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1. Context
Hydroelectricity produces 3,500 TWh/year worldwide. Tidal energy has an equivalent potential, but produces only 1 TWh/year. This difference is difficult to explain, as tidal energy has some major advantages:
the available energy is concentrated, and we can produce 10 to 40 GWh/year/km 2 of reservoir, whereas hydroelectricity produces 3,500 TWh/year on over 350,000 km 2 of reservoirs, i.e. less than 10 GWh/year/km 2 . The cost per MWh of creating large tidal reservoirs is lower than the average cost of dam reservoirs;
we can use hydroelectric turbines, or tidal turbines, with a manufacturing cost per kW close to that of onshore wind turbines;
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EMR Symposium: Brest 2013
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