Wind
Wind energy currently meets 0.5% of our energy needs, but it has the potential to produce far more.Wind energy is a popular and clean technology, and current reports suggest that a wind farm can pay for itself within six to eight months, although payback times are, of course affected by wind speed. Domestic wind turbines can attract grants from the Low Carbon Buildings Programme.
A single 125-metre wind turbine at GreenPark, Reading, Berkshire can generate some 4.5 million kilowatts of green electricity per year, enough to power 1 500 homes.
Turbines can be roof-mounted or free standing. They need good wind conditions, and open, exposed sites are preferable. To determine site suitability, initial wind measurement is useful, although organisations such as the Met Office may be able to help with data from nearby sites.
Because wind power is intermittent, either a grid connection or battery is necessary for back-up. A structural survey may also be necessary for roof-mounted systems, and planning permission may be required.
British Wind Energy Association Low Carbon Buildings Programme |
