Gain Immediate access to our Essays
FREE access exchanged for your work, or pay £9.99
... windmills have been used to pump water some several hundred years BC and windmills have been used to grind grain in Persia (Iran/Iraq) and the Middle East since 200BC. 22) Wind power has evolved from the use of simple, light devices driven by aerodynamic drag forces, to heavy, material intensive drag devices; to the increased use of light, material-efficient aerodynamic lift devices, today. 23) The first large windmill generating electricity was built in Cleveland, Ohio, in 1888 by Charles Brush. (Figure1.2). Despite its relative success in operating for twenty years, this windmill demonstrated the limitations of the low speed, high solidity rotor for electricity production applications. The 12 KW produced by its 17 meter rotor pales beside the 70-100KW produced by a comparably sized, modern, lift-type rotor. Figure 1.2 The Brush postmill in Cleveland, Ohio, 1888. The first use of a large windmill to generate electricity. In 1891, Poul ...