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Analysis of Cooling Air Current and Efficiency of Air Conditioning in the Underground Subway Station with Screen-Door Opening and Closing

도시철도 역사 스크린 도어 개폐에 따른 냉방 기류 해석 및 효율 비교 분석

  • Jang, Yong-Jun (Korea Railroad Research Institute, Railroad Safety and Certification Center) ;
  • Ryu, Ji-Min (Korea Railroad Research Institute, Railroad Safety and Certification Center) ;
  • Jung, Ho-Sung (Korea Railroad Research Institute, Smart Station Research team)
  • Received : 2014.06.12
  • Accepted : 2014.09.05
  • Published : 2014.10.31

Abstract

Numerical prediction methods were applied to investigate the turbulent air currents and air-conditioning efficiency in an underground subway station, and the results compared to experimental data. The Shin-gumho Station($8^{th}$ floor underground and 43.6m in depth) in Seoul was selected for the analysis. The entire station was covered for simulation and the ventilation mode was ordinary. The ventilation diffusers were modeled as 95 square shapes of $0.6m{\times}0.6m$ in the lobby and as 222 square shapes in the platform. Cooling air of $47,316m^3/h$ was supplied and the returned air of $33,980m^3/h$ is exhausted in the lobby and the cooling air of $33,968m^3/h$ is supplied and the returned air of $76,190m^3/h$ was exhausted in the platform which is the same as the experimental data. The cases of the screen-door-closed and open were respectively investigated. A total of 7.5million grids were generated and the whole domain divided into 22 blocks for MPI efficiency of calculation. Large eddy simulation (LES) was applied to solve the momentum and energy equation.

Acknowledgement

Supported by : 국토교통부

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