过渡季假日上海地铁城郊线路车厢内空气环境的实测

Air Environment in Subway Cars of Country-Suburb Lines on Holidays in Transition Seasons in Shanghai

在过渡季节,乘客是地铁车厢内部主要污染源和热源.为了解上海地铁城郊线路车厢空调系统的控制状况,以上海市轨交系统9号线为城郊线路代表作为实测对象,在以国庆节为代表的过渡季假日,对车厢内空气温湿度、CO_2浓度和人员密度进行了连续测量.实测结果表明,假日车厢内人员密度在0.3~3.0人/m^2范围内波动;当空调系统运行时,车厢内部空气温度在正常范围内波动,几乎不受人员密度影响;车厢内CO_2浓度随着人员密度增大而明显升高,但80%的时间CO_2浓度低于0.15%,通风排污效果基本能够满足假日地铁运行状况的要求.

Passengers are considered as the major pollution and heat source in subway cars of countrysuburb lines in transition seasons.To know the control status of carriages air conditioning system in Shanghai subways cars,a continuous survey is carried out about the air temperature,moisture,CO_2 concentration and person density of Shanghai Subway Line 9 in national holidays representing holidays during transition seasons.The results show that person density fluctuates in the range of 0.3~3.0pl/m^2 in the carriages on holidays.When the air conditioning system is operating,the air temperatures in the carriages rise and fall in the normal range and have nothing to do with the person density.Besides,the CO_2 concentration rises high with person density,but 80% of the time belows 0.15%,which indicates that sewage effects of ventilation meet the requirements of subways operation on holidays.