| 摘要 |
An for a Wind Energy Converting System (WECS in the following) for producing electric power, comprising the said de-icing and anti-icing arrangement and a method for preventing and eliminating the ice accretion on the blades of the rotor of an WECS are the subject matter of the present invention. Such an WE CS (l; l'; 1"; 1"') is of the type comprising: - a tower (4; 4'), apt to suppor t and anchor the said WECS (1; l'; 1"; 1"') to the ground or a basement, - a [nacelle](3), located on said tower (4; 4'), to which there are associated first means (9, 1N, 10; TR) for transforming the rotating movement of a roto r in order to generate electric power to be introduced into an electric [electric grid] and for the management and the operation of possible electri c of said WECS (1), - a rotor (2), associated to said [nacelle](3) in the mann er that it can be rotate with respect to said [nacelle](3), said rotor (2) comprising a number of blades (5) and susceptible of rotating because of the wind (V) which hits said blades (5), wherein said WECS (1; l'; 1"; 1"') internally comprises second means (2E, 19, 21) for the 15 flow of a fluid (F ; F; F"; F"') inside volumes (14, 15) defined in the interior of said blades ( 5) of said rotor (2). The present invention is characterized in that the blades (5) of therotor comprise, on at least a part of an external surface (5S), openings (12) which are in connection with the fluid of said volumes (14, 15 ) inside said blades (5) and are apt to realize an ejection of at least a part of said fluid (F; F; F"; F"') outside said blades (5), in order to fluid- thermodynamically interact with said wind (V) hitting at least said part of the surface (5S) concerned by said openings (12), and/or with water and ice possibly present on said external surface (5S) of said blade (5). |
