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首页> 外文期刊>Journal of Cleaner Production >Assessment of a clean and efficient fire-extinguishing technique: Continuous and cycling discharge water mist system
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Assessment of a clean and efficient fire-extinguishing technique: Continuous and cycling discharge water mist system

机译：评估清洁高效的灭火技术：连续和循环排放的水雾系统

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As the succedaneum of halon extinguishing agent, water mist is absolutely green, harmless, and sustainable which does not cause the ozone depletion. In order to investigate the fire extinguishment performance of water mist system with both continuous and cycling discharge modes, a series of full-scale pool fire suppression experiments (including gasoline and diesel) with the two discharge modes were conducted in a confined compartment (3 m x 3 m x 3 m) under different mechanical exhaust rates. Some characteristic parameters, such as the smoke temperature, radiative and total heat flux, fire extinguishing time, and carbon monoxide and oxygen concentration under the influences of both water mist and mechanical ventilation, were obtained, and their variation mechanisms were analyzed in detail. The experimental results show that pool fires could be extinguished more quickly using cycling water mist with shorter turn-off time. The reduction coefficient of carbon monoxide concentration increases exponentially, while the extinguishing time of both gasoline and diesel pool fires decreases first and then increases with the ventilation rate. With cycling discharge mode, the smoke temperature and heat flux both fluctuate with alternate activation of water mist. The application of cycling discharge mode substantially improves the fire suppression efficiency, especially in the condition that the pool fire is difficult to extinguish utilizing continuous discharge mode. The cycling discharge water mist system can be applied in some ventilated spaces when mechanical ventilation is unavoidable, and is helpful for personnel security and evacuation. (C) 2018 Elsevier Ltd. All rights reserved.
机译：作为哈龙灭火剂的成功之举，水雾绝对是绿色，无害且可持续的，不会造成臭氧消耗。为了研究连续排放和循环排放两种模式下水雾系统的灭火性能，在密闭隔间（3 mx）中进行了两种排放模式的全尺寸池灭火实验（包括汽油和柴油）。 3 mx 3 m）在不同的机械排气速率下。得出了烟气温度，辐射和总热通量，灭火时间以及在水雾和机械通风的影响下的一氧化碳和氧气浓度等一些特征参数，并详细分析了它们的变化机理。实验结果表明，使用循环水雾和更短的熄火时间可以更快地扑灭池火。一氧化碳浓度的降低系数呈指数增加，而汽油和柴油池火的扑灭时间则先减少，然后随通风速率增加。在循环排放模式下，烟雾温度和热通量都会随着水雾的交替激活而波动。循环放电模式的应用大大提高了灭火效率，特别是在使用连续放电模式难以扑灭水池火的情况下。当不可避免要进行机械通风时，可以将循环排放水雾系统应用于某些通风空间，这有助于人员安全和疏散。 （C）2018 Elsevier Ltd.保留所有权利。

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