Various methods of flame extinguishing by CO2 hydrate
| Parent link: | Fire Safety Journal.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 158.— 2025.— Article number 104567, 11 p. |
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| Sumari: | Title screen Extinguishing the flame of wooden samples by various means: CO2 hydrate tablet, CO2 hydrate powder, sand, NH4H2PO4, water spray, foam spray (water and SDS) was studied experimentally and theoretically. The experiments were performed both outdoors and in a closed chamber. The tablet and the CO2 hydrate powder have shown the minimum sample weight for complete quenching. The novelty of the research lies in the use of shells with tablets to extinguish a fire in a closed room (chamber). Previous studies were carried out with the CO2 hydrate powder. The presented work shows the advantages of using CO2 hydrate tablets. Experiments were performed for different sample masses and in a wide range of closed chamber volumes. After the projectile throw into the chamber, three characteristic modes are realized: heating and dissociation of tablets, rupture of the shell and instantaneous release of CO2, and longer dissociation of CO2 hydrate tablet. It is shown that extinguishing in the open air is realized mainly due to the heat of phase transitions. In a closed room, the predominant extinguishing effect is associated with very rapid release of CO2 gas and rapid suppression of oxygen and oxidation reactions. The dissociation of a gas hydrate tablet, the tablet heating time until the shell break, and the maximum dissociation time of the tablet are simulated. A technique of multi-cycle quenching with a delay in the time of rupture of several shells is proposed Текстовый файл AM_Agreement |
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2025
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| Accés en línia: | https://doi.org/10.1016/j.firesaf.2025.104567 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684378 |