2005, Volume 7, Issue 11
Strategic Study of CAE >> 2005, Volume 7, Issue 11
The Influence of Flow Velocity on Response Sensitivity of Smoke Detectors
1. State Key Laboratory of Fire Science , USTC , Hefei, 230027, China
2. China Center for Public Safety Research, Tsinghua University, Beijing 100084, China
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Abstract
The objective of the work was to evaluate the performance of photoelectric and ionic smoke detectors at different flow velocities through the Fire Emulator/Detector Evaluator ( FE/DE). That was accomplished through a series of experiments at different flow velocity, with the same smoldering cottons put directly at the entrance of the FE/DE and in box, respectively. The experiment results indicate that the sensitivity of the two kinds of smoke detectors decreases sharply while the flow velocity around them increases, with the smoldering cottons in the box. However, for the smoldering cottons at the entrance of FE/DE, the sensitivity of the ionic smoke detector does not fall down as sharply as the photoelectric detector. In this case, ionic detectors show better sensitivity than the photoelectric ones. Accordingly, the ionization smoke detector is more suitable for those locations with high flow velocity.
Keywords
flow velocity ; smoke detectors ; smoke particle ; size distribution of particles
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References
[ 1 ] 霍然, 胡源, 李元洲.建筑火灾安全工程导论[M].合肥:中国科学技术大学出版社, 1999.32 link1
[ 2 ] 袁宏永, 谢启源, 苏国锋, 等.一种火灾探测综合模拟检测装置[P].中国专利:ZL 02219803.2, 2003-01-01
[ 3 ] 谢启源, 詹福如, 苏国锋, 等.火灾探测综合模拟实验平台[J].火灾科学, 2002, 11 (2) :98~102 link1
[ 4 ] Xie Qiyuan, Yuan Hongyong, Guo Huiliang.Experimental analysis on false alarms of fire detectorsby cooking fumes[J].Journal of Fire Sciences, 2004, 22 (4) :325~338
[ 5 ] GB4715-93.点型感烟火灾探测器技术要求及试验方法[S]
[ 6 ] Lee T G K, Mulholland G.Physical properties ofsmoke pertinent to smoke detector technology[R].Washington D C:National Bureau of Standards, 1977.NBSIR 77-1312
[ 7 ] Qualey J R, Desmarais III L, Pratt J.Response-time comparison of ionization and photoelectric/heatdetectors[A].International conference on automaticfire detection“AUBE’01”12th proceedings[C].Gaithersburg, MD:National Institute of Standardsand Technology, 2001.283~299
[ 8 ] GB50116-98.火灾自动报警系统设计规范[S]
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