Influence of smoke exhaust start-up time on smoke control

WANG Wandi; ZHANG Hui

doi:10.16511/j.cnki.qhdxxb.2015.22.023

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Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (2) : 223-228. DOI: 10.16511/j.cnki.qhdxxb.2015.22.023

ENGINEERING PHYSICS

Influence of smoke exhaust start-up time on smoke control

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Abstract

Fire smoke exhaust systems in buildings need accurate designs of the smoke exhaust start-up time. The start-up time is mainly determined by expert experience or the performance of constant exhaust systems, which are very subjective. This paper describes a recursive solution method to calculate the smoke layer height that integrates empirical models. A sensitivity analysis method is then used to study the influence of the smoke exhaust start-up time on the smoke control. Methods are given to calculate the best start-up time, the risk start-up time, and the critical invalidation start-up time. These findings can be used to improve smoke exhaust systems.

Key words

building / fire / smoke exhaust start-up time / sensitivity / smoke control

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WANG Wandi, ZHANG Hui. Influence of smoke exhaust start-up time on smoke control[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(2): 223-228 https://doi.org/10.16511/j.cnki.qhdxxb.2015.22.023

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