How Does Wind Energy Work
Wind is the movement of air. Movement of air is caused by the uneven heating of the earth by the sun, during the time of day; the land gets heated at a more rapid rate when compared to the sea. Thus, the hot air, which is lighter, rises up and the cool air from the sea, rushes in to take its place. This is how wind is produced. Alternatively, this is how air attains its force or current.
When the wind blows, the air particles become active, and thus the wind attains a kinetic energy. Kinetic energy is the type of energy that can be captured and then put into use, just as how the kinetic energy is captured by hydroelectric plants, and is then used to generate electricity
Wind energy is all started by the sun and the process of heating. Once the air attains kinetic energy, it is ready to be harnessed and converted into electric energy. For the purpose of harnessing this kinetic energy, it is first required to set up a windmill. A wind mill consists of a rotor, or blades, normally 3 blades, a nacelle, that contains a gear box and a generator, a tower to support the drive train and the blades, and the ground support system such as electric cables, electric equipment etc.
These turbines are made up of steel and so is the tower. Some windmills operate without the gearbox also. The process wind energy starts mechanically when the blades of the windmill start to move or rotate with the force of the wind. As the blades rotate, it starts to turn the gearbox, which is connected to the generator. In addition, as the motor in the generator is rotated, electricity is produced. The amount of electricity produced, mainly depends on the size of the windmill and then pressure of the wind. The bigger and higher the wind mill, when there is enough current, the more is the electricity produced. The wind turbine that are being manufactured today, have a power ratings from 250 watts to 5 megawatts.
The electricity produced through the usage of wind energy, is mainly used, from olden times to crush grains as well as to pump water in order to irrigate the fields. The advantages of using wind energy are only being popularized now and thus there are great prospects in the future.
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