The disadvantage of the vertical wind turbine comparatively to the horizontal wind turbine is the efficiency. In some cases, the efficiency of the energy produced of a VAWT can be less than the half of the production of a HAWT. The VAWT designs are also limited in height because of the sweep area available. The VAWT can only be installed on flat surfaces. Many VAWT types need to be started manually by giving an initial momentum or by an automatic starting mechanism because they have low starting torque.
Friday, March 13, 2009
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