Tidal energy is the energy obtained from the movement of water due to ocean tides. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted on the oceans of the earth.
A tidal stream is a fast flowing body of water created by tides. Turbines are placed in tidal streams. When the tides hit the turbine, the turbine rotates and converts the tidal energy into electric energy.
Advantages of tidal energy:
1. Tidal energy does not produce any pollution.
2. It does not use any fuel and does not produce any waste.
3. Tides are predictable, so tidal energy can be produced at any time.
4. Water is denser than air and therefore can generate electricity at lower speeds than wind turbines.
