ABSTRACT In the paper, study on quantitative analysis between particle penetration and air change was made. In situ experiments in a practical office room were carried out. Through recording concentration of indoor and outdoor CO2 and PM2.5, particle penetration coefficients (Fp) corresponding to different air change rate (ACH) were obtained by fitting method. The uncertainty analysis by Monte-Carlo method showed that measurement error of CO2 has small effect on ACH determination while PM2.5 measurement error may lead to large Fpuncertainty when PM2.5 instrument is not suitable. The obtained Fp and ACH showed some linkage. With further theoretic analysis, a correlation between penetration coefficient of particles transferring through building envelope cracks and air change rate was found and an acceptable agreement between experimental data and the correlation was demonstrated. In addition, a general dimensionless correlation was derived to instruct how to decrease Fp in principle.

中文翻译：

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建筑围护结构中颗粒渗透与空气交换联系的原位调查

摘要 本文对粒子穿透与空气变化之间的定量分析进行了研究。在实际的办公室里进行了原位实验。通过记录室内外CO2和PM2.5的浓度，拟合方法得到不同空气变化率（ACH）对应的颗粒渗透系数（Fp）。Monte-Carlo方法的不确定度分析表明，CO2的测量误差对ACH测定的影响较小，而PM2.5的测量误差在PM2.5仪器不适用时可能导致较大的Fpuncertainty。获得的 Fp 和 ACH 显示出一些联系。进一步的理论分析，发现通过建筑围护结构裂缝传输的颗粒渗透系数与换气率之间存在相关性，并证明了实验数据和相关性之间的可接受的一致性。此外，推导出一般的无量纲相关性来指导原则上如何降低 Fp。