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首页> 外文期刊>Case Studies in Thermal Engineering >Sustained effect of dry water in a thermal environment after fire extinguishing: Fuel surface coating methods
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Sustained effect of dry water in a thermal environment after fire extinguishing: Fuel surface coating methods

机译：灭火后热环境中干水的持续影响：燃料表面涂料方法

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The elimination of heat and smoke hazards during the polymer combustion process is still challenging. In this work, we created a thermal environment using a fire propagation apparatus (FPA) and studied the sustained effect of dry water coated on the surface of polymer materials after fire extinguishing. The tests indicated an effective burnback delay and the reduction of heat and smoke hazards. This approach significantly increased the ignition time and reduced the heat release rate and the smoke and carbon monoxide production rate compared to fuel without dry water coating. The radiation intensity influenced the sustained performance of dry water, i.e., the larger the radiation intensity, the worse sustained performance. The sustained performance was also improved by using an aqueous solution as inner material. A low mass fraction of the aqueous solution yielded an improved sustained performance in the initial combustion stage. Furthermore, the gelation of dry water with the inner aqueous solution could balance the structural strength and the thermal shielding performance. These results have implications for designing a technical program toward longer escape and rescue times for stranded persons and firefighters.
机译：在聚合物燃烧过程中消除热量和烟雾危险仍然具有挑战性。在这项工作中，我们使用火力传播装置（FPA）创造了热环境，并研究了在灭火后涂覆在聚合物材料表面上的干水的持续效果。该测试表明了有效的燃料延迟和减少热量和烟雾危险。与没有干水涂层的燃料相比，这种方法显着增加了点火时间并降低了热释放速率和烟雾和一氧化碳生产速率。辐射强度影响了干水的持续性能，即辐射强度越大，较差的持续性能。通过使用作为内部材料的水溶液还改善了持续性能。水溶液的低质量分数在初始燃烧阶段产生了改善的持续性能。此外，用内水溶液的干水凝胶化可能平衡结构强度和热屏蔽性能。这些结果对设计技术方案朝着滞留者和消防员的逃避和救援时间设计有影响。

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