Alrick Building, Classroom 10
Friday, June 24, 2016 - 13:00 to 14:00
Presenter: Dr. Gregory Payne
Affiliation: Institue for Energy Systems, University of Edinburgh
Title: Testing results for extreme loads on tidal turbines
Extreme loading and associated survivability are key aspects of tidal turbines. Within the EPSRC funded X-MED project, extreme loads due to combine wave and current hydrodynamic loading are investigated.
This seminar starts by detailing the design process of the turbine model, with an emphasis on instrumentation. Results from tests carried out at the current and wave flume of IFREMER in the North of France are then presented.
The tidal device considered is a generic three bladed horizontal axis turbine. The scale of the model is approximately 1/15. The rotor is designed so that for a specific tip speed ratio (TSR) the thrust coefficient and the radial variation of thrust are similar to those of a full-scale prototype. The model was tested in flows with two different turbulence intensities (3 and 12%) and in a combination of flow and waves. Data presented include power and thrust curves and detailed analysis of the thrust load and how its spectrum relate to that of the onset flow. Rotor loads are also compared with individual blade loads and tower foundation loads.
Grégory Payne is a research engineer with more than 15 years’ marine renewable experience gained within academic and commercial sectors. He did is PhD at the Univeristy of Edinburgh under the supervision of Stephen Salter on the numerical modelling and experimental tank testing of the Sloped IPS buoy wave energy converter (WEC). He then worked for two years for the company Artemis Intelligent Power on the design and testing of a novel high efficiency hydraulic motor for the power take-off of marine energy converters in collaboration with Pelamis.
After that he worked for the University of Edinburgh as a research fellow within the SuperGen Marine consortium for five years. During that period, he was involved in several projects including: the development and testing of a novel laser based optical wave gauge, the development of a set of guidance for the experimental tank testing of WECs and the development of a real-time computer based control system for WEC models. He then went on to work for 8 months for the company Aquamarine Power as a wave resource analyst and also on the development of an underwater high speed camera to deliver flow visualisation around WEC models. For the last four years, he has been working as a research fellow for the University of Edinburgh on tidal energy projects.
In that context, he has carried out the mechanical design of a complete solution for the deployment of oceanographic instruments (ADCPs) in very high velocity currents and has configured these ADCPs for non-standard deployments. He has been responsible for the design, manufacturing, instrumentation and testing of a horizontal axis tidal turbine model to investigate extreme loads on tidal rotors. Over the years he has also carried out consultancy work for the UK Carbon Trust and for the companies
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