To establish which energy source is best, we use six key metrics. Specifically, these are energy price, life span, energy generated […]
Tidal barrages are large scale energy generators that take advantage of sea level changes that occur between tides. They consist of a large dam that spans the width of a river, within which a series of gates is incorporated.3 As the tide rises, the water is allowed to flow through the gates in order to create a huge body of water,4 as much as 500 square kilometres in some places.5 The gates are then closed until the tide has lowered, at which point they are opened once more.6 This forces the water back through the gates, within which a series of hydraulic turbines is housed.7 The high-pressure water spins the turbines, which in turn generate large quantities of electricity.8 Unfortunately, despite the large amounts of energy tidal barrages can generate, they also come with a large price tag.9 This can usually be partially offset, as tidal barrages can double as bridges, flood defences, or even both.10 In addition to the cost, tidal barrages often cause significant damage to the environment. This includes the destruction of wildlife habitats and the interruption of marine animals’ travel routes.11 As a result, the development of tidal barrages is often considered unacceptable.12
To meet the UKs power demands, a body of water some 28% the size of the country would be required.21 This is based on the performance world’s largest tidal barrage in La Rance.
To be completed.
|Value for Money|||||★ ★ ★ ★ ★ ★|
|Reliability|||||★ ★ ★ ★ ★ ★|
|Eco-friendliness|||||★ ★ ★ ★ ★ ★|
|Global Potential|||||★ ★ ★ ★ ★ ★|
|Overall|||||★ ★ ★ ★ ★ ★|
To be completed.
Title image taken by Francois Boizot and reproduced under license from Shutterstock.
United States map created by SUPER RADICAL.
Image of Rance Tidal Power Station taken by Antoine2K and reproduced under license from Shutterstock.
World map based on data sourced from Boyle, Godfrey –’Renewable Energy: Power for a Sustainable Future’ – Oxford University Press – Page 227. World map created by SUPER RADICAL.
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