Effect of fuel boiling point of pool flame for the flame extinction by CO2 hydrate

Akito Sugahara, Hirotaka Nakano, Takeshi Yokomori, Ryo Ohmura, Toshihisa Ueda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Experimental investigations to extinguish pool flames by CO2 hydrate powder and dry ice powder have been done. Methanol and 1-hexanol are used as a fuel of pool flames. The boiling point of the methanol, 67.4 °C, is lower than that of the water, while that of the 1-hexanol, 157 °C, is higher than that of the water. A variation in the flame shape to extinction is recorded by a high-speed video camera. Critical mass for extinction, which is defined as a minimum mass of fire extinguishing agent for extinction, extinction time, temperature variation in and above the fuel are measured. In the case of a methanol pool flame, more critical mass of CO2 hydrate is necessary compared to the dry ice to supply same mass of CO2 gas. This indicates that the supply of CO2 gas plays a key role to extinguish the methanol pool flame, which dilutes the methanol gas and weakens the mixing between methanol gas and air. In the case of 1-hexanol, less critical mass of CO2 hydrate is necessary compared to the dry ice. In this case, the water in CO2 hydrate dilutes and cools down the 1-hexanol which results in a decrease in the vaporization of the 1-hexanol.

Original languageEnglish
Title of host publicationASPACC 2015 - 10th Asia-Pacific Conference on Combustion
PublisherCombustion Institute
Publication statusPublished - 2015
Event10th Asia-Pacific Conference on Combustion, ASPACC 2015 - Beijing, China
Duration: 2015 Jul 192015 Jul 22

Other

Other10th Asia-Pacific Conference on Combustion, ASPACC 2015
CountryChina
CityBeijing
Period15/7/1915/7/22

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Chemical Engineering(all)
  • Condensed Matter Physics

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  • Cite this

    Sugahara, A., Nakano, H., Yokomori, T., Ohmura, R., & Ueda, T. (2015). Effect of fuel boiling point of pool flame for the flame extinction by CO2 hydrate. In ASPACC 2015 - 10th Asia-Pacific Conference on Combustion Combustion Institute.