Abstract: Integrated wind-photovoltaic system for the production of electrical energy, the system comprising a wind generator equipped with a semi-vertical axis provided, in turn, with wind blades having a back, wherein the back of the aerodynamic profile of these wind blades is at least partially provided with a covering consisting of flexible photovoltaic panels, and wherein a sunlight concentration optical system is provided comprising a plurality of coplanar lenses.

Abstract: Integrated wind-photovoltaic system for the production of electrical energy, the system comprising a wind generator equipped with a semi-vertical axis provided, in turn, with wind blades having a back, wherein the back of the aerodynamic profile of these wind blades is at least partially provided with a covering consisting of flexible photovoltaic panels, and wherein a sunlight concentration optical system is provided comprising a plurality of coplanar lenses.

Abstract: Transmission system with three coaxial concentric shafts for wind driven rotors with vertical axis, characterized by very high compactness and rigidity; it comprises a first outer, blade-carrying, shaft (3) which transmits the rotary motion to the third inner shaft (5) connected to an electric generator which is also coaxial; a second shaft (4) interposed between the two outer (3) and inner (5) rotary shafts and fixed integral with the supporting frame (8) of the eolic machine. The system has a low rolling friction by virtue of the action of counter springs counteracting the weight of the wind driven rotor.

Abstract: Self-starting vertical axis wind rotor (11) able to start also at very low wind speeds, for example of the order of 1 m/s, comprising a fixed support structure; a machine for converting the circular movement into electric current, associated with the structure; a vertical shaft rotatably supported by the structure and connected to the machine so that the rotation of the shaft causes the generation of electric current by the machine; a rotatable wind structure connected centrally to the vertical shaft and at the periphery to a plurality of rotor blades; wherein each rotor blade of the plurality of blades comprises three elongated bodies arranged in cascade and having the same wing profile, the elongated bodies being arranged vertical and substantially parallel to each other and to the shaft.

Abstract: The invention concerns a composite additive for diesel fuel for engine driven vehicles containing Dimethylcarbonate, ethylic aldehyde and ethyl nitrate mixed together. The composite additive is added to the diesel fuel in an effective quantity from 4 to 5 v/v % to improve the combustion of said diesel fuel in endothermic Diesel cycle engines.