[M-AG32] Renewable Energy

[MAG32-P02] Wind Tunnel Experience for Evaluating snow accretion and icing on and cup anemometer

Saki Tsuboi¹, *Fumichika Uno¹, Mizuki Konagaya², Toshinari Mito², Kazuomi Yahagi³, Takuya Sonoda³, Hiroki Motoyoshi⁴, Kengo Sato⁴ (1.Nihon University, College of Humanities and Sciences, 2.Rera Tech Inc., 3.Eurus Energy Holdings Corporation, 4.National Resereach Institude for Earth Scinece and Disaster Resilience)

Keywords:Wind measurement, Wind Farm, Icing, Cup anemometer, Met masts

To select a suitable wind farm site, we need to observe wind conditions for one year. However, there is a lack of data from met masts in cold areas of Japan due to icing and snow accumulation on the instrument.
Therefore, we investigated the weather condition of icing on anemometers and conducted wind tunnel experiments to reproduce these conditions and assess their impact.
Several icing events occurred during cyclones containing supercooled clouds. Among these, icing events associated with cyclones that caused anemometer failure lasted longer than others.To further investigate these conditions, we conducted a wind tunnel experiment to reproduce icing during cyclonic events. The results of the experiment showed that the ice only adhered to the cups of the heated anemometers. As the ice accumulation on the cups increased, the measured wind speed decreased at a rate of 2.1% per gram of ice.
This experiment did not reach the stopping of the anemometers due to the insufficient duration of the experiment. In future studies, we will carry out the long-term experiments and evaluate the decreasing rate on outdoor met masts.