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Energies 2017, 10(3), 289; doi:10.3390/en10030289

Optimizing the Performance of Solo Duck Wave Energy Converter in Tide

Department of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, Guangdong, China
Department of Engineering Science, Uppsala University, Uppsala 75121, Sweden
Author to whom correspondence should be addressed.
Academic Editor: Stephen Nash
Received: 24 January 2017 / Accepted: 22 February 2017 / Published: 28 February 2017
(This article belongs to the Special Issue Numerical Modelling of Wave and Tidal Energy)
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The high efficiency performance of the Edinburgh Duck wave energy converter (WEC) in 2D regular wave tests makes it a promising wave energy conversion scheme. A solo Duck WEC will be able to apply the point absorber effect to further enhance its performance. Since released degree of freedom will decrease the efficiency, a Duck WEC with fixed pitching axis will be a better option. However, for fixed supported WECs, tide is a non-ignorable consideration. In this paper, a movable mass method is utilized in the whole tidal range to not only balance the Duck to appropriate beak angles, but also follow the variation of hydrodynamic coefficients to keep cancelling the reactance of the system impedance so that complex conjugate control can be realized to optimize the power capture performance of the Duck WEC in tide. Results show that the beak angle should be adjusted to as large a value as possible so that the response amplitude of the Duck at maximum relative capture width will be reasonable small, and the lowest weight of the movable mass is found when its designed position locates at the center of the Duck profile. View Full-Text
Keywords: solo Duck; hydrodynamic coefficients; complex conjugate control; maximum relative capture width; movable mass method solo Duck; hydrodynamic coefficients; complex conjugate control; maximum relative capture width; movable mass method

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, J.; Yao, Y.; Li, W.; Zhou, L.; Göteman, M. Optimizing the Performance of Solo Duck Wave Energy Converter in Tide. Energies 2017, 10, 289.

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