I prefer the VAWT or vertical axis wind turbine design, not because it is better or more efficient, but because they need less space to generate sufficient energy, which is optimal for someone who is looking to have one in their backyard. The VAWT can be lower to the ground since they have lower startup windspeeds. This is preferential for places that have mesas or plains and not a lot of hills.
These are my favorite, for their beauty as well as their efficiency.
“For many years, a fellow named Bil Becker has been hard at work developing hisAerotecture turbines. The turbines are elegant devices which incorporate bothSavonius and Darrieus styles into one turbine.”
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