昆明南北朝向室内壁面热流量变化特征

Characteristics of heat flux on different internal surfaces of south and north houses in Kunming city

以昆明城市区域内建筑物作为研究对象,利用南北朝向室内壁面热流量实测资料,对各壁面的热流量进行了分析.得出:南北朝向房屋不同壁面热流量存在显著的时间和季节变化.12月室内壁面热流量变化受房屋朝向影响十分显著,而在4月和8月房屋朝向对室内壁面热流量传递影响较小.昼间南向室内4方位壁面热流量多为正值,热量从室内向壁面传递;夜间则反之;北向室内壁面热流量数值和传递方向随季节变化较大.考虑房屋壁面热流总量时,12月室内壁面热流总量的南北朝向呈现较大差异,而4月与8月,房屋朝向对室内壁面热流总量的影响较弱.

The microclimatic observations were conducted on different internal surfaces of building in the Kunming City, and surface heat fluxes were analyzed by using these data. The results indicate that heat fluxes have different temporal and seasonal variations for different internal surfaces of south and north houses. Different orientation has obvious influence on the variation of heat flux in December, but it nearly has no influence in April and August. For the south house, values of heat flux are positive in the daytime, which indicates heat transfers from indoors to internal surface, but they are negative in the evening. For the north house, values and directions of heat flux intensity vary notably with the change of season. Average total surface heat fluxes have marked differences between south and north house in December, but it nearly have no differences in April and August. The results can serve as a foundation for more research on building microclimate and rational design of urban architecture. The findings may also be a reference for study concerned in other regions.