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Chapter 7: Marine Energy

Chapter 7: Marine Energy

pp. 217-272

Authors

, Cardiff University, , University of Peradeniya, Sri Lanka
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Extract

Tidal range generation, tidal stream generation and wave power are discussed. The tidal energy resource is described, together with the use of harmonic constituents to predict the height of the tide and velocity of the tidal flow at a location. The principles of tidal range generation are discussed and ebb generation is illustrated. The main components of a tidal range scheme are explained as well as the potential environmental impact of any large tidal range scheme. Tidal barrages are compared with tidal lagoons. The generation of electricity from tidal streams is discussed and examples of the tidal stream resource provided. Tidal stream turbines are described and compared with wind turbines using axial momentum theory. Simple water wave theory is summarized and the use of the wave height and wave period to describe of the wave power resource is described. Prototyped devices for wave power generation are described and the power that would be generated by a wave power device wave climate is shown. The chapter is supported by 8 examples, 15 questions with answers and full solutions in the accompanying online material. Further reading and online resources are identified.

Keywords

  • tidal range
  • tidal stream
  • wave power
  • tidal lagoon
  • tidal barrage
  • harmonic constituent
  • tidal stream turbine
  • wave height
  • wave period

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