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根据典型气象年数据分析了适宜贵州3个地区的夜间通风时段,应用EnergyPlus软件模拟了外保温外墙的内外壁面温度,通过Matlab编程计算了墙体的节点温度,分析了室外气温周期性变化边界条件下墙体逐时热流密度和逐时蓄热量的变化规律。结果显示:毕节、贵阳、遵义地区的凉爽通风时段分别为17:00至次日10:00,20:00至次日09:00,22:00至次日08:00;在22:00至次日01:00期间,由于外保温层的隔热作用及墙体对温度波的延迟作用,外墙内侧水泥砂浆仍会向室内散热,增大房间的冷负荷。
Based on the typical meteorological years data, the nighttime ventilation period suitable for three areas in Guizhou was analyzed. The temperature inside and outside walls of the external thermal insulation wall were simulated by EnergyPlus software. The temperature of the wall was calculated by Matlab programming. The cyclical variation of outdoor temperature The time-dependent heat flux density and the time-dependent heat storage capacity of the wall were studied. The results showed that the cool and ventilated periods in Bijie, Guiyang and Zunyi regions were from 17:00 to 10:00 on the next day, from 20:00 on the next day until 09:00 and from 22:00 on the next day until 08:00 on the next day, respectively. From 22:00 to The next day at 01:00, due to the insulation effect of the outer insulation and the delay effect of the wall on the temperature wave, the inner side of the outer wall of cement mortar will still heat to the room, increasing the cooling load of the room.