The effect of a meteorological tower on its top-mounted anemometer
The wind-speed at a site can be measured by installing anemometers on top of meteorological (met) towers. In addition to other sources of error, accelerated airflow, or speed-up, around the top of met towers can cause incorrect anemometer measurements. We consider a particular example where an anemometer was located only 2 tower diameters above the met tower. Using a standard computational fluid-dynamics package, we found the maximum error for this configuration to be 2% of the wind-speed. We conclude that a top-mounted anemometer should be located at the windward side of its met tower, raised 5 diameters above the top. This will reduce speed-up error to less than 1%.
Year of publication: |
2007
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Authors: | Perrin, Dimitri ; McMahon, Niall ; Crane, Martin ; Ruskin, Heather J. ; Crane, Lawrence ; Hurley, Brian |
Published in: |
Applied Energy. - Elsevier, ISSN 0306-2619. - Vol. 84.2007, 4, p. 413-424
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Publisher: |
Elsevier |
Keywords: | Meteorological tower Flow distortion Anemometer Measurement error |
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