Patent ID: 7315093
Filing Date: 2008-01-01
Classification: F03D,F05B,H02S,Y02B,Y02E

Abstract:
1. A system comprising: a wind turbine; and a deflector; wherein the wind turbine is mounted on a roof of a building and positioned to enable the wind turbine to be driven by wind flow which is passively concentrated by a vertical face of the building and flows up and over the edge of the roof; wherein the wind turbine comprises a cylindrical turbine structure having an axis about which a plurality of turbine blades rotate, and wherein the wind turbine is oriented with the axis parallel to the edge of the roof; wherein the wind turbine is positioned adjacent to a parapet wall extending vertically from the edge of the roof, and wherein the wind turbine is positioned such that the parapet wall screens at least a portion of the wind turbine from the concentrated wind flow, wherein the screened portion of the wind turbine is counter-rotating with respect to the concentrated wind flow wherein the deflector is attached to the parapet wall and configured to further screen the counter-rotating portion of the wind turbine from the concentrated wind flow while allowing the concentrated wind flow to reach a portion of the wind turbine that rotates with the concentrated wind flow.