On Tidal Current Velocity Vector Time Series Prediction: A Comparative Study for a French High Tidal Energy Potential Site

Tawil, Tony El; Guillou, Nicolas; Charpentier, Jean-Frédéric; Benbouzid, Mohamed

doi:10.3390/jmse7020046

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…The superimposed effects of wind-generated surface-gravity waves were finally discussed (Section 4-(d)). Beyond a simple assessment based on the highest current magnitudes, these different evaluations provided crucial information identifying areas with (i) near-rectilinear tidal currents favorable for the implementation of fixedorientation turbines or (ii) with pronounced misalignments more adapted to devices with a yawing mechanism [19]. It also demonstrated the temporal variability of the available resource at semi-diurnal and fortnightly time scales which may be used to characterize the variability in energy extraction, and refine the design of energy converters (e.g., cut-in speed, rated power, etc.).…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variability of tidal-stream energy in north-western Europe

Guillou

Neill

Thiebot

2020

Phil. Trans. R. Soc. A.

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Initial selection of tidal stream energy sites is primarily based on identifying areas with the maximum current speeds. However, optimal design and deployment of turbines requires detailed investigations of the temporal variability of the available resource, focusing on areas with reduced variability, and hence the potential for more continuous energy supply. These aspects are investigated here for some of the most promising sites for tidal array development across the north-western European shelf seas: the Alderney Race, the Fromveur Strait, the Pentland Firth and the channels of Orkney. Particular attention was dedicated to asymmetry between the flood and ebb phases of the tidal cycle (due to the phase relationship between M 2 and M 4 constituents), and spring-neap variability of the available resource (due to M 2 and S 2 compound tides). A series of high-resolution models were exploited to (i) produce a detailed harmonic database of these three components, and (ii) characterize, using energy resource metrics, temporal variability of the available power density. There was a clear contrast between the Alderney Race, with reduced temporal variability over semi-diurnal and fortnightly time scales, and sites in western Brittany and North Scotland which, due to increased variability, appeared less attractive for optimal energy conversion. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

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Section: Introductionmentioning

confidence: 99%

Spatio-temporal variability of tidal-stream energy in north-western Europe

Guillou

Neill

Thiebot

2020

Phil. Trans. R. Soc. A.

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“…This nested products line was intended to be implemented in coastal flooding forecast systems in the scope of HOMONIM (Jourdan et al, 2020) and TANDEM (Hébert et al, 2014;Maspataud et al, 2015) projects. However, their diffusion on Shom's data portal facilitated their use for many other marine environment issues such as ecology, erosion, geology purposes (e.g., Furgerot et al, 2019;Tawil et al, 2019;Famin et al, 2020;Tew-Kai et al, 2020).…”

Section: Contextmentioning

confidence: 99%

Insights from topo-bathymetric and oceanographic dataset for coastal flooding studies: The French Flooding Prevention Action Program of Saint-Malo

Seyfried,

Biscara,

Michaud

et al. 2024

Preprint

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Abstract. The Action Program for Flood Prevention of Saint-Malo, France, requires the assessment of coastal flooding risks and the development of a local flooding warning system. The first prerequisite is a knowledge of the topography and bathymetry of the bay of Saint-Malo; the acquisition of new multibeam bathymetric data was performed in 2018 and 2019 to densify existing topo-bathymetric datasets and produce two high resolution (20 m and 5 m) topo-bathymetric digital terrain models. Second, the hydrodynamics associated with coastal flooding were investigated through a dense and extensive oceanographic field experiment conducted during winter 2018–2019, using a network of 22 moorings with 37 sensors : the network included 2 directional buoys, 2 pressure tide gauges, 18 wave pressure gauges, 4 single-point current meters, 7 current profilers and 4 acoustic wave-current profilers from mid-depth (25 m) up to the upper beach and the dike system. The oceanographic dataset thus provides an extended overview of hydrodynamics and wave processes in Saint-Malo bay, from coastal up to over-flooding and over-topping areas. It helps to identify the physical drivers of the coastal flooding, and provides a quantification of their respective contributions. In particular, the wave processes at the foot of the protection structures can be observed: in this macrotidal environment, during high spring tides, short and infragravity waves propagate up to the protection structures, while the wave set-up remains negligible, and overtopping by sea packs can occur. The combination of high-resolution topo-bathymetric and oceanographic datasets allows the construction, calibration and validation of a wave and hydrodynamic coupled model that is used to investigate more deeply flooding processes, and might be integrated in a future local warning system by Saint-Malo intercommunality. The topo-bathymetric and oceanographic datasets are available freely at doi: https://doi.org/10.17183/MNT_COTIER_GNB_PAPI_SM_20m_WGS84, https://doi.org/10.17183/MNT_COTIER_PORT_SM_PAPI_SM_5m_WGS84 and https://doi.org/10.17183/CAMPAGNE_OCEANO_STMALO (SHOM, 2020a, b, 2021).

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“…El Tawil et al [17] exploited this database to (i) recompose time series of tidal velocity based on tidal range evolution, (ii) characterize the available resource, and (iii) determine the optimal location for turbines with fixed horizontal-axis or a yaw. Such a simple method appears very promising in the first steps of a tidal farm project providing a very fast evaluation of the available resource [18,19]. More advanced resource characterization was, however, reached by exploiting regional tidal current harmonic databases derived from high resolution numerical simulations.…”

Section: Predictionsmentioning

confidence: 99%

The Tidal Stream Energy Resource of the Fromveur Strait—A Review

Guillou

Charpentier

Benbouzid

2020

JMSE

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Refined assessments of the available tidal stream energy resource are required to optimize turbines design and guarantee successful implementations and operations of devices in the marine environment. Investigations primary focused on identifying areas with maximum current speeds. However, further information may be reached by exhibiting (i) resource temporal variability, (ii) superimposed effects of meteo-oceanographic conditions (including especially wind-generated surface-gravity waves), and (iii) potential environmental impacts of operating turbines at the regional (e.g., changes in sediment transport and surrounding seabed features, effects on marine water quality, etc.) and local (wake-wake interactions and energy output) scales. These aspects are here investigated by reviewing a series of research studies dedicated to the Fromveur Strait off western Brittany, a region with strong potential for tidal array development along the coast of France. Particular attention is dedicated to the exploitation of combined in-situ and remote-sensing observations and numerical simulations. Beyond a site specific characterization of the tidal stream energy resource, this review promotes a series of original approaches and analysis methods for turbines optimization, thus complementing technical specifications to secure the key steps of a tidal energy project and promote the growth of a reliable tidal stream energy exploitation.

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On Tidal Current Velocity Vector Time Series Prediction: A Comparative Study for a French High Tidal Energy Potential Site

Cited by 13 publications

References 18 publications

Spatio-temporal variability of tidal-stream energy in north-western Europe

Spatio-temporal variability of tidal-stream energy in north-western Europe

Insights from topo-bathymetric and oceanographic dataset for coastal flooding studies: The French Flooding Prevention Action Program of Saint-Malo

The Tidal Stream Energy Resource of the Fromveur Strait—A Review

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