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 ›› 2024, Vol. 43 ›› Issue (8): 1128-1131.

• • 上一篇    下一篇

不同发泡方式下泡沫对溶剂油蒸气密封性能研究

靖立帅1, 2, 3, 包志明1, 2, 3, 陈旸1, 2, 3, 胡成1, 2, 3   

  1. (1. 应急管理部天津消防研究所,天津 300381;2. 工业与公共建筑火灾防控技术应急管理部重点实验室,天津 300381;3. 天津市消防安全技术重点实验室,天津 300381)
  • 收稿日期:2023-12-18 修回日期:2024-01-15 出版日期:2024-08-19 发布日期:2024-08-15
  • 作者简介:靖立帅(1988- ),男,河南新乡人,应急管理部天津消防研究所助理研究员,硕士,主要从事灭火剂及灭火技术研究,天津市南开区卫津南路110号,300381,jinglishuai@tfri.com.cn。
  • 基金资助:
    基金项目:国家重点研发计划课题(2022YFC3004902);天津市应用基础多元投入基金项目(22JCQNJC01740);所级自有资金支持项目(2022SJZYZJ05)

Study on sealing performance of foam to solvent oil vapor under different foaming methods

Jing Lishuai1, 2, 3, Bao Zhiming1, 2, 3, Chen Yang1, 2, 3, Hu Cheng1, 2, 3   

  1. (1. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 2. Key Laboratory of Fire Protection Technology for Industry and Public Building, Ministry of Emergency Management, Tianjin 300381, China; 3. Tianjin Key Laboratory of Fire Safety Technology, Tianjin 300381, China)
  • Received:2023-12-18 Revised:2024-01-15 Online:2024-08-19 Published:2024-08-15

摘要: 基于美国环境保护署通量室试验模型,在压缩空气泡沫产生方式下探究了发泡倍数、泡沫厚度、泡沫析液时间等因素对合成型泡沫灭火剂密封性能的影响,进一步对比研究了压缩空气泡沫和吸气式泡沫的密封性能,明确了泡沫密封性能影响作用机制。结果表明:在压缩空气泡沫产生方式下,合成型泡沫灭火剂的泡沫稳定性并未随发泡倍数增加而持续增强;泡沫中液膜对油蒸气的抑制是泡沫密封性能的重要作用机制,发泡倍数越低泡沫中液体含量越高,对油蒸气密封性能越强,建议优先使用10倍以下泡沫处置120#溶剂油泄漏事故;同一倍数条件下压缩空气泡沫稳定性较高,液体含量高于吸气式泡沫,密封性能优于吸气式泡沫。

关键词: 发泡倍数, 泡沫厚度, 通量室, 爆炸极限, 压缩空气泡沫

Abstract: The efficacy of fine water mist as a cooling medium has garnered acclaim for its superior performance in mitigating thermal runaway phenomena within lithium-ion batteries. This investigation comprehensively evaluates the role of heat dissipation from safety valve-released gases and assesses the suppressive effects of fine water mist on the progression of thermal runaway at various stages. The study meticulously analyzes the thermal dynamics throughout the thermal runaway event, elucidating the kinetic principles that underpin the interaction between the battery flame and the fine water mist. The salient findings from this research are as follows: A critical threshold of accumulated heat density is identified, beyond which the fine water mist's cooling effect fails to inhibit thermal runaway, although it substantially diminishes the cooling duration post-thermal runaway; The initiation of thermal runaway is accompanied by a dynamic interaction with the fine water mist, which is observed to alter the flame's morphology and to increase the interfacial pressure significantly. This research introduces a novel cooling efficacy factor that quantifies the equilibrium state between the fine water mist and the thermal runaway flame, providing a nuanced assessment of the cooling strategy's effectiveness.

Key words: lithium-ion batteries, fine water mist, thermal runaway, accumulated heat density, cooling