| Title |
Evaporation Cooling Phenomena of Droplets Containing Fire Suppression Agents |
| Keywords |
Evaporation cooling ; 증발냉각 ; Droplet ; 액적 ; Fire suppression agent ; 화제억제제 ; Apparent evaporation time ; 겉보기 증발시간 ; 증발 |
| Abstract |
Evaporation cooling phenomena of droplets containing fire suppression agents on a hot metal surface were experimentally investigated. Solutions of water containing potassium acetate (30∼50% by weight) and sodium bromide(10∼30% by weight) were used in the experiments, and surface temperatures were ranged from 70∼116℃. The evaporation time of the droplet on the heated surface was determined by using frame-by-frame analysis of the video records. It is found that the apparent evaporation time is shorter in turns of pure water, sodium bromide solution and potassium acetate solution. However, the time averaged heat flux is higher in turns of pure water, sodium bromide solution and potassium acetate solution. In-depth temperature variation of the hot metal does not occur significantly by the kinds of additive. |