• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.193-196
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• 2011

본 연구는 주거시설의 대표적인 가연물을 고정가연물과 적재가연물로 구분하여 가연물의 연소특성을 실험결과에 대한 연구이다. 고정가연물은 7종에 대하여 Cone Calorimeter로 적재가연물은 2종 Furniture Calorimeter로 실험을 실시하였다. 고정가연물의 경우 접착성분을 지니고 있는 시트지의 경우가 HRR등이 높게 측정되었으며, 적재가연물의 경우 섬유성분과 플라스틱으로 구성되어 있는 의자가 높게 측정되는 것을 알 수 있었다.

• Journal of the Society of Disaster Information
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• v.17 no.2
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• pp.351-364
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• 2021

Purpose: Fire load analysis was conducted to secure basic data for evaluating fire risk of educational facilities. In order to calculate the fire load through a preliminary survey, basic data related to the fire load of school facilities were collected. Method: The basic data were the definition and types of fire loads, combustion heat data for the calculation of fire loads. The fire load was evaluated by multiplying the combustion heat by the weight of the combustibles in the compartment when calculating the fire load. Result: As for the fixed combustible materials of A-elementary school, the floor was mainly made of wood, in consideration of emotion and safety in the classroom, music room, and school office, and the rest of the compartments were made of stone. The ceiling and walls were made of gypsum board and concrete, so they were not combustible. The typical inflammable items in each room were desks, chairs, and lockers in the classroom, and the laboratory equipment box and experimental tool box were the main components in the science room, and books, bookshelves, and reading equipment occupied a large proportion in the library room. Conclusion: 'The fire loads of A-elementary' schools according to the combustibles loaded were in the order of library, computer room, English learning room, teacher's office, general classroom, science hall, and music room.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.10a
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• pp.275-278
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• 2010

최근 주거시설의 내장재는 다양화 되어 가고 있지만 안정성 보다는 디자인, 기능성에 치중되어 그에 따른 화재 위험성도 커져가고 있다. 또한 여러 가지 합성수지로 예상치 못한 화재성상을 보이고 있으나 이에 따른 법규는 미비한 실정이다. 따라서 본 연구는 고정가연물중 주거시설에서 많이 사용되어지는 시료를 선정하여 Cone Calorimeter를 이용해 그 연소특성을 알아보았다. 그에 따른 결과로 바닥재는 국내산이 높은 발열량을 보였고 벽지는 국외산이 높은 발열량을 보였다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.188-189
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• 2013

본 논문에서는 산업현장과 교육시설에서의 가정용 소형 단상변압기의 규격품 사용 여부와 운영상의 안전성 실태를 분석하였다. 전기용품 안전 관리법에 따른 법정인증을 받지 않은 제품이 5개 조사되었으며, 단자 체결형 변압기의 경우 전원선 접속 불량(헐거움), 설치 및 고정 불량, 접지 미체결(누락), 전압조정 핸들 파손, 변압기 상부 가연물 방치가 주요 불합리 항목으로 조사되었다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.41-46
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• 2018

In this research, numerical analysis was performed to determine the effects of hydrogen on biogas combustion for homogeneous charged compression ignition (HCCI) engines. The target engine specifications were a 2300cc displacement volume, 13:1 compression ratio, 15kW of electricity, and 1.2 bar boost pressure. The engine speed was fixed to 1800rpm. By varying the excess air ratio and hydrogen contents, the cylinder pressure, nitric oxide, and carbon dioxide were measured as a function of the hydrogen contents. According to preliminary studies related to the reaction mechanism for methane combustion and oxidation, a GRI 3.0 mechanism as the base mechanism was selected for HCCI combustion calculations describing the detailed reaction mechanism. By adding hydrogen, NO was increased while $CO_2$ was decreased. The cylinder pressure was also increased, having advanced timing for the maximum cylinder pressure and pressure rise region. Furthermore, lean operation limits were extended by adding hydrogen to the HCCI engine.