Wind turbines do not emit any pollutants during operation, however there are usually pollutants emit during the construction process. Clearly, wind energy today is a growing resource of renewable energy. A huge increase from the 2,500 MW in the year 2000. Brush.īy the end of 2011 the United States had just less than 43,000 MW of wind energy capacity. The first windmill converted into a wind turbine (by adding an electric turbine generator) was in 1887 in Cleveland Ohio, designed by Charles F. A windmill is different from a wind turbine because they do not generate electricity, they are were originally designed to grind grains or pump water. Wind turbines were not actually created until the late 1800’s, but the history of wind power dates back centuries through the ancestor of the wind turbine, the windmill. Wind maps are great tools for locating exceptional wind for wind turbine construction. Linear speeds of wind turbine blades are the highest at the tip. Every point on a wind turbine blade rotates with the same angular speed. The speed of the tip of a wind turbine blade is important for determining the optimum number of blades that a wind turbine needs. The cut-in speed of a wind turbine is the minimum wind speed needed to for a wind turbine to begin to generate electricity. Higher wind speeds are more desirable for wind turbines, although extremely high wind speeds can be dangerous for most wind turbines. Wind speed has a cubic relationship with electrical output of a wind turbine. Wind speed can be measured using an anemometer. Wind is described by both it’s speed and direction. Wind is the movement of a parcel of air within the earth’s atmosphere that always flows towards lower pressure areas. Wind speed is a huge factor in the efficiency of the location of a wind turbine. Higher average wind speeds bring higher power class rating numbers.
This is a rating system used to rate the quality of a location of a wind turbine. The HAWT is the more commonly used type of wind turbine, a style one will often see in modern day wind farms. The two most broadly defined types of wind turbines are horizontal-axis wind turbines (HAWT) and vertical-axis wind turbines (VAWT). The blades are designed to create an aerodynamic and rotational lift as wind passes over. The blades of wind turbines are designed with a similar aerodynamic model to an airplane wing. But this is a theoretical and maximum value of electrical output because the average wind turbine produces output at around a 20%-30% efficiency rate. The capacity factor for a large modern wind turbine is around 2MW. Betz’s law shows us that a maximum 59.3% of the kinetic energy of the wind can be converted into electricity.
It depends on wind speeds, the size of the blades and turbine, and the air density.
#HOME WIND ELECTRIC GENERATOR GENERATOR#
A wind turbine converts the mechanical energy of wind into electrical energy using an electric turbine generator that is fueled by the spinning blades of the wind turbine.
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