A study on the improvement of the air exhaust system at the PSD installed subway station

Soon-Bark Kwon; Ji-Han Song; Ju-Hwan Ryu; Seung-Won Jo; Tae-Suk Oh; Sung-Joon Bae; Hyo-Gyu Kim

doi:10.9711/KTAJ.2015.17.3.353

All Issue

2015 Vol.17, Issue 3 Preview Page Next Page

A study on the improvement of the air exhaust system at the PSD installed subway station 도시철도 지하역사 PSD 설치에 따른 배기시스템 개선 연구

31 May 2015. pp. 353-362

PDF XML

Abstract

Platform screen door (PSD) installed at underground subway station has reduced the safety accident, but it may cause poor air ventilation condition due to the isolated exhaust duct in the subway tunnel area. In this study, the additional ventilation system was suggested, which can be installed at a void space (i.e., storage room under stairs) of platform in order to improve efficiency of air ventilation rate. Exhausted air from platform was directed to underneath of platform and joined with existing ventilation duct of train exhaust system (TES). One subway station in Seoul city was selected to predict the effectiveness of the suggested lower exhaust system by using the computational fluid dynamics (CFD) analysis. The predicted mean age of air was decreased by 16.5% which proves the improvement of air ventilation efficiency when the suggested lower exhaust system was applied.

Keywords

Subway

Platform

Ventilation system

Platform Screen Door

Lower Exhaust System

도시철도 지하역사에 설치되어 운영중인 승강장 안전문(PSD)은 승객의 추락방지 등 안전사고 예방에 큰 기여를 하고 있지만, 기존 승강장 선로 배기설비의 차단으로 인해, 일부 역사에서 승강장내 환기효율 저하문제를 발생시키고 있다. 본 연구에서는 PSD가 설치된 승강장의 기존 급배기 시스템의 환기효율 개선을 위해, 승강장과 대합실로 통하는 계단부 하부공간의 무효한 공간(창고)에 국부적인 하부 배기시스템을 추가하고, 승강장 배기용 덕트를 선로부의 기존 배기시스템에 연결하여 연동함으로써 기존 시스템에 무리 없이 승강장 실내환경을 개선하고자 하였다. 즉, PSD 설치이후 승강장 내부의 전체적인 기류혼합효과와 오염된 실내공기를 효율적으로 배출하기 위한 하부배기 방식을 연구하였다. 이러한 하부배기 방식의 효과를 예측하기 위하여, 서울지하철 2호선 역사를 선정하여 급배기량을 실측하고, 이를 바탕으로 전산수치해석 연구를 수행하여 개선효과를 예측해보았다. 하부 배기시스템의 적용은 승강장 기류의 지체상태 및 환기효율 특성을 나타내는 공기연령 측면에서 약 16.5%의 개선효과가 있는 것으로 분석되었다.

키워드

도시철도

승강장

환기시스템

스크린도어

하부배기시스템

References

1.Bartak, M., Cermak, M., Clarke, J.A., Denev, J., Drka, F., Lain, M., Macdonald, I.A., Majer, M., Stankov, P. (2001), “Experimental and numerical study of local mean age of air”, Proceedings of the 7th International Building Performance Simulation Association Conference, pp. 773-779.

2.Chow, W.K., Qu, L., Pang, E.C.L. (2011), “Incidents on fire and ventilation provision in subway systems in Hong Kong”, International Journal on Engineering Performance-Based Fire Codes, Vol. 10, No. 3, pp. 41-47.

3.Huang, Y.-d., Gong, X.-l., Peng, Y.-j., Lin, X.-y., Kim, C.N. (2011), “Effects of the ventilation duct arrangement and duct geometry on ventilation performance in a subway tunnel”, Tunnelling and Underground Space Technology, Vol. 26, pp. 725-733.

4.Jeon, J.-S., Yoon, J.-C., Lee, H.-C., Eom, S.-W., Chae, Y.-Z. (2012), “A noticeable change in indoor Radon levels after platform screen doors installation in Seoul subway station”, Journal of Korean Society for Atmospheric Environment, Vol. 28, No. 5, pp. 59-67.

5.Lee, S.Y., Lee, I.B., Park, S.J. (2014), “Development of a straightforward method of estimating age-of- air using CFD”, Int. Conference of Agricultural Eng., (Ref. C0564), pp. 1-8.

6.Lee, T.-J., Jeon, J.-S., Kim, S.-D., Kim, D.-S. (2010), “A comparative study on PM10 source contributions in a Seoul metropolitan subway station before/after installing platform screen doors”, Journal of Korean Society for Atmospheric Environment, Vol. 26, No. 5, pp. 543-553.

7.Meng, N., Hu, L., Wu, L., Yang, L., Zhu, S., Chen, L., Tang, W. (2014), “Numerical study on the optimization of smoke ventilation mode at the conjunction area between tunnel trak and platform in emergency of a train fire at subway station”, Tunnelling and Underground Space Technology, Vol. 40, pp. 151-159.

8.Park, S.-J., Lee, I.-B., Hong, S.-W., Kwon, K.-S., Ha, T.-H., Yun, N.-G., Kim, H.--G., Kwon, S.-H. (2013), “Development of straightforward method of estimating LMA and LMR using computational fluid dynamics technology”, Journal of the Korean Society of Agricultural Engineers, Vol. 55, No. 6, pp. 135-144.

9.Roh, J.S., Ryou, H.S., Park, W.H., Jang, Y.J. (2009), “CFD simulation and assessment of life safety in a subway train fire”, Tunnelling and Underground Space Technology, Vol. 24, pp. 447-453.

10.Sandberg, M., Sjoeberg, M. (1983), “The use of moments for assessing air quality in ventilated rooms”, Building and Environment, Vol. 18, No. 4, pp. 181-197.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 17
No :3
Pages :353-362
Received Date : 2015-05-01
Revised Date : 2015-05-11
Accepted Date : 2015-05-13
DOI :https://doi.org/10.9711/KTAJ.2015.17.3.353

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue