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On the Impact of Long-Term Wave Trends on the Geometry Optimisation of.pdf (3.416Mb)
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Title
On the impact of long-term wave trends on the geometry optimisation of oscillating water column wave energy converters
Author
Peñalba Retes, Markel
Author (from another institution)
Ulazia, Alain
Esnaola, Ganix
Serras, Paula
Research Group
Mecánica de fluidos
Published Date
2020
Publisher
Elsevier Ltd.
Keywords
ERA5
Wave energy trends
Wave energy converters
Oscillating water column
Geometry optimisation
Abstract
Wave trends have been shown to be relevant to energy generation in various areas of the world. Accordingly, this article describes the impact of wave trends on the design of oscillating water column w ... [+]
Wave trends have been shown to be relevant to energy generation in various areas of the world. Accordingly, this article describes the impact of wave trends on the design of oscillating water column wave energy converters. First, wave trends across the North-East Atlantic Ocean are analysed based on the ERA5 reanalysis. In addition, an empirical model that provides the capture width of an oscillating water column is employed, identifying an approximately linear relationship between the average wavelength and the optimal width of the chamber. Thus, combining wave trends and the empirical model, the optimal size of the chamber is found to vary signifficantly between different geographical locations and over the four decades between 1979 and 2018. Differences between the original geometry and the geometry optimised considering wave trends, reach up to 15% in some locations. As a consequence, oscillating water column chambers designed based on past available resources rather than the resource corresponding to the time when the device is to be deployed are demonstrated to be inefficient, with a signifficant difference in the optimal width and absorbed energy of the chamber. Accounting for changes in resource availability over time may assist in cost optimisation of unconventional renewable energy technologies. [-]
URI
http://hdl.handle.net/20.500.11984/1768
Publisher’s version
https://doi.org/10.1016/j.energy.2020.118146
ISSN
0360-5442
Published at
Energy  Vol. 206. N. artículo 118146, 2020
Document type
Article
Version
Submitted
Rights
© 2020 Elsevier Ltd.
Access
Embargoed Access (until 2022-09-01)
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  • Articles - Engineering [183]
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