Multi-DOF WEC Performance in Variable Bathymetry Regions Using a Hybrid 3D BEM and Optimization

Markos Bonovas, Kostas Belibassakis and Eugen Rusu
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Markos Bonovas: School of Naval Architecture and Marine Engineering, National Technical University of Athens, 15780 Athens, Greece
Kostas Belibassakis: School of Naval Architecture and Marine Engineering, National Technical University of Athens, 15780 Athens, Greece
Eugen Rusu: Department of Mechanical Engineering, University Dunarea de Jos of Galati, 800008 Galați, Romania

Energies, 2019, vol. 12, issue 11, 1-18

Abstract: In the present work a hybrid boundary element method is used, in conjunction with a coupled mode model and perfectly matched layer model, for obtaining the solution of the propagation/diffraction/radiation problems of floating bodies in variable bathymetry regions. The implemented methodology is free of mild-slope assumptions and restrictions. The present work extends previous results concerning heaving floaters over a region of general bottom topography in the case of generally shaped wave energy converters (WECs) operating in multiple degrees of freedom. Numerical results concerning the details of the wave field and the power output are presented, and the effects of WEC shape on the optimization of power extraction are discussed. It is demonstrated that consideration of heave in combination with pitch oscillation modes leads to a possible increase of the WEC performance.

Keywords: renewable energy; marine environment; wave energy converters; variable depth effects; multi-DOF WECs; design optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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