paragraph on tidal energy in 150 words not from google plzz
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Tidal power or tidal energy is a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity.
Although not yet widely used, tidal energy has potential for future electricity generation. Tides are more predictable than the wind and the sun. Among sources of renewable energy, tidal energy has traditionally suffered from relatively high cost and limited availability of sites with sufficiently high tidal ranges or flow velocities, thus constricting its total availability. However, many recent[when?] technological developments and improvements, both in design (e.g. dynamic tidal power, tidal lagoons) and turbine technology (e.g. new axial turbines, cross flow turbines), indicate that the total availability of tidal power may be much higher than previously assumed, and that economic and environmental costs may be brought down to competitive levels.
Historically, tide mills have been used both in Europe and on the Atlantic coast of North America. The incoming water was contained in large storage ponds, and as the tide went out, it turned waterwheels that used the mechanical power it produced to mill grain.[1] The earliest occurrences date from the Middle Ages, or even from Roman times.[2][3] The process of using falling water and spinning turbines to create electricity was introduced in the U.S. and Europe in the 19th century.[4]
The world's first large-scale tidal power plant was the Rance Tidal Power Station in France, which became operational in 1966. It was the largest tidal power station in terms of output until Sihwa Lake Tidal Power Station opened in South Korea in August 2011. The Sihwa station uses sea wall defense barriers complete with 10 turbines generating 254 MW.[5]
Answer:
Tidal power or tidal energy is a form of hydro-power that converts the energy obtained from tides into useful forms of power. Tidal energy has potential for future electricity generation. Tides are more predictable than the wind and the sun.
Tidal power is taken from the Earth's oceanic tides. Tidal forces are periodic variations in gravitational attraction exerted by celestial bodies. These forces create corresponding motions or currents in the world's oceans. Due to the strong attraction to the oceans, a bulge in the water level is created, causing a temporary increase in sea level. As the Earth rotates, this bulge of ocean water meets the shallow water adjacent to the shoreline and creates a tide. This occurrence takes place in an unfailing manner, due to the consistent pattern of the moon's orbit around the earth.
The world's first large-scale tidal power plant was the Rance Tidal Power Station in France, which became operational in 1966. It was the largest tidal power station in terms of output until Sihwa Lake Tidal Power Station opened in South Korea in August 2011.
Tidal power is a known green energy source, at least in terms of emitting zero greenhouse gases. It also doesn’t take up that much space. Another benefit of tidal power is that it is predictable. The gravitational forces of celestial bodies are not going to stop anytime soon. Furthermore, as high and low tide is cyclical, it is far easier for engineers to design efficient systems, than say, predicting when the wind will blow or when the sun will shine. Tidal power plants can last much longer than wind or solar farms, at around four times the longevity.
A 2010 report commissioned by the US National Oceanic and Atmospheric Association and titled ‘Environmental Effects of Tidal Energy Development’ identified several environmental effects, including the “alteration of currents and waves”, the “emission of electro-magnetic fields” (EMFs) and its effects on marine life, and the “toxicity of paints, lubricants and anti-fouling coatings” used in the manufacturing of equipment. Electro-magnetic emissions might also disrupt the sensitive marine life. Fellow PNNL marine ecologist Jeff Ward said the organisation was observing how EMFs damage the ability of juvenile Coho salmon to recognise and evade predators, or the negative impact on Dungeness crabs to detect odours through their antennules.
There’s no avoiding the fact that tidal power holds one of the heaviest up-front price tags. The proposed Swansea Bay Tidal Lagoon project in Wales, UK, is priced at £1.3bn ($1.67bn). The aforementioned Sihwa Lake Tidal Power Station cost $560m, and the La Rance cost 620 million francs back in 1966.
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