严寒地区被动房冬季PM2.5测试分析

Measurement and Analysis of PM2.5 in Passive Residential Building during Winter in Severe Cold Region

严寒地区某被动房采用了机械通风系统,建筑气密性高。为深入了解该被动房室内颗粒物浓度水平,对该被动房冬季8户住宅的PM2.5质量浓度进行间歇现场测试,并对其中2户典型住宅的PM2.5质量浓度进行连续现场测试。结果表明:在室内无明显颗粒物源的住户中,室内PM2.5污染水平主要受室外PM2.5的影响,室内外PM2.5质量浓度的相关系数大于0.78。当室内人员烹饪或吸烟时,室内外PM2.5质量浓度的相关性非常弱,其客厅和厨房的PM2.5质量浓度I/O比大于4。被动房室内PM2.5质量浓度比普通节能建筑低。

Mechanical ventilation system is adopted in a passive residential building in severe cold area,resulting in high air tightness in the building.In order to gain a deeper understanding of the indoor particulate matter concentration level,intermittent field tests were conducted on the PM2.5 mass concentration of 8 households in the passive residential building in winter,and continuous field tests were conducted on the PM2.5 mass concentration of 2 typical households.The results show that in households without obvious particulate matter sources indoors,the indoor PM2.5 pollution level is mainly affected by outdoor PM2.5,and the correlation coefficient between indoor and outdoor PM2.5 mass concentration is greater than 0.78.When indoor personnel cook or smoke,the correlation between indoor and outdoor PM2.5 mass concentration is very weak,and the I/O ratio of PM2.5 mass concentration in the living room and kitchen is greater than 4.The indoor PM2.5 mass concentration in the passive residential building is lower than that in ordinary energy-saving buildings.