Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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An Investigation on the Thermal Characteristics of Heat-Responsive Element of Sprinkler Head

스프링클러헤드 감열부의 열적 특성에 관한 연구

  • You, Woo-Jun (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Moon, Hyo-Jun (Dept. of Mechanical Engineering, Chung-Ang Univ.) ;
  • Youm, Moon-Cheon (Dept. of Test & Certification, Korean Fire Institute of Industry & Technology) ;
  • Ryou, Hong-Sun (Dept. of Mechanical Engineering, Chung-Ang Univ.)
  • Received : 2012.04.13
  • Accepted : 2012.06.08
  • Published : 2012.06.30
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Abstract

In this study thermal characteristics of heat-responsive element considering conduction, convection and rate of change of element using Response Time Index (RTI) applied to sensitivity test of sprinkler head at home and aborad are theoretically investigated. Analytic solution of temperature distributions with radial direction and time is obtained form energy transport equations, non-homogeneous 2th order partial differential equation, applying to constant wall temperature and symmetric condition in order to analyze thermal characteristics of heat-responsive element for circular cylindrical geometry. Base on the results, the analytic method of this study is fundamental data to practical use for sensitivity test of sprinkler head and design of heat-responsive element.

본 연구에서는 국내외 스프링클러헤드 감도시험 기준에 적용하고 있는 반응시간지수(RTI, Response Time Index)를 사용하여 대류항과 전도항 그리고 시간 변화량을 고려한 감열부의 열전달 현상을 해석적으로 분석하였다. 원형 실린더 형상을 갖는 감열부의 열적 특성을 분석하기 위해서 비제차 2차 편미분 형태의 에너지 방정식을 사용하여 감열부 표면의 온도가 일정하고 대칭(Symmetric)인 경계조건을 적용하여 시간 증가에 대한 감열부의 반지름 방향 온도분포를 구하였다. 그 결과 본 연구의 감열부 열적 특성에 관한 분석 기법은 스프링클러헤드의 감도시험 및 감열부의 설계를 위한 자료의 활용이 가능할 것으로 판단된다.

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References

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