HYPOTHESIS AND THEORY article
Front. Mar. Sci.
Sec. Coastal Ocean Processes
Wave power extraction performance from Edinburgh Duck WEC integrated with floating breakwater
Provisionally accepted
R. R. Vidyabhushan
Debabrata Karmakar*- National Institute of Technology, Karnataka, Mangalore, India
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The performance of Edinburgh Duck wave energy converter (ED-WEC shows a great potential when integrated with oceanic structures. In the present study, the wave energy extraction performance of ED-WEC integrated to a box type Floating Breakwater (FBW) is investigated based on small amplitude wave theory with an idea of harnessing maximum wave energy from the scattered and reflected waves in the presence of offshore structures. The scattered and reflected waves from marine structures approaches towards WEC which in turn increases the wave power absorption of WECs. The associated scattered and reflected waves for wave interactions with hybrid structures are studied and the capture width ratio (CWR), the wave power absorption, the motion amplitude and the mean interaction factors of ED-FBW hybrid system are discussed. The hydrodynamic coefficients play an important role while evaluating CWR, wave power absorption and mean interaction factor. The numerical results are analysed for different structural and geometrical parameters such as width of ED, draft of ED, distance between ED-WEC and FBW and wave incident angle. Further, the numerical results obtained for box type FBW are compared with trapezoidal type FBW, -type FBW, parabolic type FBW and semi-circular type FBW. The power absorbed abs P by the integrated ED-WEC is noted to increase in the narrow region of wave period. In addition, the increase in draft of the ED results in increase of submergence volume and variation in the hydrodynamic coefficients. In the case of an isolated system for deep water depth, the variation in CWR in 33 is observed to be within 4.16% 31.25% CWR while in 44 , it is 52.54% 66.1% CWR . The study performed will be helpful in optimizing the ED-WEC-FBW configuration in the real sea state condition and provide a potential solution of generating power along with the coastal defence structure. Keywords: Floating breakwater; Edinburgh Duck WEC; Hydrodynamic performance; Wave power absorption; Conversion efficiency; Mean interaction factor.
Keywords: Conversion efficiency, Edinburgh Duck WEC, floating breakwater, Hydrodynamic performance, Mean interaction factor, wave power absorption
Received: 13 Oct 2025; Accepted: 28 Nov 2025.
Copyright: © 2025 Vidyabhushan and Karmakar. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Debabrata Karmakar
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