Abstract: A heat pipe includes an extruded profile body, with a hollow body closed at the ends, filled with a predefined volume of diphasic working fluid. A plurality of longitudinal channels are included, with each having a section delimited by a bottom formed by one tubular peripheral wall of the profiled body, and laterally by two longitudinal dividers. A circumferential transfer channel, which is arranged transversely to the local axial direction and provides mutual fluid connection between the longitudinal channels, is provided at a position along the longitudinal path and or at an end, where the longitudinal dividers are interrupted, partially or completely, in the area of the circumferential channel, with optional use of a closure ring.

Abstract: A capillary evaporator for a heat transfer system includes a member for picking up heat energy comprising a base (10) and a plurality of projections, each of which extends from the base to a peak (12) and the size of which decreases with increasing distance from the base, and a primary wick (2) made of a porous first material with a front face adjacent to the peak of the projections. The flanks of the projections delimit, with the primary wick, empty spaces that form steam ducts. The flanks of the projections are covered with a thin layer (3) of porous material with the thickest part disposed in contact with the primary wick in the vicinity of the peak of each projection, and the thickness of the thin layer decreases with increasing distance from the primary wick.

Abstract: A capillary evaporator for a heat transfer system includes a member for picking up heat energy comprising a base (10) and a plurality of projections, each of which extends from the base to a peak (12) and the size of which decreases with increasing distance from the base, and a primary wick (2) made of a porous first material with a front face adjacent to the peak of the projections. The flanks of the projections delimit, with the primary wick, empty spaces that form steam ducts. The flanks of the projections are covered with a thin layer (3) of porous material with the thickest part disposed in contact with the primary wick in the vicinity of the peak of each projection, and the thickness of the thin layer decreases with increasing distance from the primary wick.

Abstract: A capillary evaporator for a heat transfer system includes a member for picking up heat energy comprising a base (10) and a plurality of projections, each of which extends from the base to a peak (12) and the size of which decreases with increasing distance from the base, and a primary wick (2) made of a porous first material with a front face adjacent to the peak of the projections. The flanks of the projections delimit, with the primary wick, empty spaces that form steam ducts. The flanks of the projections are covered with a thin layer (3) of porous material with the thickest part disposed in contact with the primary wick in the vicinity of the peak of each projection, and the thickness of the thin layer decreases with increasing distance from the primary wick.

Abstract: A flat heat pipe with a two-phase liquid-vapor working fluid, includes a first plate receiving thermal energy from a heat source, a second plate transferring thermal energy to a cold source, an edge to form a hermetically sealed enclosed internal space, a capillary structure interposed between the first and second plates, vaporization channels adjacent to the first plate, condensation channels adjacent to the second plate, a transfer passage placing the evaporation channels in communication with the condensation channels for the transport of vapor, and a collection channel forming a reservoir, in fluid communication with each condensation channel. The collection channel is adjacent to the second plate, such that the collection channel can pump and store the excess liquid phase.

Abstract: A flat heat pipe with a two-phase liquid-vapor working fluid, includes a first plate receiving thermal energy from a heat source, a second plate transferring thermal energy to a cold source, an edge to form a hermetically sealed enclosed internal space, a capillary structure interposed between the first and second plates, vaporization channels adjacent to the first plate, condensation channels adjacent to the second plate, a transfer passage placing the evaporation channels in communication with the condensation channels for the transport of vapor, and a collection channel forming a reservoir, in fluid communication with each condensation channel. The collection channel is adjacent to the second plate, such that the collection channel can pump and store the excess liquid phase.

Abstract: A capillary pumped heat transfer loop involved an evaporator, a condenser and a reservoir tank for storing a heat transfer fluid, the evaporator being provided with a porous material for generating capillary pumping pressure within the loop; the tank and the evaporator are mutually thermally insulated and interconnected via a channel that has as a first portion a capillary connection for pumping the heat transfer fluid from the tank to the porous material, and has a second portion for conveying gas bubbles and/or steam from the evaporator to the tank, the tank being arranged to be kept at a lower temperature than the evaporator.

Abstract: A device for applying a liquid product, in particular paint, includes an applicator with at least one roller, a supply unit with a variable speed, volumetric pump, and a duct connecting the pump to the applicator. The pump is connected to a control unit. A detector detects a speed of the roller and provides a control signal corresponding to the speed to the control unit. The control unit includes a regulator for setting a linear relationship between the speed of the pump and the speed of the roller. The control unit controls the liquid product flow rate supplied by the pump based upon the control signal and the linear relationship set by the regulator.