Experimental Investigation of Air Quality in a Subway Station with Fully Enclosed Platform Screen Doors

Abstract

In this study, the indoor air quality (IAQ) was investigated in a subway station with fully enclosed platform screen doors in Beijing, China. Eight indoor air pollutants, including PM2.5, PM10, SO2 (sulfur dioxide), NO2 (nitrogen dioxide), NH3 (ammonia), CO (carbon monoxide), CH2O (formaldehyde) and TVOC (total volatile organic compound), were measured for six consecutive days in October 2019. The results indicated that the IAQ in the subway station was basically stable at good levels for most times during the whole measurement period. All eight indoor air pollutants were far below their corresponding maximum allowable concentrations, except for the PM2.5 concentrations, which occasionally exceeded the concentration limits. The concentrations of indoor air pollutants in the subway station were basically within the corresponding standards. The correlation analyses showed that outdoor air pollutants have important influences on indoor air pollutants. The concentrations of PM10, PM2.5, SO2, NO2 and CO in the subway station were positively correlated with their corresponding outdoor concentrations. PM10 was statistically significantly correlated with the passenger flow and train frequency, but the other air pollutants were less impacted by the passenger flow and train frequency.

Justification of an Energy-Efficient Air Purification System in Subways Based on Air Dust Content Studies

“…Computational modeling methods are widely used to predict the processes of dusty air flow movement [22][23][24][25], which make it possible to determine the parameters of dust transfer processes and the effectiveness of dust collection methods and perform air quality assessment in buildings and structures [26,27]. In general, it is possible to note the high interest of scientists around the world in studies of the dustiness of air in subways [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]28] and methods of reducing dust concentrations.…”

The characteristics of particulate matter in different subway station environmental control systems

“…A lot of research has already studied the presence of PM2.5 and PM10 in subway stations [ [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] ]. The geographical locations covered by this research are shown in Table 1 .…”