Where Does Tidal Energy Come From?

Tidal energy comes from the rising and falling of oceanic tides, where water moves because of the gravitational relationship between the Earth and the moon. The Earth's rotation is also a component of tidal energy. Tidal power is a promising form of energy because it is renewable and widely available.

Three main methods of generating tidal power exist: a tidal steam generator, a tidal barrage and dynamic tidal power. A tidal stream generator harvests the kinetic energy from moving water to power turbines, while a tidal barrage exploits the potential energy in the height difference between a high tide and a low tide through a system of dams. Dynamic tidal power is a theoretical model that combines aspects of the previous two systems.