Physical Processes, Modelling and Measuring of Icing Effects in Europe

Wien

2005

71 S.

Bandaufführung

125858

In this study general information about the icing conditions at the investigated test site near a wind turbine in the region of Oberstrahlbach, Austria, are given and an inventory of icing model results is presented. In addition, an overview of the physical processes involved in icing is compiled. Some estimations of the accreted ice mass based on the described models, such as for freezing rain and in-cloud icing with the measured meteorological parameters are presented. These measurements involved experimental data for the winters 2002/03 and 2003/04 at several levels on a meteorological mast together with pictures from web cams to collect information from which icing and visibility could be directly assessed. The results show that some icing models can be used with good success. However the available on-site measured meteorological data are not sufficient for a detailed modelling of the icing process, which would require input information about the droplet size distribution, and the liquid water content. These properties can only be partly derived from the investigated models and algorithms.