| Project/Area Number |
23651160
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Social systems engineering/Safety system
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| Research Institution | Hirosaki University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 火災 / 消火 / 不活性ガス / カプセル消火 / ゴム風船 / 水損低減 / プール火災 / 拡散火炎 / 流れの可視化 / プール火炎 / 減災 / 消火可能限界 / 熱容量 |
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| Research Abstract |
In order to clarify the characteristics of rubber balloon extinguishment, blowoff experiments have been performed. Physically acting inert gases are used. Ethanol, 1-butanol and n-heptane are used to form a small scale pool fire. From the experimental results, we can define the extinguishment limit, which means the minimum inert gas volume required for achieving flame extinguishment with the rubber balloon filled with inert gas. By using the magnitude of the extinguishment limit value, the extinguishing ability of inert gas in the rubber balloon extinguishment can be evaluated. As a result, the effectiveness ranking of the inert gas in rubber balloon extinguishment agrees well with that of the cup-burner test. Moreover, it is found that when the size of the pool fire (fuel pan diameter) is same, the value of the lower heating value of fuel divided by the inert gas heat capacity at the extinguishment limit shows a certain constant value independent of inert gas and fuel species.
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