Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Evaporation Characteristics of a Water Droplet Containing Sodium Acetate Trihydrate as an Additive

첨가제로 아세트산 나트륨-3수화물을 함유한 물 액적의 증발 특성

  • Park, Jae-Man (Department of Safety Engineering, Chungbuk National University) ;
  • Shin, Chang-Sub (Department of Safety Engineering, Chungbuk National University)
  • Published : 2004.06.01
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Abstract

The evaporation phenomena of waterr droplet which has sodium acetate trihydrate($CH_3COONa{\cdot}3H_2O$) as a fire suppression additive were studied. Solutions of sodium salt up to 50% and heated stainless-steel surface were used in the experiment. The evaporation process was recorded using a charge-coupled-device camera at 120 frames per second. The average evaporation rate of the sodium acetate trihydrate soluation was lower than that of pure water at a given surface temperature and decreased with the concentration increase due to the precipitation of salt in the liquid film and change of surface tension. The variation of liquied film diameter was measured by time and it was increased by the hot surface temperature increase.

Keywords

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