A frustum connector for connecting wind turbine tower portions is provided, which frustum connector includes a plurality of individual steel segments, wherein each segment includes two side edges, an upper edge and a lower edge, wherein the length of the lower edge of a segment exceeds the length of the upper edge of that segment; and wherein the vertical side edges of adjacent segments are adapted for connection at a wind turbine installation site. A wind turbine tower and a method of constructing a wind turbine tower is also provided.

The invention relates to an elastic rotary bearing for two-blade rotors that are used in wind turbines for high load cycles. The invention relates in particular to a new type of rotor hub for, in particular, elastically mounted two-blade rotors of wind turbines into which an elastic rotary bearing is integrated, which in turn is composed of two rotational joint units composed of layer elements and cone elements.

The application relates to unidirectional hydrokinetic turbines having an improved flow acceleration system that uses asymmetrical hydrofoil shapes on some or all of the key components of the turbine. These components that may be hydrofoil shaped include, e.g., the rotor blades (34), the center hub (36), the rotor blade shroud (38), the accelerator shroud (20), annular diffuser(s) (40), the wildlife and debris excluder (10, 18) and the tail rudder (60). The fabrication method designs various components to cooperate in optimizing the extraction of energy, while other components reduce or eliminate turbulence that could negatively affect other component(s).

A venting apparatus for generating electricity, the apparatus comprising a head and a base, whereby rotation of the head relative to the base generates electricity, wherein the head includes: a receptacle in which is disposed a solar cell, and a plurality of blades disposed around a periphery of the head for rotating the head in response to airflow around and/or over the head.

An oscillating water column (OWC) includes a top body and a bottom body. The top body includes a hollow shape, an open top end, an open bottom end, a chamber traversing between the open top and bottom ends, a power take-off system proximate to the open top end, and an air channel proximate to the open top end and the power take-off system. The bottom body includes a bottom heave plate and a plurality of flexible tethers coupling the top body and the bottom body.

A fluidic structure configured to be mounted onto the hub of a fluidic turbine comprising a hub that rotates about a center axis, aligned to a main shaft that contributes torque to the main shaft of the turbine via the principle of lift and/or drag. The fluidic structure is mounted onto the hub of a primary turbine that contributes torque to the main shaft through increasing at least one of lift and drag, and the fluidic structure includes two or more curved fluidic elements that extend from an upstream tip that aligns to the center axis of rotation, to a downstream end at a radial position away from the center axis, and rotates about the center axis to contribute torque to the primary turbine; and a sensor positioned at or proximate to an upstream tip of the fluidic structure for determining environmental and turbine conditions and transmits information to a supervisory control and data acquisition system of the primary turbine.