感温火灾探测器预警时间的传热分析

Analysis of Heat Transfer during the Response Time of Temperature Sensor Fire Detector

分析了感温火灾探测器的传热机理 ,建立了考虑辐射传热影响的数学模型 ,并经数值积分获得了求解预警时间的一种新算法。计算表明 :当环境温度较低 ,而探测器的响应温度设置过高时 ,辐射传热对预警时间的影响不应忽略。本文对消防工程的安全评估及报警系统的选型设计具有一定的参考价值。

This paper analyzes the heat transfer principle of temperature sensor fire detector, establishes mathematical model of heat transfer with considering the effect of radiation heat transfer and presents a new calculation method for the response time. The results of calculation show that when the environment temperature is rather low and the response temperature is set higher, the effect of radiation heat transfer on response time shouldn't be neglected. This paper may be helpful in appraising fire safety and designing alarm system.