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.

An apparatus that floats at the surface of a body of water over which waves pass, causing a nominally vertical axis of the apparatus to tilt away from an axis normal to the resting surface of the body of water. Tilting allows a fluid to flow through a channel that in an un-tilted apparatus would require the gravitational potential energy of the fluid to increase (i.e., to flow uphill), but, because of the tilt allows the fluid to flow through the channel in a downhill direction. Successive wave-driven tilts of the apparatus incrementally raise water to a head from which a portion of its gravitational potential energy can be converted to electrical power by causing the water to return to a lower level by flowing through a water turbine, or through some other apparatus that performs a useful function when supplied with a flow of high-pressure water.

A renewable energy generation method includes: a first production process in which electric power is produced by converting wave energy into electrical energy using a plurality of power generators having the shape of a roly-poly-like capsule that floats in a sea; a storage process in which the electrical energy produced in the first production process is stored in a first hub connected to the power generators; and a transportation process in which the electrical energy stored in the first hub is transported to a predetermined place by use of a transportation.

The present disclosure provides a method and a device for converting the alternating motion produced by at least one float (202, 222) resting atop surface of a water body into unidirectional motion and converting that motion into usable energy. The method and device may be provided on a structure/vessel (206) or as the interface between the vessel and the water body surface. The vessel incorporating the device as such experiences a reduced effect of vertical perturbations from waves generated on the water body.

A multi-axial wave energy conversion device includes a carrier, a main body coupled to the carrier, a wave energy conversion assembly, a rotating mechanism, a lifting mechanism and a control unit electrically connected to the rotating mechanism and the lifting mechanism. The wave energy conversion assembly is coupled to the main body and includes an arm. The rotating mechanism is coupled between the carrier and the main body. The lifting mechanism is coupled between the arm and the main body. The control unit is for controlling the rotating mechanism to drive the main body to rotate relative to the carrier around a vertical axis for adjusting an orientation of the arm relative to the carrier, and further for controlling the lifting mechanism to drive the arm to rotate relative to the main body around a horizontal axis for adjusting an included angle between the arm and the main body.

A wave energy extraction device (or paddle) for converting wave energy into mechanical motion is curved in the horizontal plane, with a concave side (11) facing the incoming waves to increase energy capture and a convex side (12) on the lee side to reduce energy dissipation. The concave surface is substantially parabolic or semi-elliptical and the convex side is optionally provided with a substantially Gaussian profile (4) to improve the hydrodynamics and provide additional strength. To simplify connection to a base platform the paddle curvature optionally tapers to a straight edge (1) at the mounting points and the base device can be located either above or below the water surface. One embodiment is also curved about a vertical as well as the horizontal plane to create a spoon- or cup-shaped paddle (9).

A wave absorber element of the front pivot type for the absorption of wave energy from water has a front end comprising a front pivot axis around which the absorber element swings under operation, and an absorber element body substantially defined by a front side extending from the front end to a lower rear edge, a rear side extending from an upper rear edge to the lower rear edge, a top side extending from the front end to the upper rear edge, and lateral sidewalls defining the width of the absorber body in an axial direction parallel to the front pivot axis. The lower rear edge is located in a first radial direction from the pivot axis, the upper rear edge is located in a second radial direction from the pivot axis, and the first and second radial directions define an acute tip angle (alpha) of the absorber element.

A wave receiving mechanism includes: a shaft driving a hydraulic pump; and a wave receiving member including an arm and wave receiving plate, the arm unrotatably attached to the shaft, the plate being at the arm receiving a wave force, the wave receiving member swinging about the shaft by receiving the wave force and turning the shaft turn. The arm includes first and second arm portions, and a bendable portion, the first arm portion unrotatably attached to the shaft, the second arm portion being at the plate, the bendable portion coupling the first and second arm portions. When a swing angle of the first arm portion is less than a first predetermined angle, the bendable portion makes the arm portions swing integrally. When the swing angle of the first arm portion is the predetermined angle, the bendable portion allows the second arm portion to bend relative to the first.

This invention relates to a wave energy recovery apparatus with a power-take-off arrangement comprising at least a base, a reciprocating panel, two power-take-off (PTO) units with one or more generators to convert kinetic energy of waves or tidal currents to electricity, at least two gear transmissions operatively connected between the panel and the generators and at least two one-way clutch mechanisms to control the directions of rotation of the generators. The panel is arranged to rotate a half of the generators when rotating into one direction and another half of the generators when rotating into the opposite direction.

A multi-axial wave energy conversion device includes a carrier, a main body coupled to the carrier, a wave energy conversion assembly, a rotating mechanism, a lifting mechanism and a control unit electrically connected to the rotating mechanism and the lifting mechanism. The wave energy conversion assembly is coupled to the main body and includes an arm. The rotating mechanism is coupled between the carrier and the main body. The lifting mechanism is coupled between the arm and the main body. The control unit is for controlling the rotating mechanism to drive the main body to rotate relative to the carrier around a vertical axis for adjusting an orientation of the arm relative to the carrier, and further for controlling the lifting mechanism to drive the arm to rotate relative to the main body around a horizontal axis for adjusting an included angle between the arm and the main body.