Liming Yuan, Alex C. Smith Process Safety and Environmental Protection

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Presentation transcript:

Numerical modeling of water spray suppression of conveyor belt fires in a large-scale tunnel Liming Yuan, Alex C. Smith Process Safety and Environmental Protection Volume 95, Pages 93-101 (May 2015) DOI: 10.1016/j.psep.2015.02.018 Copyright © 2015 Terms and Conditions

Fig. 1 NIOSH Fire suppression facility. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 2 Setup of conveyor belt and ignition gas burners. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 3 Physical model of simulated tunnel and conveyor belt. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 4 Comparison of heat release rates between test and simulation. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 5 Comparison of surface temperatures between test and simulation. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 6 Activation times for the first sprinkler at different locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 7 Heat release rates for different sprinkler locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 8 The maximum heat release rates before sprinkler activation for different. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 9 Belt surface temperatures 5m from belt leading edge for different sprinkler locations. sprinkler locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 10 Belt surface temperatures 7m from belt leading edge for different sprinkler locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 11 Downstream smoke temperatures 15cm below roof for different sprinkler locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 12 Radiation heat loss for different sprinkler locations. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 13 Heat release rates for different water flow rates. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 14 Belt surface temperatures for different water flow rates: 5m from belt leading edge. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 15 Belt surface temperatures for different water flow rates: 7m from belt leading edge. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 16 Downstream smoke temperatures 15cm below roof for different water flow rates. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 17 Heat release rates for different activation temperatures. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 18 Belt surface temperatures 5m from belt leading edge for different activation temperatures. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 19 Belt surface temperatures 7m from belt leading edge for different activation temperatures. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions

Fig. 20 Downstream smoke temperatures 15cm below roof for different activation temperatures. Process Safety and Environmental Protection 2015 95, 93-101DOI: (10.1016/j.psep.2015.02.018) Copyright © 2015 Terms and Conditions