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Dynamic tidal power (or DTP) is a theoretical technology that would exploit an interaction between potential and kinetic energies in tidal flows. It proposes that very long dams (for example: 30–50 km length) be built from coasts straight out into the sea or ocean, without enclosing an area.
Tidal range, harnessing potential energy from the height difference between high and low tides, impounding water in a tidal barrage or lagoon. Tidal stream , harnessing kinetic energy of the tidal streams and currents flowing around the coastline using free-stream turbines.
Tidal range is the difference in height between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun , by Earth's rotation and by centrifugal force caused by Earth's progression around the Earth-Moon barycenter .
The Rance Tidal Power Station. This article lists most power stations that run on tidal power, both tidal range (impoundment via a barrage) and tidal stream (harnessing currents). Since tidal stream generators are an immature technology, no technology has yet emerged as the clear standard.
The tidal range of tide at a particular place is 32 feet = 10 m (approx) The surface of the tidal energy harnessing plant is 9 km 2 (3 km × 3 km)= 3000 m × 3000 m = 9 × 10 6 m 2; Density of sea water = 1025.18 kg/m 3; Mass of the sea water = volume of sea water × density of sea water = (area × tidal range) of water × mass density
Tide mills are usually situated in river estuaries, away from the effects of waves but close enough to the sea to have a reasonable tidal range. Cultures that built such mills have existed since the Middle Ages, and some may date back to the Roman period. A modern version of a tide mill is the electricity-generating tidal barrage.
A 2006 study by Peel Holdings and the North West Development Agency identified the River Mersey as having considerable potential for tidal power. A pilot project, using a water wheel to harness tidal power, was considered at Bootle docks. [5] At the same time, a tidal barrage plan was evaluated, capable of generating 700 MW. [6]
Two types of Tidal Stream Generators Evopod - A semi-submerged floating approach tested in Strangford Lough with SeaGen in the background.. A tidal stream generator, often referred to as a tidal energy converter (TEC), is a machine that extracts energy from moving masses of water, in particular tides, although the term is often used in reference to machines designed to extract energy from the ...