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Effect of the PTO damping force on the wave pressures on a 2-D wave energy converter

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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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References

  1. 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.

    Article  Google Scholar 

  2. 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).

    Google Scholar 

  3. Newman J. N. Marine hydrodynamics [M]. Cambridge, USA: MIT Press, 1977.

    Google Scholar 

  4. 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.

    Article  Google Scholar 

  5. 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.

    Google Scholar 

  6. 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.

    Article  Google Scholar 

  7. 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.

    Google Scholar 

  8. 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.

    Article  Google Scholar 

  9. 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.

    Article  Google Scholar 

  10. Diamantoulaki I., Angelides D. C., Manolis G. D. Performance of pile-restrained flexible floating breakwaters [J]. Applied Ocean Research, 2008, 30(4): 243–255.

    Article  Google Scholar 

  11. Koutandos E. V. Pontoon breakwaters-efficiency and loads-effect of attached plate layout[J]. International Review of Civil Engineering, 2010, 1(2): 143–153.

    Google Scholar 

  12. 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.

    Article  Google Scholar 

  13. 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.

    Article  Google Scholar 

  14. 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.

    Article  Google Scholar 

  15. 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.

    Article  Google Scholar 

  16. 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.

    Article  Google Scholar 

  17. Li Y. C., Teng B. Wave action on maritime structure [M]. Beijing: China Ocean Press, 2015 (in Chinese).

    Google Scholar 

  18. 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.

    Article  Google Scholar 

  19. 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.

    Article  Google Scholar 

  20. 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.

    Article  Google Scholar 

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Correspondence to De-zhi Ning  (宁德志).

Additional information

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

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