The gravitational pull of sun and moon, along with the earth’s rotation causes tides. The tidal movement of water represents a great deal of energy. As water flows from higher level to a lower one, it can be used to generate electricity. Tidal power is trapped by placing a barrage across an estuary and forcing the tidal flow to pass through turbines. Water power converts the motion of waves into electrical or mechanical energy. Energy in water (in the form of kinetic energy, temperature differences or salinity gradients) can be harnessed and used. Since water is about 800 times denser than air, even a slow flowing stream of water, or moderate sea swell, can yield considerable amounts of energy.
Last modified: Wednesday, 28 December 2011, 11:18 AM
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