Wind power is another alternative energy source that could be used without producing by-products that are harmful to nature. Like solar power, harnessing the wind is highly dependent on weather and location. However, it is one of the oldest and cleanest forms of energy and the most developed of the renewable energy sources.
There is the potential for a large amount of energy to be produced from windmill.
Different parts of our country, which are windy most of the time, have windmills to pump water and generate electricity. These wind mills are big wind-wanes in which wind energy is used. Let us look into the working of a windmill.
A windmill is basically a mechanical arrangement to convert wind energy into another form of energy. It has blades. The blades of the windmill rotate in a vertical plane which is kept perpendicular to the wind. As wind flow crosses the blades of the windmill, the blades start rotating. The rotation of blades makes the turbine rotate.
The turbine is attached with an electrical generator which converts mechanical energy of the turbine into electrical energy. The blades are angled into the wind, so as to rotate in a way which maximize the generation of electricity.
In older windmills, wind energy was used to run machinery to do physical work, like crushing grain or pumping water. Wind towers are usually built together on wind farms. Now, electrical currents are harnessed via large scale wind farms that are used by national electrical grids, as well as small individual turbines used for providing electricity to isolated locations or individual homes.
The wind speed is vital in the production of electricity, and the optimum speed is approximately 25 km/h and this causes the blades to rotate.