Abstract: Based on the gas thermal method, heat transfer calculation of the de-icing system for wind turbine blades is analyzed in this paper. First, the formation mechanism of blade icing is introduced. At same time, the principle of gas thermal de-icing system is presented. Second, the convective heat transfer and thermal conductivity are calculated. Then, the heat transfer in the heat transfer process and the minimum heat output of air heaters under optimal de-icing temperature are obtained. Finally, the time required for de-icing effect was obtained by a simulation example.

Key words: wind turbine blade, gas thermal method, de-icing system, heat transfer