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| Maisondieu, Christophe; Le Boulluec, Marc. |
| When considering deployment of wave energy converters at a given site, it is of prime importance from both a technical and an economical point of view to accurately assess the total yearly energy that can be extracted by the given device. Especially, to be considered is the assessment of the efficiency of the device over the widest span of the sea-states spectral bandwidth. Hence, the aim of this study is to assess the biases and errors introduced on extracted power classically computed using spectral data derived from analytical functions such as a JONSWAP spectrum, compared to the power derived using actual wave spectra obtained from a spectral hindcast database. |
| Tipo: Text |
Palavras-chave: Wave energy; Wave spectra; Hindcast; Resource assessment. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00347/45799/45445.pdf |
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| Senechal, N; Dupuis, H; Bonneton, P; Howa, H; Pedreros, R. |
| The dissipation of the sea-swell frequency band energy (nominally 0.09 < f less than or equal to 0.3 Hz) and the distribution of low frequency band energy (nominally 0.005 less than or equal to f less than or equal to 0.09 Hz) on a transect crossing the surf and swash zones of a fine grained, gently sloping barred beach are investigated with data from a five element synchronous pressure sensor line deployed for 8 d. In this paper, we suggest a rational method to determine the frequency cut-off between the low frequency band and the sea-swell frequency band from the cross-shore evolution of the sea surface elevation energy density spectra. Sea-swell wave heights are depth limited, consistent with previous works whereas low frequency wave heights are... |
| Tipo: Text |
Palavras-chave: Cross-shore approach; Wave spectra; Wave dissipation; Infragravity waves. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43331/42896.pdf |
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| Li, Shuiqing; Zhao, Dongliang. |
| The ocean waves are generally mixed with wind wave and swell. In order to separate these two kinds of ocean waves, many wave spectral partitioning techniques have been proposed. In this study, a two-dimensional(2D) and three one-dimensional (1D) wave spectral partitioning techniques (denoted as PM, WH, and JP) are examined based on the model simulations and in-situ observations. It is shown that the 2D technique could provide the most reliable results as a whole. Compared with 2D technique, PM and JP techniques obviously overestimate the wind-wave components, and the same situation happens for WH technique at low wind speed. With the adjustment of the partitioning frequency ratio, the 1D PM technique is modified, in which the result agree well with that of... |
| Tipo: Journal Contribution |
Palavras-chave: Wind waves; Swell; Wave spectra. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5846 |
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