环境温度及水平安装位置对感烟型火灾探测器响应性能影响的研究

Study on Effect of Environment Temperature and Setting Position in the Horizontal Direction on the Alarm Response Time of Smoke Detectors

用FDS软件研究了环境温度和水平安装位置对感烟型火灾探测器报警时间的影响。通过在水平方向上设置多组感烟型火灾探测器,对比分析了0℃、10℃3、0℃的环境温度下,不同位置感烟探测器报警时间的差异和规律性。研究表明:主要受火源正上方羽流烟气和远端壁面回流烟气影响的探测器的报警时间随环境温度的升高有提早报警的趋势;主要受近端壁面回流烟气影响的探测器的报警时间随环境温度的升高有滞后报警的趋势;三个环境温度下位于火源正上方羽流中心的探测器的报警时间最早,且报警时间相同。

The article uses FDS to study the effect of environment temperature and setting position on the alarm time of smoke detectors. The differences and laws of alarm response time of smoke detectors set in different positions with environment temperature of 0℃, 10℃ and 30℃ respectively are analyzed by using several groups of smoke detectors set in the horizontal direction. Research shows that the smoke detectors which are affected mainly by the plume smoke above the fire or the regurgitation smoke from farther wall have a trend of earlier Manning with the environment temperature going up ; the smoke detectors which are affected mainly by the regurgitation smoke from nearer wall have a trend of later alarming with the environment temperature going up; the smoke detector above the fire alarms earliest and has the same alarm time no matter which environmental temperature of that three is present.