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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental Study on Effectiveness of Water Mist Containing Potassium Salts in Extinguishing Liquid Pool Fire
The suppression efficiency of water mist with potassium salts additives on liquid pool fire is experimentally studied in an enclosed space. The penetration pool fire ratio (PPFR) has been utilized to investigate the penetration capability of water mist directly above a pool fire source. The PPFR is generated experimentally by measuring the water mass within the corresponding extinguishing time in the absence of a fire, and a critical PPFR range 40–45% is present, which means more than 45% droplets of water mist arrive at the fuel surface is the essential conditions for additives exerting a chemical effect. The suppression efficiency could be generally sorted in an order of KNO3 ≈ K2C2O4 > K3PO4 ≈ pure water. The chemical mechanism of potassium additives is due to the active substances KOH and KxOy formed at high temperature, and the enhancement effect of CO generated by K2C2O4 thermal decomposition under the volume of enclosed space is far greater than fire source can be ignored. All of the results indicate that the addition of potassium salts can improve the extinguishing efficiency of water mist on liquid fire, and the suppression mechanism is considered due to the combination of physical and chemical action.
Experimental Study on Effectiveness of Water Mist Containing Potassium Salts in Extinguishing Liquid Pool Fire
The suppression efficiency of water mist with potassium salts additives on liquid pool fire is experimentally studied in an enclosed space. The penetration pool fire ratio (PPFR) has been utilized to investigate the penetration capability of water mist directly above a pool fire source. The PPFR is generated experimentally by measuring the water mass within the corresponding extinguishing time in the absence of a fire, and a critical PPFR range 40–45% is present, which means more than 45% droplets of water mist arrive at the fuel surface is the essential conditions for additives exerting a chemical effect. The suppression efficiency could be generally sorted in an order of KNO3 ≈ K2C2O4 > K3PO4 ≈ pure water. The chemical mechanism of potassium additives is due to the active substances KOH and KxOy formed at high temperature, and the enhancement effect of CO generated by K2C2O4 thermal decomposition under the volume of enclosed space is far greater than fire source can be ignored. All of the results indicate that the addition of potassium salts can improve the extinguishing efficiency of water mist on liquid fire, and the suppression mechanism is considered due to the combination of physical and chemical action.
Experimental Study on Effectiveness of Water Mist Containing Potassium Salts in Extinguishing Liquid Pool Fire
Wu, Guan-Yuan (Herausgeber:in) / Tsai, Kuang-Chung (Herausgeber:in) / Chow, W. K. (Herausgeber:in) / Liu, Hao (Autor:in) / Zhang, Tianwei (Autor:in) / Xia, Dengyou (Autor:in) / Liang, Qiang (Autor:in)
Asia-Oceania Symposium on Fire Science and Technology ; 2018 ; Taipei, Taiwan
The Proceedings of 11th Asia-Oceania Symposium on Fire Science and Technology ; Kapitel: 47 ; 649-665
01.01.2020
17 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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