Tidal Energy

Tidal energy devices exploit the natural rise and fall of coastal tidal waters resulting from the interaction of the gravitational fields of the sun and the moon. In some estuaries, the difference between high and low tide is accentuated and can create tidal ranges of up to 11 m. While several demonstration projects exist worldwide - notably a 240 MW barrage in La Rance, France, that has been operational since 1967 - there currently no major expansions of this technology anticipated. In addition, given that this resource is more geographically restricted than those above, it will not be discussed in more detail in this chapter.

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