摘要
本文测试了北京、上海和广州地铁系统PM2.5浓度,测试区域分为站外、大厅、站台和车内。测试仪器采用手持式粉尘测量仪,仪器工作原理为β射线吸收法。测试结果表明:地铁系统PM2.5浓度由大到小依次为站外、大厅、站台、车内;但当站外PM2.5浓度极低时,地铁系统PM2.5浓度呈现的规律正好相反。测试结果显示地铁车内与站外PM2.5浓度存在回归直线关系;降雨及台风气候会降低车内PM2.5浓度;地铁载客量对车内PM2.5浓度无影响。
A test of PM2.5 concentration in Beijing, Shanghai and Guangzhou metro systems is performed, and the test area is divided into inbound, hall, platform and carriage. The handheld dust measuring instrument is employed, and its working principle is beta ray absorption theory. The results show that, the distributions of PM2.5 concentration in metro systems from big to small are as follows： inbound, hall, platform and carriage; when PM2.5 concentrations in inbound is very low, the distribution principle of PM2.5 concentrations of metro system is just the opposite. The results show that, PM2.5 concentrations in the metro carriage and the inbound have a regression linear relationship; the rainfall and typhoon will lower the PM2.5 concentrations in metro carriages, and metro passengers have no effect on PM2.5 concentrations in metro carriages.
出处
《制冷技术》
2014年第5期13-16,共4页
Chinese Journal of Refrigeration Technology
关键词
地铁系统
PM2.5
回归直线关系
载客量
Metro system
PM2.5
Regression linear relationship
Metro passengers
