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提前开启通风或空调系统可保证室内空气品质或温度在人员进入室内时达到可接受的水平。基于污染源可及性和数值模拟,分别研究了等温和非等温通风条件下污染物浓度分布达到稳定所需的时间与提前开启时间。结果显示:在等温通风条件下,当换气次数为1h-1时,8种典型通风方式下污染源可及性达到稳定的时间为6~16h;在非等温通风条件下,空调系统提前开启时间可由污染物浓度分布达到稳定的时间来决定;而在较高的换气次数(≥4h-1)下,空调环境室内平均温度和呼吸区挥发性有机物(VOC)平均浓度达到稳定所需的时间接近,为1~3h,为控制污染物浓度分布设计的空调通风系统提前开启时间仍可根据为加热或冷却房间空气温度设计的提前开启时间来确定。
Opening the ventilation or air conditioning system in advance ensures that indoor air quality or temperature is acceptable to occupants as they enter the room. Based on the pollution source availability and numerical simulation, the time and the early turn-on time of pollutant concentration distribution in isothermal and non-isothermal ventilation were studied respectively. The results show that under the condition of isothermal ventilation, when the number of ventilation is 1h-1, the time of pollution source accessibility under the eight kinds of typical ventilation modes is 6 ~ 16h; under the conditions of non-isothermal ventilation, the air-conditioning system starts ahead of time Which can be determined by the time it takes for the pollutant concentration to reach a steady state. However, at higher ventilation times (≥ 4h-1), the indoor average temperature and the average concentration of volatile organic compounds (VOCs) in the respiratory area reach the required time for stabilization Close to 1 ~ 3h, the air conditioning and ventilation system designed to control the pollutant concentration distribution can be determined according to the pre-opening time designed for heating or cooling the room air temperature.