基于汽热法风力机叶片除冰传热分析

HEAT TRANSFER ANALYSIS OF THE DE-ICING SYSTEM FOR WIND TURBINE BLADES BASED ON GAS THERMAL

基于气热法对风力机叶片除冰的传热计算进行分析,主要为给定空气加热器输出热量后,对除冰时间的传热分析进行计算。首先介绍了风力机叶片结冰的机理和气热法除冰的原理,然后进行传热过程中的对流换热以及导热的理论计算,从而得到了各个传热过程中的传热量,并且估算出最佳除冰温度下空气加热器的最小输出热量,最后通过仿真实例计算出理论上达到除冰要求时所需要的时间。对叶片进行传热分析可以评估除冰系统运行时的效率,提高除冰系统的经济性,同时也为工程传热计算提供依据。

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.