Wind Energy

Wind energy is a renewable source of energy generated from wind power. At the end of 2006, worldwide capacity of wind generators was 73,904 MW, producing more than 1% of the global electrical energy requirement.

Although still a relatively minor source of electricity for most countries, wind energy production has increased almost five times between 1999 and 2006, and in some countries, the share of wind energy in total energy consumption is significant: Denmark ( 23%), Spain (8%), Germany (6%).

Winds are formed because the sun doesn't heat the Earth uniformly, which creates air movements. Kinetic energy of wind can be used to rotate some turbines, which are able to generate electricity. Some turbines can produce 5 MW, although this requires a wind speed of approximately 5.5 m / s or 20 km per hour. Few areas on earth have these wind speeds, but the strongest winds can be found at higher altitudes and in oceanic areas: Denmark (23%), Spain (8%), and Germany (6%).

Wind energy is used extensively today, with new wind turbines being built all over the world, wind energy is the energy source with the fastest growth in recent years. Most turbines produce power over 25% of the time, and even more during winter, when winds are stronger.

Global technical potential of wind energy is considered capable of providing five times more energy than is now consumed. This level would require 12.7% of the Earth surface (excluding oceans) to be covered by parks turbines, assuming that the land would be covered with 6 large wind turbines per square kilometer. These figures do not take into account improving turbine efficiency and technical solutions.

Source: Wikipedia