夏热冬冷地区居住建筑过热分析

Analysis of Overheating in Residential Buildingin Hot Summer and Cold Winter Area

为研究夏热冬冷地区居住建筑的过热状况,以武汉为例,利用EnergyPlus对全年逐时操作温度进行计算,结合室内过热理论,计算并分析建筑过热状况。同时,对室内过热与外墙传热系数的关系进行数值分析。结果显示,在无主动制冷条件下,模型建筑室内过热率很高,过热对室内不舒适率的贡献度很高,盲目减小传热系数会提高过热风险;对于武汉地区非空调居住建筑,南向墙体传热系数推荐范围值为0.42~0.48 W/(m^2·K),北向墙体传热系数推荐范围值为0.32~0.40 W/(m^2·K),墙体通用传热系数推荐范围值为0.36~0.44 W/(m^2·K)。

With attention on the residential building indoor overheating conditions and external wall heat transfer coefficient.As an example of Wuhan typical residence,the whole year operative temperatures were calculated with Energy Plus,then the overheating conditions were calculated and analyzed combined with indoor overheating theory.The results show that,without active cooling of residential building in Wuhan,the value of overheating rate is of great size,and the rate of discomfort caused by overheating is considerable;Lower heat transfer coefficient of the external wall means more overheating risks;For residential buildings in Wuhan without active cooling,the k-value of Southward wall is supposed to be 0.42~0.48W/(m2·K),the k-value of Northward wall is supposed to be 0.32~0.40W/(m2·K),the k-value of general wall is supposed to be 0.36~0.44W/(m2·K).