Abstract
The information of the wave loads on a wave energy device in operational waves is required for designing an efficient wave energy system with high survivability. It is also required as a reference for numerical modeling. In this paper, a novel system, which integrates an oscillating wave energy converter with a pile-restrained floating breakwater, is experimentally investigated in a 2-D wave flume. The measurements of the wave pressure on the wet-surface of the device are made as the function of the power take-off (PTO) damping force. It is shown that the wave pressure is significantly affected by the PTO system, in particular, at the edges, and the wave pressure varies under different wave conditions. From the results, conclusions can be drawn on how the PTO damping force and wave conditions affect the loads on the device, which is of engineering concern for constructing safe and reliable devices.
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Henderson R. Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter [J]. Renewable Energy, 2006, 31(2): 271–283.
Yao Q., Wang S. M., Hu H. P. One the development and prospect of wave energy power generation device [J]. Ocean Development and Management, 2016, 33(1): 86–92 (in Chinese).
Newman J. N. Marine hydrodynamics [M]. Cambridge, USA: MIT Press, 1977.
Michailides C., Angelides D. C. Modeling of energy extraction and behavior of a flexible floating breakwater [J]. Applied Ocean Research, 2012, 35(1): 77–94.
Arena F., Romolo A., Malara G. et al. On design and building of a U-OWC wave energy converter in the Mediterranean Sea: A case study [C]. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering-OMAE. Nantes, France, 2013, V008T09A102.
He F., Huang Z. H. Hydrodynamic performance of pile-supported OWC-type structures as breakwaters: An experimental study [J]. Ocean Engineering, 2014, 88: 618–626.
Chen B., Liu C. Q., Kang H. G. Performance of floating breakwater double used as wave energy converter [C]. Proceedings of the International Offshore and Polar Engineering Conference. Hawaii, USA, 2015, 888–892.
Shi Q., You Y. X., Wei G. et al. The wave forces and moments on a floating rectangular box in a two-layer fluid [J]. Journal of Hydrodynamics, Ser. B, 2006, 18(3): 166–170.
Li Y., Lin M. Wave-current impacts on surface-piercing structure based on a fully nonlinear numerical tank [J]. Journal of Hydrodynamics, 2015, 27(1): 131–140.
Diamantoulaki I., Angelides D. C., Manolis G. D. Performance of pile-restrained flexible floating breakwaters [J]. Applied Ocean Research, 2008, 30(4): 243–255.
Koutandos E. V. Pontoon breakwaters-efficiency and loads-effect of attached plate layout[J]. International Review of Civil Engineering, 2010, 1(2): 143–153.
Chen L., Sun L., Zang J. et al. Numerical study of roll motion of a 2-D floating structure in viscous flow [J]. Journal of Hydrodynamics, 2016, 28(4): 544–563.
Göteman M., Engström J., Eriksson M. et al. Wave loads on a point-absorbing device in extreme waves [J]. Journal of Ocean and Wind Energy, 2015, 2(3): 176–181.
Zhang X. T., Yang J. M., Xiao L. F. An oscillating wave energy converter with nonlinear snap-through power-take-off systems in regular waves [J]. China Ocean Engineering, 2016, 30(4): 565–580.
Koutandos E. V., Prinos P., Gironella X. Floating breakwaters under regular and irregular wave forcing-reflection and transmission characteristics [J]. Journal of Hydraulic Research, 2005, 43(2): 174–188.
Ning D., Zhao X., Göteman M. et al. Hydrodynamic performance of a pile-restrained WEC-type floating breakwater: An experimental study [J]. Renewable Energy, 2016, 95: 531–541.
Li Y. C., Teng B. Wave action on maritime structure [M]. Beijing: China Ocean Press, 2015 (in Chinese).
Babarit A., Hals J., Muliawan M. J. et al. Numerical benchmarking study of a selection of wave energy converters [J]. Renewable Energy, 2012, 41: 44–63.
Koftis T. H., Prinos P., Koutandos E. V. 2D-V hydrodynamics of wave–floating breakwater interaction [J]. Journal of Hydraulic Research, 2006, 44(4): 451–469.
Isaacson M., Nwogu O. U. Wave loads and motions of long structures in directional seas [J]. Journal of Offshore Mechanics and Arctic Engineering, 1987, 109(2): 126–132.
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Project supported by the National Natural Science Foundation of China (Grant No. 51379037).
Biography: Xuan-lie Zhao (1989-), Male, Ph. D. Candidate
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Zhao, Xl., Ning, Dz., Göteman, M. et al. Effect of the PTO damping force on the wave pressures on a 2-D wave energy converter. J Hydrodyn 29, 863–870 (2017). https://doi.org/10.1016/S1001-6058(16)60798-9
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DOI: https://doi.org/10.1016/S1001-6058(16)60798-9