Investigation of the Fire-Extinguishing Performance of Water Mist with Various Additives on Typical Pool Fires

ABSTRACTTo investigate the efficiency of water mist with additives on suppressing the typical pool fires including gasoline fire, diesel fire and transformer oil fire, a water mist generating system was employed to conduct a series of fire-extinguishing experiments. In this paper, the suppression effectiveness of the pure water mist was used to compare with the water mist containing additives, which comprises of KHCO3, carbamide, cocamidopropyl betaine and Capstone FS-1157. Meanwhile, the corresponding temperature characteristics and flame shape were measured and recorded. Results demonstrated that the fire-extinguishing performance of the water mist was improved significantly by containing additives. Wherein, the suppression efficiency of carbamide was higher than that of KHCO3 and surfactant because its decomposition reaction absorbed a large amount of heat, as a result, leading to reduction in the flame temperature. Also, the flame-retardant gases were generated and they can dilute oxygen concentration...