UKERC EDC: ETI

Citation	Pérez-Ortiz, A., Borthwick, A.G.L., McNaughton, J., Smith, H.C.M. and Xiao, Q. Resource characterization of sites in the vicinity of an island near a landmass, Renewable Energy, 103: 265-276, 2017. https://doi.org/10.1016/j.renene.2016.10.086. Cite this using DataCite
Author(s)	Pérez-Ortiz, A., Borthwick, A.G.L., McNaughton, J., Smith, H.C.M. and Xiao, Q.
Project partner(s)	University of Edinburgh, General Electric Renewable Energy, University of Exeter, University of Strathclyde
Publisher	Renewable Energy, 103: 265-276
DOI	https://doi.org/10.1016/j.renene.2016.10.086
Abstract	Renewable energy technologies are undergoing rapid development, the global aim being to achieve energy security and lower carbon emissions. Of marine renewable energy sources, tidal power has inherent predictability and large theoretical potential, estimated to exceed 8000 (TW h)a(-1) in coastal basins. Coastal sites in the vicinity of an island near a landmass are prime candidates for tidal stream power exploitation by arrays of turbines. This paper characterizes numerically the upper limit to power extraction of turbines installed at such sites. It is demonstrated that the maximum power extracted from the strait is generally not well approximated by either the power dissipated naturally at the seabed or the undisturbed kinetic power of flow in the strait. An analytical channel model (C. Garrett and P. Cummins, The power potential of tidal currents in channels, Proc. R. Soc. A Math. Phys. Eng. Sci., vol. 461, no. 2060, pp. 2563-2572, Aug. 2005) provides lower predictions than the present numerical model of available power in the strait due to the analytical model not accounting for changes to the driving head resulting from power extraction and flow diversion offshore of the island. For geometrically long islands extending parallel to the landmass, the numerically predicted extracted power is satisfactorily approximated by the power naturally dissipated at the seabed, and there is reasonable agreement with the estimate by the channel analytical model. It is found that the results are sensitive to choice of boundary conditions used for the coastlines, the eddy viscosity, and bed friction. Increased offshore depth and lower blockage both reduce the maximum power extracted from the strait. The results indicate that power extracted from the site can be maximum if extraction is implemented both in the strait and offshore of the island. Presence of the landmass and increasing island dimensions both enhance power extraction. Highlights Resource characterization of coastal sites defined as an island near a landmass. Undisturbed kinetic or dissipated power do not approximate maximum power extracted. Numerical results exceed those from an analytical model except for long islands. Increased offshore depth and lower blockage both reduce the maximum power extracted. Power extracted can be maximized with extraction in strait and offshore of island. This work was partly funded via IDCORE, the Industrial Doctorate Centre for Offshore Renewable Energy, which trains research engineerswhose work in conjunction with sponsoring companies aims to accelerate the deployment of offshore wind, wave and tidal-current technologies
Associated Project(s)	ETI-MA2003: Industrial Doctorate Centre for Offshore Renewable Energy (IDCORE)
Associated Dataset(s)	EDC0000134: Tidal Energy Site Environmental Conditions Measured During the ReDAPT Tidal Project 2011-2014
Associated Publication(s)	A model to map levelised cost of energy for wave energy projects An Integrated Data Management Approach for Offshore Wind Turbine Failure Root Cause Analysis An investigation of the effects of wind-induced inclination on floating wind turbine dynamics: heave plate excursion Application of an offshore wind farm layout optimization methodology at Middelgrunden wind farm Characterisation of current and turbulence in the FloWave Ocean Energy Research Facility Characterization of the tidal resource in Rathlin Sound Comparison of Offshore Wind Farm Layout Optimization Using a Genetic Algorithm and a Particle Swarm Optimizer Component reliability test approaches for marine renewable energy Constraints Implementation in the Application of Reinforcement Learning to the Reactive Control of a Point Absorber Control of a Realistic Wave Energy Converter Model Using Least-Squares Policy Iteration Cost Reduction to Encourage Commercialisation of Marine in the UK Cumulative impact assessment of tidal stream energy extraction in the Irish Sea Design diagrams for wavelength discrepancy in tank testing with inconsistently scaled intermediate water depth Development of a Condition Monitoring System for an Articulated Wave Energy Converter Dynamic mooring simulation with Code(-)Aster with application to a floating wind turbine Environmental interactions of tidal lagoons: A comparison of industry perspectives ETI Insights Report - Wave Energy Exploring Marine Energy Potential in the UK Using a Whole Systems Modelling Approach Hybrid, Multi-Megawatt HVDC Transformer Topology Comparison for Future Offshore Wind Farms Hydrodynamic analysis of a ducted, open centre tidal stream turbine using blade element momentum theory Offshore wind farm electrical cable layout optimization Offshore wind installation vessels - A comparative assessment for UK offshore rounds 1 and 2 Optimisation of Offshore Wind Farms Using a Genetic Algorithm Quantifying uncertainty in acoustic measurements of tidal flows using a “Virtual” Doppler Current Profiler Reactive control of a two-body point absorber using reinforcement learning Reactive control of a wave energy converter using artificial neural networks Re-creation of site-specific multi-directional waves with non-collinear current Reliability and O & M sensitivity analysis as a consequence of site specific characteristics for wave energy converters Reliability prediction for offshore renewable energy: Data driven insights Review and application of Rainflow residue processing techniques for accurate fatigue damage estimation Sensitivity analysis of offshore wind farm operation and maintenance cost and availability Simulating Extreme Directional Wave Conditions Testing Marine Renewable Energy Devices in an Advanced Multi-Directional Combined Wave-Current Environment Testing the robustness of optimal access vessel fleet selection for operation and maintenance of offshore wind farms The effects of wind-induced inclination on the dynamics ofsemi-submersible floating wind turbines in the time domain The Industrial Doctorate Centre for Offshore Renewable Energy(IDCORE) - Case Studies The power-capture of a nearshore, modular, flap-type wave energy converter in regular waves The SPAIR method: Isolating incident and reflected directional wave spectra in multidirectional wave basins UK offshore wind cost optimisation: top head mass (Presentation to All Energy, 10th May 2017)

Resource characterization of sites in the vicinity of an island near a landmass