The present invention relates to a waterpower stream amplifier device primarily comprised of a body with an outer surface further comprised of at least one exterior protrusion and an interior surface further comprised of at least one angular flow director. The device can be placed/combined with the rotor of an underwater hydroelectric turbine in order to concentrate and multiple the energy of the water stream entering the turbine. The at least one angular flower director of the interior surface, the at least one exterior protrusions and at least one longitudinal opening of the outer surface allows water to enter the interior surface of the body from all directions. As a result, a rotating water vortex is created within the interior surface as the water travels from the first end towards the second end.

A multistage wind turbine or network of wind turbines with improved and optimized wind-directing, wind-shaping, and wind-power conversion features indicates that the shapes of these features directly affect the ability of the multistage wind turbine to use the power of moving air, such as wind, to spin a rotor and create torque on a rotor shaft to generate electricity. The wind-power-conversion mechanical efficiency described significantly improves upon previous designs by conversion of wind energy into electrical power at a superior price-to-performance ratio compared with existing alternative energy technologies.

A nonlinear control design technique capitalizes on a wave energy converter comprising a shaped buoy having a variable geometry wave energy. For example, the shaped buoy can have an hourglass (HG) geometry having a variable cone or steepness angle. The HG buoy is assumed to operate in the heave motion of the wave. The unique interaction between the HG buoy and the wave creates a nonlinear cubic storage effect that produces actual energy storage or reactive power during operation. A multi-frequency Bretschneider spectrum wave excitation input was simulated for the HG design both with constant and varying steepness angle profiles which demonstrated further increased power generation with changing sea states for the variable design.

A torque bracket arrangement for a wind power gearbox for transmitting a supporting force to a support structure of a wind power plant includes at least one radial support arm having an associated opening configured to receive a horizontal support pin. The at least one radial support arm is provided on a gearbox side and is configured to establish a detachable connection to at least one corresponding opening of a support eyelet unit arranged on the support structure. The at least one corresponding opening of the support eyelet unit includes an elastomer bearing bush into which the horizontal support pin is configured to be inserted. The elastomer bearing bush has differing rigidities depending on the load. The elastomer bearing bush consists of at least one soft region of low rigidity and at least one comparatively harder region of greater rigidity.

A wind turbine main shaft assembly is provided. The wind turbine main shaft assembly includes a wind turbine main shaft and a connecting piece attached to an end of the wind turbine main shaft. The wind turbine main shaft assembly further includes a first frictional connection between an axial end face at the end of the wind turbine main shaft and an axial face of the connecting piece and a second frictional connection provided by an interference fit between a circumferential portion at the end of the wind turbine main shaft and a corresponding circumferential portion of the connecting piece.

A nonlinear control design technique capitalizes on a wave energy converter comprising a shaped buoy having a variable geometry wave energy. For example, the shaped buoy can have an hourglass (HG) geometry having a variable cone or steepness angle. The HG buoy is assumed to operate in the heave motion of the wave. The unique interaction between the HG buoy and the wave creates a nonlinear cubic storage effect that produces actual energy storage or reactive power during operation. A multi-frequency Bretschneider spectrum wave excitation input was simulated for the HG design both with constant and varying steepness angle profiles which demonstrated further increased power generation with changing sea states for the variable design.

This invention relates to a voluminous wind/wave turbine system, the turbine system has two wind/wave subsystems and is based on a unique volume process and optimized blades defining two power zones to harness wind and wave energy together or separately beyond the Betz limit, the vortical wind turbine subsystem has a pair of a front and back vortical blades to generate more power with satellite generators, the wave subsystem is a breakthrough for commercial applications and has a robust float vessel with toroid or polygonal pipes structure and multiple hinge mechanisms to hold multiple wave turbines against violent wave, the wave turbine has only a conversion to produce electricity constantly 24/7 with 360 degree freedom, the both subsystems are based on a shaft-less twin rotor turbomachinery and represent a new era of reliable and renewable energy at an unprecedented level of efficiency and the reliability.

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 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.

A rotor including soft rotor structures fixed to the rotor shaft, which rotor structures are of a soft material such as canvas or the like. The rotor structure is a loop arranged to form an asymmetrical cone when an air or water current flows through the loop.