基于动态质量平衡的室内颗粒物沉降规律研究

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Abstract

Recently, the problem of indoor particulate matter pollution has received much attention. An increasing number of epidemiological studies have shown that the concentration of atmospheric particulate matter has a significant negative effect on human health. Since individuals may spend more than 90% of their time indoors, it is critical to understand the relationship between the particle concentrations from outdoors and those indoor micro-environments. In this experiment, taking an example of the office room located in Qingdao, an optical counter with four size intervals was employed to measure the indoor and outdoor particle size distribution in the range of 0.3~2.5μm and the collection time from April to September, 2016. Based on the experimental data, a time-based dynamic mass balance model was used to estimate the number of exchange air rate as 0.03~0.25h^-1.The results of penetration factor and deposition velocity in the range of natural ventilation were 0.45~0.82h^-1 and 0.94~2.82m/h, respectively. In addition, the variation of indoor particle distribution parameters with the size was also investigated. This study provided the data for the further research on the transport mechanism and trajectory of indoor particles.

Key words： dynamic mass balance model I/O ratios natural ventilation rate particle penetration factors deposition rate

Received: 01 September 2017

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	Articles by authors
	CONG Xiao-chun
	ZHAO Jian-jian
	JING Zhou
	WANG Qing-gang
	NI Peng-fei

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CONG Xiao-chun,ZHAO Jian-jian,JING Zhou等. Study on the deposition law of indoor particulate matters based on dynamic mass equlibrium[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1265-1273.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I4/1265

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