• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.10a
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• pp.154-159
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• 2003

화학공장과 제조업 등의 사업장에서 발생하는 화재 및 폭발은 설비와 건물의 파괴뿐만 아니라 사업장의 근로자와 인근 주민에 대한 인명 피해까지 초래하는 경우가 많으므로 공정 안전을 위해 화재 및 폭발 분야의 연구에 많은 관심을 가져야 한다. 방화(Fire Protection) 및 방폭(Fire Protection)에 관련되는 특성치로 MSDS의 5번째 항목인 폭발화재시대처방법(Fire-fighting Measures)에서는 폭발(연소)한계(Explosive Limit 혹은 Flammability Limit), 인화점(Flash Point), 최소발화온도(AIT： Auto-ignition Temperature)가 제시되고 있다.(중략)

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.05a
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• pp.433-438
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• 2002

화재 및 폭발 특성치로 인화점, 최소발화온도, 폭발한계, 최소발화에너지, 연소열 등을 들 수 있다 이 가운데 폭발한계(explosive limits)는 가연성물질(가스 및 증기)을 다루는 공정 설계 시 고려해야 할 중요한 변수로써, 발화원이 존재할 때 가연성가스와 공기가 혼합하여 일정 농도범위 내에서만 연소가 이루어지는 혼합범위를 말한다/sup 1)/. 특히 폭발범위는 온도, 압력, 불활성가스의 농도, 화임전과 방향, 용기의 크기, 무리리적 상태 등에 의해 변한다/sup 2)/.(중략)

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.11a
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• pp.360-363
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• 2011

본 연구는 2-Propanol과 O-xylene의 혼합물의 인화점과 자연발화에 관한 연구이다. 인화점의 경우 2-Propanol과 O-xylene의 혼합비를 변화하여 측정하였으며, 2-Propanol은 $12^{\circ}C$를 구하였고, O-xylene는 $32^{\circ}C$를 구하였다. 자연발화의 경우 2-Propanol과 O-xylene의 농도를 변화시켜 혼합한 시료를 만들어 최저발화온도와 순간발화온도를 측정하였다.

• Fire Science and Engineering
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• v.25 no.6
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• pp.184-189
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• 2011

This study measured the AITs of n-butanol + n-decane system from ignition delay time (time lag) by using ASTM E659 apparatus. The AITs of n-butanol and n-decane which constituted binary system were $340^{\circ}C$ and $212^{\circ}C$, respectively. The experimental AITs of n-butanol + n-decane system were a good agreement with the calculated AITs by the proposed equations with a few A.A.D. (average absolute deviation).

• Journal of the Korean Institute of Gas
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• v.18 no.2
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• pp.35-40
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• 2014

For the safe handling of cyclopentanol, this study was investigated the explosion limits of cyclopentanol in the reference data. The flash points and AITs(auto-ignition temperatures) by ignition delay time were experimented. The lower flash point of cyclopentanol by using closed-cup cyclopentanol was experimented at $49^{\circ}C$. The lower flash points of cyclopentanol by using open cup tester was experimented at $59^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659 tester for cyclopentanol. The experimental AIT of cyclopentanol was at $363 ^{\circ}C$.

• Korean Chemical Engineering Research
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• v.56 no.4
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• pp.474-478
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• 2018

For process safety, fire and explosion characteristics of combustible materials handled at industrial fields must be available. The combustion properties for the prevention of the accidents in the work place are flash point, fire point, explosion limit, and autoignition temperature (AIT) etc.. However, the combustion properties suggested in the Material Safety Data Sheet (MSDS) are presented differently according to the literatures. The accurate combustion properties are necessary to safely treatment, transportation and handling of flammable substances. In the chemical industries, n-ethylaniline which is widely used as a raw material of intermediate products and rubber chemicals was selected. For safe handling of n-ethyl aniline, the flash point, the fire point and the AIT were measured. The lower explosion limit (LEL)of n-ethylaniline was calculated using the lower flash point obtained in the experiment. The flash points of n- ethylaniline by using the Setaflash and Pensky-Martens closed-cup testers measured $77^{\circ}C$ and $82^{\circ}C$, respectively. The flash points of n-ethylaniline using the Tag and Cleveland open cup testers are measured $85^{\circ}C$ and $92^{\circ}C$, respectively. The AIT of the measured n-ethyl aniline by the ASTM E659 apparatus was measured at $396^{\circ}C$. The LEL of n-ethylaniline measured by Setaflash closed-cup tester at $77^{\circ}C$ was calculated to be 1.02 vol%. In this study, it was possible to predict the LEL by using the lower flash point of n-ethylaniline measured by closed-cup tester. The relationship between the ignition temperature and the ignition delay time of the n-ethylaniline proposed in this study makes it possible to predict the ignition delay time at different ignition temperatures.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.04a
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• pp.530-535
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• 2010

