holes formed in said face, the inner surface of the holes and the surface of said primary face outside the holes being covered with nanoparticles, the inside of the holes having a non-wettability property relative to a given liquid and the surface of the face between the holes having a wettability property relative to the liquid.

Heat exchange structure and cooling device comprising such a structure

A thermogenerator including at least one thermoelement and two phase-change materials having different phase-change temperatures, the at least one thermoelement having two opposite main faces, and each of the faces is covered by one of the phase-change materials, such that the thermoelement is subject only to a temperature gradient imposed by the two phase-change materials, during a phase of heating or cooling.

Thermogenerator comprising phase-change materials

A heat absorbing device including a structure including plural individual cells delimited by an envelope made of a material that has good thermal conductivity and includes at least one phase-change material, the cells being stacked on top of one another from an end surface so that the structure extends in a direction of thermal flux, the flux being made up of two notable periodic thermal events, the structure including two different sizes of cells. The sizes of the cells are determined as a function of frequency of the thermal events of the thermal flux and a distribution of a number of cells of each size is determined as a function of amplitudes of each event.

Heat-absorbing device with phase-change material

A device forming a manometer, configured to measure pressure of a biphasic fluid in a fluidic network, including: a first channel inside which a biphasic fluid is able to flow; a second channel emerging into the first channel, wherein the second channel is blind, with each of its dimensions less than capillary length of the fluid's liquid phase, and with at least one of its lengthways wall having a surface energy gradient that decreases from its inlet to the end. The surface energy gradient enables the wetting angle of the meniscus of the fluid's liquid phase to be increased in the blind channel from its inlet to the end. Such a device may find application to measurement of pressure of a biphasic fluid in a heat exchanger or in a fuel cell.

Device forming a manometer intended for measuring biphasic fluid pressure, associated method of manufacture and fluidic network

The invention relates to the use of a super-slippery thin-layer film or coating for enhancing the lubrication capacity of a part to be subjected to great friction and wear. The film of the invention for improving the lubrication capacity of parts to be subjected to important friction and wear includes at least: a layer () of a hard material selected from titanium nitride (TiN), chromium nitride (CrN), titanium carbide (TiC), chromium carbide (CrC), tungsten carbide (WC) and tungsten carbide-carbon composites (WC/C), alumina (AIO), molybdenum sulphide (MoS), and materials of the hydrogenated amorphous carbon type (a: CH), the layer including on one surface thereof a series of dips and protrusions; and a layer () of an oleophilic material. The invention can particularly be used in the field of mechanics.

Method for using a super-slippery thin layer characterized by the method for making same

A mould for objects made of polymer material is produced by successively depositing a barrier thin layer and a thin layer of diamond-like carbon on at least a part of a metal support. The thin layer of diamond-like carbon is then nanopatterned with a predetermined pattern presenting a form factor of more than 1. Nanopatterning is performed by selective chemical etching in dry phase through a hard mask and etching stops at an interface between the thin layer of diamond-like carbon and the barrier thin layer. The hard mask used was formed beforehand on a free surface of the thin layer of diamond-like carbon by selective chemical etching in dry phase performed through a void lattice delineated by nanoparticles deposited beforehand on a free surface of said hard mask. The barrier thin layer and the nanopatterned thin layer of diamond-like carbon form a bilayer coating presenting a thickness comprised between about 100 nm and about 10 &#x3bc;m.

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Saint Egreve, France

Jerome Gavillet