Quick Answer
To measure wind speed at a prospective site, you can use a handheld anemometer, a weather station, or a cup anemometer installed on a mast. The ideal height for wind speed measurement is between 10 to 30 meters above ground level. Regular measurements over several months are necessary to capture seasonal variations.
Choosing the Right Measurement Tool
When selecting a wind speed measurement tool, consider the accuracy, durability, and ease of use. Handheld anemometers are ideal for initial site assessments, while cup anemometers and weather stations provide more precise data. Install a cup anemometer on a mast at least 10 meters above any obstructions to ensure accurate measurements.
Understanding Wind Speed Measurement Parameters
Wind speed is typically measured in meters per second (m/s) or miles per hour (mph). For wind turbine siting, a minimum average wind speed of 5-7 m/s (11-16 mph) is recommended. To determine the suitability of a site, measure wind speed at different heights and directions over multiple months. This data will help identify any seasonal variations and potential turbulence.
Interpreting Wind Speed Data
When analyzing wind speed data, look for the following parameters: average wind speed, wind speed frequency distribution, and turbulence intensity. Average wind speed indicates the site’s overall wind resource. Wind speed frequency distribution shows the likelihood of different wind speeds at the site. Turbulence intensity indicates the likelihood of extreme wind speeds, which can impact turbine lifespan and performance.
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