Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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A Study on B Class Fire Extinguishing Performance of Air Ratio in the Compressed Air Foam System

압축공기포 소화설비의 공기포비에 따른 B급 소화성능 연구

  • Lee, Jang-Won (Korea Fire Institute of Industry & Technology) ;
  • Lim, Woo-Sub (Korea Fire Institute of Industry & Technology) ;
  • Rie, Dong-Ho (Fire Disaster Protection Research Center, University of Incheon)
  • Received : 2013.08.21
  • Accepted : 2013.12.06
  • Published : 2013.12.31
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Abstract

This research is to evaluate the fire extinguishing performance at a mixing ratio of pressurized air in the fire extinguishing system of compressed air foam (CAF) which injects compressed air into foam liquid and then discharging. The experimental device is made use of exclusive foam extinguishing facility for compressed air foam that is produces based on Canada National Laboratory and UL 162 standard, apply model of oil fire (B Class) 20 unit in accordance with "Standard of Model Approval and Product Inspection for Fire Extinguishing Agent" to the fire Extinguishing model. Compressed air is injected through the air mixture and study the tendency depending on increasing air foam ratio 1 : 4, 1 : 7, 1 : 10. In addition, the comparison experiments between synthetic surfactants foam and AFFF carry out with it at the air foam ratio 1 : 4. As a result, in the condition of same discharging flow, fire extinguishing effect of AFFF is the fastest at the air foam ratio 1 : 7 and the slowest at 1 : 10. Moreover, the fire extinguishing effect of AFFF in the comparison expeiments between AFFF and synthetic surfactants foam is faster than the other.

본 연구는 압축공기를 포수용액(수성막포 3%)에 주입하여 발포하는 압축공기포 소화설비에서 가압 공기 혼입 비율에 따른 소화성능을 평가하고자 하였다. 실험장치는 캐나다국립연구소 및 UL162 기준을 준용하여 제작한 압축공기포전용의 포소화설비 실험장치를 활용하였으며, 소화모형은 소화약제의 형식승인 및 제품검사의 기술기준에 의한 유류화재(B급) 20단위 모형을 적용하였다. 압축공기는 공기혼합기를 통하여 주입하였으며, 공기포비를 1 : 4, 1 : 7, 1 : 10으로 증가시키면서 경향성을 연구하였다. 또한 공기포비 1 : 4에서 합성계면활성제포와 수성막포의 비교 실험도 함께 진행하였다. 소화 성능실험 결과 동일한 방출유량 조건에서 수성막포는 공기포비 1 : 7에서 소화효과가 가장 빠르게 나타났으며 공기포비 1 : 10에서 가장 소화시간이 길게 나타났다. 또한 수성막포와 합성계면활성제포간 비교 실험에서는 수성막포의 소화효과가 더 빠르게 나타났다.

Keywords

References

  1. J. P. Asselin, G. P. Crampton, A. K. Kim and J. K. Richardson, "Compressed-Air Foam Fixed-Pipe Fire Suppression Systems", Fire Protection Engineering, pp. 1-10 (2007).
  2. W. S. Lim, S. H. Sakong, J. H. Jeong, J. S. Nam, D. G. Nam, Y. U. Na and K. H. Park etc., "A Study of Establishment on the Compressed-Air Foam System", Korean Institute of Fire Science & Engineering Fall Conference, pp. 506-509 (2011).
  3. A. Kim, "Evaluation of the Fire Suppression Effectiveness of Manually Applied Compressed-Air-Foam (CAF) System", Fire Protection Research Foundation Workshop (2012).
  4. J.-W. Lee, W.-S. Lim, S.-S. Kim and D.-H. Rie, "A Study on Fire Extinguishing Performance Evaluation of Compressed Air Foam System", Journal of Korean Institute of Fire Science & Engineering, Vol. 26, No. 5, pp. 73-78 (2012). https://doi.org/10.7731/KIFSE.2012.26.5.073
  5. A. Kim and George Crampton, "Compressed-Air-Foam (CAF) System for Fire Protection of Power Transformers", NRCC, pp. 1-6 (2002).
  6. A. K. Kim, G. P. Cramption and J. P. Asselin, "A Comparison of the Fire Suppression Performmance of Compressed-Air Foam and Foam-Water Sprinkler System for Class B Hazards", NRCC, pp. 2-25 (2004).
  7. NEMA Code 2012-57, "Approval of Type & Test Methods for Fire Extinguisher Agent" (2012).
  8. UL162, "Standard for Safety for Foam Equipment and Liquid Concentrates", Underwriters Laboratories, Northbrook, IL (1999).
  9. NFPA 11, "Standard for Low-, Medium-, and High-Expansion Foam", NFPA (2005).
  10. NEMA Code 2012-56, "Approval of Type & Test Methods for Fire Extinguisher" (2012).
  11. NEMA Code 2012-81, "Standard for Performance Certification & Product Inpection of Foam-Extinguishing-Agent Proportioner" (2012).