| Summary: | 碩士 === 弘光科技大學 === 環境工程研究所 === 107 === In this study, generally inspiration point of extinguishing water, the water was found to flow characteristics of the liquid, is limited to a single point endotherm fire source, the elapsed time after the increase of the water, the resurgence of the fire temperature for an easy to consume a large amount of water, secondary water damage, the water pollution problem, to solve this phenomenon and the need to enhance the effec-tiveness of fire suppression effectiveness of water-saving, low-temperature fire extinguishing agent and therefore add, the choice of the very low temperature of dry ice as solid state and with additives.
In this study, the resurgence of the timber is easy to fire as a target for angry, smoldering type, water analysis, two fire-fighting properties of dry ice, dry ice pellets to explore and analyze the size and parameters of the fire with dry ice water changes, this parameter is the same as the wa-ter and Modules of extinguishing fire on bases, with the control group (fire water), investigate the best water ice than the extinguishing efficien-cy, achieve optimum water and ice with the fire conditions, compared with the performance of the provincial water consumption of water.
The study found that water in fire ignition temperature( 500 oC ~700 oC) can effectively cool, in a dry ice smoldering fire temperature( 100 oC ~500 oC) than water will fire, can be shortened by about 4 minutes extinguishing time, when the dry ice pellets to extend the size of 1 ~2 cm when volatilized time, to enhance the extinguishing effect, and do not mix at 500 oC less water is sprinkled into the fire extinguishing embodiment, can reduce the amount of extinguishing water, the effectiveness of saving. Experiments also found that the higher amount of dry ice with ice water and fire, extinguishing efficiency the better; when the water ice (extinguishing water) ratio of extinguishing time of 25 minutes was 5.833, the extinguishing time of 26.5 minutes, compared with the control group, extinguishing efficiency presents poor phenomenon. Amount of dry ice to 9 kg, water ice than 0.8333 extinguishing water is 5 L, extinguishing time of 7.5 minutes compared to the control group (extinguishing water) extinguishing water 20 L, water consumption can be reduced 4-fold, 3-fold extinguishing time.
Put out the fire with water and ice, can significantly enhance the ef-fectiveness of fire, and water-saving performance of the fire, the fire ef-fectively reduce the water now easy to produce secondary disasters water damage, the disaster a lot of harm indirectly reduce sewage pollution of the environment.
Keywords: fire, burning, temperature, save water, fire, water, dry ice
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