Numerical analysis of the effect of horizontal distance between a water mist nozzle and ignition source on reduction in heat release rate

Lee, Jaiho; Moon, Jongseol

doi:10.1016/j.anucene.2020.107560

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…The extinguishing mechanism of the water mist extinguishing system depends on the type of fire 10 . Its fire extinguishing effect is subject to the characteristics of the water mist 11 , 12 , nozzle 13 , 14 , ventilation condition 15 , 16 , and other factors. Currently, the research object in experiments on the water mist fire extinguishing effect is mostly ethanol pool fire, and few scholars have studied the effectiveness of the water mist fire extinguishing system in the case of fires in liquor warehouses.…”

Section: Introductionmentioning

confidence: 99%

Feasibility assessment of a clean and efficient fire extinguishing system for pottery jar liquor warehouses

Li,

Wan,

Zhao

et al. 2024

Sci Rep

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Clean fire extinguishing systems applicable to the pottery jar liquor warehouse are in demand. In this study, taking 53vol% liquor as the research subject, fire models of various clean fire extinguishing systems comprising water mist, liquid carbon dioxide (LCO2) and liquid nitrogen (LN2) were established using a fire dynamic simulator to determine their fire extinguishing effect. A feasibility assessment of systems was performed under different fire source types, fire source sizes, and ventilation conditions. The fire extinguishing efficiency was analyzed in terms of the fire extinguishing time, oxygen concentration, and space temperature. The results showed that the success rate of the LCO2 and LN2 fire extinguishing systems was 100%, whereas the success rate of the water mist fire extinguishing system was 95%. In terms of reducing the oxygen concentration at the bottom of the space and the temperature in the space, the LCO2 system exhibited the best performance, followed by the LN2 system, and lastly the water mist. Under different ventilation conditions and fire source types, the LCO2 fire extinguishing system was least affected, whereas the effectiveness of the water mist fire extinguishing system reduced under natural ventilation conditions, and the extinguishing efficiency of the LN2 fire extinguishing system was affected by the fire source type. Overall, the LCO2 system presented more advantages in extinguishing fires in pottery jar liquor warehouses and can provide a new idea for the development and application of clean and efficient fire extinguishing systems.

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Section: Introductionmentioning

confidence: 99%

Feasibility assessment of a clean and efficient fire extinguishing system for pottery jar liquor warehouses

Li,

Wan,

Zhao

et al. 2024

Sci Rep

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“…The WMS nozzle parameters are critical for effective fire suppression in different application scenarios. Lee studied the application of WMS in a nuclear power plant electrical room and derived a power function relationship between the nozzle and fire source horizontal distance on fire suppression time [30]. Gui discussed the effect of nozzle characteristics parameters such as atomization cone angle, spray velocity, droplet size, and spray flow rate on fire suppression effectiveness in a naturally ventilated room [31].…”

Section: Introductionmentioning

confidence: 99%

Indoor Fire Simulation in Low-Rise Teaching Buildings Based on BIM–FDS

Liu

Wang

2023

Fire

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School buildings gather a large number of underage students, and the disastrous consequences of fire in such buildings are very serious, which is one of the key concerns of society in fire prevention and control. This study takes a “[” type kindergarten teaching building as the background and constructs a BIM–FDS building fire simulation model to reveal the fire smoke dispersion law under the coupling of the typical building structure and fire protection systems. The results show that the stairwells on both sides of the “[” type building are the main channels for the diffusion of fire smoke, and the asymmetry of the stairwell structure will cause apparent differences in the diffusion of smoke. Using the natural smoke exhaust in the stairwells of low-rise buildings does not aggravate the spread of smoke in the building and is conducive to smoke emissions. The high-pressure water mist system is superior to the water spray system in fire extinguishing and controlling room temperature. While it reduces smoke exhaust performance, it does not adversely affect personnel evacuation. This study systematically reveals the law of diffusion of fire smoke from “[”-type teaching buildings, which can support the design of similar building structures, ventilation, fire protection, and the formulation of fire escape plans.

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“…Other spray characteristics such as spray angle [26], nozzle type [27], flow rate and operating pressure [28] have also been investigated through numerical studies. Moreover, a wide range of simulation studies suggested that fire compartment characteristics, including the physical configuration of the fire compartment [29], ventilation conditions [30], the distance between the water nozzle and ignition source [31] and fire sizes [32] could also heavily affect the suppression efficiency of the systems. Among the numerical studies, Lee et al [31] have firstly explored the effect of the distance between a water spray nozzle and a fire on heat release rate (HRR).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, a wide range of simulation studies suggested that fire compartment characteristics, including the physical configuration of the fire compartment [29], ventilation conditions [30], the distance between the water nozzle and ignition source [31] and fire sizes [32] could also heavily affect the suppression efficiency of the systems. Among the numerical studies, Lee et al [31] have firstly explored the effect of the distance between a water spray nozzle and a fire on heat release rate (HRR). However, the investigation ceased at correlating the relationship between suppression time and nozzle distance.…”

Section: Introductionmentioning

confidence: 99%

On the Large Eddy Simulation Modelling of Water Suppression Systems Droplet Impact and Coverage Area

Cordeiro

Liu

Yuen

et al. 2022

Fire

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In this article, a collective database from validated numerical simulation has been established to study the suppression effects of water-based suppression systems under a single-compartment fire scenario at various suppression configurations and fire locations. Five fuel locations along the axis between the centre and corner of the room were configurated to dynamically analyse how the horizontal distance between the nozzle and fuel pan affects the heat release rate (HRR), temperature cooling phenomena at different heights and also the velocity profile. Throughout the fuel pan relocations, the water-mist system has achieved an average suppression time of 25 s for all the locations, it was found that the water mist system can effectively control the fire under 200 °C that is distanced over 2 m spanwise displacement from the nozzle against the fire, while the sprinkler has exhibited an excellent fuel surface cooling effect due to large momentum and heat capacity within the coverage area with an average suppression time of 50 s. The results of this study have further explored the spray coverage and droplet penetrability of different suppression systems at different locations corresponding to the fire source, and the quantitative assessment of fuel locations could also contribute to the future development of performance-based fire safety designs.

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Numerical analysis of the effect of horizontal distance between a water mist nozzle and ignition source on reduction in heat release rate

Cited by 10 publications

References 19 publications

Feasibility assessment of a clean and efficient fire extinguishing system for pottery jar liquor warehouses

Feasibility assessment of a clean and efficient fire extinguishing system for pottery jar liquor warehouses

Indoor Fire Simulation in Low-Rise Teaching Buildings Based on BIM–FDS

On the Large Eddy Simulation Modelling of Water Suppression Systems Droplet Impact and Coverage Area

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