| Summary: | 碩士 === 中臺科技大學 === 安全與防災科技研究所 === 101 === During the early stage of fire, portable fire extinguishers are the most commonly used. But considering its portability and operability, the extinguishing agent is limited. In general, the operating time of extinguisher is about 10 to 30 seconds. If considered fire control, the fire extinguishing time is too short to extinguish a fire. At present, the commonly used types of portable fire extinguishers in Taiwan are dry powder, foam, carbon dioxide gas extinguishers and the halon alternatives, those types of extinguishers have the environmental and health concerns. In contrast, backpack water mist system could operate longer (1 to 3 minutes), and without the environmental problems. While water mist released, the fire source temperature was reduced, which prevented reigniting the fire and could protect personal safety. In this study, a series of real field fire tests were hold to evaluate the backpack water mist extinguishing system characteristics and performance. Experimental results showed that backpack water mist fire extinguishing system has good efficiency on class A and B fire. The self-designed extinguishing mist nozzle performed better than A-brand nozzle. While the additive is added into the mist, the efficiency of backpack water mist is obviously improved.
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