Analysis to ventilation effectiveness in subway fire environment

Author

Wu, Wen-zhong ; You, Shi-jun

Author_Institution

Sch. of Environ. Sci. & Technol., Tianjin Univ., Tianjin

fYear

2009

fDate

25-27 May 2009

Firstpage

3215

Lastpage

3219

Abstract

When longitudinal ventilation is activated in subway station platform fire, smoke-control effectiveness depends on ventilation effectiveness. With the ventilation motion analyzed, its time at staircase is decreased and ventilation effectiveness gets better all along platform. In case of 30 MW fire with 80 m³/s smoke volume flow rate, longitudinal ventilation of bigger than 1.5 m/s freshens platform all around for less than 100 s, therefore, smoke back-layer is pushed downstream the fire source in 1 min or so, leaving clean area upstream the fire source for evacuation and fire-fighting.

Keywords

fires; railway safety; ventilation; air flow motion; longitudinal ventilation; smoke back-layer; smoke-control effectiveness; subway station platform fire; ventilation effectiveness; Computational fluid dynamics; Fires; Force measurement; Motion analysis; Navier-Stokes equations; Noise measurement; Noise robustness; Transfer functions; Ventilation; Vents; Fire; Mean age of air; Smoke control; Subway; Ventilation effectiveness;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4244-2799-4

Electronic_ISBN

978-1-4244-2800-7

Type

conf

DOI

10.1109/ICIEA.2009.5138795

Filename

5138795