夏热冬冷地区窗户遮阳系统的综合能效研究

Study on the Comprehensive Energy Efficiency of Different Shading Systems in Hot Summer and Cold Winter Area

为了比较夏热冬冷地区常见窗户遮阳系统的综合能效,本文以长沙地区典型住宅建筑为例,利用Energy Plus建立模型,对光伏遮阳以及蜂巢帘、固定遮阳篷、卷帘、水平百叶窗帘等传统遮阳系统进行综合能效研究。研究内容包括光伏遮阳系统在不同方位角和不同倾斜角下的净能耗,以及其它4种传统遮阳系统在不同品质和不同布置方式下的总能耗,最后对光伏遮阳系统与传统遮阳系统的节能效果进行了比较分析。研究结果表明:南向光伏遮阳系统最佳安装角度为30°,东西向光伏遮阳系统最佳安装角度在35°到45°之间;传统遮阳系统中,蜂巢帘和卷帘节能效果最好,相比于无遮阳条件可实现节能20%以上;此外,光伏遮阳系统相比于最优的传统遮阳系统至少可以节能30%。

The comprehensive energy performance of different shading systems in hot summer and cold winter area were compared by establishing models in Energy Plus. The comparison was conducted with photovoltaic shades,cellular shades,fixed awning,roller shades and horizontal venetian blinds installed in Changsha typical residential building. Firstly,the net energy consumption of photovoltaic shading system was analyzed with different azimuth and tilt angle. Then,the total energy consumption of other four kinds of common shading systems in different quality and different setting mode were compared. Finally,the building energy consumption between photovoltaic shading system and traditional shading systems were compared and the energy saving effect of different shading systems were analyzed. The results show that the suitable tilt angle for photovoltaic shading system is 30° in south,and range from 35° to 45° in east and west. The energy efficiency of the cellular shades and roller shades are highest among traditional shading systems,which can save 20% of energy compared to the non shaded conditions.whats more,photovoltaic shading system can save at least 30% of energy compared to the best traditional shading system.