极端热环境下被动式遮阳墙体设计与节能特性研究

Research on Design and Energy Saving Properties of Passive Visor Wall in Extreme Hot Environment

为了降低空调能耗在建筑能耗中所占的比例,提出了一种基于太阳高度角的被动式遮阳墙体的设计方法,在太阳高度角较大时规避太阳辐射,在高度角较小时利用太阳辐射。以南京地区某住宅为例,采用EnergyPlus软件对建筑全年负荷进行了动态模拟,分析了被动式遮阳墙体节能效果的影响因素。研究结果表明,被动式遮阳墙体能根据太阳高度角调节各个配件的尺寸,同时,采用被动式遮阳墙体的建筑比参照建筑降低了18.82%的建筑冷负荷,节能效果显著。

In order to reduce the proportion of energy consumed by air conditioning system in building energy consumption,a method of a passive sunshade wall based on the solar elevation is proposed to avoid solar direct radiation when the solar elevation is higher,and to absorb the solar radiation when the sun elevation is lower.Taking a house in Nanjing as an example,the EnergyPlus software is used to simulate the building energy consumption,as well as the influence of the visor configuration on the building energy saving.The simulation results show that the passive sunshade wall can adjust the size of each accessory according to the solar elevation.Meantime,it can reduce the building cooling load by 18.82%compared with the reference building,and the energy saving effect is remarkable.