I have been working with this type of turbine, and the is application for VAWT tech today, because they work great in a home-energy harvesting applications. The fact that there is little sound, and they work in any direction is a plus for residential intalllations. Additionally, the gear boxes can be positioned on the ground, which is a big plus. Another feature that is interesting, but not mentioned here is that certain types, inlcuding the mixed Darrieus - Savonius VAWT also works in low wind conditions.
Very interesting technology approach for less than one megawatt wind turbines. With traditional wind turbines going to larger and larger power plants, it will be interesting to see if this techology that approaches the problem from a completely different point of view can gain traction. Thanks.
Thank you for the informative article about this. I am not sure about a large-scale deployment, but I know that where I live in Portugal some friends who deploy wind turbines on their land in the countryside prefer the vertix axis turbines for some of the reasons you cite--like the noise factor--and also because they aren't as harmful to birds that sometimes fly into the horizontal blades. I think there is definitely a good case to use these type of turbines on a larger scale, and appreciate your bringing this issue to light.
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Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.