严寒地区被动房外窗窗框比研究

External Window-frame Ratio of Passive House in Severe Cold Region

为提高被动房在严寒地区的适用性,针对被动房外围护结构主要耗能部件——外窗进行研究。利用数值计算方法,根据太阳得热系数(SHGC)计算方法以及现行标准的要求,分别计算出冬、夏两季被动房窗框比限值,研究了冬季最大窗框比和夏季最小窗框比,分析得出被动房最大窗框比是一个与太阳辐射吸收系数等相关系数有关的计算值,冬季的窗框比为有效值,而夏季为无效值,故在夏季需要辅助遮阳设施来达到被动房夏季设计要求。为被动房设计外窗选型提供参考依据。

In order to study the applicability of the Passive House in severe cold area,the external windows of the Passive House is analzyed,which is the main energy dissipation component in peripheral protective structure. According to the computational formula of Solar Heat G ain Coefficient（ SHG C） and the current standard,we get the window-frame ration in the winter and in the summer through the numerical calculation. The maximum window-frame ratio in winter and the minimum window-frame ratio in summer are studied. The window-frame ratio is a calculated value which is related to the correlation coefficient such as solar radiation absorption coefficient. The maximum window-frame ratio in winter is an effective value and the minimum window-frame ratio in summer is an invalid value,so the shading facilities need for the Passive House design in summer. The paper give a hand for choosing the external window of the Passive House.