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Tidal turbines are typically conservatively designedleading to additional, associated, expense. Overdesignis commonly driven by alimited understandingof the conditions at the deployment site. The RealTideproject aims to tackle this conservative design byproducingan open-access database of field and experimentaldata, providing a fuller understanding of the spatial andtemporal variation of these conditions and the interactionof real-world conditions with the turbine. Under thisproject, high resolution AcousticDoppler Current Profilers(ADCPs) have been deployed in the Fromveur passage(France) alongside the Sabella D10 tidaldevice. Wheninterpreted using a high resolution three-dimensionalTELEMAC model of the tidal environment, a number ofboth typical operational and energetic conditions have beenidentified. These results show that the influence of wavessubjects evenbottom mounted turbines to large variationin velocity. Tests in FloWave have been conducted underrepresentative conditionsthat combine multi-directionalwaves with noncolinear currents. A highly controllable,three-bladed, model turbine has been tested under theseconditions, with device power and force measurements.The RealTide database has been populated with informationabout the real world and experimental conditions andthe response of and loads experienced by the turbine. Thisdataprovides a set of information that may be applied tothe design of real-world devices deployed in the ocean. Thedevicedata is complemented by a set of, spatially dense,acoustic Doppler velocimeter measurements characterisingthe model turbine’s inflow, near field, and wake. Particularattention is paid to ensuring the resulting open-accessdatabase is correctly qualityassured and practical to access,providing maximum benefit for academic and industrialusers alike. |
