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Journal of Korean Institute of Fire Science and Engineering 2006;20(4):135-142.
Published online December 31, 2006.
Positive Pressure Ventilator 경사각 변화에 의한 화염억제 효율과 연기농도 변화
김성원, 이경덕, 신창섭
1충북대학교 안전공학과2충북대학교 안전공학과3(주)거송시스템
Effect of Positive Pressure Ventilator Tilting Angle on the Flame Suppression and Smoke Density
Kim Sung-Won, Lee Kyoung-Duck, Shin Chang-Sub
요약
화재시 구조물 내부의 열 및 연기를 급속하게 배기시키기 위하여 Positive Pressure Ventilation 방식을 적용하였으며, 이의 적용에 따른 열 배출과 연기농도의 변화를 측정하였고, 송풍기의 경사각 등 송풍조건의 변화에 따른 영향을 측정하였다. 또한 화염억제 효율증대를 위하여 PPV에 미세물분무 시스템을 결합하여 열 배출과 구조물 내부 연기제거 효과를 측정하였다. PPV 방식의 적용에 따라 화염주위의 온도가 급격히 낮아졌으며, 경사각의 영향이 큰 것으로 나타났다. 화재시 발생되는 연기의 농도도 PPV의 적용에 의해 크게 감소시킬 수 있었으며, 본 실험에서는 경사각 $0^{circ}$에서 가장 높은 효율을 나타내었다. 한편, PPV와 함께 미세물분무를 적용한 경우 열 및 연기농도의 저감효과가 더욱 크게 나타났으며, 이 경우에도 경사각의 영향이 크게 나타났다.
Abstract
The experiment applied Positive Pressure Ventilation to rapidly exhaust heat and smoke inside the construction in the fire was done. Changes of heat discharge and smoke density were measured, with the various blowing condition like a fan tilting angle to find the effect of the parameter. Experimental apparatus were with PPV and water mist system for better efficiency, and investigate the effect of heat discharge and smoke removal. In the experiment, flame temperature has decreased when PPV was applied. Smoke density, generated from fire also decreased dramatically and the efficiency showed the highest rate at $0^{circ}$ tilting angle. In addition, combination of PPV and water mist system highly improved the efficiency of evacuation on heat and smoke density, clearly was influenced by the tilting angle.
Key Words: Positive Pressure Ventilation, Water mist, Fire suppression, Tilting angle
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