Abstract: 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.

Abstract: A heat exchange structure, and an assembly as well as to a heat exchange device comprising such a structure, applying heat transfer by boiling of a liquid and comprising a substrate and at least one layer intended to be in contact with a liquid and at least partly positioned on the substrate. The composition of this layer comprises at least a molecular switch having a lower critical solubility temperature TLCST above which it gives the layer non-wetting properties towards the liquid and below which it gives the layer wetting properties towards the liquid, this lower critical solubility temperature TLCST of the molecular switch being selected so as to be greater than or equal to the saturation temperature Tsat of the liquid.

Abstract: The tank is of the type including a container (4) for housing hydrogen, and metallic hydride placed inside the container. According to one aspect of the invention, it includes at least one solid body (6) formed of a compacted material including metallic hydride and a matrix. Application in particular for tanks for internal combustion engines or for fuel cells, in particular for motor vehicles, as well as for any stationary or mobile application using hydrogen.

Abstract: The invention relates to a safe hydrogen-storing tank that is easy to manufacture and enables the quick kinetic absorption of hydrogen, which reduces the variations in volume and has a low cost in terms of material and energy. The invention has the aim of providing a tank for storing hydrogen, including a hydrogen inlet (21) and a hydrogen outlet (22) in fluid communication with at least one solid body (10-11) capable of the exothermal absorption and endothermal desorption of hydrogen, wherein said at least one solid body (10-11) is made of a compacted material containing light metal hydride and a heat-conducting matrix, and wherein said at least one solid body (10-11) is in heat-transfer relation with at least one heat recovery material (42) free from salt or molten-salt compounds and capable of absorbing the heat generated by the hydrogen absorption and of releasing said absorbed heat so as to provide heat for hydrogen desorption.

Abstract: The present invention relates to a tank for storing and withdrawing hydrogen by means of a reversible hydriding/dehydriding reaction, said tank consisting of a thermally insulated chamber that includes a plurality of elements (2) for storing hydrogen in the form of hydrides, each element having at least one surface for exchange with the gaseous hydrogen and at least one heat exchange surface, characterized in that it further comprises a plurality of heat storage elements (3) for preserving and releasing the heat that is associated with the reversible hydriding/dehydriding reaction.

Abstract: The invention relates to a safe hydrogen-storing tank that is easy to manufacture and enables the quick kinetic absorption of hydrogen, which reduces the variations in volume and has a low cost in terms of material and energy. The invention has the aim of providing a tank for storing hydrogen, including a hydrogen inlet (21) and a hydrogen outlet (22) in fluid communication with at least one solid body (10-11) capable of the exothermal absorption and endothermal desorption of hydrogen, wherein said at least one solid body (10-11) is made of a compacted material containing light metal hydride and a heat-conducting matrix, and wherein said at least one solid body (10-11) is in heat-transfer relation with at least one heat recovery material (42) free from salt or molten-salt compounds and capable of absorbing the heat generated by the hydrogen absorption and of releasing said absorbed heat so as to provide heat for hydrogen desorption.

Abstract: A heat exchange structure including a primary face including non-through holes formed in the face. The inner surface of the holes and the surface of the primary face outside the holes are covered with nanoparticles. The inside of the holes have a non-wettability property relative to a given liquid and the surface of the face between the holes have a wettability property relative to the liquid.

Abstract: The invention relates to a tank of the type that comprises a container (4) for housing hydrogen and metallic hydride placed inside the container. According to one part of the invention, the tank includes at least one solid body (6) made from a compacted material containing metallic hydride and a matrix. The invention is suitable, for example, for tanks for internal combustion engines or for fuel cells, in particular for motor vehicles, as well as for any stationary or mobile application involving hydrogen.

Abstract: The invention relates to a device which is used to produce hydrogen from a hydrocarbon, obtaining high energy efficiency and generating low levels of carbon dioxide and pollutants. The inventive device comprises (a) a conversion reactor which is used to convert the aforementioned hydrocarbons using water vapour. According to the invention, pure or almost pure oxygen is fed into the reactor in order to oxidize one part of the hydrocarbons and to provide the heat necessary to convert virtually all of the other part of the hydrocarbons into hydrogen, carbon monoxide and carbon dioxide. The device also comprises: (b) means of pre-heating the hydrocarbons, the oxygen flow and the water to be vaporized; (c) at least one heat exchanger which is used to cool the conversion product in order to recovery a fraction of the thermal energy of said conversion product; and (d) hydrogen-enrichment equipment.

Abstract: The electromagnetic machine (1) includes a tubular duct (3 ) intended to receive a conducting material which can circulate in the duct (3) around the core (4) and an inductor (2) arranged coaxially around the duct (3). The inductor (2) includes a magnetic circuit (15) formed by laminated sheet metal combs (18) and windings (14 ) arranged in annular notches (5 ) made in the magnetic circuit (15). The notches (5) are separated from each other by teeth. The teeth of the inductor have lengths in the axial direction which are smaller in the central part of the inductor (2) than in the end parts. The notches (5) are less deep at the ends than in the central part and enclose windings having a smaller number of turns. The windings (14) are each connected to one phase of a polyphase current source.