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A system for converting an airflow into mechanical or electrical energy and dimensioned to be attachable to a structure. The system includes a leading edge member, a pair of drawtube arrays, and an energy conversion device located between the pair of drawtube arrays and configured to convert an airf

A system for converting an airflow into mechanical or electrical energy and dimensioned to be attachable to a structure. The system includes a leading edge member, a pair of drawtube arrays, and an energy conversion device located between the pair of drawtube arrays and configured to convert an airflow through the channel into mechanical or electrical energy.

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The invention claimed is: 1. A system for converting an airflow into mechanical or electrical energy, comprising: a drawtube including: a tubular member defining a first end and a second end; and a leading edge member disposed adjacent to a windward side of a first opening at the first end of the t

The invention claimed is: 1. A system for converting an airflow into mechanical or electrical energy, comprising: a drawtube including: a tubular member defining a first end and a second end; and a leading edge member disposed adjacent to a windward side of a first opening at the first end of the tubular member; a base plate having an opening coupled to the second end of the tubular member; and an energy conversion device located within the tubular member and configured to convert an airflow through the tubular member into mechanical or electrical energy. 2. The system of claim 1, wherein the leading edge member is attached to the windward side of the first end of the tubular member. 3. The system of claim 1, further comprising a duct fluidly coupling the opening of the base plate and the second end of the tubular member. 4. The system of claim 1, wherein the base plate has a width approximately 1.5 to 4 times larger than a diameter of the tubular member. 5. The system of claim 4, wherein the width of the base plate is approximately 2.25 times larger than the diameter of the tubular member. 6. The system of claim 1, wherein the base plate has a height approximately 2 to 6 times larger than a diameter of the tubular member. 7. The system of claim 6, wherein the height of the base plate is approximately 3 times larger than the diameter of the tubular member. 8. The system of claim 1, wherein the leading edge member comprises a bluff body having a slight curvature. 9. The system of claim 1, wherein the leading edge member comprises a bluff body which is substantially planar. 10. The system of claim 9, wherein the substantially planar bluff body comprises a flat plate having an aspect ratio of 3:1. 11. The system of claim 1, wherein the energy conversion device comprises an embedded prop or generator. 12. The system of claim 1, wherein the energy conversion device comprises a turbine. 13. The system of claim 1, further comprising: a plurality of the drawtubes arranged side-by-side in an array and attached to a building structure; a plurality of the base plates having an opening coupled to the second end of the tubular member of a respective one of the drawtubes; and a plurality of the energy conversion devices each located within a respective one of the tubular member and configured to convert an airflow through the respective tubular member into mechanical or electrical energy. 14. The system of claim 13, wherein each of the plurality of base plates has a width approximately 1.5 to 4 times larger than a diameter of the tubular members. 15. The system of claim 14, wherein the width of each of the plurality of base plates is approximately 2.25 times larger than the diameter of the tubular members. 16. The system of claim 13, wherein each base plate has a height approximately 2 to 6 times larger than a diameter of the tubular members. 17. The system of claim 16, wherein the height of each base plate is approximately 3 times larger than the diameter of the tubular members. 18. The system of claim 13, wherein each of the plurality of base plates is attached to a respective one of the tubular members. 19. The system of claim 13, wherein the plurality of base plates are suspended in an array. 20. The system of claim 13, wherein the lead edge member of each of the plurality of drawtubes is attached to the windward side of the first end of a respective one of the tubular members. 21. The system of claim 13, wherein the lead edge members of the plurality of drawtubes are suspended in an array. 22. the system of claim 13, wherein the array of drawtubes is positioned to face directly into prevailing winds. 23. The system of claim 13, wherein the array of drawtubes extends substantially forward at an angle 45 degrees relative to a front surface of the building structure. 24. The system of claim 13, wherein each of the energy conversion devices comprises an embedded prop or generator. 25. The system of claim 13, wherein each of the energy conversion devices comprises a turbine.