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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Chen-Wei Chiu1, Yi-Hong Chang2 and Yi-Liang Shu3
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DOI:10.17265/1934-7359/2015.12.009
Affiliation(s)
1. Department of Fire Safety, National Taiwan Police College, Taipei 11696, Taiwan, R.O.C.
2. Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, R.O.C.
3. Department of Safety Health and Environmental Engineering, Central Taiwan University of Sciences and Technology, Taichung 40601, Taiwan, R.O.C.
ABSTRACT
This study applied the numerical
simulator tool FDS (fire dynamics
simulator), Version 5.53, and focused on the simulation of the natural smoke flow
ventilation design system, an innovative ventilation design using the parallel
processing technology MPI (message passing
interface). The design was then compared with the exhaust efficiency of a
typical natural smoke vent. The natural smoke flow ventilation design system was located at the
top of the factory, where smoke streams effectively converged. Therefore, the
source of fire was designed to be 2 MW, which has a better exhaust efficiency
than typical natural smoke vent with same area. The
simulation discovered that the exhaust efficiency of the natural smoke
ventilation design systems is higher than that of typical natural smoke vent
with 2 times the opening area and that was not affected by external wind speed.
Instead, external wind speed can help to
enhance the exhaust efficiency. Smoke exhaust of typical natural smoke vents
was affected by external wind speed, even leading them to become air inlets
which would disturb the flow of air indoors, leading to smoke accumulation
within the factory.
KEYWORDS
FDS, MPI, natural smoke flow ventilation design system, wind effect.
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