The wind turbine shown in figure below is a horizontal axis wind turbine. It is the most popular wind turbine used and it can be seen all around the world because of its higher efficiency than vertical axis turbines. The HAWT usually have their generator place on the top and they have a propeller-type rotor.
Horizontal Axis Wind Turbine
I'm curious about the efficiency issue. Some of the Vertical Axis Wind Turbine(VAWT) supplier claim that their wind turbine's efficiency is higher than the HAWT. Any evidence to proof?
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