Interaction between water mist and fire smoke is studied by experiments in an ISO 9705 room, The variation of 02, CO and CO2 concentration is disclosed, and the mathematical models of smoke component con- centration w...Interaction between water mist and fire smoke is studied by experiments in an ISO 9705 room, The variation of 02, CO and CO2 concentration is disclosed, and the mathematical models of smoke component con- centration with water mist pressure and ventilation speed are established according to the experimental results. It is found in the experiment that the smoke component concentration will break when ventilation speed exceeds 1.5 kg/s. This paper provides necessary theory for water mist technology using in smoke restraining.展开更多
Water mist is one of the effective candidates for halon replacement used in electrical environment fire protec-tion. Water mist additives may greatly enhance fire suppres-sion effectiveness. In electrical environment,...Water mist is one of the effective candidates for halon replacement used in electrical environment fire protec-tion. Water mist additives may greatly enhance fire suppres-sion effectiveness. In electrical environment, electrical breakdown field strength (E) is one of the important factors that control the performance of electrical equipment. In this study the variation principles of electrical breakdown field strength and the electrical characteristics of MC additives were investigated by electrode discharging experiments. Ex-perimental results showed that electrical breakdown field strength was impacted obviously by the conductive metal ions and insulated fluorocarbon surfactants in MC additives. The attenuation percentages of E in different experimental cases were described, thus providing scientific guidance for the use of water mist and MC additives in electrical fire sup-pression.展开更多
基金National Natural Science Foundation Youth Science Foundation (No.50904041)China Postdoctoral Science Foundation (No.20070410067)
文摘Interaction between water mist and fire smoke is studied by experiments in an ISO 9705 room, The variation of 02, CO and CO2 concentration is disclosed, and the mathematical models of smoke component con- centration with water mist pressure and ventilation speed are established according to the experimental results. It is found in the experiment that the smoke component concentration will break when ventilation speed exceeds 1.5 kg/s. This paper provides necessary theory for water mist technology using in smoke restraining.
基金This work was supported by the China National Key Basic Research Special Funds(Grant No.2001CB409600)the National Natural Science Foundation of China(Grant No.50323005)the Anhui Development Fund of Person with Ability(Grant No.2003Z019).
文摘Water mist is one of the effective candidates for halon replacement used in electrical environment fire protec-tion. Water mist additives may greatly enhance fire suppres-sion effectiveness. In electrical environment, electrical breakdown field strength (E) is one of the important factors that control the performance of electrical equipment. In this study the variation principles of electrical breakdown field strength and the electrical characteristics of MC additives were investigated by electrode discharging experiments. Ex-perimental results showed that electrical breakdown field strength was impacted obviously by the conductive metal ions and insulated fluorocarbon surfactants in MC additives. The attenuation percentages of E in different experimental cases were described, thus providing scientific guidance for the use of water mist and MC additives in electrical fire sup-pression.
