南京地区飘窗侧面与墙体夹角对空调能耗的影响

The Influence of the Angle between Bay Window Flank and Wall on Energy Consumption in Nanjing

本文以南京地区典型年逐时气象参数为基础,利用EXCEL计算南墙PVC平开中空飘窗和铝塑Low-E中空飘窗在飘窗侧面与墙体夹角从30°～90°变化时的能耗情况。结果表明:南墙飘窗的全年能耗随着夹角的减小而减少,综合飘窗自身特性,飘窗夹角的最佳角度应在60°左右;当飘窗侧面与墙体的夹角为60°时,在夏天可以得到较少的太阳辐射得热,在冬天可以得到较多的太阳辐射得热,从而整体上减小了全年的能耗;夹角为60°的PVC平开中空飘窗和Low-e中空飘窗的全年能耗比夹角为90°时分别要小7.5%和4.6%,与传统的铝合金推拉平面窗相比,二者的全年能耗也分别要小5.8%和2.2%。

According to the hourly typical meteorological data in Nanjing. EXCEL was used to analyze the dynamical heating and cooling load of the south casement bay window, one of which is made of PVC forms and double-glazing system, and the other is made of Low-e forms and double-glazing system, and whose angle between the flank of bay window and the wall is from 30° to 90°. The result shows that the annual energy consumption of south bay window will be decreased with the angle＇s decreasing, and considering the characteristic of bay window the best degree of angle should be about 60°. When the angle is 60° the south bay window could get less solar radiation gain in summer and get more in winter, so as to decrease the annual energy consumption. With 60° angle, the annual energy consumption of window made of PVC forms and double-glazing system, less 7.5% than that of 90° angle, and for the window made of Low-e forms and double-glazing system, it would be less 4.6%. When compared with the traditional aluminum sliding casement window, the annual energy consumption of the two would less 5.8% and 2.2% respectively.