Study on the synergistic fire extinguishing efficiency of C6F12O/N2 mixed N2
In order to study the fire extinguishing efficiency of mixed gas-liquid flow of C6F12O/N2,developed a fire extinguish-ing concentration test device of mixed gas and a two-phase flow fire extinguishing concentration test device based on a scaled fire extinguishing model.Then measured the fire extinguishing concentration of C6F12O/N2 and the two-phase flow fire extin-guishing concentration of C6F12O after nitrogen atomization,and verified by full-scale fire extinguishing experiment.The results show that the fire extinguishing concentration of C6F12O gas and liquid after atomization is linearly positively correlated with the oxygen concentration.The scale fire extinguishing model can ac-curately measure the extinguishing concentration of liquid fire ex-tinguishing agent after atomization,and the deviation is less than 1.36% .Based on the two-phase flow spray scheme mixed with C6F12O/N2,the fire extinguishing concentration of C6F12O was re-duced by reducing the oxygen concentration in the protective space during the fire extinguishing process.At the same time,un-der the large-aperture nozzle,realized the low pressure,large flow atomization and rapid spray of C6F12O.Finally,through the physical fire experiment,the concentration and amount of C6F12O can be reduced by 27% under the fire extinguishing condition of 100 m3 total flooding.
perfluorohexanenitrogensynergistic fire extinguish-ingfire extinguishing concentrationtotal flooding test
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