Kentish Flats Offshore Wind Farm
Vattenfall wholly owns and operates the Kentish Flats Offshore Wind Farm, comprised of 30 efficient wind turbines that produce 3MW each of electricity.
The Kentish Flats Offshore Wind Farm is a key element of the British Government's commitment to reduce the emission of greenhouse gases such as carbon dioxide, seeking to reverse the trend of climate change.
There are approximately 25 million households in the UK, and the annual production at Kentish Flats is 280 GWh, which corresponds to the consumption of 100.000 households*. (* 4000 KWh per household)
The Kentish Flats Offshore Wind Farm has set a dual record: The 30 turbine project was the largest wind turbine so far installed in the UK, and the farm was the largest wind farm in the UK, at the erection time in 2005.
The Site
The site for the Kentish Flats Offshore Wind Farm is a large, flat and shallow plateau north of Herne Bay and Whitstable approx 60 kilometers east of central London.
The wind farm is arranged in a regular grid of five east-west rows each of six turbines, sited in an area of 10 km2 just outside the main Thames shipping lanes. The spacing between each turbine and rows of turbines is 700 meters.
The generated electricity is fed into the electricity network via a sub-station at Herne Bay for use in the local grid serving the needs of the communities of North Kent around Canterbury, Herne Bay and Whitstable.
The site is easily accessed from the local maintenance port at Whitstable, which is only 30 minutes away by boat. The water depth is on average five meters.
| Item | Data |
|---|---|
| Wind turbine type (Vestas) | V90/3.0 |
| Total output | 90 MW |
| Expected annual output | 280, 000, 000 kWh |
| Rotor diameter | 90 m |
| Hub height | 70 m |
| Weight, blade | 6.6 tonne |
| Weight, nacelle | 68 tonne |
| Weight, rotor | 39.8 tonne |
| Weight, tower | 108 tonne |
| Weight, foundation | 247-292 tonne |
| Total weight per wind turbine |
463-508 tonne |
| Length of monopile | 38-44 m |
| Cut-in wind speed | 4m/s |
| Full power output from | 14 m/s |
| Cut-out wind speed | 25 m/s |
| Mean wind speed at 70 meters height | 8.7 m/s |
| Depth of water | 5 m |
| Distance from shore | 10 km |
| Distance between wind turbines | 700 m |
| Wind farm site | 10 km 2 |
| Project costs (GBP) | 105 million |
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