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Energy generation - Wind Turbines
A wind turbine converts the power of the wind hitting the rotor blades of the turbine into rotational force that is converted into electrical energy by a generator.
In the UK relatively large turbines are required for anything other than minor applications - to provide the power for a medium sized home requires a 5 metre diameter rotor blade that is capable of generating around 5kw of power. This will need to be sited in a relatively clear location with an open vista, clear of buildings, trees and other potential barriers. Costs are likely to be between £10,000 & £20,0000.
Power output increases approximately eight times for a doubling in wind speed so a good location is vital.
Although many micro-generation methods are now permitted developments, planning permission is still required in the UK for wind turbines (although it is expected that this will change).
Once generated, there are then three options of what to do with the generated electricity:
- Use it to power electrical appliances!
- Store it locally - ‘batteries required’.
- Export it to the national grid - removing the need for battery storage.
You can read more on these options - energy storage options
Pros and Cons
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- A typical domestic installation in the UK will save around 1.2 tonnes of carbon dioxide per year.
- No emissions of CO2 so renewable and sustainable.
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- Moving parts! - can break!
- High cost - currently around £10,000 for a typical domestic installation in the UK.
- UK Planning permission required - can be a lengthy expensive process.