Heat release rate of wooden cribs with water application for fire suppression

A review on fire suppression by fire sprinklers

“…Another experimental study on the interaction of a fine water spray with liquid pool fires was performed by Liao et al 74 Two pool fires of 50 mm diameter and 100 3 100 mm 2 dimensions, containing 34 and 100 g of fuel was used. The water spray characteristics of droplet size, velocity distributions and volume flux of the fine water spray are in accordance with the one reported by Noaki et al 71 The researchers observed among other outcomes that the water spray suppressed the gas phase combustion through cooling, oxygen displacement and the attenuation of heat radiation. Qing et al 75 developed a model for effective control of fire source HRR.…”

“…Three fire sizes were evaluated and the variability in detector performance, impact of ambient conditions on fire detection and system performance under non-flat ceilings were reported. In a study conducted by Noaki et al, 71 a series of burning experiments for different layers wood crib were carried out to characterize the maximum value of HRR of wood cribs. Varying the delivered water density and water activation time, the respective HRR was evaluated.…”

Influence of Compartment Fire Behavior at Ignition and Combustion Development Stages on the Operation of Fire Detectors

“…The findings from [12,27,28] are of special interest in the field of fire behavior and the application of results in fire suppression and detection systems. Noaki et al [27] determined the intensity of heat release from wooden cribs when liquid was applied for fire suppression. The reduction in the maximum heat release rate was found to be proportional to the water flow rate.…”

“…The variable experimental parameters were the number of wooden layers, water discharge density and time of spray system activation. As pointed out [27], fire suppression using sprinkler systems is only effective with sufficient water discharge density and timely spray system activation based on fire behavior. The trends in heat release rates after water application are also presented in [27].…”

“…As pointed out [27], fire suppression using sprinkler systems is only effective with sufficient water discharge density and timely spray system activation based on fire behavior. The trends in heat release rates after water application are also presented in [27]. The following outcomes were shown to be possible: (1) material is extinguished immediately after sprinkler activation; (2) after spray system activation, combustible materials and substances continue burning, though the heat release rate significantly decreases; (3) after liquid is injected, the rate of heat release keeps rising;…”