• Title/Summary/Keyword: 화재 사고

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Temperature and Flow Velocity Simulation for Fire in Synthetic Heat Transfer Fluid Boiler (열매유 보일러 내부 화재에 따른 온도 및 속도분포 시뮬레이션)

  • Kim, Yeob-Rae;Lee, Dong-Myung;Kim, Yun-Zeung
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2012.04a
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    • pp.472-475
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    • 2012

  • MDF(Medium Density Fiberboard) 제조공정에 필요한 열매유(SHTF, Synthetic Heat Transfer Fluid)를 가열하는 보일러에서 화재가 발생하였다. 열매유 보일러는 1차 패스, 2차 패스, 3차 패스로 구성되어 있으며, 화재가 발생된 1차 패스 연소대 위쪽 14단 부근에서 열매유가 방출되었다. 화재확산으로 인한 조사내용 및 데이터를 토대로 화재 시뮬레이션용 전산유체역학인 ANSYS-CFX를 이용하여 재현하고 화재 모델링 해석 및 분석을 통해 화재 온도를 산정하고 피해의 범위를 규정하였다. 본 화재 사고로 설비의 운전 및 소재에 대한 피해를 규정하고, 이론에 의한 과학적인 정밀 조사를 실시하여 향후의 안전 운전을 위한 제안을 하고자 한다.

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Experimental Study on Flow Direction of Fire Smoke in DC Electric Fields (DC 전기장 내에서 발생하는 화재연기 진행 방향에 대한 실험적 연구)

  • Park, Juwon;Kim, Youngmin;Seong, Seung Hun;Park, Sanghwan;Kim, Ji Hwan;Chung, Yongho;Yoon, Sung Hwan
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.27 no.5
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    • pp.675-682
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    • 2021

  • Fire accidents on land and at sea can cause serious casualties; specifically, owing to the nature of marine plants and ships, the mortality rate at sea from suffocation in confined spaces is significantly higher than that on land. To prevent such cases of asphyxiation, it is essential to install ventilation fans that can outwardly direct these toxic gases from fires; however, considering the scale of marine fires, the installation of large ventilation fans is not easy owing to the nature of marine structures. Therefore, in this study, we developed a new concept for fire safety technology to control toxic gases generated by fires from applied direct current (DC) electric fields. In the event of a fire, most flames contain large numbers of positive and negative charges from chemi-ionization, which generates an "ionic wind" by Lorentz forces through the applied electric fields. Using these ionic winds, an experimental study was performed to artificially control the fire smoke caused by burning paper and styrofoam, which are commonly used as insulation materials in general buildings and ships. The experiments showed that a fire smoke could be artificially controlled by applying a DC voltage in excess of ±5 kV and that relatively effective control was possible by applying a negative voltage rather than a positive voltage.

  • https://doi.org/10.7837/kosomes.2021.27.5.675 인용 PDF KSCI