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A Study on Response Characteristics of ionization Smoke Detector Influenced by Air Stream  

이복영 (한국화재보험협회 부설 방재시험연구원)
정길순 (충북대학교 안전공학과)
이병곤 (충북대학교 안전공학과)
Publication Information
Fire Science and Engineering / v.17, no.2, 2003 , pp. 6-9 More about this Journal
Abstract
Recently, forced ventilating air conditioning system has been widely used in modern buildings. However, It is obvious that this kind of system may affect on the response of fire detectors at real fire incidents, especially, on the ionization smoke detector, which is critically influenced by air stream. Therefore we studied to verify the response characteristics of air stream by ionization smoke detector for the design of facilities in practice. In this study, experiments were executed to examine the correlation between air velocity and the ionization detector's responses with var-ious air velocity and smoke densities in the simulated test room. As a result of experiments, ionization detector's operating time is in reverse proportion to air velocity. And the detector shows more sensitive reaction when the velocity of smoke stream increase over 60 cm/s. In addition, it was shown that ionization smoke detector is more sensitive to smoldering fires in paper than that in petro-chemicals.
Keywords
ionization; Smoke stream; Responsiveness; Smoldering fire;
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