ANALYSIS OF INDOOR AIR QUALITY IN HIGH-SPEED TRAIN PASSENGER CABIN IN KOREA

The indoor air quality management of the public places is gaining wide attention in Korea, because the indoor air quality of the public places are obliged to satisfy the guidelines suggested by Korean Ministry of Environment. According to this regulation, the railroad stations are regarded as public places while the passenger cabin of train is excluded. However, because the passengers spend more time in the passenger cabin than in the stations, the indoor air quality management of the passenger cabin is more important. Recently, Korean government prepares a new law which is regulating the indoor air quality of the railroad passenger cabin. In this study, the indoor air quality of the high-speed train passenger cabin in Korea was investigated to prepare the appropriate guidelines for the passenger cabin. The temperature, relative humidity, particulate matter concentration, carbon monoxide concentration, carbon dioxide concentration, formaldehyde concentration, and volatile organic compound concentration were measured during the running of the train with passengers. The carbon dioxide concentration was measured to largely exceed the normal indoor air quality guideline level, 1,000 ppm (particle per million). Therefore, the appropriate countermeasure to reduce the carbon dioxide concentration is required. In case of particulate matter, PM-10 concentration was measured to b