Wind energy is one of the best renewable energies available. Tapping this energy would require the installation of wind turbines. The wind turbines have blades that are rotated by the blowing wind. These blades are connected to a drive shaft that turns an electric generator to produce electricity. Installation of these wind turbines would require a huge inflow of

The working of these wind turbines is simple. When the sun heats up the air above the land, it expands and rises, giving its place to the cooler and heavier air above. This makes the wind to blow and over the airfoil shaped blades of the turbine causing them to turn. The blades are connected to a drive shaft that turns an electric generator to produce electricity.

The wind turbines are as much dependent on sun shining as it is dependent on the blowing wind. This is so because the blowing wind is the result of the sun shining.

Many new innovations and developments have taken place in the field of wind turbines. The turbines that are used in wind farms for commercial production of electric power are usually three-bladed and pointed into the wind by computer-controlled motors. These have tip speeds of up to six times the wind speed, high efficiency, and low torque ripple, which contribute to good reliability. The newer innovations have decreased the cost of producing electricity from wind 80% since 1980.