应用萘升华法实测建筑外表面对流换热

建筑外表面对流换热系数（CHTC）是建筑节能和城市环境中的重要参数．提出利用萘升华热质比拟技术来研究建筑外表面对流换热系数的方法，并以单栋建筑水平外表面为研究对象进行了实测通过与涡旋相关法的实验结果进行比较，发现两种方法的结果趋势一致茶表面温度波动和不同传热温差对实测结果影响不大．同时，本文中还对萘升华法的精度进行了分析最后，利用实测数据得到建筑外表面对流换热系数预测式．分析和比较结果表明，萘升华是一种测量建筑外表面对流换热系数的有效方法．

Field Measurement of Convective Heat Transfer on External Surface of Building Using Naphthalene Sublimation Method

The convective heat transfer coefficient （CHTC）on external surface of building is the important parameter in building energy conservation and urban environment. A method using naphthalene sublimation technique for measuring CHTC was developed which was also applied in field measurement on the horizontal roof of a building. By means of comparison between naphthalene sublimation and eddy correlation, the results of both methods tend to be same. The results were not seriously affected by the variation of surface temperature of naphthalene and the temperature difference between roof surface and above air. The accuracy of this method was also analyzed. Finally,a correlation for calculating CHTC of external surface of building was obtained based on measurement data. The results show that the naphthalene sublimation is an effective method for measuring CHTC of external surface of building.