自然状态下居民区地下车库PM_(1.0)颗粒污染的现场研究  

Field Measurement on PM_(1.0) Number Concentration in a Residential Underground Garage with a Natural State

作　　者：赵宇[1] 赵加宁[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《建筑科学》2015年第8期157-163,共7页Building Science

摘　　要：地下车库中纳米级颗粒物(PM1.0)计数浓度比计重浓度对评价其空气品质有更直观的意义。本文对哈尔滨某居民区地下车库进行了一周的连续测试,并对影响颗粒浓度变化的主要因素进行分析。通过研究发现,车库内颗粒物平均浓度的小时变化规律大体为早晚时段较高,其他时段较低。但工作日浓度晚高峰并没有休息日明显。工作日和休息日颗粒物浓度全天平均值和峰谷差的比值分别为1.45和1.24。颗粒物浓度变化主要受车辆小时活动数、车库出入口逐时风速和车库出入口逐时温度三变量的共同影响,各参数对颗粒浓度变化的影响程度难分伯仲。The number concentration of nano-particle is more meaningful compared with mass concentration when analyzing air quality in an underground garage. This paper conducted a continuous week field measurement on PM1.0 （particles with diameter smaller than 1 μm）, traffic flow and environmental parameters at a residential underground garage in Harbin, China. The main factors influencing the variation of particle number concentration were also evaluated in this paper. The results showed that characteristics of hourly averaged PM1.0 concentration had a general U-shaped trend that was high during morning and evening rush hour and low during other periods at both weekdays and weekends. However, peak of PM1.0 concentration during evening rush hour at weekdays was not obvious in contrast with the trend at weekends. Ratios of daily averaged PM1.0 concentration and peak to trough variation between weekdays and weekends were 1.45 and 1.24, respectively. Traffic flow, temperature and wind velocity at entrance/exit were three main factors influencing PM1.0 concentration. Those three factors were capable of influencing each other when dominating variation of PM1.0 concentration. There was no leading factor observed when influencing PM1.0 concentration during field measurement.

关 键 词：居民区地下车库 PM1.0 计数浓度 现场研究 

分 类 号：TU834.8[建筑科学—供热、供燃气、通风及空调工程]