Sea Technology

JUL 2015

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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www.sea-technology.com July 2015 / st 25 R elevant advances have been achieved in recent years on buoy- based lidar wind profle measure- ments. In most of them, data have been demonstrated to fulfll the key performance indicators (KPI) that the offshore wind farm industry requires. Those buoy-based lidar systems are expected to become a suitable alternative to met-tower measurements for site characterization before offshore wind farm construction and also for environmental monitoring once the wind farm becomes operational. Metmasts are as much as ten times more expensive than a foating lidar plat- form. They need a much longer installation time and are hardly reusable in other locations. A number of buoys hold- ing a lidar system to measure wind profles have been pro- posed, with a wide variety of shapes and sizes, ranging from relatively small discus buoys to large structures. On March 17, EOLOS Floating Lidar Solutions (Barcelo- na, Spain) deployed the buoy EOLOS in the RWE test site off IJmuiden, Netherlands, entering the fnal validation phase for this newly developed foating structure. The EOLOS buoy is a medium-size, autonomous platform that bases its novelty on a modular design, maximized power generation and storage capacity. The EOLOS Buoy EOLOS is the result of the three-year-long research project NEPTUNE, funded by KIC Innoenergy. As a result of NEPTUNE, EOLOS Floating Lidar Solutions introduced the buoy EOLOS into the market of offshore wind profle measurements. The concept, design and setup of the EO- LOS buoy was conducted in Barcelona by the Laboratori d'Enginyeria Marítima at the Universitat Politècnica de Catalunya (LIM/UPC). It consists of a modular four-foater structure covered by an octagonal fberglass hull that allows Novel Multipurpose Buoy for Offshore Wind Profle Measurements EOLOS Platform Faces Validation at IJmuiden Offshore Metmast By Joaquim Sospedra • Jordi Cateura • Joan Puigdefabregas Experimental setup in Badalona, Spain. The foating lidar is installed on the EOLOS proto- type (top left) and the fxed one on the tower (top right). Comparison of wind measure- ments showed a correlation index above 0.99 (bottom).

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