G060065 スプリンクラー設備による火炎からの輻射熱遮断効果について([G06006]熱工学部門一般セッション(6)二燃焼の分光計測および輻射)
詳細
Sprinkler equipment (hereinafter, SP) is installed in many building in accordance with Fire Services Law. It is well-known that SP has high performance for suppression. However, SP would have other effects expected in fire. For example, the cooling effect in compartment, the cooling effect on building structure and the reduction effect on radiant heat flux from fire. However, the influence of SP on radiant heat flux has not been researched. In this paper, the reduction effect of radiant heat flux through SP droplets was investigated by full-scale experiments. The fuels used for the study are n-heptane and ethanol. The experimental data indicates that infrared energy of fire is absorbed by SP droplets. And, it depends on size and total amount of SP droplets. Moreover, the reduction effect on radiant heat flux was calculated by the Mie theory. As the result, it was consistent with experimental data in case of ethanol fire. On the other hand, n-heptane fire did not agree with them. This is probably influenced by hot smoke layer including many soot particles generated by combustion.
