A hollow first housing with a rigid wall and a center of mass located on a portion of the rigid wall to which a weight is attached. When force is applied to tilt the apparatus then the center of mass is raised. When force is discharged, then a rocking motion of the hollow sphere device or housing will seek an equilibrium at the minimum gravitational potential energy. The rocking motion of the first housing activates a circular motion of a pendulum object. Motion of the pendulum object is passed to an electrical generator, which in turn produces electricity. The first housing may be a round circular hollow sphere, a circular cylinder, a cone, a frustrum, or may be configured in other shapes. A sail may be attached to an external surface of the first housing, at a location on the first housing furthest away from and opposite the weight.

A column with at least one photovoltaic element for converting radiation energy is disclosed. The at least one photovoltaic element converts radiation energy of light, such as sunlight, into electrical energy. The at least one photovoltaic element is arranged on the column, and at least one photovoltaic element is a flexible photovoltaic element.

A mounting pin assembly includes a first mounting component. The assembly also includes a second mounting component having a first leg located on a first side of the first mounting component and a second leg located on a second side of the first mounting component. The assembly further includes a mount pin extending through an aperture of the first leg, an aperture of the first mounting component, and an aperture of the second leg, the mount pin having a conical shoulder region in contact with a chamfer of the second leg. The assembly yet further includes a self-locking nut plate threaded to the mount pin.

Proposed are a fluid power generator which can enhance power generation efficiency by efficiently using the drag force of wind without increasing the size of blades, and a power generation system comprising the same. The fluid power generator includes: an ascending air current-forming body provided at a rotary shaft; a plurality of spiral blades which are spirally formed along the outer circumferential surface of the ascending air current-forming body; and a generator which generates electricity by rotation of the ascending air current-forming body.

Increased energy harvesting is realized using a nonlinear buoy geometry for reactive power generation. By exploiting the nonlinear dynamic coupling between the buoy geometry and the potential wideband frequency spectrum of incoming waves in the controller/buoy design, increased power can be captured in comparison to conventional wave energy converter designs. In particular, the reactive power and energy storage system requirements are inherently embedded in the nonlinear buoy geometry, therefore requiring only simple rate-feedback control.

A multistage wind turbine or network of wind turbines with improved and optimized wind-directing, wind-shaping, and wind-power conversion features is disclosed. The shapes of these features directly affect the ability of the multistage wind turbine to use the power of moving air, to spin a rotor and create torque on a rotor shaft to generate electrical, thermal and/or other forms of energy. 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.

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 novel universal propeller has a gearwheel arranged on each rotor blade that is directly operatively connected to a reference gearwheel of a timing gear. The timing gear is operatively connected to a hub gear. The hub gear senses and processes an angular velocity ω.sub.n of a rotation of the hub. The reference gearwheel and the gearwheels of the rotor blades of the timing gear are configured that the ratio of an angular velocity ω.sub.r of the reference gearwheel to the angular velocity ω.sub.n of the rotational movement of the hub is as follows: ω.sub.r/ω.sub.n=1±(½)*(S.sub.rot/S.sub.r), where S.sub.rot is a size of the gearwheels and S.sub.r is a size of the reference gearwheel. The present invention is particularly suitable for use in a wind power installation, hydropower installation or an engine of a ship or an aircraft.

A root bushing for a wind turbine rotor blade is provided, including a plurality of fiber material layers and an insert, wherein the insert is embedded in the fiber material layers, and wherein at least a part of the fiber material layers forms a double scarf joint for transferring loads from the insert to the fiber material layers and vice versa. Due to the double scarf joint it is possible to transfer high loads from the fiber material layers and vice versa. A less load resilient joint like double lap shear joint or the like can be omitted.

The present invention relates to a self-powered remote control system for a smart valve, the system comprising: a smart valve for regulating the flow of a fluid in a pipe; a sensing module for sensing the flow rate, pressure, and temperature of the fluid in the pipe; a power generation module for generating power according to the flow of the fluid; a control module for controlling the lifting or lowering of the opening/closing plate of the smart valve according to the flow rate, pressure, or temperature state sensed by the sensing module; and an administrator terminal for transmitting and receiving control signals to and from the control module, wherein the power generation module comprises: a conical fluid guide member provided in a direction in which the fluid is supplied; and a rotating member rotated by the fluid guided through the fluid guide member, whereby the operation of the smart valve can be controlled by manipulating the administrator terminal at a remote location, so as to supply the fluid into the pipe or intercept the supply of the fluid into the pipe.