Browsing Fire Protection Engineering by Author "An, Deukkwang"
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- ItemSodium fire suppression using liquid nitrogen(2011) An, Deukkwang; Sunderland, Peter B; Lahtrop, Daniel P; Fire Protection Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Sodium has unusual fire hazards, notably a violent reaction with water. Experiments were conducted to examine the effectiveness of liquid nitrogen against sodium fire by heating stainless steel beakers (125 ml for 5 and 10 g sodium, and 250 ml for 20,40 and 80 g) At 285 °C, a vigorous surface reaction arises, resulting in a rapid temperature increase; ignition temperatures vary from 320-450 °C. At 600 °C, LN2 was added at a flow rate of 3 g/s. Applying LN2 to the sodium fire was effective as a sodium fire extinguisher. The linear correlation of the mass of sodium versus the mass of LN2 is approximately 1:2.9, whereas the analytical calculation of this ratio gives 1:3.0.