Pris: 29,-

Abstrakt

The issue of air quality within train cabins is attracting considerable attention of late, as public railway transportation travel has expanded exponentially. In particular, operational agencies and passengers are increasingly concerned about the concentration of particulate matters and CO2 affecting air quality of passenger cabins. This study has observed PM¹⁰ and CO2 concentration in the cabin of urban railway trains and analyzed the factors affecting air quality using a multivariate statistical analysis. Measurements have been conducted at Seoul metropolitan subway 8 lines and an additional Bundang line during three seasons.
The results show that the mean concentration level of the PM¹⁰ and CO2 inside subway cabins is at the range of 62.6 to 108.0 microgram/m³ and 907 to 2,008 ppm, respectively. The CO2 level in specific sections during the rush hours has exceeded national guidelines, which requires designated train ventilation controls. The analysis of the influence factor correlation and regression implies that the CO2 level is severely influenced by the number of passengers and the PM¹⁰ level is also correlated with the number of passengers. In particular, the PM¹⁰ level in the cabins indicates a positive correlation with the outdoor PM¹⁰ level. In addition, the PM concentration has been highly affected by the number of passengers and the distance between stations.

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