Wave energy comes from ocean waves generated by wind blowing over the surface of the water. There is a lot of energy in ocean waves. Wave power devices extract this energy directly from the motion of the waves or pressure fluctuations below the surface. One method of generating electricity works similarly to a reverse pool wave machine, where waves cause air to move in and out of a chamber, turning a turbine connected to a generator. While wave energy is renewable and produces no waste, a consistent wave source is required and devices must withstand rough weather.

1. Wave Energy

2. Where does it come from?The energy comes from waves. Waves are caused by wind blowing over the ocean. In many areas of the world, the wind blows with enough consistency and force to provide continuous waves. There is tremendous energy in the ocean waves.Wave power devices extract energy directly from the surface motion of ocean waves or from pressure fluctuations below the surface.

3. How is electricity produced?There are several methods of getting energy from waves.One of them works like a swimming pool wave machine in reverseAt a swimming pool, air is blown in and out of a chamber beside the pool, which makes the water outside bob up and down, causing waves. At a wave power station, the waves arriving cause the water in the chamber to rise and fall, which means that air is forced in and out of the hole in the top of the chamber.We place a turbine in this hole, which is turned by the air rushing in and out.The turbine turns a generator.

4. What are the advantages?The advantages of Wave Energy are:It is completely renewable.The energy is free - no fuel needed, no waste produced.Not expensive to operate and maintain.Can produce a great deal of energy.

5. What are the disadvantages?The disadvantages of Wave Energy are:It depends on the waves - sometimes you'll get loads of energy, sometimes almost nothing.Needs a suitable site, where waves are consistently strong.Some designs are noisy. But then again, so are waves, so any noise is unlikely to be a problem.Must be able to withstand very rough weather.

6. Referenceshttp://ocsenergy.anl.gov/guide/wave/index.cfmhttp://www.darvill.clara.net/altenerg/wave.htm

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