南京地区东向和西向外遮阳方式研究

Study of external shading on east-facing and west-facing windows in Nanjing

以南京地区的东西向窗户为对象,以全年太阳有效直射辐射为衡量指标,对水平遮阳和垂直遮阳方式进行了研究。结果表明,综合考虑夏季遮阳和冬季得热的要求,东向和西向均建议采用水平遮阳方式。东向推荐构件尺寸取值：遮阳板挑出长度W=0.7 m,距窗户上沿的高度H′=0~0.2 m,遮阳板延长长度L′=0.1 m。西向水平遮阳效果要好于东向,在条件允许下,可尽量增加遮阳板挑出长度W,H′=0~0.3 m,L′=0 m。垂直遮阳由于效果不明显,不推荐采用。

East-facing and west-facing windows in Nanjing were regarded as research objects,and annual availability heat-gain from the solar direct radiation have been selected for evaluating,horizontal shading and vertical shading have been studied.The results showed that,on the basis of different requirements for solar heat-gain in winter and in summer,horizontal shading was recommended for east-facing and west-facing windows in Nanjing.The device dimensions for east-facing windows：the width of shading device should be 0.7 m,the distance between shading device and upside of windows should be 0~0.2 m and extended length should be 0.1 m.Horizontal shading effects of west-facing are better than east-facing,the width of shading device can be increased as much as possible under the appropriate condition,H′=0~0.3 m,L′=0 m.Vertical shading was not recommended without enough obvious effects.