WINDWHEEL Russian patent published in 1999 - IPC

FIELD: wind-power engineering; wind-to- mechanical energy conversion. SUBSTANCE: windwheel has vertical shaft provided with brackets mounting hollow blades arranged in parallel with shaft axis; according to invention, each blade has closed airfoil only in center of its height and its sweep in vertical plane looks like axisymmetric figure one of whose sides positioned along shaft axis is its base which is higher than figure; the latter is converging as it recedes from base; mentioned sweep of blades is in the form of axisymmetric rectangle whose base is 1.5 to 2 times larger than its height. EFFECT: improved performance characteristics of windwheel. 2 cl, 5 dwg