Arnold, Lukas

Schröder, Benjamin

Juelich Shared Electronic Resources

Mitglied der Helmholtz-Gemeinschaft SMOKE AND HEAT EXTRACTION IN  UNDERGROUND STATIONS  Evaluation of different concepts in a representative geometry  Contact b.schroeder@fz-juelich.de | Web www.fz-juelich.de/ias/jsc/firesim Pilot study  §  structural standard types derived from field data §  natural ventilation §  Latin Hypercube Sampling:   §  in the first instance: exceedance of tenability temperatures at the platform edges:   §  tenability variation from 179 to 580 s §  highest correlation: fire intensity coefficient §  highest tenability periods at low temperature gradients between underground and surface Concept study §  dimension reduction based on the insights of the pilot study  §  4 combinations out of the following mechanical ventilation strategies: §  ceiling extraction (A) §  punctual extraction at the stairway lintel (B) §  inlet air through the stairways (C)  §  gas temperatures strongly influenced by ambient temperatures and inlet air flow regimes:  §  increase of tenability periods from 426 to > 900 s §  revealed influence position seat of fire  Outlook: extension by assessment of optical and toxic smoke magnitudes Latin hypercube sampling Ambient temperature Tunnel temperature xmin Tunnel temperature xmax Fire intensity coefficient Maximum Heat Release Rate  Position seat of fire Ceiling height Climate Design fire Structure 45 Lage der Zulufto¨↵nung im Computermodell (gelbe Fla¨che)VerteilerebeneEinblaso¨↵nung der ZuluftA     B    C 

Smoke and Heat Extraction in Underground Stations

http://juser.fz-juelich.de/record/282907/files/ppt_a0_hoch.pdf

Smoke and Heat Extraction in Underground Stations

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