Tidal energy – and tidal stream energy in particular – is a particularly reliable source of renewable energy because it is predictable and guaranteed, irrespective of the weather.
How does it work?
The tides are ultimately created by the Earth’s rotation, together with its gravitational interaction with the moon and sun. Tidal stream power is inexhaustible, predictable (out to 100 years and beyond) and has a smaller environmental footprint than some other forms of renewable energy.
While there are various tidal turbine designs, they all use the movement of the tides to slowly rotate, activating a generator that produces electricity.