2 MW风机叶片气热法防除冰的传热试验研究

在凝冻地区风电场采用气热法进行风机叶片防除冰工程应用时,叶片传热试验至关重要。文章针对现场2 MW风机叶片,结合叶片重点结冰区域分布,设计研发叶片传热试验系统并实施9 h传热试验。试验采用12支温度传感器和红外热成像技术监测记录叶片温度,并分析叶片传热过程及传热效果。传热试验结果表明,在叶片前缘通道内施加30 kW加热器持续加热叶片本体,无日照时叶片前缘外表面15 m处温度为39.4℃,40 m处温度为25.3℃,温升在10℃以上,且分别沿叶尖和后缘两侧方向呈现递减分布。验证了利用气热法对该复合材料叶片进行防除冰,在理论上和技术上是可行的。

Heat transfer test research on air heating antiicing/deicing of 2 MW wind turbine blades

In freezing areas,the blade heating transfer test is the first and most important when the air heating method is applied to the antiicing/deicing engineering of the wind turbine composite.For the field 2 MW composite material blade,a heat transfer test system were to designed and developed to satisfy the distribution of the key icing area on this blade,and a 9 h heat transfer test was carried on site.Twelve temperature sensors and the infrared thermal imaging technology monitored and recorded the blade temperature,and the heat transfer process and its effect were analyzed.This heat transfer test results show that if blade body is heated continuously by 30 kW heater in the front passage of the blade and there is no sunshine,the temperature of the outer surface of the blade front edge is 39.4℃at 15 m and 25.3℃at 40 m,and the temperature rises above 10℃,therefore it is theoretically and technically feasible to apply air heating method to carrying out the antiicing/deicing technology on composite blades of 2 MW wind turbine.