外窗遮阳系统太阳得热系数及其对空调负荷的影响

Study on solar heat gain coefficient and air conditioning load of external window shading systems

为研究外窗遮阳系统的太阳得热系数全年变化规律及外窗遮阳系统对空调负荷的影响,以南京市为例,对外窗遮阳系统的太阳得热系数在全年逐月的变化规律、3种外窗遮阳系统在不同朝向方位角上的年太阳得热系数及外窗遮阳系统对房间空调负荷的影响等进行了研究。结果表明:南向双玻中空外窗遮阳系统全年的月太阳得热系数相差最大达到0.10,且夏季太阳得热系数比冬季低13%;采用中置卷帘遮阳和外置水平百叶遮阳的外窗系统空调节能效果较好;此外,外窗遮阳系统的年太阳得热系数与空调全年累计负荷存在正相关关系,且采用中置卷帘和内置百叶遮阳的南向外窗,其全年累计负荷降低率大于采用相同遮阳形式的西向外窗。

In order to study the variation of solar heat gain coefficient(SHGC)in the whole year and the influence of the window shading system on the air conditioning load,taking Nanjing as an example,studies the change rule of SHGC of the window in 12 months of the year,the annual SHGC of three kinds of external window shading systems in different orientation angles,and the influence of window shading systems on the room air conditioning load.The research results show that the difference of monthly SHGC of the south facing window is up to 0.10,and the SHGC in summer is 13%lower than that in winter.The air conditioning energy saving effect of the external window system with central roller shutter and external horizontal shutter is better.In addition,the annual SHGC of the window shading system has a positive correlation with the total energy consumption of air conditioning,and the annual cumulative load reduction rate of the air conditioning of the south facing window with central roller shutter and built-in blinds is higher than that of the west facing window with the same sunshade.