A Study on $CO_2$ and PM10 Changes by Operation of KTX HVAC-Pressurization Equipment in Tunnel Sections

터널구간 운행시 KTX HVAC-여압장치 작동에 따른 $CO_2$와 PM10 변화연구

  • 소진섭 (한국철도공사, 철도연구원) ;
  • 유성연 (충남대학교 기계설계공학과)
  • Published : 2007.12.31


The Ministry of Environment established a guide line in December 2006, "Indoor Air Quality Management guidelines in Public Facilities." As the items of the guideline, $CO_2$ (Carbon dioxide) and PM10 (particulate matter) is shown to Level 1 and 2. Therefore trains and subways are included. There are a lot of tunnels by the lay of mountains on KTX (Korean Train Express) service. HVAC (Heating Ventilating and Air-conditioning)-pressurization equipment on KTX is various functioning flaps blocking outside pressure waves. At that time, the fresh air is blocked by flap operation and the air is circulated by return air. In this study, we measured the time series of $CO_2$ and PM10 concentrations in the KTX passenger cabin during the train service of Gyongbu line (Seoul-Busan) and Honan line (Yongsan-Mokpo) from July 2006. Also, analyzed the air quality by operation of KTX HVAC-pressurization equipment in tunnel passing point. As a result, PM10 concentration was totally lower than the regulation values. However, $CO_2$ was highly correlated with several tunnels, such as Oksan-Otan, Godeung-Hyudae and Gaechak-Iijik tunnel. but, the indoor air quality of KTX train have been proved satisfy the recommendation the Ministry of Environment guidelines.


  1. 소진섭(2006), '철도차량 객실내 실내공기환경(IAQ)의 효율적 관리방안', 한국철도기술 1-2월호, pp.40-43
  2. 환경부(2006), '지하철 등 대중운송수단의 실내공기질 실태조사 및 관리방안', 가톨릭대 예방의학교실, 대한산업보건협회
  3. 환경부(2007), '대중교통수단 실내공기질 관리 가이드라인'
  4. 소진섭, 강성해(2006), '열차 객실 공기질 향상 방안 연구', 한국 철도학회, 학술발표대회논문집, pp.7-10
  5. 소진섭, 이성욱, 박덕신, 유성연(2006), 'KTX 객실내 공기청정도 측정', 한국철도학회, 학술발표대회논문집, pp.27-30
  6. 권순박, 조영민, 박덕신, 박은영(2006), 'KTX 객실의 $Co_2$ 농도와 승객 수 및 터널구간과의 상관관계', 한국철도학회, 학술발표대회 논문집, pp.41-44
  7. 조영민, 박덕신, 권순박, 박은영(2006), '고속철도 운행시 객실 실내공기질 변화 연구', 한국대기환경학회, 학술대회논문집, pp.553-554
  8. 한국철도공사(2006), '열차 객실 공기청정도 향상 방안 연구', 철도연구개발센터, 1차년도 보고서(KRDC-종-06-12)