Diagrams shows a room that using light shelves to create a bright area, as well as allows natural sun light to fall on the other side of the room. The diagrams also show light shelves being used to direct passive light inside the room.
How Works : When you talk about modern wind you're looking at two primary designs: horizontal-axis and vertical-axis. Vertical-axis wind turbines (VAWTs) are pretty rare. The only one currently in commercial production is the Darrieu