南窗在建筑中的节能效益

Saving Energy Benefits of Southern Window in the Building

基于云南7个城市现有典型的太阳辐射资源,建立了计算模型.通过对建筑室内温度的模拟计算和分析,研究了太阳辐射对建筑南向有大面积单层玻璃窗的房间室内热环境的影响.结果表明:低纬度地区(21°～23°N),4～9月份气温较高,建筑大面积南窗接收太阳辐射会引起室内过热,应作适当遮阳处理或缩小南窗面积.云南大部分地区(23°～29°N)建筑南立面大面积开窗非常有利于室内温度的提升,尤其是冬半年,可达6℃～7℃,且夏半年室内无过热现象.建筑南立面开大面积窗户对减少建筑能耗、节约能源、改善大气质量具有重要意义.

Based on typical solar irradiance resource of 7 cities in Yunnan, the temperatures of a room with a southern window in a building are calculated and analyzed in this paper with a computational model. The influence of solar irradiance through the southern single glass window with large area in the building on the room temperatures is discussed too. The results show that the room will be overheated by solar energy through the southern window in the building in low latitude （21°- 23°N） in Yunnan, because of much higher ambient temperature from April to September. The adumbral measures in the window or reducing of its area should be taken in order to keep the room from overheating. The useful temperature upgrades of the room will increase greatly in a majority of regions （23°- 29°N）, due to solar irradiance energy through the window, and the temperature upgrade reaches about 6℃ - 7℃ in hiemal half year. The rising of temperature in the room is small in the aestival half year and the overheating of the room will not be occurred. The southern single glass window with large area of the building is greatly meaningful for energy reduction in building, energy saving, and environmental improvement.