Ocean wave energy extraction

F - Mech Eng,Light,Heat,Weapons – 03 – B

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Details

F03B 13/24 (2006.01) E02B 9/08 (2006.01) F03B 13/14 (2006.01)

Patent

CA 2271021

A parabolic or part parabolic focusing device located in the ocean comprises wall sections (5) which converge a parallel ocean wavefront to foci (9, 10) located in an air compression chamber (11) located between the wall sections (5), thereby providing a wave amplification effect. An oscillating wave surface produces an oscillating air column inside the chamber (11) to drive a self-rectifying turbine located in an outlet at the top of the chamber. The turbine comprises a rotor with radially oriented aerofoil shaped blades which are symmetrical in cross section about a transverse plane so that the turbine rotates in a single direction regardless of the oscillations in the air column. Several mechanisms to vary the pitch of the blades are also disclosed.

Dispositif de concentration parabolique ou semi-parabolique situé dans l'océan et comprenant des sections de paroi (5) faisant converger un front de vagues parallèles vers des points de concentration (9, 10) situés dans une chambre de compression d'air (11) située entre les sections de paroi (5), ce qui produit un effet d'amplification des vagues. Une surface de vague oscillante produit une colonne d'air oscillante à l'intérieur de la chambre (11), ce qui commande une turbine à rectification automatique placée dans une sortie au sommet de la chambre. Cette turbine comprend un rotor comportant des aubes à profil aérodynamique orientées dans un sens radial et dont la section transversale est symétrique autour d'un plan transversal, de sorte que la turbine tourne dans un seul sens indépendamment des oscillations dans la colonne d'air. L'invention concerne également plusieurs mécanismes permettant de modifier le pas des aubes.

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