Sea Technology

FEB 2014

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

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Page 43 of 99

44 st / February 2014 WindSentinel Trial Deployment In 2009, AXYS ran a proof-of-concept trial at Race Rocks on the coast of British Columbia. One Vindicator was posi- tioned on an island, the other mounted on the NOMAD hull offshore. The sensors were 700 meters apart. In reviewing the results, GL Garrad Hassan stated in a 2011 paper for the European Wind Energy Association that the buoy mean wind speed agreed within 2 percent of the reference lidar measurements. This deployment was the world's frst validation of a foating lidar system, and it confrmed the effectiveness of the motion compensation feature. Based on the results of Lidar requires a signifcant power supply, typically around 100 to 120 watts in standard operation and up to 400 watts in extreme cold. The Wind- Sentinel power supply has been specif- cally engineered to support long-term remote deployments of up to a year at this level, with minimal service trips. Sealed lead acid rechargeable batter- ies power the WindSentinel. These bat- teries are charged by a wind generator and two 210-watt solar panels backed up by a high-effciency diesel generator for times of extended lulls in the wind. In this confguration, the WindSentinel can support the typical system power draw of 135 watts and, in extremes, can support up to 500 watts. With this ca- pacity, the WindSentinel is capable of meeting its goal of long-term remote deployments. The third component is the WatchMan500. With this in- novative technology aboard, each system has an intelligent, confgurable sensor I/O platform with two-way communica- tion and diagnostics and an intuitive menu-driven program. The ultralow-power modular design allows for future system expansion, and the support for all major telemetries means that the system can be managed remotely from anywhere. Onboard data logging and storage of 8 gigabytes can be ex- tended up to 16 gigabytes. The WatchMan500 allows clients to manage the system remotely and retrieve data in near real time, supporting extended remote deployments. The WindSentinel buoy deployed off Atlantic City by Fishermen's Energy. Scientifc Data Buoy Plymouth Marine Laboratory (PML) invites interested parties to tender for the provision of a scientifc data buoy. The platform, which will be permanently moored at a long-term monitoring and marine biodiversity reference site, must include the: • Ability to raise and lower oceanographic sensors intelligently through the water column; • Infrastructure expansion for additional technological enhancements; • Ability to withstand the often hostile environment of the western English Channel. Invitation to tender @PlymouthMarine Feb2014.indd 44 2/11/14 1:57 PM

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