广州某典型办公楼垂直百叶遮阳的综合节能分析

Analysis on Integrated Energy Efficiency for Vertical Sun-shading Blind of a Typical Office Building in Guangzhou

在夏热冬暖地区,降低窗和玻璃幕墙的外遮阳系数是降低空调能耗的有效方法之一,然而降低窗的外遮阳系数的同时也减少了对自然光的利用,从而增加了照明能耗。因此,需要对空调能耗和照明能耗进行权衡判断。本文对某办公楼的全年空调能耗和照明能耗进行了模拟,以建筑全年空调能耗和照明能耗的总和为控制指标,对建筑垂直外百叶遮阳结构(百叶出挑长度、百叶数和百叶倾角)进行了优化设计分析。结果表明,增加百叶出挑长度或增加百叶数,空调耗电量降低,照明耗电量增大,总能耗降低。但是,改变百叶偏角,空调和照明的总耗电量先是增大,而后减少,当百叶偏角为-15°时,总耗电量出现最大值。

In hot summer and warm winter area, decreasing the shading coefficient of the glazing system is one of the most effective methods to reduce the cooling energy consumption. However, it will lead to the less use of the daylight, and the electric lighting energy consumption will be increased. Therefore, a balance adjustment between the energy consumptions of cooling and electric lighting should be carried out. In this paper, energy consumptions of cooling and electric lighting were simulated by taking the total energy consumption as the control index. Furthermore, optimization design for the structure of vertical sun-shading blinds, including extend length, number and slip angle, was preformed. The results indicated that the increase of the extend length or the number of blinds would lead to the decrease of the cooling energy consumption, while the electric lighting energy consumption would be increased, and the total one would be reduced as an overall effect. On the other hand, when the slip angle was changed, the total energy consumption would be firstly increased and then decreased. When the slip angle was minus 15°, the total energy consumption had the peak value.