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以上海地区典型办公建筑为例,分析了换气次数、室内热源、通风温差控制模式、楼层及朝向对夜间通风降温节能效果的影响。结果显示,保证5～10h-1换气次数的有效夜间通风,可以实现较好的降温冷却效果;夜间通风能够显著地减小室内热源对空调开机负荷的影响,可以基本消除夜间室内15～25W/m2的内部热扰量;根据室内外温差进行通风控制,可以在室内热源发热量较小的情况下提高节能效果;房间负荷越大,通风节能效果越好。
Taking a typical office building in Shanghai as an example, the influence of ventilation times, indoor heat sources, ventilation temperature difference control mode, floor and orientation on the energy saving effect of night ventilation and cooling is analyzed. The results show that the effective night ventilation with 5 ~ 10h-1 air exchange rate can achieve better cooling effect; night ventilation can significantly reduce the impact of indoor heat source on the air conditioning startup load, which can basically eliminate nighttime indoor 15 ~ 25W / m2 The amount of internal heat disturbance; According to indoor and outdoor temperature difference ventilation control, you can heat less in the indoor heat source to improve energy efficiency; the greater the room load, the better ventilation and energy saving.