Enel Green Power, S.p.a.

Poltrona Frau S.p.a.

Max Mara S.r.l.

Ingegneria Siderurgica S.r.l.

Renzo Piano Building Workshop S.r.l.

Renzo Piano

Luigi La Pegna

Giovanni Arvedi

Giovanni Gosio

It is described a blade for a wind turbine for converting wind energy into electric energy, including: a blade structure longitudinally extending along a blade axis (X) and including a blade tip, an opposite blade root, a longitudinal leading edge portion and a longitudinal trailing edge portion which are extended between the blade root and the blade tip; and an outer aerodynamic shell defining an airfoil including an airfoil leading edge, an airfoil trailing edge and an airfoil suction side and an airfoil pressure side between the airfoil leading and trailing edges. The outer aerodynamic shell includes a suction side panel and a pressure side panel which are made from a transparent material and are fastened to the blade structure so as to define the airfoil suction side and the airfoil pressure side, respectively, wherein the blade includes a transparent region between the transparent panels and wherein the transparent panels are arranged facing one another so that it is possible to see through the blade looking through the transparent panels and the transparent region. A method for assembling the blade is also described.

Blade for wind turbine and method of assembly of the blade

A wind turbine for converting wind energy into electric energy using a primary and secondary pivotable wind rotor. The rotors of the wind turbine have a horizontal and a vertical axis. The secondary rotor rotates independently from the wind, enabling a continuous production of electric energy, which is advantageous in that the turbine overcomes drawbacks in intermittent wind speeds.

Horizontal axis wind turbine and secondary wind rotor

Wind turbine generator part

Chair for theatres, auditoriums or the like

A three-dimensional reticulated structure or space lattice structure is formed of metal rods tapered at their ends so that the loss of cross-section leads to a thickening of the tubular wall of the rod, whereby it can be threaded at its ends by removal of material without losing mechanical strength. This is preferably attained by coining through at least six successive passes in dies of increasingly smaller dimensions. The knots or junctions are bored metal cups, said rods converging into the bores thereof and being fixed simply by bolts. A plug of concrete reinforced with steel fibres closes the base of the cup while allowing its reopening for inspection and maintenance, and provides further mechanical strength to the assembly.

Three-dimensional reticulated structure with rods having tapered ends

Growing community of inventors

Genoa, Italy

Renzo Piano