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Limits to tidal current power

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  • Garrett, Chris
  • Cummins, Patrick

Abstract

Estimating the extractable power of tidal currents in channels is a practical question that has received attention recently. Analysis has clearly shown that the power potential is not given by the flux of kinetic energy, as has been commonly assumed. A general formula for the maximum available power is reviewed, along with assessments of the reduction if only partial fences are used, as would be required for navigational and ecological reasons. In typical situations, the maximum power obtainable may be achieved with a surprisingly small number of turbines, especially if allowance is made for the flow reduction caused by drag on the supporting structures of turbines which reduces the maximum power available. Finally, the flow through tidal turbines is compared with the cooling water demands of nuclear reactors generating the same power.

Suggested Citation

  • Garrett, Chris & Cummins, Patrick, 2008. "Limits to tidal current power," Renewable Energy, Elsevier, vol. 33(11), pages 2485-2490.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:11:p:2485-2490
    DOI: 10.1016/j.renene.2008.02.009
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    References listed on IDEAS

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    1. Bryden, Ian G. & Couch, Scott J., 2007. "How much energy can be extracted from moving water with a free surface: A question of importance in the field of tidal current energy?," Renewable Energy, Elsevier, vol. 32(11), pages 1961-1966.
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    Keywords

    Tidal current power;

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