Posts Tagged ‘generate electricity’
The use of wind turbines to generate electricity on a large scale began in Denmark at the end of the last century and has spread worldwide. Through various components, wind turbine generators use their power to produce electricity.
The turbines are operated when the wind reaches a speed of about 19 to 21 km / h (ie, it takes a wind of at least moderate intensity, a breeze is not enough). When the wind stops, the wind farms use batteries to continue to deliver electricity. The wind turbine generators usually have a standard size (15 to 30 meters in diameter, with a capacity between 100 and 400 kW).
In Denmark and the Netherlands, where land-based turbines are typically located in flat terrain, offshore wind turbines produce 50 percent more energy than those in nearby onshore site. The reason is the low surface roughness of the sea.
On the other hand, the construction and installation of offshore foundations require 50 percent more energy than land. Finally, offshore wind turbines have a longer expected lifetime than onshore turbines, about 20 to 30 years.
The disadvantages of wind turbines are, for many users, aesthetic and environmental. Aesthetic because the presence of wind farms interrupted and disturbed by the vision of the landscape and environmental because the birds die because they can not avoid on your routes the blades of wind turbines. Given these disadvantages, the Danes notes:
Tjaereborg radar studies in the western part of Denmark, where there is installed a 2 MW wind turbine with a rotor diameter of 60 meters, show that birds (either day or night) tend to change their flight path about 100-200 meters before the turbine, and pass over it at a safe distance.