摘要
为评估多组分细水雾灭火系统在强制通风条件下对油浸变压器火灾的灭火效能,通过数值模拟的方式,以110 kV变压器房、变压器、集油坑的尺寸建立变压器房几何模型,根据灭火系统的性能参数建立喷雾模型,基于灭火强度、热释放速率(HRR)和灭火时间之间的函数关系建立多组分细水雾灭火简化计算模型。对不同强制通风条件下变压器油火进行灭火模拟,并选取一种通风条件进行全尺寸110 kV变压器模型的灭火试验,验证模拟结果的准确性。研究表明,通风条件对灭火效果的影响不大,多组分细水雾灭火系统能有效抗风,并能在极限条件下有效保护变压器;数值模拟结果与试验所用灭火时间吻合。
In order to assess the fire extinguishing performance of poly-component water mist oil-immersed transformer fire extinguishing system under condition of forced ventilation, a geometry model was built for a certain 110 kV transformer room taken as an example, a water mist spraying model was built on basis of performance parameters of fire extinguishing system, and a simplified calculation formula was worked out for polycomponent water mist fire extinguishing system based on functional relation between fire extinguishing intensity, heat release rate （HRR） and fire extinguishing time. A simulation of extinguishing of oil-immersed transformer fire was made ＇under conditions of forced ventilation. The results of simulation indicate that ventilation has a very limited impact on fire extinguishing performance, the fire extinguishing system has a effective wind resistance capability, and it can protect the transformer effectively under ultimate condition. In order to evaluate the accuracy of simulation results, a fire extinguishing test was carried out with full scaled 110 kV transformer model. In respect of fire extinguishing time, the numerical simula- tion result matches the result of test.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2014年第8期43-48,共6页
China Safety Science Journal
基金
上海市科委重点科技攻关项目(09231202300)
关键词
多组分细水雾
油浸变压器
灭火模拟
强制通风
灭火试验
polycomponent water mist
oil-immersed transformer
fire extinguishing simulation
forced ventilation
fire extinguishing test
