A test apparatus for torsional testing of a wind turbine blade is provided. The apparatus includes a test stand for rigidly supporting the wind turbine blade; a load frame for mounting on the wind turbine blade at a testing position along the length of the blade; and an actuator connected to the load frame for twisting the blade via the load frame. The load frame includes an outer frame to which the actuator is connected and a profiled insert held within the outer frame and defining a profiled aperture corresponding to the profile of the blade at the testing position. The profiled insert encloses and is in direct contact with the outer surface of the blade over substantially the entire profile of the blade. A system and method of torsional testing of a wind turbine blade and a load frame for the test apparatus are also provided.

A method to design the kits and layup the reinforcement layers and core using projection system, comprising a mold having a contoured surface; a layup projection generator which: defines a plurality of mold sections; identifies the dimensions and location for a plurality of layup segments. A model-based calibration method for alignment of laser projection system is provided in which mold features are drawn digitally, incorporated into the plug(s) which form the wind turbine blade mold, and transferred into the mold. The mold also includes reflective targets which are keyed to the molded geometry wherein their position is calculated from the 3D model. This method ensures the precision level required from projection system to effectively assist with fabrication of wind turbine blades. In this method, digital location of reflectors is utilized to compensate for the mold deformations.

Wind turbine according to the invention has at least one movable guide consisting of two rectangular wings (14) and (15) set in one plane and fixed with one edge to mounted shaft (11) set parallel to the axis of the turbine (2) and in such way that the edge of the first wing (14) is tangential, with small space, to the edge of the bar (10) which is an extension of the guide vane (4) of the body (3) and is set in the same plane as guide vane (4), where the edge of the first wing (14) rests on resilient members (16) fixed to the bar (10), and spread of the second wing (15) is smaller than the spread of the first wing (14) and the shaft (11) is connected to drive mechanism (13) equipped with positional switch, where the drive mechanism (13) is connected to control system.

An equivalent variable pitch differential control method and apparatus. The method includes: acquire a first control parameter and a second control parameter respectively by means of a static energy deviation PI control method; acquire an equivalent differential third control parameter using a dynamic energy deviation; and by taking a wind wheel measurement rotating speed and a wind wheel reference rotating speed as inputs, a proportion integration differentiation controller controls a wind generating set according to the first control parameter, the second control parameter, and the third control parameter, thereby making a wind wheel rotating speed follow the wind wheel reference rotating speed. A wind generating set is controlled in real time by combining first and second control parameters and an equivalent differential third control parameter to serve as parameter values of the proportion integration differentiation controller.

A method for mounting rotor blades of a wind turbine is provided. The wind turbine has a rotor hub with three rotor blade ports. A rotor blade is to be mounted to each of the three rotor blade ports. A mounting arm is fastened to a first rotor blade port. The mounting arm has a first section and a second section, which are coupled with each other via a hinge, so that the angle between the first and second sections can be varied. The hub is turned until the first rotor blade port is in a 90° position. A first end of the first section of the mounting arm is fastened to the first rotor blade port of the rotor hub. The rotor hub is turned with the help of the mounting arm, until the second rotor blade port is in a 270° position. The angle between the first and second sections of the mounting arm is varied while turning the rotor hub. A first rotor blade is lifted, so that the first rotor blade is horizontally mounted to the second rotor blade port of the rotor hub.

A structure adapted to traverse a fluid environment exerting an ambient fluid pressure is provided. The structure includes an elongate body extending from a root to a wingtip and encapsulating at least one interior volume containing an interior fluid exerting an interior fluid pressure that is different from the ambient fluid pressure. A method of retrofitting a structure adapted to traverse a fluid environment exerting an ambient fluid pressure, the structure comprising an elongate body extending from a root to a wingtip and having at least one interior volume is also provided. The method includes sealing the elongate body to encapsulate the at least one interior volume containing an interior fluid; associating at least one valve with the at least one interior volume; and modifying interior fluid content via the at least one valve to produce an interior fluid pressure that is different from the ambient fluid pressure.

The disclosure relates to a mounting frame, an energy storage unit, a pitch system, a wind turbine and a method. The mounting frame for mounting accumulators in a hub includes: a base having a predetermined thickness, wherein the base includes a mounting surface in a thickness direction of the base; and two or more accumulator mounting elements disposed on the mounting surface at intervals, wherein each accumulator mounting element includes a supporting assembly and a holding assembly connected to the supporting assembly, the supporting assembly is connected to the mounting surface and extends in the thickness direction, and the holding assembly is adapted to clamp and fix the accumulator such that all the accumulators in the hub are mounted to the mounting frame.

A multi-stage wind power extractor includes a tunnel and at least two turbines. The tunnel is circular in a cross-section and has a horizontal axis, first and second open ends, and a length that is greater than a diameter of the tunnel. The tunnel diameter progressively increases from the first open end to the second open end. The turbines are arranged in spaced relation within and coaxial with the tunnel. Each includes a rotor having a plurality of radially extending blades, a controller connected with the rotor, and a motor connected with the controller. The controllers independently engage and disengage their respective rotors in accordance with a wind velocity travelling through the tunnel from the first open end to the second. In turn, when a rotor is engaged, the motor provides power to a generator that is connected therewith.

A rotor wind turbine blades with attached mantle peridotite panel available to capture CO.sub.2 in air while the blades are rotating powers by the wind. Due to presence of Ca.sup.+ and Mg.sup.+ in the mantle peridotite glass cell, the panel composed of glass cells can conduct sequestration of carbon dioxide in air and the product of CO.sub.2 sequestration is mineralized carbon. Another means of CO.sub.2 sequestration in air is by placing the mantle peridotite panel at the top of the wing structure of plane and capture the CO.sub.2 while the plane is flying.

A rotor blade for a wind turbine, to a rotor for a wind turbine, to a wind turbine, to a method for producing a rotor blade, to a method for connecting a rotor blade to a rotor hub and to a method for repairing a rotor of a wind turbine. The rotor blade has a connection interface, the connection interface having at least one cutout for receiving a tension element for connecting the rotor blade to a further element of a wind turbine, an outer circumferential surface of the cutout being formed of a connection material and having an internal thread.