WAVE ENERGY EXTRACTION DEVICE AND METHOD

摘要

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).

主权项

1. A wave energy extraction device to extract energy from water waves through forwards and backwards motion of the device, for use with a wave energy conversion apparatus to convert that energy to a useful form, the device having a height and a width and being arrangeable on the wave energy conversion apparatus so as to be at least partially submerged in the water and comprising:
a first surface arranged to oppose a mean water wave direction, the first surface being concave about a vertical axis of symmetry of the device; and a second surface disposed opposite the first surface and being convex about the vertical axis of symmetry of the device so as to be able to extract power from the crest and the trough of the wave.