Tidal Energy Deltares expertise Arnout Bijlsma en Luca van Duren 5 - PowerPoint PPT Presentation

Tidal Energy – Deltares expertise Arnout Bijlsma en Luca van Duren 5 August 2015

Deltares Independent institute for applied research in the field of water, subsurface and infrastructure Deltares - Pro-Tide workshop 5 August 2015 2

Deltares – Pro-Tide workshop 1. Which developments, projects and/or activities regarding tidal energy take place in your country? • Pilot Bluetec Marsdiep – floating platform (Bluewater,Tocardo) • Pilot Tidal Turbines Oosterschelde Barrier (Tocardo, OTP) • Pilot Tidal Turbines Afsluitdijk (Tocardo) • Development Brouwersdam (projectbureau GCBD, Pro-Tide) • Swansea Bay Tidal Lagoon (TLP) 2. Which expertise is needed/requested in order to realize these ? • Hydrodynamic modelling (2D/3D HD, CFD, Physical Model Testing) • Operational optimization tools • Environmental effect assessment tools 3. What is the specific expertise of your institution? • R&D, development of tools • Specialist consultancy • All water & sub soil related issues Deltares - Pro-Tide workshop 5 August 2015 3

FLUID DYNAMICS POWER PRODUCTION

Tidal turbines Near-field hydrodynamics  CFD model of tidal turbines and detailed infrastructure (Energising delta’s concept) Validation • Single turbine in CFD matches well with Blade Element Momentum (BEM) computations of Tocardo • Barrier in CFD vs current measurements & water levels Oosterschelde (2011) • Barrier + turbines: new measurements in 2015+  Effect of turbines on flow through barrier or sluice gate, and reverse Coupling with far-field hydrodynamic models Application  Optimization of power production, minimization environmental effects  Input for turbine design tools (flow velocity, velocity gradients, turbulence, waves) Deltares - Pro-Tide workshop 5 August 2015 5

Roompot #08 Deltares - Pro-Tide workshop 5 August 2015 6

Swansea Bay Tidal lagoon 320 MW tidal lagoon • optimization of power production • minimization environmental effects Hydrodynamic modelling • Bristol Channel • Swansea Bay CFD • Turbines & sluices Physical Model Testing • Turbines & sluices Deltares - Pro-Tide workshop 5 August 2015 7

MINIMISING ENVIRONMENTAL IMPACTS

Environmental impacts  Sustainable  Low carbon emissions  Any structure in the environment will have some impact  These need to be known to  Obtain permits for operation  Demonstrate environmental friendliness Deltares - Pro-Tide workshop 5 August 2015 9

Stress factors, near field – far field Presence • Static effects • Dynamic effects • Chemical effect • Acoustic effects • Electromagnetic effects Energy reduction in the environment Cumulative effects Note:  Near-field effects (collision of fish or seals with rotor blades) have large public impact.  Far-field effects are less obvious but have far greater consequences Deltares - Pro-Tide workshop 5 August 2015 10

Small-scale coupled to large-scale Oosterschelde example  D3D-ecosystem scale models  Can be coupled to Individual Based Modelling (fish behaviour)  Large-scale ecosystem circulation relevant for ecosystem functioning (residence times, carrying capacity, transport)  Boundary conditions for CFD models Deltares - Pro-Tide workshop 5 August 2015 11

Model instruments Deltares - Pro-Tide workshop 5 August 2015 12

QUESTIONS?