Virtual Access Services

HOMERE

IFREMER – HOMERE

HOMERE is a wave hindcast database produced by IFREMER. It was developed with the objective of providing a relevant dataset suitable for research activities related to wave resource characterization and adapted to engineering studies for the design of marine structures and more specifically offshore energy converters.
HOMERE was built running the wave model WaveWatch III® in a configuration based on an up-to-date parameterization for wave generation and dissipation terms also taking a realistic sea-bed roughness mapping into account.
The model is forced using the wind field from the CFSR reanalysis that was produced at NCEP in 2010. Forcing also includes water levels and tidal currents which were recomposed from an atlas of harmonic components built from a dataset computed using the MARS 2D (Model for Applications at Regional Scale) hydrodynamic model.
Mesh size of the high resolution unstructured computational grid evolves from about 10 km offshore down to 200 m near-shore. Optimization criteria for grid resolution refinement take into account both the depth variation and the wave propagation velocity. The domain of the model extends from the South of the North Sea to the North of Spain covering the whole continental shelf in the Bay of Biscay. Global parameters and frequency spectra are saved at each point of the high resolution computational grid while directional spectra are saved on a coarser grid. The initial duration of the simulation, 19 years, has now been extended to 22 years running over the period [1994-2015] with a one hour time step.

For additional information on HOMERE please email marinet2_tna@ifremer.fr or call +332 98 22 47 33

CENER1

CENER – Windbench

In 2013 CENER developed the Windbench web portal for managing repositories for the verification and validation (V&V) of wind farm models (www.windbench.net). An overarching goal of the platform is to share common V&V procedures across wind energy disciplines to improve interdisciplinary research for the development of models of different fidelity levels. Due to the high complexity of the full system, a building-block validation process is established to systematically test if model implementations lead to the expected physical response and to assess their predictive capacity based on wind energy quantities of interest.

Validation cases are defined in terms of model-intercomparison benchmarks where code developers and end-users participate to compare their results with each other and against observational data. The website manages the documentation of these cases and the data required to run simulations. Visualization tools are available to perform online evaluation of results with standardized fit-to-purpose metrics. Access-control to data is managed online through administration of user-account access rights.

After a few years of operation, the site now has around 200 users and hosts data from various European and International projects and is progressively becoming a reference for validation data repositories.

For additional information on Windbench please email jsrodrigo@cener.com or call +34 608247890.

Skipheia Met Station

NTNU – Skipheia Met Station

The Skipheia Met Station contains two 100 metre met masts providing data collected by ultrasonic anemometers.  The site is located at the west end of the island Froya, outside Trondheim in mid Norway and is exposed to winds both from the Norwegian Sea and the mainland.  It is therefore of interest to evaluate the usefulness of the measurements in order to characterise the wind conditions as representative for “on-shore” and “off-shore” wind, depending on the wind direction.  In addition, it is desired to evaluate the site for a certification for a reference station for ocean observation buoys measuring wind, wave and sea current.

The site analysis of the met-station has been done in accordance with a guideline provided by the Measuring Network of Wind Energy Institutes (MEASNET).  Wind data for a two-year period are presented and evaluated and compared to long-term data from a regional weather station.  In the end, the long-term data are used for extrapolation of the on-site short-term measurements to a period of 15 years.  For MaRINET2 an extensive data-base of wind conditions measured over a time period of +6 years is offered.  Wind is measured using 12 2D ultrasonic Gill anemometers with a time resolution of 1HZ. Temperatures are also measured.

For additional information on Skipheia Met Station please email  or call +47 73593716