Encyclopedia of Ocean Engineering

Living Edition
| Editors: Weicheng Cui, Shixiao Fu, Zhiqiang Hu

Tidal and Ocean Current Turbines

  • Pengfei LiuEmail author
Living reference work entry
DOI: https://doi.org/10.1007/978-981-10-6963-5_188-1
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Introduction

Tides and Currents of Oceans

Over 70% of the Earth is covered by oceans in the world. These oceans are a vast renewable energy source. Energy stored in oceans can be mainly categorized as thermal energy; kinetic energy due to tides, waves and currents; and chemical and biological energies. Tides are caused by planetary motion to produce the flow of seawater. Because the Earth, its Moon, and the Sun rotate around each other, the gravitational movement of the Moon and the Sun with respect to the Earth (see Fig. 1) causes huge amount of water to flow around the Earth’s oceans, creating periodic shifts in these moving bodies of water. These vertical shifts of water are called “tides” (Alternative Energy Tutorials 2018).
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Notes

Acknowledgments

The author would like to thank Professor Jonathan Whiting, Pacific Northwest National Laboratory, on behalf of Annex IV, for granting the copyright of Fig. 4 and Springer for the free copyright of Figs. 1, 6, and 7.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.School of Engineering, Newcastle UniversityNewcastle upon TyneUK

Section editors and affiliations

  • Zhen Gao
    • 1
  1. 1.Norwegian University of Science and TechnologyTrondheimNorway