| By :
Roger Brown
The concept of a vertical wind turbine kit is becoming main stream and an economically viable choice for many people, especially in urban areas. Just a few years ago the wind turbine world was totally dominated by horizontal devices. The advantage of going for a vertical wind turbine kit are: Quieter - horizontals can be quite noisy. Verticals on the other hand can be almost silent and have a calming effect on people watching them. This is a big advantage in several ways - not only does it make you a better neighbor, but you have to live with the turbine as well. Wind turbines should be seen and not heard. The quieter and less noticeable they are, the better. Operate better in chaotic wind - the vertical wind turbine kit will allow you to install a wind turbine in most any wind condition. And, they aren't hampered by a tail assembly that attempts constantly find the dominate wind direction. This also makes them operate even better when they are next to each other in a relatively small area. Smaller footprint - horizontal wind turbines can take up a ton of space due to the large swept area of the blade path. This is ultimately the real promise of the vertical turbine and especially in kit form. The reason is that, because of their relatively small footprint, you can mount a number of them on a roof. With a regular garden variety horizontal device, there would be interference by having the units that close to each other. With verticals though, it actually IMPROVES the wind flow through to have them spaced strategically close together. Roof Effect is a very important concept to understand. That being said, the there are several types that make up the category: Savonius - this actually looks like a drum cut in half. These turbines have been around for quite a while (100's of years) and the have been used for everything from water paddlewheels to wind turbines. The concept is aerodynamic drag moving the blades around in a circle. Without question, there a lot more Savonius devices out there than any type of vertical device. Darieus - these turbines look like an eggbeater. They don't have a compact blade surface area so they tend to be quite tall. They are more efficient than Savonius type turbines. In conclusion, the vertical wind turbine kit can give you a quick return on investment if you are careful about getting what you need and not just what looks nice.
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