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.
If realized this ambitious project, China would become a “wind superpower” by 2020 when reach to generate 230 gig watts of energy, power generation equivalent to thirteen of the Three Gorges dam, the world’s largest hydroelectric project.
This information was gathered from the report “Overview of China Wind Power 2010″, prepared by the Greenpeace environmental movement, the World Wind Energy (GWEC) and the Association of Renewable Energy Industries of China.
The document says that China led the world in 2009 with the installation of turbines, with 10,129 new devices that collect a capacity of 13.8 gig watts, which is installing a new turbine every time the country is currently asiático.China the second nation in the world that has more power capacity, second only to the United States. In addition, the signs are positive given that the Asian giant for the fourth consecutive year has doubled its generating capacity from wind power, which currently total 25.8 GW. Is a clear signal “the speed of wind power development in China is very remarkable,” said the secretary general as the Global Wind Energy Council, Steve Sawyer.
The head of Greenpeace – China Energy and Climate, Yang Alien, has ensured that the construction of wind farms “will serve to replace the energy generated by 200 plants that use coal.”
The wind project will affect positively on environmental matters, reducing 440 million tones off greenhouse gases in the atmosphere and creating half a million jobs.
The development of the sector of energy generation using wind energy (wind), we can confirm the presence and interest of the largest companies in the industry in the country as companies snivel (third place), Goldwin (fifth), Spanish Games (sixth) and Don Fang (seventh).
In 2010, China was the largest emitter of carbon dioxide, and committed himself to generate within a decade, 15 percent of its energy through fossil fuels, a nomenclature that also includes Beijing nuclear energy.