摘要
洒水喷头的热响应特性直接影响整个自动喷水灭火系统的效率,而喷头的响应时间不仅与喷头安装高度、响应时间指数、喷头距火源径向距离等参数有关,还受环境温度的影响。本文以环境温度对普通高度建筑中喷头响应时间的影响为研究对象,使用软件DETACT12计算得到不同场景下喷头的启动时间,并使用统计分析软件SPSS13.0进行分析,得出环境温度与喷头启动时间之间的关系式,并研究了综合考虑喷头响应时间指数、安装高度和环境温度影响的情况下,喷头启动时间的变化规律,研究结果表明,喷头启动时间随环境温度的升高而减小,环境温度越低,喷头的启动时间越长。在其他条件相同的情况下,喷头响应时间指数越大、安装高度越高,其启动时间受环境的影响越明显。
The present paper is to introduce our study findings on how the response characteristics of the sprinkler head may directly affect the efficiency of sprinkler system, and how the activation time of the sprinkler head is not only related with the installation height, response time index, horizontal displacement, but also with the ambient temperatures. Since the territory of our country covers a very wide latitude and the ambient temperatures vary greatly from the north to the south and from the city to the countryside. Significant differences in temperature are sure to have an impact on the response characteristics of sprinkler heads. Thus, the paper focuses itself on the influence of ambient temperatures on the activation time of sprinkler heads in different buildings. The software named DETACT 12 and statistical software known as SPSS 13.0 were adopted for calculating and analyzing the activation time of sprinkler heads. Particularly speaking, the following problems have been discussed in a detailed way in this paper： the relationship between the activation time of sprinkler heads and ambient temperatures, the changing regularities of sprinkler activation time under the synthetic effects of response time index, ceiling height and the ambient temperatures. Results of our study indicate that： the activation time of sprinkler tends to decrease with the increase of the ambient temperature. In other words, the lower the ambient temperature is, the longer the activation time of sprinklers would be. Moreover, other conditions unchanged, the influences of the ambient temperature on the activation ,time of sprinklers prove to be more significant with the increase of the response time index and the installation height of the sprinklers.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2009年第4期106-110,共5页
Journal of Safety and Environment
关键词
消防工程
环境温度
喷头
响应时间
统计分析
fire protection engineering
ambient temperature
sprinkler head
activation time
statistical analysis
