The extinction of hydrocarbon flames based on the heat-absorption processes which occur in them

摘要: An empirical relation has been developed which correlates and predicts the fire-suppression effectiveness of a wide variety gaseous, liquid solid agents. The flame-extinguishment model is based on premise that extinction dominated by heat-absorption processes flame extinguished when sufficient heat removed extinguishant to reduce temperature limit value. This minimum at effective rate combustion reactions maintain flamepropagation, it depends in predictable way properties suppressant system. heat-balance equation describing this derived two stages. In first, preliminary obtained considering only those substances are thermally stable act as heat-capacity sinks. second, generalized consideration all endothermic reaction sinks, e.g. vaporization, dissociation decomposition. general most data found literature. results suggest for extinguishing capacity related heat-extraction many effects previously attributed chemical mechanisms may be thermodynamic nature rather than kinetic.