颗粒物对围护结构的穿透系数与换气次数关系的探讨
Correlation study on air change rate and particle penetration coefficient through building envelope
摘要：
室外颗粒污染物可以通过建筑围护结构缝隙进入室内，并对室内空气品质产生影响。通常用穿透系数来表征室外颗粒污染物穿过建筑围护结构进入室内的通过性。考虑到建筑围护结构在室内外空气交换流通和室外颗粒物进入室内的过程中所起到的关键作用，建立了室外颗粒物对围护结构的穿透系数与换气次数的关联性模型。分析、阐述了换气次数对颗粒物穿透系数的影响。通过模拟工况的数值计算，讨论了在研究室外环境对室内颗粒污染物浓度的影响中考虑穿透系数与换气次数之间关联性的必要性。
Abstract：
Outdoor particulate matter can enter rooms through building envelope cracks, resulting in a poor indoor air quality. Generally, the ability of outdoor particles entering indoor spaces is quantified by particle penetration coefficient. Establishes a correlation model of particle penetration coefficient and air change rate, considering the key role of building envelope structural characteristics both in the indoor-outdoor air flow and the outdoor particle entering indoor spaces. Analyses and expounds the influence of air change rate on particle penetration coefficient. Discusses the necessity of the correlation between particle penetration coefficient and air change rate by a case simulation.
Keywords:outdoorparticulatematter,envelope,penetrationcoefficient,airchangerate,indoorairquality