Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Analysis of the Response Time of a Photoelectric Spot-Type Smoke Detector Depending on the Type of Fires

화원에 따른 광전식 연기감지기 반응시간 분석

  • 지승욱 (영남대학교 공학대학원)
  • Received : 2013.03.04
  • Accepted : 2013.04.14
  • Published : 2013.05.31
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Abstract

The fire testing performed for smoke detector model approval in Korea tests only one kind of fire smoke. A photoelectric spot-type smoke detector using Mie scattering is affected by the wavelength of light beam and the particle diameter. According to UL (Underwriters Laboratories Inc.) 268 standard, this paper analyze the characteristic of the response for a photoelectric spot-type smoke detector on sale in Korea using various fire smokes. Probability that the response time is included in non-defective range is 100% in paper fire, 90% in wood fire and 75% in flammable liquid fire, 90% in wood fire and 75% in flammable liquid fire. According to the estimation for population mean of the response time choosing a confidence level of 99%, a maximum of 19% for wood fire and that of 38% for flammable liquid fire are defective. As the result of analysis of smoke particle, this paper is found that these results are caused by the smoke particles are wide variations in size or have very black.

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References

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Cited by

  1. Analysis of Optical Properties of Fire Smoke and Non-fire Smoke for Reduction of Nuisance Alarm vol.28, pp.10, 2014, https://doi.org/10.5207/JIEIE.2014.28.10.049
  2. Optical Properties for Smoke Particles of Fire Sources According to UL 268 vol.28, pp.2, 2014, https://doi.org/10.7731/KIFSE.2014.28.2.009