A renewable energy risk analysis released a wind performance map for the second quarter of 2011. The map illustrates wind speeds above seasonal averages for most of the continental U.S. 3TIER’s second quarter map indicates departures from long-term mean wind speeds that range from -20 to 20% and provides an indication of how wind projects…
Heated anemometer works in freezing weather
Cup anemometers can generate inaccurate wind-speed values in gusty periods, and should one freeze, its turbine may have to shut down. One solution is an ultrasonic anemometer, like the Ventus UMB 8371 with a 240W heater. This unit provides precise and maintenance-free measurements of wind velocity and direction. Ventus belongs to Lufft’s WS family…
Its official: NREL says sodar data as good as from met towers
Sodar or sonic detection and ranging, is a relatively recent tool for measuring wind speed and direction up to 200-m up. The task was usually relegated to meteorological tower that had to be built and often reached only 80-m up. Portable sodar units simplify the task. Recently, as part of continuing scientific research to understand…