Two-buoy and single-buoy floating wave energy converters: A numerical comparison

Demin Li, Xiaochen Dong, Alistair G.L. Borthwick, Sanjay Sharma, Tianyuan Wang, Heao Huang and Hongda Shi

Energy, 2024, vol. 296, issue C

Abstract: A numerical model of two-buoy and single-buoy floating wave energy converters (WECs) is developed based on a modified nonlinear version of WEC-Sim. The model is validated against experimental data from a 1:5 geometric scale model of a two-buoy floating WEC. Nonlinear behavior is primarily attributed to viscous damping and mechanical friction effects. It is found that a modified version of WEC-Sim obtained by correcting the phase of the wave excitation force in the source code provides an accurate representation of a two-buoy WEC operating in either linear or nonlinear mode. An equivalent single-buoy WEC is modeled by locking the two-buoys together. The two-buoy WEC exhibits more than double the predicted maximum energy capture efficiency than its single-buoy counterpart within the range of numerical tests considered. Simulations of idealized floating WECs in conditions representative of Zhaitang Island, China indicate that the maximum energy capture efficiency may be enhanced by 13 % when using a two-buoy system instead of a single-buoy WEC. The findings should be useful to practitioners involved in the design of floating wave energy converters.

Keywords: Floating two-buoy wave energy converter; Physical model test data; Modified nonlinear WEC-Sim model; Comparison of energy capture (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:296:y:2024:i:c:s0360544224009927

DOI: 10.1016/j.energy.2024.131219

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