基于动态质量平衡的室内颗粒物沉降规律研究.PDF

中国环境科学 2018,38(4) ：1265~1273 China Environmental Science 基于动态质量平衡的室内颗粒物沉降规律研究 * 丛晓春 ,赵建建,景 洲,王庆刚,倪鹏飞 ( 山东科技大学,土木工程防灾减灾重点实验室, 山东 青岛 266590) 摘要： 目前室内颗粒物污染问题已经受到广泛关注.越来越多的流行病学研究表 ,大气悬浮颗粒物浓度对人体健康存在显著的负影响. 由 于个人在室内滞留的时间可能超过全天时间的 90 ％,因此剖析室外颗粒物向室内的传输渗透机理,对掌握室内微环境下的颗粒浓度水平至 关重要.本实验以青岛一办公室为研究对象,使用具有 4 个尺寸间隔的光学计数器同时测量室内和室外的颗粒物浓度,粒径分布范围在 0.3~2.5µm,采集时间为 2016 年 4 月~9 月.根据实验数据,采用基于时间的动态质量平衡模型,估算了换气次数在 0.03~0.25h- 1 范围内的室内 颗粒物渗透率和沉降速率分别为 0.45~0.82h- 1 和 0.94~2.82m/h,并分析了这些参数随粒径大小的变化规律.其结论为进一步研究颗粒物在室 内的传输机理和运动轨迹提供参数. 关键词：动态质量平衡模型；室内外颗粒物浓度比；换气次数；渗透率；沉降率 中图分类号：X513 文献标识码：A 文章编号：1000-6923(2018)04-1265-09 * Study on the deposition law of indoor particulate matters based on dynamic mass equlibrium. CONG Xiao-chun , ZHAO Jian-jian, JING Zhou, WANG Qing-gang, NI Peng-fei (Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China). China Environment Science, 2018,38(4)：1265~1273 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 Septe