Annual Performance of the Second-Generation Variable-Geometry Oscillating Surge Wave Energy Converter

Kelly, Michael; Tom, Nathan; Yu, Yi-Hsiang; Wright, Alan; Lawson, Michael

doi:10.1016/j.renene.2020.11.075

Title: Annual Performance of the Second-Generation Variable-Geometry Oscillating Surge Wave Energy Converter

Journal Article · Wed Nov 18 00:00:00 EST 2020 · Renewable Energy

DOI:https://doi.org/10.1016/j.renene.2020.11.075· OSTI ID:1755694

Kelly, Michael ^[1];

^[2];

^[2]; Wright, Alan ^[2];

^[2]

Univ. of California, Berkeley, CA (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

Recent studies in wave energy have highlighted the need for a structured innovation approach in wave energy converter (WEC) design because cost-of-energy estimates have remained high. One specific innovation being investigated by the National Renewable Energy Laboratory is WEC geometry control, which uses control surfaces in combination with an oscillating surge WEC (OSWEC) to increase device availability and power generation while limiting structural costs. This study performs the first analysis of annual performance for a novel OSWEC with geometry control to understand how the geometry control affects availability, annual power generation, and structural loadings like the power-take-off (PTO) torque or surge foundation force. Device hydrodynamic coefficients are calculated using linear potential theory for six geometry configurations. A nonideal PTO system is assumed and quadratic viscous damping losses are considered. Annual performance is evaluated and compared for three U.S. wave energy sites. The WEC geometry and PTO system are controlled on a sea-state basis to optimize for power capture while remaining under limits set on motion amplitude and structural loads. Results indicate that geometry control can increase availability up to 25 days in an average year depending on design limits, increase average power generation, and significantly reduce peak structural loads.

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Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office; National Science Foundation (NSF)

Grant/Contract Number:: AC36-08GO28308; DGE 1752814

OSTI ID:: 1755694

Alternate ID(s):: OSTI ID: 1809701

Report Number(s):: NREL/JA-5700-76123; MainId:6417; UUID:7216c7f5-784f-ea11-9c31-ac162d87dfe5; MainAdminID:18984

Journal Information:: Renewable Energy, Vol. 177; ISSN 0960-1481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (14)

Development of a nearshore oscillating surge wave energy converter with variable geometry Tom, N. M.; Lawson, M. J.; Yu, Y. H. Renewable Energy, Vol. 96 https://doi.org/10.1016/j.renene.2016.04.016	journal	October 2016
Nearshore oscillating wave surge converters and the development of Oyster Whittaker, Trevor; Folley, Matt Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 370, Issue 1959 https://doi.org/10.1098/rsta.2011.0152	journal	January 2012
A database of capture width ratio of wave energy converters Babarit, A. Renewable Energy, Vol. 80 https://doi.org/10.1016/j.renene.2015.02.049	journal	August 2015
On the reversed LCOE calculation: Design constraints for wave energy commercialization de Andres, A.; Medina-Lopez, E.; Crooks, D. International Journal of Marine Energy, Vol. 18 https://doi.org/10.1016/j.ijome.2017.03.008	journal	June 2017
Design Specifications for the Hanstholm WEPTOS Wave Energy Converter Pecher, Arthur; Kofoed, Jens Peter; Larsen, Tommy Energies, Vol. 5, Issue 4 https://doi.org/10.3390/en5041001	journal	April 2012
The dynamics and power extraction of bottom-hinged plate wave energy converters in regular and irregular waves Gomes, R. P. F.; Lopes, M. F. P.; Henriques, J. C. C. Ocean Engineering, Vol. 96 https://doi.org/10.1016/j.oceaneng.2014.12.024	journal	March 2015
Spectral modeling of an oscillating surge wave energy converter with control surfaces Tom, Nathan; Lawson, Michael; Yu, Yi-Hsiang Applied Ocean Research, Vol. 56 https://doi.org/10.1016/j.apor.2016.01.006	journal	March 2016
Balancing Power Absorption Against Structural Loads With Viscous Drag and Power-Takeoff Efficiency Considerations Tom, Nathan; Yu, Yi-Hsiang; Wright, Alan IEEE Journal of Oceanic Engineering, Vol. 43, Issue 4 https://doi.org/10.1109/JOE.2017.2764393	journal	October 2018
Parametric modelling of a reconfigurable wave energy device Papillon, L.; Wang, L.; Tom, N. Ocean Engineering, Vol. 186 https://doi.org/10.1016/j.oceaneng.2019.06.010	journal	August 2019
Characteristics of a Pitching Wave Absorber with Rotatable flap Kurniawan, Adi; Moan, Torgeir Energy Procedia, Vol. 20 https://doi.org/10.1016/j.egypro.2012.03.015	journal	January 2012
A theory for wave-power absorption by oscillating bodies Evans, D. V. Journal of Fluid Mechanics, Vol. 77, Issue 1 https://doi.org/10.1017/S0022112076001109	journal	September 1976
Effect of non-ideal power take-off efficiency on performance of single- and two-body reactively controlled wave energy converters Falcão, António F. O.; Henriques, João C. C. Journal of Ocean Engineering and Marine Energy, Vol. 1, Issue 3 https://doi.org/10.1007/s40722-015-0023-5	journal	April 2015
Spectral modelling of wave energy converters Folley, M.; Whittaker, T. Coastal Engineering, Vol. 57, Issue 10 https://doi.org/10.1016/j.coastaleng.2010.05.007	journal	October 2010
Maximum wave-power absorption under motion constraints Evans, D. V. Applied Ocean Research, Vol. 3, Issue 4 https://doi.org/10.1016/0141-1187(81)90063-8	journal	October 1981

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