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정병철(Jung Byung Chul),강석택(Kang Seok Taek),박영훈(Park Young Hoon) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Modern people stay at indoor places about 90% of a day. Dust is the one of major indoor air pollutants. Optimal dust filtering method should be supplied for the HVAC system of railway vehicle running at desert area so as to protect the dust ingress into the passenger area. In this study, we analyzed the dust particle size to design the optimal filtering device for the ambient air condition of desert in Saudi arabia.
정병철(Jung Byung-Chul),염경안(Yeom Kyong-An),강석택(Kang Seok-Taek) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
As the train run through the tunnels, especially at high speed, pressure shock developed by the running train gives the influence on the pressure fluctuation inside the tunnel and consequently, inside the car. This pressure changes and pressure gradient is closely related with the tunnel section, train speed, air tightness of the train, length of the tunnel, etc. This study includes the analysis of the pressure behavior at the varied train speed and tunnel length. The results show that train speed affects the pressure gradient inside the car almost linearly, and that there exist the critical tunnel lengths that gives the maximum value of pressure change and pressure gradient, respectively.