A frame which includes adjacent, spaced-apart segments that define adjacent, spaced-apart, and parallel closed-loop tracks supporting two or more articulated foils between the adjacent frame segments. Opposite distal ends of the foils cooperate with opposite tracks of the frame segments so that the foils can traverse along the tracks when current lifts the foils and pushes them along the tracks.

The invention relates to a rotor blade of a wind power plant having two rotor blade half-shells (1, 21) with in each case a leading-edge periphery and a trailing-edge periphery (8a, 22a), which rotor blade half-shells are adhesively fastened to each other along the leading-edge and trailing-edge peripheries (8a, 22) and which in case have a trailing-edge girder (3, 25), and each of the trailing-edge girders (3, 25) at least in certain sections is of rectangular design in a cross section along its longitudinal extent.

Traction air device with multiple wing contours for a wind power generation plant and wind power generation plant utilizing the air device.

A tidal current energy generating device includes an outer frame (1), at least one inner frame (2), at least two hydro turbines (3), at least one center shaft (4), at least one generator (5), and at least three bearings (6). The at least one inner frame (2) is separably disposed in the outer frame (1). At least two hydro turbines (3) are located below a water surface and are disposed in one inner frame (2). At least two hydro turbines (3) are disposed coaxially and are vertical-axis hydro turbines. At least one center shaft (4) is disposed through the at least two hydro turbines (3), the axis direction of the center shaft is perpendicular to the horizontal plane, and the center shaft (4) rotates along with the rotating of the hydro turbines (3). The at least one generator (5) is located above the water surface and connected with one end of the center shaft (4). The at least three bearings are sleeved on the center shaft (4) and are located on two sides of and between the two hydro turbines (3), respectively. The tidal current energy generating device can be modularly assembled and replaced above the water surface and can extend along the water depth direction, thereby improving the power generating efficiency.

An airfoil for a wind turbine apparatus includes an airfoil body having an arcuate shape extending between a first end and a second end and an airfoil support secured to a midpoint on the airfoil body and connected to the outer end of the support arm. The airfoil body includes a first portion adjacent to the first end and a second portion adjacent to the second end. The first end and the second end are secured to the support arm, and the body of the airfoil is comprised of material capable of flexing in response to wind pressure. The first and second portions of the airfoil body extend away from each other in an extended position and collapse together in a collapsed position, and the orientation of the airfoil relative to the direction of the wind causes the airfoil to move between the open and closed positions.

A wind driven electricity generator may have a tower with a set of stationary airfoils mounted thereon. Each airfoil may have a slot on a low pressure side of the airfoil. Air flow may through the slot relative to an inside of the airfoil. Air flowing through the airfoil may flow through the tower. The air flowing through the tower may turn a rotor (or propeller). The rotor may turn an electrical generator to generate electricity. Each airfoil may have a slot on a high pressure side. Air flowing through the slot on the high pressure side may turn the rotor.

A number of variations may include a method of optimizing inlet guide vane performance comprising: modifying an inlet guide vane to include at least one of a twist, a curve, a surface texture, a sealing feature, a tip leakage reduction feature, an airfoil having at least one component, or at least one channel.

A method for decommissioning a wind turbine blade includes separating a root section of a turbine blade from a tip section of a turbine blade, and laterally cutting the tip section of the turbine blade into a plurality of separate tip subsections. Each tip subsection is cut along its length, flattened, deposited into a compacting and bundling apparatus, and compressed. The compressed tip subsections are bundled in the compacting and bundling apparatus with banding material to form a bundle. The bundle is removed from the compacting and bunding apparatus and loaded onto a transportation vehicle. A compacting and bundling apparatus includes a base having four base members that form a rigid base structure, a plurality of vertical posts secured to the base structure, and two cross members from a first side of the base to an opposing second side of the base.

A wind turbine having one or more magnets for reducing friction between the turbine support and a turbine rotor. The reduction of friction between the turbine rotor and the turbine support allows for an increase in energy production and scale of the wind turbines. The magnet configuration employs a ring of cylindrically-shaped magnets at the bottom and opposed by a corresponding number of generally rectangular-shaped magnets. Bearing magnets are also employed for axial stabilization.

A method for decommissioning a wind turbine blade includes separating a root section of a turbine blade from a tip section of a turbine blade, and laterally cutting the tip section of the turbine blade into a plurality of separate tip subsections. Each tip subsection is cut along its length, flattened, deposited into a compacting and bundling apparatus, and compressed. The compressed tip subsections are bundled in the compacting and bundling apparatus with banding material to form a bundle. The bundle is removed from the compacting and bundling apparatus and loaded onto a transportation vehicle. A compacting and bundling apparatus includes a base having four base members that form a rigid base structure, a plurality of vertical posts secured to the base structure, and two cross members from a first side of the base to an opposing second side of the base.