Marine Energy Resources in the North Atlantic Yann-Hervé De Roeck.
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Transcript of Marine Energy Resources in the North Atlantic Yann-Hervé De Roeck.
Marine Energy Resources in the North AtlanticYann-Hervé De Roeck
Renewable energies on EarthAnnual balance, facts and figures
All yearly figures
l3 – IRENA Conference
Source: IAE-OES, http://www.ocean-energy-systems.org/ocean-energy-in-the-world/gis-map/
Non strictly resource related thresholdsBathymetry, population and EEZ
l4 – IRENA Conference
Hurricane Ivan track Source: NOAA
Wind climatology Source: Nasa
Winds over the North AtlanticSteady resource and extreme weather events
Radar image for wind EnviSat compared to meteorological model Arome (Météo-France)Average accuracy with respect to in situ measurement : 1.5 m/s and 20°,3% error in Weibull wind statistical parameters . Pixel: 950m x 950m. 400 km swath
Wind resource assessmentRemote sensing versus model hindcast
l6 – IRENA Conference
Source : Gunn & Stock-Williams (2012)
Source : previmer project,www.previmer.org
Waves over the North AtlanticAs for wind resource, better statistics at the 40-50 latitudes
Big statistical difference between leeward and windward coastsSource: PREVIMER
SAR image of the Iroise Sea (Cosmo SkyMed)
Ushent island offshore Brittany
Wave resource assessmentRemote sensing from synthetic aperture radar
Average accuracy with respect to in situ measurement : significative height: 30 cm,wavelength: 36 m, direction : 17°Pixel: 20km x 20km. 400 km swath
l8 – IRENA Conference
Tidal currents, mean velocitySource: Noveltis, http://tips.noveltis.com/
Ocean currents, mean velocitySource: RSMAS, Miami.
Currents over the North AtlanticTidal resource for the near future, ocean resource for midterm development
PassageKaki
Hao atollTuamotu archipelago
~50 km
Source: ‘Etude des courants de la passe « Kaki » de l’atoll de HaoEvaluation du gisement hydrolien’Ifremer - Auteurs : Damien MARIGLIANO, Marc TAQUET
2011 Ifremer study and monitoring:combined effects of tidesand waves coming from offshorebreaking on the coral reef
Current through passage (45%) > 1.5 m/scan reach 4 m/s
Potential :some tens of MWh/year
Possible exploitation :- main passage- hoas currents
Combined tidal and wave energy: the atoll caseTidal beating modulated by the outward current due to the drain of overtopping waves
l10 – IRENA Conference
TTemperature difference between 20 and 1000m Source: Rajagopalan & Nihous (2012)
Ocean Thermal Energy Conversion resourceThe revenge of the 20-20 latitudes
Needs for large sets of Environmental DataEfficiency and impact
1- Estimate and plan the MRE resourcea- LCOE depends on a 2 digit load
factor2- Design and size technologies
a- Energy conversion optimisationb- Sea state thresholds for
commissioning
3- Monitoring during exploitationa- Security / safeguardb- Optimal control for
productionc- Impact assessment
30 m
WERPO wave project for Grenada island
Openhydro-DCNS project for Bréhat, Alderney islands