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Waves hold a large amount of unused energy, from which we can use to generate power to at least a portion of the world’s everyday electricity. It can contribute to over ten percent to the world’s electricity. Waves are always present the ocean waters so we can say that the wave energy is renewable.
But still we are not using the wave energy effectively for power generations it is only used in rare parts of the world. The entire planet can be powered with 0.2 percent of the waves in the ocean.The tough part is coming up with ways to turn this power into usable energy.
Waves reaching the shore can be used like a piston to push air up and down a large pipe. The force of the air being pushed is used to run a turbine. This turbine is attached to a generator that creates the electricity.
There are many devices that are used to convert wave energy into electricity called as Wave Energy Converters (WECs).
Some of them are terminators, oscillating water columns(OWCs), overtopping device, salter’s duck, attenuator, pelamis, point absorber, etc. A detail explanation of these devices are given under wave energy devices, so from there one could understand a lot on how wave energy and the wave energy devices works.
The place where the waves are converted into other useful forms like electricity is called as Wave Farm.
Thus we can obtain a simple idea of how wave energy is generated.