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The Effects of the Area of Openings on the Performance of a $CO_2$ Extinguishing System -The CFD Simulations of the Oil Surface Fire in a Machine Room-  

Jeon, Heung-Kyun (대구보건대학 소방안전관리과)
Choi, Young-Sang (대구보건대학 소방안전관리과)
Park, Jong-Tack (대구보건대학 소방안전관리과)
Publication Information
Fire Science and Engineering / v.22, no.1, 2008 , pp. 1-9 More about this Journal
Abstract
Carbon dioxide($CO_2$) agent, which has more safely extinguished fire than any other gaseous fire extinguishing agents, has been widely used in various protected enclosures and types of fires. According to the concept of performance-based design(PBD). $CO_2$ extinguishing system to be designed is needed to be evaluated for the performance of fire suppression with possible fire scenarios in an enclosure. In this paper, CFD simulations were carried out to study the effects of opening area on the performance of $CO_2$ extinguishing system and the flow characteristics in the machine room of $100m^3$ in which kerosene spill fire happened. This study showed that time of fire suppression increased linearly in proportion to the size of opening area, and fires for each model were completely suppressed prior to the end of discharge of $CO_2$ agent. It was shown that mass flow rate through opening was influenced by the combined effects of heat release rate of fire and discharge of $CO_2$ agent. After $CO_2$ agent was completely discharged, oxygen concentrations in enclosures for each model were lower than the limit concentration of combustion.
Keywords
$CO_2$ agent; Performance-based design; CFD simulations; Opening area; Performance of $CO_2$ extinguishing system;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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