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Performance Analysis of Multiple Wave Energy Converters Placed on a Floating Platform in the Frequency Domain

1
Multidisciplinary Graduate School Program for Wind Energy, Jeju National University, Jeju 63243, Korea
2
Department of Ocean System Engineering, Jeju National University, Jeju 63243, Korea
*
Author to whom correspondence should be addressed.
Energies 2018, 11(2), 406; https://doi.org/10.3390/en11020406
Received: 7 December 2017 / Revised: 27 January 2018 / Accepted: 6 February 2018 / Published: 9 February 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
Wind-wave hybrid power generation systems have the potential to become a significant source of affordable renewable energy. However, their strong interactions with both wind- and wave-induced forces raise a number of technical challenges for modelling. The present study undertakes a numerical investigation on multi-body hydrodynamic interaction between a wind-wave hybrid floating platform and multiple wave energy converters (WECs) in a frequency domain. In addition to the exact responses of the platform and the WECs, the power take-off (PTO) mechanism was taken into account for analysis. The coupled hydrodynamic coefficients and wave exciting forces were obtained from WAMIT, the 3D diffraction/radiation solver based on the boundary element method. The overall performance of the multiple WECs is presented and compared with the performance of a single isolated WEC. The analysis showed significant differences in the dynamic responses of the WECs when the multi-body interaction was considered. In addition, the PTO damping effect made a considerable difference to the responses of the WECs. However, the platform response was only minimally affected by PTO damping. With regard to energy capture, the interaction effect of the designed multiple WEC array layout is evaluated. The WEC array configuration showed both constructive and destructive effects in accordance with the incident wave frequency and direction. View Full-Text
Keywords: multi-body dynamics; interaction; floating platform; WEC (Wave Energy Converter); PTO (Power Take-Off) multi-body dynamics; interaction; floating platform; WEC (Wave Energy Converter); PTO (Power Take-Off)
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MDPI and ACS Style

Lee, H.; Poguluri, S.K.; Bae, Y.H. Performance Analysis of Multiple Wave Energy Converters Placed on a Floating Platform in the Frequency Domain. Energies 2018, 11, 406.

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