Time to Flashover for Fires in a ‘Bare Cabin’ with Smoke Extraction System

Abstract

Fires in 'cabins' with only the smoke extraction ystem operating were studied. Cabins of length up to lOm, width up to 8m and height up to 5m, with d@erent ventilation conditions under a NFPA t-fire with a cut-off value of5 MW were investigated. Thefire environments due to all the four sets of slow, meduim, fast, and ultra fm P-fires were tested. i'bepre zone model FIREWND was selected as the simulation tool. The total number of simulations was 14,400, including four m k e exhaust rates. The time toflashover wascomputedfortwod@erent timesofoperation of t h e m k e extraction system. It is found that without operating the sprinkler system, Jlasbover would occur under many conditions with the time to JIashoverasfmas2oos.