基于室内PM2.5控制和节能的通风策略探讨

细颗粒物（PM2.5）随空调新风进入室内，和室内产生的PM2.5粒子一起作用，导致人体暴露在室内细颗粒物环境中。为保证室内空气品质，最大限度节约空调系统运行能耗，建立了室内PM2.5浓度与CO2体积分数双组分模型，提出了适用于某会议室不同室内外PM2.5源、不同人数以及不同天气状况下的最佳通风策略，利用Simulink对炎热天气室内有无PM2.5散发源、温和天气室内有无PM2.5散发源4种工况下的不同通风方式进行仿真对比。模拟结果表明：炎热天气存在最小新风量，该值由室内人数决定，过滤送风对控制室内PM2.5浓度效果最好；温和天气存在最大新风量，且该值与过滤器效率成正比；在所研究的情况下，温和天气节能潜力比炎热天气大。

Ventilation strategies based on PM2.5 and energy-saving

Outdoor haze particles (PM2.5) enter indoor environments with fresh air. Human beings can consequently be exposed to fine particles combined with other indoor PM2.5 sources. In order to maximize indoor air quality while minimizing energy consumption, a dual-component model involving indoor PM2.5 concentration and CO2 fraction was established in this study. Optimal ventilation strategies applied in meeting rooms were studied with various indoor-outdoor PM2.5 sources and persons, and under various weather conditions. Various strategies were modeled by a simulation system using indoor PM2.5 sources during hot and mild weather. The results showed that minimum outdoor air rate was determined by indoor human behavior during hot weather. In addition, filtering supply air can receive maximize air quality about controlling indoor PM2.5. Furthermore, maximum outdoor air rate was proportional to filter efficiency during mild weather. Therefore, potential energy saving during mild weather is larger than during hot weather.