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SEA DAMS - THE RANCE TIDAL POWER SCHEME
V. Ryan 2005 - 2023
 
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An alternative way of using the tide to generate electricity is seen below. As the tide comes in, sea water is allowed to enter the dammed area behind the sea wall. This drives turbines that produce electricity. The sluice gates are then shut to hold the sea water behind the dam wall. When the tide goes out, the sea water from inside the dam wall is allowed to flow back out by reopening the sluice gates. As water flows through the slices, it drives the same turbines which produce electricity a second time.
One of the few tidal power systems in the world is to be found in the Rance Estuary in France. It was constructed in 1966 and works on the principle seen below.

 
The turbines generatie electricity when the tide is coming in and going out (see animation below)
 
 
 
 
MORE DETAILED ANIMATION
 
 
 
 
THE RANCE TIDAL ELECTRICITY GENERATION SCHEME
 
 
 
 

QUESTIONS:

1. Find the location of the Rance Estuary on a map of France. Draw a simplified version of the map.

2. Find a photograph of the Rance Estuary tidal power station on the internet.

   
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