Tidal turbines for tidal energy conversion
Waves of the ocean are one source of energy on earth that is renewable and abundant. The waves crashing on the shore holds most viewers and visitors to a sea beach in awe and astonishment. The waves increase in force and amplitude with the tide coming in. This tide occurs due to the mixed forces of the sun’s gravitational pull along with that of moon and the earth’s rotation itself. This occurrence of the tides high and low has very predictable frequency and a recurring phenomenon till these natures'elements are present.
As early as the twelfth century, tides and its energy, that is tidal energy, have been used by mankind for its personal use. Tidal mills had then been made to grind grain and corn. With the advent of windmill and waterwheels the tide mills took a back seat and have become near extinct as of now. France was the first to get into this study with the setting up of an electricity generation plant using tidal energy, and maybe now builders London can focus on redeveloping the same.
Barrages, which are dams but of larger dimensions, are constructed at the bottom of the tidal basin. The barrage has gates which allow the tidal basin to get flooded when the tide comes in with a high tide and then the emptying of the basin takes place during the low tide albeit through a turbine. This generates power that can be used by the human race.
There are also tidal fences that are built to generate electricity using tidal energy. Upon the fence there are vertical axis turbines that are mounted and water is forced to pass through these turbines. Tidal fences have been found to be cheaper to construct than tidal barrages.
Wind turbines and tidal turbines are similar by general characteristics. Tidal turbines though are costlier to construct and lay but these types of turbines have more capacity to generate energy. Tidal turbines have an added advantage that they are least damaging to the environment, which is one more important factor in human life as on date.
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