沪九直通车内微小气候及空气质量的影响因素分析

Analysis the influencing factors of microclimate and air quality of the Shanghai-Kowloon through train

目的了解沪九直通车车内空气状况,分析影响因素。方法对2013年5月—2014年3月沪九直通车车内微小气候、空气质量、噪声的监测数据进行评价、开展统计学分析。结果夏季各项目合格率普遍高于冬季;同一车厢内的空气状况差别不大;随着行车时间的增加,温度、CO2、噪声、可吸入颗粒物、甲醛与行车中差异有统计学意义(P<0.05);不同席别车厢中,CO2、噪声、可吸入颗粒物差异有统计学意义(P<0.05)。结论沪九直通车的微小气候及空气质量状况有待提高,席别不同、季节、变化和行车时间的增加对车内微小气候及空气质量具有一定影响,而同一席别车厢内部的空气状况则大致相似。

Objective To analyze the interior air quality and influencing factors of the Shanghai-Kowloon through train. Methods Nine items, including microclimate（temperature, humidity, wind speed）, air quality（CO2, CO and inhalable particulate matter（PM10）, formaldehyde, total bacteria count）, noise of the Shanghai-Kowloon through train were detected from May 2013 to March 2014. Kruskal-Wallis H（K）and Mann-Whitney U were used as statistical method. Results The qualified rate of all the items was higher in summer than winter. There was no significant difference of the air condition in the same carriage. There were notable changes of temperature, CO2, noise,inhalable particulate matter, formaldehyde with the increase of travel time（P 〈0.05）. Statistic differences of CO2,noise, inhalable particulate matter existed among different carriages（P 〈0.05）. Conclusion The improvement for microclimate and interior air quality of Shanghai-Kowloon through train is needed. Carriage, season and travel time could be the influencing factors for microclimate and interior air quality, while interior air quality in one certain carriage was approximately similar.