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采用EnergyPlus软件对哈尔滨地区典型办公建筑在常规空调系统运行模式与夜间机械通风系统运行模式下的室内热环境和能耗进行了模拟。结果表明,在哈尔滨地区,白天室外最高温度高于24℃时都适合进行夜间机械通风,一共约60d,占空调运行期的72.3%;整个夏季空调运行期内,采用夜间机械通风系统该办公建筑节电量指标为1.15kWh/(m2.a),节省运行费用指标为1.02元/(m2.a);在人工制冷阶段,夜间机械通风模式下的室内热环境明显优于常规空调模式,且房间体积与表面积比越小,越有利于提高室内环境的热舒适性;当室内空气设计温度较高时,室内温度下降大,延迟人工制冷开启时间长,但是节能量未必比室内设计温度较低时高。
EnergyPlus software was used to simulate the indoor thermal environment and energy consumption of typical office buildings in Harbin in the mode of operation of conventional air-conditioners and that of nighttime mechanical ventilation systems. The results showed that nighttime mechanical ventilation was suitable for daytime outdoor maximum temperature above 24 ℃ during the daytime in Harbin for a total of about 60 days, accounting for 72.3% of the air-conditioning operation period. The nighttime mechanical ventilation system was used throughout the summer air-conditioning operation period. The power saving index is 1.15kWh / (m2.a), and the running cost index is 1.02 yuan / (m2 · a). In the artificial refrigeration stage, the indoor thermal environment under nighttime mechanical ventilation mode is obviously superior to the conventional air conditioning mode, and the room The smaller the volume to surface area ratio, the better the thermal comfort of the indoor environment. When the indoor air temperature is high, the indoor temperature drops and the delay of manual refrigeration is long, but the energy saving may not be lower than the interior design temperature high.