Abstract: The double-regulated turbine comprises a spherical hub, adapted to rotate around a first rotation axis, and blades, which are each able to be swivelled relative to the hub around a second rotation axis, transversal to the first rotation axis, by respective coupling flanges that are mounted fixedly on the spherical hub and that include each an attachment surface for a corresponding blade. The attachment surface of the coupling flanges includes a flat portion.

Abstract: A turbine unit for a hydraulic installation, and more in particular it deals with the hub of the turbine unit. The present invention proposes to provide means for adjusting a gap extent formed between the hub and the inner edge of the blade, this way dramatically increasing the performance of the turbine.

Abstract: A turbine unit for a hydraulic installation, and more in particular it deals with the hub of the turbine unit. The present invention proposes to provide means for adjusting a gap extent formed between the hub and the inner edge of the blade, this way dramatically increasing the performance of the turbine.

Abstract: A hydro turbine with a runner unit allows adjusting the gap clearance downstream and between the runner end tip portion and the inner edge of the blades. This gap clearance may depend on the angular position of the runner blades.

Abstract: The double-regulated turbine comprises a spherical hub, adapted to rotate around a first rotation axis, and blades, which are each able to be swivelled relative to the hub around a second rotation axis, transversal to the first rotation axis, by respective coupling flanges that are mounted fixedly on the spherical hub and that include each an attachment surface for a corresponding blade. The attachment surface of the coupling flanges includes a flat portion.

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 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.

Abstract: 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.

Abstract: A heat exchange device with convective and confined boiling includes a channel in a substrate in contact with an element to be cooled, in which a polar fluid flows from upstream to downstream, a mechanism of movement of the fluid by convection in the channel imposing a direction of flow, and a device for movement by electro-wetting positioned between the channel and the element to be cooled to move the fluid in the channel. The channel includes an inner surface having low wettability with regard to the polar fluid. The mechanism of movement by electro-wetting includes electrodes and a controller to apply selectively a potential to the electrodes such that an electrostatic force gradient is applied to the fluid in the direction of flow.

Abstract: A method for heat exchange by boiling a polar liquid on a surface including at least one low-wetting zone, including: a) generating appearance of nuclei of vapor bubbles on the low-wetting zone, and causing the nuclei to grow; and b) making the surface wetting by at least one electro-wetting system, to favor detachment of the gas bubbles formed in this manner.

Abstract: A heat exchange device including a first surface configured to be in contact with a source of heat to be discharged and a second surface configured to be in contact with a coolant. The device includes a plurality of recesses fluidically insulated from one another, each recess leading onto the second surface via at least one channel, each channel having a length and a transverse size that prevents the coolant from entering the recess. The second surface has better wettability properties with respect to the coolant and the inner surfaces of the channels and the recesses have wettability properties less than or equal to those of the second surface.

Abstract: A device intended to accomplish the deposition of particles of nanometric size on at least one part of the surface (4) of a substrate (2), including a first enclosure (14) intended to contain a liquid (8) charged with particles (6) of nanometric size, in which the first enclosure (14) is subject to a pressure higher than atmospheric pressure, and including means of heating (16) the said fluid able to raise the fluid to its boiling temperature, a second enclosure (20) pressurised at a pressure roughly equal to that of the first enclosure (14), inside which the deposition by boiling occurs, in which means of heating (24) are provided to heat at least a part of the surface (4) of the substrate (2), and in which the first enclosure (14) is connected to the second enclosure (20) to allow the second enclosure (20) to be supplied with the fluid raised roughly to its boiling temperature.

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.