Experimental Study on Fire Suppression of the Outdoor Oil-Immersed Transformer by High-Pressure Water Mist System

Fire

article

Huaitao Song¹  Haowei Yao¹  Xiaoge Wei¹  Hengjie Qin¹  Youxin Li¹  Kefeng Lv¹  Qianlong Chen¹ 

[1] School of Building Environment Engineering, Zhengzhou University of Light Industry

关键词: oil-immersed transformer fire;    high-pressure water mist system;    fire suppression test;    burning characteristics;    similarity model;   

DOI  :  10.3390/fire6060238

学科分类：环境科学（综合）

来源: mdpi

【 摘 要 】

Fire accidents due to oil-immersed transformers seriously threaten the safe operation of power systems. In this paper, the similarity principle was used to design a high-pressure water mist fire-extinguishing test platform for a small-scale transformer fire, and the design method achieved a good fire extinguishing effect. The results indicate that a deflagration phenomenon, lasting about 2–4 s, could be observed after activating the high-pressure water mist system; the flame temperature rose rapidly at first, then dropped sharply, and finally cooled to the indoor temperature. The nozzle’s flow rate in this system has a significant impact on the fire extinguishing time. Meanwhile, the adjustment of the upper nozzle height also influenced the fire suppression effectiveness of the system, where a height of 1800 mm achieved the best performance compared to the others. In addition, the ambient wind speed is a very unfavorable factor for transformer fire suppression, where the fire extinguishing efficiency decreases rapidly with the increase in wind speed. Therefore, under low wind speed conditions, the high-pressure water mist system has great advantages in the fire suppression of outdoor oil-immersed transformers, and the above research results can provide a reference for the optimization design of this system.

【 授权许可】

CC BY