Advancements in Marine Renewable Energy Technology: A Comprehensive Overview
Cutting-edge developments in marine renewables, particularly tidal energy, are showcased in this event report. The profile highlights the extensive experience of key figures in the field, detailing projects like Tandem Tidal Turbine and ADCP applications. The research dissemination on tidal turbine performance and resource assessment drives forward the understanding and optimization of tidal energy technologies.
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Technology Developments MRIA Forum Dublin 3rdFebruary 2017 Cuan Boake Dr Matt Folley
Profile Est. 2010 50 Years combined academic/industrial experience in marine renewables Wave/Tidal Energy Services Hydrodymamic Modelling Concept Evaluation Resource Monitoring & Characterisation Specialised instrumentation systems System Integration IEC TC114 (UK & ROI) Wave and Tidal Resource Tidal Power Performance Tidal Tank Testing Tide Pure Marine Gen Queen s University Belfast Resolute Marine RPS Schottel Six-West Tidal Energy Limited Thetis Tonn Energy UKAS UCD Wavegen WAVEPOWER Whale Energy
Tandem Tidal Turbine I, II, III CASE Funded April 2013 - July 2017 Testing 1/10 scale turbines in arrays in steady/tidal/tank flows Multiple instrument integration and turbine PID control
TTT Dissemination Jeffcoate, P., Salvatore, F., Boake, C. & Elsaesser, B. (2015). Effects of submergence on tidal turbine performance. EWTEC 2015 Jeffcoate, P., Starzmann, R., Elsaesser, B. & Scholl, S. (2015). Field Measurements of a Full Scale Tidal Turbine. International Journal of Marine Energy Jeffcoate, P., Whittaker, T. & Elsaesser, B. (2015). Field tests of multiple 1/10th scale tidal turbine devices in steady flows. Journal of Renewable Energy. Torrens-Spence, H., Jeffcoate, P., Schmitt, P. & Elsaesser, B. (2014). Testing Tidal Turbines Part 2: Tidal Flow Characterisation using ADV Data. ASRANet International Conference on Offshore Renewable Energy. Jeffcoate, P., Elsaesser, B., Whittaker, T. & Boake, C. (2014). Testing Tidal Turbines Part 1: Steady Towing Tests vs. Moored Tidal Tests. ASRANet International Conference on Offshore Renewable Energy. 1.6 ADCP1 ADCP2 1.4 Velocity [m/s] 1.2 1 0.8 0.6 0 20 40 60 80 100 120 140 160 180 120 Turbine 1 Turbine 2 100 80 Torque [Nm] 60 40 20 0 0 20 40 60 80 100 120 140 160 180 1000 Pelect1 Pelect2 Pmech1 Pmech2 800 Power [W] 600 400 200 0 0 20 40 60 80 100 120 140 160 180 Time [s]
ADCPs in Marine Energy WHY? Wave and Tidal Applications Numerical Model Correlation/Site Selection Resource Characterisation Harmonic Analysis Turbulence Device Optimisation Cp-Lamda Curve Device Characterisation Power/Speed Curve Annual Energy Production forecasting Fatigue Analysis Wave Current Interaction Environmental Impacts
Development Drivers IEC TS 62600-201: Tidal energy resource assessment and characterisation While there is a potentially significant influence on the AEP for an array of TEC devices due to turbulence inherent in the tidal flow, no corrections for the effect of turbulence should be performed in the reported assessment of AEP. Future efforts will be made to quantify this influence; however this is not covered at this stage of the TS development. Annex B Guidelines for Current Profiler Measurements: This Annex considers protocols and practices for current profiler measurements of mean velocity. These instruments are not, in general, sufficient for turbulence characterisation. Waves measurement at tidal site Existing tools and methods are limited Second generation ADPs available 5 beams Greater memory Interleaved pings
MOREDATAS Project funded by the OCEANERA-NET Joint Call 2014 Nov. 2015 to Dec. 2017
Related projects TIME Define a unified framework for measuring, classifying and predicting the effect of turbulence on resource assessment, device design/operation and array yield ReDAPT Single Beam, Divergent and Convergent ADPs Turbulence and wave-current interaction characterisation AESTUS ADPs, separation of wave and turbulence FLOWTURB Improved description of turbulent length scales Reynolds stress derivation from >4 beam instruments THYMOTE Alderney Race (Raz Blanchard) ADP, Tank tests, LES modelling based on the LBM approach
Plan Historical and synthetic datasets Budget of uncertainties Advanced method of measurements New measurement campaigns Development of advanced analysis techniques Turbulence characterisation using 5 or 8 beam ADP setup Measurement of waves using a set of pings dedicated to surface tracking Separation of the wave orbital velocities and turbulence velocity fluctuations Characterisation of the turbulence and the wave resource for the range of sites Dissemination of project outcomes Vermeulen et al 2011 Filipot et al 2015
Survey sites Partner ECN TEL DP Energy Site SEMREV Ramsey Sound Fair Head Location Le Croisic, France Pembrokeshire Wales Antrim, Northern Ireland Type Wave and offshore wind test site Demonstration tidal turbine Demonstration tidal farm Depth 35 m 30 m 35-50 m Current velocity ~1 m/s ~4 m/s ~4m/s
Progress 85 80 Error in estimated std wave direction (deg) 75 70 65 60 55 amplitude perturbation = 0 amplitude perturbation = 0.025 amplitude perturbation = 0.05 amplitude perturbation = 0.075 amplitude perturbation = 0.1 50 45 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Non-dimensional seperation
