드라이워터의 입자크기가 소화성능에 미치는 영향 = Effects of Particle Size of Dry Water on Fire Extinguishing Performance

다국어 초록 (Multilingual Abstract)

Dry water is a core-shell structured powder which comprises a very fine water core covered with hydrophobic silica particles. Recently, the dry water has attracted attention as a new type of fire extinguishing agents. However, characteristics of the dry water as a fire extinguishing agent have not been revealed until now. To our best knowledge, this is the first work to uncover effects of particle size of the dry water on the fire extinguishing performance. Pristine dry water, which has heterogeneous particle size distribution, was carefully separated by sieving method into three fractions which were a small size (ca. 110 ㎛) fraction, a medium size (ca. 220 ㎛) fraction and a large size (ca.
400 ㎛) fraction. Microscopic observations confirmed the effective separation of dry water’s particle size. In extinguishing tests of wood cribs fire, the medium size dry water showed most excellent fire extinguishing performance, as compared to other dry waters having small (ca. 110 ㎛) and large (ca. 400 ㎛) particle size. The good performance of the medium size (ca. 220 ㎛) dry water may be attributed to the balance between cooling effect of the water core and smothering effect of the silica particles. It is also revealed that small size dry water has poor flowability than large size dry water.

참고문헌 (Reference)

1 조중래, "화학물질 소화약제 안전한 사용에 관한 연구" 한국화재소방학회 32 (32): 118-129, 2018

2 김민형, "증점제를 함유한 미분무수의 목재화재 소화효과" 한국안전학회 29 (29): 78-84, 2014

3 김승일, "미분무수 첨가제의 소화효과 비교" 한국안전학회 28 (28): 23-28, 2013

4 O. Taylan, "Thermal Radiation Transport in a Fluidized Dry Water System" 120 : 104-113, 2018

5 A. Chattaway, "The Development of a Small Scale Class A Fire Test" 498-508, 1997

6 "Technical Overview Brochure: AEROSIL - Fumed Silica"

7 L. Forny, "Storing Water in Powder Form by Self-assembling Hydrophobic Silica Nanoparticles" 171 (171): 15-24, 2007

8 M. Hu, "Sensing Ammonia using Dry Waters Containing Cupric Chloride Solution" 414 : 216-219, 2012

9 "Safety Data Sheet AEROSIL R812S"

10 E. Bormashenko, "Revealing of Water Surface Pollution with Liquid Marbles" 255 (255): 6429-6431, 2009

11 B. O. Carter, "Pausing a Stir : Heterogeneous Catalysis in Dry Water" 12 (12): 783-785, 2010

12 F. Farhang, "Non-destructive High-resolution X-ray Micro Computed Tomography for Quantifying Dry Water Particles" 25 (25): 1195-1204, 2014

13 Z. Han, "Newtype Gel Dry-water Extinguishants and Its Effectiveness" 166 : 590-600, 2017

14 L. Forny, "Influence of Mixing Characteristics for Water Encapsulation by Self-assembling Hydrophobic Silica Nanoparticles" 189 (189): 263-269, 2009

15 H. W. Park, "Historical Trend and Prospect of Gas Suppression Agent Market" 55-56, 2017

16 R. Carr, "Evaluating Flow Properties of Solids" 18 : 163-168, 1965

17 K. Saleh, "Dry Water : From Physico-chemical Aspects to Process-related Parameters" 89 (89): 537-544, 2011

18 R. Dawson, "Dry Bases_Carbon Dioxide Capture using Alkaline Dry Water" 7 (7): 1786-1791, 2014

19 X. Ni, "Application of Water@silica Core-shell Particles for Suppressing Gasoline Pool Fires" 341 : 20-27, 2018