One of the next stages in our plan to be carbon neutral is to start generating our own electricity for the site. We decided that the best way to do this is to put a wind turbine on the roof of our factory. However, the wind turbine in question will not be an off the shelf model, it will be a bespoke design based on a modification to a Savonius rotor. Although ours is not a particularly windy site (being in the middle of London and surrounded by lots of other taller buildings), we decided to go ahead with this project anyway for a number of reasons, but mainly to test out this new design. The configuration should lend itself very well to generating electricity from the wind flowing over buildings in urban environments.
Vertical axis wind turbines (VAWTs) like the Savonius rotor are more suited to urban environments for a number of reasons. Firstly they will turn whatever direction the wind is coming from whereas the more conventional horizontal axis wind turbines (HAWTs) must turn to face the wind in order to extract energy from it. Secondly, wind in urban areas is often very turbulent because of obstructions like buildings or trees. HAWTs don’t work very effectively in turbulent air but VAWTs are affected less severely. There are however, many issues to overcome before we can actually put the turbine on the roof…more about that another day…
