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The Application of and Research on Water Mist Fire Extinguishing System in a Subway

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Tutor: GuPing;ChenXin
School: Tianjin University
Course: Environmental Engineering
Keywords: rail transit,gas fire extinguishing system,water mist system,mistdiameter,high p
CLC: U231.96
Type: Master's thesis
Year:  2012
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In recent years the fine water mist system in domestic began to be applied£¬ thetechnology was gradually mature£¬ its application in subway has received more andmore attention. Tianjin railway station underground transportation hub project£¬ is therail transit2£¬3£¬9line transfer hub£¬ and at the same time is urban rail transportationand national railway system transfer hub. The application of water mist technology toreplace the traditional gas fire extinguishing system in such a large scale undergroundproject£¬ is of undoubtedly significant from the scale effect. Combining with theTianjin station integrated transport hub¡¯s characteristics£¬ the fire risk of electricalequipment in a underground large space public building was analyzed£¬ the feasibilityof high pressure water mist system application and the design procedure was studied.The work developed a fire protection system for electrical equipment room in thecomprehensive transportation hub. The new system is more energy-saving£¬environmental friendly and economical.Referring to the experience of foreign similar engineering£¬ collecting andsummarizing literature at home and abroad and standard related£¬ the paper putforward the appropriate application mode of high pressure water mist system inTianjin Railway Station hub. At the same time£¬ in order to verify the extinguishingmechanism of water mist system£¬ fire extinguishing ability£¬ the applicationfeasibility to electrical fire£¬ and the application mode in the subway project£¬ theblocking radiant heat experiment£¬ electrical safety experiment£¬ electrical insulationexperiment£¬ and concentration of toxic smoke in subway fire experiment werecarried out. Through analyzing the test data and the experience of Tianjin RailwayStation hub£¬ the application of water mist system in engineering project wasconducted and studied.
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