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Laser beam advantages -- Wind monitoring (2)

Lidar, a new technology for measuring wind strengths, comes into its own when assessing the available energy resource at locations where wind direction will vary with height across the rotor diameter of the turbine, reports Peter Clive of British company Sgurr Energy. It provides far more accurate assessments than when using conventional anemometry, he contends.

Lidar is an acronym for "light detection and ranging" and uses a laser beam that is directed into the airflow that is to be measured. The light reflected by microscopic airborne particles is then analysed and enables accurate assessments of wind profiles to be made. Wind velocity and turbulence can both be measured and the system is compact, ground-based and easily deployed, says Clive. He presented his findings at the tenth World Renewable Energy Congress and Exhibition held in Glasgow, Scotland, in late July.

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