Abstract: Device for the storing and reuse of energy comprising at least one support structure (2), at least one first flywheel (3; 103) rotatably constrained to the support structure (2) and at least partially enclosed in its inside, at least one first motor (5) and also comprising at least one processing and control logic unit (9) configured to control at least the operation of the first motor (5). This device also comprises at least a second flywheel (4; 104) rotatably constrained to the support structure (2) and at least partially enclosed in its inside and at least one second motor (6) operatively connected to the second flywheel (4; 104). Furthermore, the processing and control logic unit (9) is operatively connected to the second motor (6) to control its operation independently with respect to the control of the first motor (5).

Abstract: The present invention regards a fin for a finned pack for heat exchangers, including a plate in which a plurality of through holes is formed for the positioning of tubes intended to convey a first heat exchange fluid, the plate having an edge as well as two main faces, each intended to be licked by a second heat exchange fluid in a crossing direction (A-A) from an inlet portion to an outlet portion of the edge of the plate.

Abstract: The present invention is an element (1) for making a surface extraction replica (50) of a metallic material to be analysed (C), comprising a layer (2) suited to be placed in contact with a surface area (20) of the material to be analysed (C) so as to memorize the characteristics of the material to be analysed (C); the layer (2) comprises indium (In) or indium oxide (In203). The invention includes also a kit comprising a casing and an element for making a surface extraction replica, a method for making a surface extraction replica (50) of a metallic material to be analysed (C) and the use of indium (In) or indium oxide (In203) in a method for making a surface extraction replica (50) of a metallic material to be analysed (C).