Wind turbine having airfoils for blocking and directing wind...

Details Wind turbine having airfoils for blocking and directing wind... Wind turbine having airfoils for blocking and directing wind...

F - Mech Eng,Light,Heat,Weapons

03

D

F03D 3/04 (2006.01)

Patent

CA 2543285

A wind turbine device (100) of increased efficiency is comprised of a set of fixed airfoils (104, 106) that direct wind into a rotor (102) having a plurality of blades (120, 122). The fixed airfoils may extend to the ground to increase the amount of wind directed into the rotor and may be manufactured from concrete. The rotor blades have a vented portion (114) near the axis of rotation that has been found to increase efficiency for certain blade geometries. For other blade geometries, increased efficiency is observed with no gap at the axis of rotation. The rotor may also be manufactured from composite materials to increase strength while decreasing the moment of inertia for the rotor.

La présente invention concerne une éolienne (100) à rendement accru. Elle comporte une pluralité de déflecteurs fixes (104, 106) qui dirigent le vent dans un rotor (102) à plusieurs pales (120, 122). Ces déflecteurs, qui peuvent partir du sol pour augmenter le volume d'air envoyé sur le rotor, peuvent être en béton. Près de l'axe de rotation, les pales du rotor comportent une zone évent (114) qui s'est avérée augmenter le rendement pour certaines géométries des pales. Pour d'autres géométries des pales, on observe une augmentation du rendement sans évidement au niveau de l'axe de rotation. Le rotor peut également être en matériaux composites de façon à en augmenter la résistance mécanique tout en diminuant le moment d'inertie.

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