Poster: Investigation on the Effect of Density on Anemometer Calibration
27 Sep 17
4:45 PM
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5:45 PM
Tracks:
Poster Presentation
There has been an on-going discussion on the effect of air density variation on the calibration constants of anemometers. The direct implication of such research is to answer the question on whether the difference between density at the time of calibration and its deployment needs to be considered when calculating power production estimations. Since the power estimation accuracy is still not providing satisfactory results, density compensation may be an unaccounted source of error. This study investigates the effect of density on anemometer calibration and quantifies the variance attributed by humidity, barometric pressure, and temperature. Calibration data for the NRG 40C, NRG Class 1, and Thies First Class Advanced anemometers were analyzed from a large population of calibrations. Moreover, calibrations are analyzed over time to quantify seasonal effects. This research will determine whether it’s necessary to take the density effect into account when making wind power estimations.