Wave Energy also known as Ocean Wave Energy, is another type of ocean based renewable energy source that uses the power of the waves to generate electricity. Unlike tidal energy which uses the ebb and flow of the tides, wave energy uses the vertical movement of the surface water that produce tidal waves.
Wave power converts the periodic up-and-down movement of the oceans waves into electricity by placing equipment on the surface of the oceans that captures the energy produced by the wave movement and converts this mechanical energy into electrical power.
The 4 main types of wave energy devices are:
- Point Absorbers - which are tethered to the ocean floor.
- Wave Attenuators – which are long horizontal semi-submerged snake-like devices.
- Oscillating Water Column – which converts wave energy into air pressure.
- Overtopping Devices – where the sea waves are driven up the ramp filling-up a small tidal reservoir.