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Wind Power

Volume 473: debated on Thursday 13 March 2008

To ask the Secretary of State for Business, Enterprise and Regulatory Reform if he will estimate the number of days annually on which wind speed is insufficient to provide any usable power from wind generation in each area in which wind farms are located. (175776)

No such assessment has been made, However, a windspeed database is available on BERR's website at:

The geographical dispersion of wind farms means that the probability of having no wind across the entire country is extremely low.

A 2005 report by the Environmental Change Institute of the university of Oxford, on behalf of the DTI (now BERR) found that a typical wind turbine will generate electricity for 80 per cent. of the time. Wind power availability is greater during winter than at other times of the year, and is on average stronger during the day than overnight.

To ask the Secretary of State for Business, Enterprise and Regulatory Reform how many Vestas-type wind turbines have been built in the UK; and what recent checks on their safety have been carried out. (191864)

The Department does not keep statistics according to the brand of wind turbine. However, according to the British Wind Energy Association the number of onshore and offshore Vestas-type wind turbines that have been erected in the UK to date is 1,182.

Vestas carries out detailed safety inspections as part of a documented service and maintenance regime. In addition Vestas has taken the additional precautionary measure of implementing a Critical Component Inspection regime on all their turbines.