An active resonance C-type buoyant flap wave energy converter includes a rigid frame, a flap, a mass center adjustment assembly and a power generation assembly. The rigid frame is connected to a marine facility, and includes a main body and a support shaft provided at a bottom thereof. The flap is swingingly arranged on the support shaft. The flap is located under water surface, and swings back and forth around the support shaft under an action of a wave. The mass center adjustment assembly is configured to adjust a mass center of the flap to make a natural period of the flap same as a wave period, so as to achieve a resonance between the flap and the wave. The power generation assembly is arranged on the support shaft and is located in the flap.

The present invention provides a drag-type turbine capable of efficiently extracting kinetic energy of fluid particles orbiting in waves and a wave power generator comprising said drag-type turbine. This turbine is a single bucket drag-type turbine with a single half-pipe bucket and a counterweight oppositely facing the bucket, where fluid particles in orbital motion in a wave impel the bucket and the counterweight to rotate them as a unitary body.

An active resonance C-type buoyant flap wave energy converter includes a rigid frame, a flap, a mass center adjustment assembly and a power generation assembly. The rigid frame is connected to a marine facility, and includes a main body and a support shaft provided at a bottom thereof. The flap is swingingly arranged on the support shaft. The flap is located under water surface, and swings back and forth around the support shaft under an action of a wave. The mass center adjustment assembly is configured to adjust a mass center of the flap to make a natural period of the flap same as a wave period, so as to achieve a resonance between the flap and the wave. The power generation assembly is arranged on the support shaft and is located in the flap.

A wave energy absorber is provided for use with a wave energy converter, the absorber having one or more body portions arranged to engage hydrodynamically with a water flow from waves of a body of water, the one or more body portions having a rotational axis about which the one or more body portions are arranged to rotate. The one or more body portions are asymmetrical about the rotational axis. The present invention aims to provide an improved energy capturing member for use with the wave energy converter which allows a pressure difference to be created by the wave energy absorber that is ultimately converted into useful energy, done using a smaller and lighter structure.

A wave energy converter apparatus includes a platform that is configured to float below an upper liquid surface of a liquid responsive to the wave energy converter apparatus being disposed in the liquid. The wave energy converter apparatus further includes support structures mounted to an upper platform surface of the platform. The wave energy converter apparatus further includes a supporting shaft coupled to the support structures, the supporting shaft being disposed along an axis. The supporting shaft is configured to be oriented with the axis substantially perpendicular to direction of waves of the liquid. The wave energy converter apparatus further includes a helical member rotatably coupled to the supporting shaft and configured to rotate about the axis. The wave energy converter apparatus further includes an electrical rotary generator coupled to the helical member. The electrical rotary generator is configured to generate electricity responsive to rotation of the helical member.

A wave energy converter apparatus includes a platform that is configured to float below an upper liquid surface of a liquid responsive to the wave energy converter apparatus being disposed in the liquid. The wave energy converter apparatus further includes support structures mounted to an upper platform surface of the platform. The wave energy converter apparatus further includes a supporting shaft coupled to the support structures, the supporting shaft being disposed along an axis. The supporting shaft is configured to be oriented with the axis substantially perpendicular to direction of waves of the liquid. The wave energy converter apparatus further includes a helical member rotatably coupled to the supporting shaft and configured to rotate about the axis. The wave energy converter apparatus further includes an electrical rotary generator coupled to the helical member. The electrical rotary generator is configured to generate electricity responsive to rotation of the helical member.

A wave energy capture, storage, and conversion assembly, including a first screw pump assembly, including a screw including a first end and a second end, and a tube at least partially encircling the screw, the tube including a third end and a fourth end, and a first point absorber operatively arranged to displace the screw in a first circumferential direction.

A wave-driven power generation device of converting gravity work is illustrated, which has two power generation modules, a pulley module and two transmission mechanism structures. The pulley module has a rail and a counterweight part, wherein the counterweight part moves back and forth along the rail in a first direction or a second direction due to wave fluctuation, and the first direction and the second direction are two opposite directions. The transmission mechanism structure has a driving part and a gear module rotating with the driving part, wherein the driving part moves along the first direction or the second direction accompanying with movement of the counterweight part, the gear module rotates with the shaft of the rotator set, and the shaft of the rotator set is kept to rotate in respect to a rotating direction to continue to generate the electrical energy due to transmission of the gear module.

A wave power plant (1), comprising a body (1) and a rotator (3) supported on the body. The body (1) is a rather flat, panel type element, which is moored with respect to the propagation direction of waves in such a way that the dimension of the body (1) in the propagation direction of waves is smaller than the draft of the body (1). The body (1) has its diagonally opposite corners provided with substantially horizontally protruding fins (4, 5), which bring about swaying of the body (1) in lateral direction, i.e. in the plane of the panel type element, in response to the vertical motion of water.

The invention relates to a device for converting kinetic energy of a flowing water into kinetic energy of a rotatable rotor shaft, wherein the device is adapted to be effective in a first flow direction and a second flow direction substantially opposite to the first, wherein the device comprises two rotor blades each connected to a blade shaft coupled to the rotor shaft for transfer of a torque relative to the rotor shaft, wherein the blades are each rigidly connected to their blade shaft, the blade shafts are mounted for rotation about their own axis relative to the rotor shaft, the blade shafts are coupled to each other for rotation in the same rotation direction and the rotor blades each have an asymmetrical cross-section. There is hereby always flow against the asymmetrical rotor blades from the same direction relative to the blade during the energy conversion process, so that the profile of the rotor blades can be optimized for this flow direction.