FRANCE. Tidal Barrage. Company/Organization - Electricite de France (EDF) Technology/Plant Name - La Rance Barrage Technology Genre - Tidal Barrage Power take-off system - Bulb Turbine
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Company/Organization - Electricite de France (EDF)
Technology/Plant Name - La Rance Barrage
Technology Genre - Tidal Barrage
Power take-off system - Bulb Turbine
La Rance Tidal Barrage was built in the 1960's near St. Malo in France. A dam 330 metres long was build in front of a 22 square kilometer basin. The tidal range (the difference between high and low tides) averages 8 metres and reach up to 13.5 metres. The plant consists of 24 bulb type turbine generators 5.35 metres in diameter, 470 tonnes in weight, and rated at 10MW each which generate electricity whether the tide is going in or out (developed by Électricité de France). This peak of 240MW of power is sufficient to power 4% of the homes in Brittany - equivalent to the consumption of a town the size of Rennes. The average power generated is 68MW for an annual output of around 600 million kWh units of electricity. In November 1996 the La Rance tidal power plant celebrated 30 years of active service during which time 16 billion kWh of electricity were generated without major incident or mechanical breakdown. The initial capital cost of the power plant (620 million Francs) has long since been recovered, and the cost of electricity production is now below 0.02 Euro per kWh.
Company/Organization - Pole Mer Bretagne
Technology/Plant Name - Marenergie
Technology Genre - Horizontal Axis Turbine - Ducted
Power take-off system – Unspecified
Use the force of tidal currents to generate electricity, is the idea of society Hydrohelix who gathered around the project MARENERGIE / SABELLA, eight companies and research centers. The partners are developing the offshore installation of a first turbine of 200 kW: a large diameter turbine, coupled to an electric generator that will transform the kinetic energy of tidal currents into electrical energy sent by cable to the coast. After a test period, a 1 MW module production consists of five turbines will be connected to the network.
The use of tidal, astronomical origin, predictable power and not subject to the vagaries of weather, is one of the answers to the reduction of fossil fuels, diversification of sources, and use of renewable energy and not generating greenhouse gases
SEAREV, EcoleCentrale de Nantes, France
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