본 연구에서는 한라산 산림 연료의 산불발생에 대한 위험성을 고찰하고자 16종의 고도별 분포수종 생엽을 대상으로 발화온도시험기와 콘칼로리미터 시험기를 이용하여 착화특성을 분석하였다. 함수율을 측정한 결과, 98~248% 정도의 범위 내에서 수종별로 차이가 나타났으며, 무염착화온도는 $251{\sim}383^{\circ}C$ 온도구간에서 수종별로 차이가 나타났다. 선정된 시료들 가운데 조릿대의 함수율과 발화온도가 가장 낮은 것으로 나타났다. 특히, 조릿대, 털진달래, 개서어나무들은 발염착화가 일어나는 것이 확인되었으며, 조릿대는 다른 수종들에 비해서 가장 빠른 시간에 착화가 일어나는 것을 알 수 있었다.

• Journal of Energy Engineering
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• v.23 no.4
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• pp.169-175
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• 2014

For the safe handling of ethylbenzene, this study was investigated the explosion limits of ethylbenzene in the reference data. And the lower flash points, upper flash points and AITs(auto-ignition temperatures) by ignition delay time were experimented. The lower flash points of ethylbenzene by using Setaflash closed-cup and Pensky-Martens closed-cup testers were experimented $20^{\circ}C$ and $22^{\circ}C$, respectively. The lower flash points ethylbenzene by using Tag and Cleveland open cup testers were experimented $25^{\circ}C$ and $28^{\circ}C$, respectively. Also, this study measured relationship between the AITs and the ignition delay times by using ASTM E659 tester for ethylbnezene. The experimental AIT of ethylbenzene was $430^{\circ}C$. The calculated LEL and UEL by using the measured lower flash point and upper flash point were 0.93 Vol.% and 7.96 Vol.%, respectively.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.34 no.7
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• pp.721-727
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• 2010

The spontaneous ignition of coal stockpile causes serious safety and economic problems. Such spontaneous ignition occurs in coal stockpile when the rate of heat released by the oxidation of coal is greater than the rate of heat lost to the surroundings. In this study, a two-dimensional unsteady model is adopted for studying spontaneous ignition and the numerical results are compared with experimental results. The numerical results are in a good agreement with the experimental ones. Depending on the porosity, the internal maximum temperature, pressure, and oxygen mass fraction during spontaneous ignition are investigated. On the basis of the numerical results, the transient temperature variations for several shapes of coal stockpiles are analyzed. Further, the physical mechanisms of hot-spot formation and spontaneous ignition are analyzed.

• Fire Science and Engineering
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• v.15 no.2
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• pp.1-5
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• 2001

We had investigated combustion properties of starch. Decomposition of starch scavenged by pre-cipitator of spinning factory with temperature were investigated using DSC and TGA. Combustion properties of starch according to amount were checked as temperature variation according to time using spontaneous ignition apparatus. Moreover, combustion properties with blowing or without blowing condition were checked in spontaneous ignition apparatus. As results of thermal analyses, increase in raising temperature causes initial smoldering temperature to move towards low temperature section. In addition, as amount of starch was increased, initial smoldering temperature was lowered. All of combustion forms were smoldering combustion. Initial smoldering temperature was low more slightly with blowing condition than without blowing condition in spontaneous ignition apparatus, which condition made heating value high.