Wind Farms

Wind farms began in California in 1982 as a result of U.S. federal laws and incentives and mandates on avoided costs set by the California Energy Commission. At end of 2007 the installed capacity in the world was estimated at 95 gigawatts (GW), most of which, 94 GW, was in wind farms (Figure 1.12), with the major amount being installed in the European Union. The size of turbines

FIGURE 1.12 World installed capacity of wind turbines, primarily wind farms.


Number of Small Wind Systems in the World



Total, electric generation

Village power; wind, wind hybrid, wind-diesel


Farm windmill

600,000 1,800?

200? 300,000

has increased from 25-100 kW, 10-20 m diameter, to megawatt units, 60-100 m diameter, on towers of 80 to over 100 m. Over 1 GW has been installed in offshore wind farms. Production of electricity from wind farms is the cheapest source of renewable energy and is even less expensive than new coal and nuclear power plants. Wind power has grown at around 25% per year for the past few years, and global installation is predicted to reach 240 GW by 2012.

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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