• Title/Summary/Keyword: 가연성액체량

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Measurements of Flame Temperature and Radiation Heat Flux from Pool Fire with Petroleum Diesel Fuel (디젤연료의 액면화재로부터 화염온도와 복사열 측정)

  • Lim, Woo-Sub;Choi, Jae-Wook
    • Fire Science and Engineering
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    • v.21 no.3
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    • pp.78-83
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    • 2007
  • Diesel, a kind of petroleum, which is used in vehicles, vessels, boilers etc causes great damage when a fire happens, because it has higher caloric value than gasoline or kerosene has at burning. Therefore, pool fire experiment was carried using diesel which is sold on the gas station and radiation heat flux that occurs from flame and inner temperature of flame at burning was estimated. The maximum instantaneous flame temperature of diesel was more than $900^{\circ}C$, and the average of maximum flame temperature was $800^{\circ}C$ which occurred at 0.5 H/D distance from the surface of inflammable liquid, the distance has more long that has the lower the temperature of flame. In case of radiation heat flux, it grew to vary according to the size and amount of sample. When the size of a container for experiment was 0.5 m and sample layer was 13 mm and 20 mm, the radiant heat was 92.29 kW and 117.43 kW each. When the container was 1.0 m, it was 364.35 kW and 405.88 kW each.

Design of Non-Flammable Electrolytes for Highly Safe Lithium-Ion Battery (리튬 이온전지의 안전성을 구현하기 위한 난연성 전해액의 설계)

  • Choi, Nam-Soon;Kim, Sung-Soo;Narukawa, Satoshi;Shin, Soon-Cheol;Cha, Eun-Hee
    • Journal of the Korean Electrochemical Society
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    • v.12 no.3
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    • pp.203-218
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    • 2009
  • The development of lithium-ion battery (LIB) technologies and their application in the field of large-scale power sources, such as electric vehicles (EVs), hybrid EVs, and plug-in EVs require enhanced reliability and superior safety. The main components of LIBs should withstand to the inevitable heating of batteries during high current flow. Carbonate solvents that contribute to the dissociation of lithium salts are volatile and potentially combustible and can lead to the thermal runaway of batteries at any abuse conditions. Recently, an interest in nonflammable materials is greatly growing as a means for improving battery safety. In this review paper, novel approaches are described for designing highly safe electrolytes in detail. Non-flammability of liquid electrolytes and battery safety can be achieved by replacing flammable organic solvents with thermally resistive materials such as flame-retardants, fluorinated organic solvents, and ionic liquids.