Energy & Green Tech

Field trials validate wind turbine wake steering impact at scale

If every turn of the wheel is a revolution, then every sweep of a wind turbine blade is an opportunity. That's how researchers at the National Renewable Energy Laboratory (NREL) view the potential for wind plant operators ...

Energy & Green Tech

Growth of wind energy points to future challenges, promise

Advances in adapting the technology for cold climates and offshore use and better methods for predicting wind conditions have fanned significant growth of the use of wind turbines for electricity in the last 40 years. A new ...

Energy & Green Tech

New Michael Moore-backed doc tackles alternative energy

What if alternative energy isn't all it's cracked up to be? That's the provocative question explored in the documentary "Planet of the Humans," which is backed and promoted by filmmaker Michael Moore and directed by one of ...

Energy & Green Tech

Fold-out energy tower for festivals is ready for practical use

Almost all festivals in Europe use polluting diesel generators as their power supply. As a sustainable alternative, TU/e researchers and 9 companies have developed a 21-meter high fold-out tower with solar collectors and ...

Energy & Green Tech

U.S. energy use rises to highest level ever

Americans used more energy in 2018 than in any other year, according to the most recent energy flow charts released by Lawrence Livermore National Laboratory (LLNL). Overall total energy consumption rose to 101.2 quadrillion ...

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Wind power

Wind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines. At the end of 2008, worldwide nameplate capacity of wind-powered generators was 121.2 gigawatts (GW). Wind power produces about 1.5% of worldwide electricity use, and is growing rapidly, having doubled in the three years between 2005 and 2008. Several countries have achieved relatively high levels of wind power penetration, such as 19% of stationary electricity production in Denmark, 11% in Spain and Portugal, and 7% in Germany and the Republic of Ireland in 2008. As of May 2009, eighty countries around the world are using wind power on a commercial basis.

Large-scale wind farms are connected to the electric power transmission network. Smaller turbines are used to provide electricity to isolated locations. Utility companies increasingly buy back surplus electricity produced by small domestic turbines. Wind energy as a power source is attractive as an alternative to fossil fuels, because it is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions; however, the construction of wind farms (as with other forms of power generation) is not universally welcomed due to their visual impact and other effects on the environment.

Wind power is non-dispatchable, meaning that for economic operation all of the available output must be taken when it is available, and other resources, such as hydropower, and standard load management techniques must be used to match supply with demand. The intermittency of wind seldom creates problems when using wind power to supply a low proportion of total demand. Where wind is to be used for a moderate fraction of demand, additional costs for compensation of intermittency are considered to be modest.

This text uses material from Wikipedia, licensed under CC BY-SA