建筑墙体表面传热系数辨识研究

System identification of wall surface heat transfer coefficient

对实验房间南向墙体内表面中心区域的换热过程进行实验 ,发现当风速在 0～ 5 .5m/s之间时 ,表面传热系数在 8～ 1 8W/(m2 ·K)之间波动 ,而风向对墙体表面传热系数影响不大 ;用辅助变量法分析墙体表面传热过程 ,并结合实验推导出墙体表面传热系数。模型的预测结果与实测结果吻合良好。

Makes experiments on heat transfer process i ns ide surface of the south wall of an experiment room. Finds that the surface heat transfer coefficient varies from 8 to 18 W/(m 2·K) with wind speeds rangi ng from 0 to 5.5 m/s, and the wind direction has a minor effect on the surface h eat transfer coefficient. Analyses the process of wall surface heat transfer coe fficient by means of an assisted variable method and deduces it from experiments . Calculation results well conform to the measured ones.