Research paper: Numerical modelling of hydrodynamics and tidal energy extraction in the Alderney Race: a review
The Royal Society (Publishing) has featured the TIGER research paper ‘Numerical modelling of hydrodynamics and tidal energy extraction in the Alderney Race: a review’ in its ‘Philosophical Transactions A’ journal (volume 378, issue 2178) as part of the theme ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.
Published: 27 July, 2020
Authors: Jérôme Thiébot, D. S. Coles, Anne-Claire Bennis, Nicolas Guillou, Simon Neill, Sylvain Guillou and Matthew Piggott
The tides are a predictable, renewable, source of energy that, if harnessed, can provide significant levels of electricity generation. The Alderney Race (AR), with current speeds that exceed 5 m s−1 during spring tides, is one of the most concentrated regions of tidal energy in the world, with the upper-bound resource estimated at 5.1 GW. Owing to its significance, the AR is frequently used for model case studies of tidal energy conversion, and here we review these model applications and outcomes. We examine a range of temporal and spatial modelling scales, from regional models applied to resource assessment and characterization, to more detailed models that include energy extraction and array optimization. We also examine a range of physical processes that influence the tidal energy resource, including the role of waves and turbulence in tidal energy resource assessment and loadings on turbines. The review discusses model validation, and covers a range of numerical modelling approaches, from two-dimensional to three-dimensional tidal models, two-way coupled wave-tide models, Large Eddy Simulation (LES) models, and the application of optimization techniques. The review contains guidance on model approaches and sources of data that can be used for future studies of the AR, or translated to other tidal energy regions.
A second TIGER paper – ‘Turbulence characterization at a tidal energy site using large-eddy simulations: case of the Alderney Race’ – is featured the same journal.