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목재용 오일 마감재(오일스테인) 자연발화 위험성에 관한 연구
김치상,김홍묵,권오승,이광희 한국화재감식학회 2022 한국화재감식학회 학회지 Vol.13 No.2
Recently, as natural interiors have been in the spotlight, there is a trend to produce and assemble interior accessories using wood or bark. For small items made in this way, an oil finishing material for wood must be used, and the most used currently is oil stain. Linseed oil, which is classified as a drying oil among vegetable oils, is used as the main ingredient in oil stain. Linseed oil, which is a drying oil, consists of unsaturated fatty acids, and many of them are composed of polyunsaturated fatty acids, so it oxidizes very quickly in the air. Because of these properties, there is a risk of spontaneous ignition due to oxidative heat in the process of improperly processing the painting tools generated after wood painting. Therefore, this study analyzes fire cases that occurred at the fire site, and based on this, deduces the possibility of spontaneous ignition due to oxidative heat in painting tools with oil stains through a re-enactment experiment, and suggests considerations for fire detection and fire prevention measures.
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차승환,강경원,김홍묵,김치상 한국화재감식학회 2018 한국화재감식학회 학회지 Vol.9 No.3
Sine most of the site identification for fire investigation is carried out through the eyes and judgement of investigators, they might make a mistake in determining the cause of a fire. This study aims to introduce an engineering theory into the site identification to determine the cause of a fire by means of a scientific and empirical method. To be specific, it was used Heskestad's formula and FDS to compare the combustion type and characteristics of combustibles with the flame height whether or not oil combustion improver was used in the inside fire of a compartment. The study result is as follows. First, Heskestad's formula, which calculates a flame height, could be used to derive the minimum heat release rate (Q) from the flame height and the diameter of combustibles when the flame reaches to the ceiling. Then, the ingredients of combustibles on the floor could be understood to determine whether the flame reaches to the ceiling by the heat release rate of combustibles themselves or the third fuel is involved. Second, the diameter of combustibles was classified to compute the heat release rate, and then Heskestad's formula was used to predict the flame height. Third, for gasoline, the flame height was represented as 2.28m when the floor area was 0.22㎡. Therefore, in case of fire, it needs to check the combustion type of the ceiling as well as the floor and determine whether or not oil is used through an ingredient analysis. Finally, problems and implications of this study were discussed.
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