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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。
Outdoor particulate contaminants can enter the room through the gaps in the building envelope and have an impact on the indoor air quality. Penetration coefficient is often used to characterize the passage of outdoor particulate contaminants through the building envelope to the interior. Considering the key role played by the building envelope in the exchange and circulation of indoor and outdoor air and the entrance of outdoor particulate into the interior, a model was established to determine the relationship between the penetration coefficient and the number of air changes of the exterior envelope. Analyzed and expounded the influence of the number of ventilation on the particle penetration coefficient. Through the numerical calculation of simulated working conditions, the necessity of considering the relationship between the penetration coefficient and the number of ventilation in the study of the influence of outdoor environment on the concentration of indoor particle pollutants was discussed.