To provide a wind power generation device that can be suitably increased in size while increasing the electricity generation efficiency. A wind power generation device (10) is characterized by being provided with: a first wind turbine unit (12) comprising multiple wind turbines (30a to 30d) aligned in one line; a pair of blade units (16), each of the blade units being disposed adjacent to the first wind turbine unit (12) and having an inner-side shape extending along the circumferences of circles defined by rotation of the wind turbines (30a to 30d) to enhance collection of wind by the rotation; and a conversion unit for converting energy obtained by the rotation of the first wind turbine unit (12) to electricity.

A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

The present invention relates to a leading edge protection for a wind turbine blade, wherein a leading edge axis of the leading edge protection is configured to be fitted on at least part of a leading edge of a wind turbine blade and the leading edge protection is configured to extend between the leading edge and a first edge downstream a first side of the wind turbine blade as well as between the leading edge and a second edge downstream a second side of the wind turbine blade, wherein the leading edge protection comprises a first part and wherein the first edge is configured to be non-parallel with the leading edge of the wind turbine blade along the first part of the leading edge protection. The present invention further relates to a wind turbine blade comprising the leading edge protection and a wind turbine comprising the wind turbine blade. Finally, the present invention relates to a method for protecting a leading edge of a wind turbine blade arranged on a wind turbine and a leading edge protection obtainable by that method.

The present disclosure is directed to tip extensions for wind turbine rotor blades and methods of installing same. The method includes removing a removable blade tip of a lightning protection system from the rotor blade so as to expose a down conductor of the lightning protection system. The method also includes securing a conductive extension to the down conductor. Moreover, the method includes sliding the first end of the tip extension over the conductive extension so as to overlap the rotor blade at the tip end. In addition, the method includes securing the removable blade tip to the conductive extension at the second end of the tip extension. Further, the method includes securing the tip extension to the rotor blade.

The present invention relates to a wind turbine blade (10) comprising two or more serrations (100a, 100b, 100c) provided along a section (S) of the trailing edge (20). The section (S) extends spanwise from the tip end (14) towards the root end (16) for up to 5% of the total blade length (L), The serration (100a) closest to the tip end has a height (H) and/or width (W) greater than the respective height (H) and/or width (W) of at least one other serration (100b, 100c) in said section. The present invention also relates to a wind turbine (2) comprising at least one wind turbine blade (10) of the present invention and to a serrated panel (66).

Provided is a trailing edge assembly of a wind turbine rotor blade, which includes a mounting portion; a flap portion flexibly connected to the mounting portion so that a flap angle subtended between the mounting portion and the flap portion can be altered; a volume adjustable chamber arranged between the mounting portion and the flap portion and realised to alter its volume between a minimum volume associated with a minimum flap angle and a maximum volume associated with a maximum flap angle; and at least one tube to face into an airflow passing over the airfoil region of the rotor blade, and an inner orifice arranged to face into the interior of the volume adjustable chamber such that an airflow between the outer orifice and the inner orifice alters the volume of the volume adjustable chamber. Embodiments of the invention further describe a wind turbine rotor blade.

A rotor blade for a wind turbine, wherein the rotor blade includes serrations along at least a portion of the trailing edge section of the rotor blade is provided. The serrations include a first tooth and at least a second tooth, wherein the first tooth is spaced apart from the second tooth. Furthermore, the area between the first tooth and the second tooth is at least partially filled with a plurality of comb elements, wherein the comb elements are arranged substantially parallel to each other and in substantially chordwise direction of the rotor blade such that generation of noise in the trailing edge section of the rotor blade is reduced. The rotor blade is further characterized in that it includes a plurality of ridges including a first ridge and at least a second ridge for manipulating an airflow which is flowing along the ridges.

The present invention relates to a leading edge protection for a wind turbine blade, wherein a leading edge axis of the leading edge protection is configured to be fitted on at least part of a leading edge of a wind turbine blade and the leading edge protection is configured to extend between the leading edge and a first edge downstream a first side of the wind turbine blade as well as between the leading edge and a second edge downstream a second side of the wind turbine blade, wherein the leading edge protection comprises a first part and wherein the first edge is configured to be non-parallel with the leading edge of the wind turbine blade along the first part of the leading edge protection. The present invention further relates to a wind turbine blade comprising the leading edge protection and a wind turbine comprising the wind turbine blade. Finally, the present invention relates to a method for protecting a leading edge of a wind turbine blade arranged on a wind turbine and a leading edge protection obtainable by that method.

A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

A rotor blade uses hot-air, for example exhaust from a generator positioned inside a nacelle of a wind turbine, for de-icing and/or anti-icing. The rotor blade has an airfoil section and a cavity enclosed therein. A flow path inside the cavity, for flow of the hot-air, extends from a root section towards a tip section. Exhaust holes, fluidly connected with the flow path, at an outer surface of the airfoil section emit the hot-air from the airfoil section. The rotor blade includes a cover plate positioned at the outer surface of the airfoil section and masking the exhaust holes, thereby creating an external flow space between the exhaust holes and the cover plate's inner surface. The cover plate guides the hot-air over the outer surface of the airfoil section after the hot-air exits, via the exhaust holes, the airfoil section and before the hot-air escapes the rotor blade.