主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (5): 675-680.

• • 上一篇    下一篇

地下封闭空间液氮灭火效能试验研究

于海1,2, 刘振国1,2, 秦志敏1,2, 章新涛3   

  1. （1. 国网新疆电力有限公司电力科学研究院，新疆 乌鲁木齐 830011；2. 新疆输变电设备极端环境运行与检测技术重点实验室，新疆 乌鲁木齐 830011；3. 国网新疆电力有限公司，新疆 乌鲁木齐 830063）
  • 出版日期:2023-05-15 发布日期:2023-05-15
  • 作者简介:于 海（1987- ），男，河北唐山人，国网新疆电力有限公司电力科学研究院工程师，硕士，主要从事电力安全技术研究、电力安全性评价技术研究，新疆乌鲁木齐高新技术产业开发区（新市区）恒达街200号，830011。

Experimental study on liquid nitrogen fire extinguishing efficiency in underground enclosed space

Yu Hai1,2, Liu Zhenguo1,2, Qin Zhimin1,2, Zhang Xintao3   

  1. (1. State Grid Xinjiang Electric Power Research Institute, Xinjiang Urumqi 830011, China;2. Xinjiang Key Laboratory of Extreme Environment Operation and Testing Technology for Power Transmission & Transformation Equipment, Xinjiang Urumqi 830011, China; 3. State Grid Xinjiang Electric Power Co.,Ltd., Xinjiang Urumqi 830011, China)
  • Online:2023-05-15 Published:2023-05-15

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摘要： 为研究注氮距离对地下封闭空间液氮灭火效能的影响，以地下管廊为例，建立液氮灭火效能评价体系，通过变参数液氮灭火试验，基于火焰、温度、氧气体积分数对液氮灭火效能进行量化分析与评价。结果表明：水平注氮距离增加会导致液氮的瞬间抑制效果减弱。灭火时间随注氮距离增加几乎均匀线性增加，但温度降至可控阶段的时间受影响程度则逐渐减小。灭火效能会随注氮距离的改变产生规律性变化，然而，当注氮距离大于3 m，注氮距离的改变对灭火效能的影响减弱。

关键词: 地下封闭空间, 地下管廊, 液氮, 灭火效能

Abstract: In order to study the effect of nitrogen injection distance on the fire extinguishing efficiency of liquid nitrogen in an underground enclosed space, an underground pipe gallery was taken as an example to establish a liquid nitrogen fire extinguishing efficiency evaluation system. Through liquid nitrogen fire extinguishing tests, quantitative analysis and evaluation of liquid nitrogen fire extinguishing efficiency based on flame, temperature and oxygen volume fraction were made. The results show that the increase of the horizontal nitrogen injection distance will lead to the weakening of the instantaneous inhibitory effect of liquid nitrogen. The fire extinguishing time increases almost uniformly and linearly with the increase of the nitrogen injection distance, but the influence degree of the time when the temperature drops to the controllable stage gradually decreases. The fire extinguishing efficiency will change regularly with the change of the nitrogen injection distance. However, when the nitrogen injection distance is greater than 3 m, the influence of the change of the nitrogen injection distance on the fire extinguishing efficiency is weakened.

Key words: underground enclosed space, underground pipe gallery, liquid nitrogen, fire extinguishing efficiency