日较差对居住建筑夜间通风室内热环境的影响

为了研究不同日较差情况下,夜间通风对室内热环境的影响,采用Energyplus软件对西安地区某公寓室内空气温度、平均辐射温度进行了模拟研究。结果表明,与无夜间通风相比,夜间通风时室内最高气温、最高平均辐射温度分别降低了0.32℃、0.34℃。室内空气温度、平均辐射温度随日较差的增大而降低,且机械通风时段比渗透通风时段降低显著。当日较差为4℃、6℃、8℃、10℃、12℃时,室内处于热舒适时段的比例分别为0,16.11%,28.06%,32.01%和34.86%。

The Effect of Daily Range on the Indoor Thermal Environment of Residential Buildings during Night Ventilation

In order to study the influence of night ventilation on indoor thermal environment under different daily ranges, the Energy plus software was used to simulate the indoor air temperature and mean radiant temperature of an apartment in Xi’an. The results show that compared with no night ventilation, the indoor maximum air temperature and the highest mean radiant temperature are reduced by 0.32 ℃and 0.34 ℃ respectively during night ventilation;the indoor air temperature and mean radiant temperature decrease with the increase of daily range, and the indoor temperature during mechanical ventilation period is significantly lower than that during the infiltration ventilation period;when the daily ranges are 4 ℃, 6 ℃, 8 ℃, 10 ℃, and 12℃, the proportions of indoor thermal comfort periods are 0, 16.11%,28.06%, 32.01%, and 34.86%, respectively.