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http://dx.doi.org/10.7731/KIFSE.2019.33.3.037

Ethanol Pool Fire Extinguishing Experiment Using Twin-fluid Nozzle Supplied with Water and Air  

Jeong, Chan Seok (Dept. of Fire Protection Engineering, Pukyong Nat'l Univ.)
Lee, Chi Young (Dept. of Fire Protection Engineering, Pukyong Nat'l Univ.)
Publication Information
Fire Science and Engineering / v.33, no.3, 2019 , pp. 37-43 More about this Journal
Abstract
In this study, ethanol pool fire extinguishing experiments were conducted using a twin-fluid nozzle. Ethanol pool fires, 5.027×10-3 ㎡ and 1.131×10-2 ㎡ in size (80 mm and 120 mm in fuel pan diameter, respectively), were tested, and the flow rates supplied to the twin-fluid nozzle for fire extinguishing were 156-483 g/min and 20-70 L/min for water and air, respectively. The heat release rate increased with increasing fire source area, and heat release rates of 5.027×10-3 ㎡ and 1.131×10-2 ㎡ in size were measured to be 1.01 kW and 5.51 kW, respectively. For both fire source cases in the present experimental range, regardless of the water flow rates, the ethanol fires were extinguished successfully under the high air flow rate condition (e.g., above 40 L/min). On the other hand, under all water flow rate conditions, the fire extinguishing time and water consumption decreased with increasing air flow rate, which were approximately 23 s and 185 g under high air flow rate conditions (e.g., above 50 L/min), respectively. Based on the water consumption per heat release rate, the present experimental data were compared with the previous ones using a single-fluid nozzle, and it was found that the twin-fluid nozzle could extinguish a fire with a lower water consumption than a single-fluid one.
Keywords
Twin-fluid nozzle; Ethanol pool fire; Fire extinguishing; Water mist;
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