Water Mist Fire Suppression Systems

Mawhinney, J. R.; Back, G. G.

doi:10.1007/978-1-4939-2565-0_46

Cited by 30 publications

(44 citation statements)

References 56 publications

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“…They showed that extinguishing a fire with water-mist is accomplished by rapid and total clearance of water, rather than by a reduction in burning rate. Mawhinney and Solomon (1997) utilized a twin-fluid nozzle to generate a fine spray to extinguish liquid pool fires. They demonstrated that spraying downward directly at the flames is the most effective means of extinguishing a fire.…”

Section: Introductionmentioning

confidence: 99%

Full-scale experimental and numerical analysis of water mist system for sheltered fire sources in wind generator compartment

Chiu¹,

Li²

2015

Process Safety and Environmental Protection

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Section: Introductionmentioning

confidence: 99%

Full-scale experimental and numerical analysis of water mist system for sheltered fire sources in wind generator compartment

Chiu¹,

Li²

2015

Process Safety and Environmental Protection

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“…Water mist has been acknowledged for the effectiveness on suppressing and extinguishing on several type fires with minimum water damage and water consumption due to the small droplet size (<1.000 μm). The suppression mechanism by using water mist as fire suppression involve several combined physical phenomena which is [1] :…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Water Mist Fire Suppression System Effectiveness on Shielded Fire

Kuswantoro

Nugroho

2018

E3S Web Conf.

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This study aims to investigate the effectiveness of water mist on suppressing a shielded fire. Full-scale experiments are carried out in a partition room of (lxwxh) 2x2x2.5 m size. Five water mist nozzle which consist of two type nozzle was used, high flow (fogjet) nozzle installed at top center of the room and fine spray nozzle installed at each side of room at high 1.5 m from ground. The pressure of water mist system was maintained at 20 bar which correspond to 2.6 lpm of water flow rate. Wood crib of 6.5 x 6.5 x 6 cm size was used as the fuel source. The obstruction used as a fuel shield has table like form with 40 x 40 cm cover area and 0.5 m height. The location of fuel source and fuel shield was varied (1) fuel source and shield at centre of room, (2) fuel source at one side of shield and the shield at centre of room, (3) fuel source and shield at corner of room, and (4)) fuel source at one side of shield and the shield at corner of room. Numerical simulation using FDS 6.5.3 was also performed to validate the use of FDS and get better understanding of the phenomena. The results showed that water mist was able to extinguish the fire around 20 s, 16 s, 30 s, and 24 s for scenario 1, 2, 3 and 4 respectively. It is also observe that the mist distribution around the shield and cover area of the shield play a role on the capacity and time needed of water mist to extinguish the fire.

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“…Heat transfer is increased so that fog systems can pick up energy from the burning zone faster and more efficiently. The surface of the water vapour increases exponentially with a decrease in the diameter of the drops (Mawhinney, Solomon 2000;Mawhinney 2012;Orzechowski, Prywer 2008). Floating in the air, small water droplets form a barrier that limits the speed of pyrolysis (evaporation in the case of liquids) close to the combustion zone.…”

Section: Introductionmentioning

confidence: 99%

Simulation Tests of Extinguishing Process Using Mist Nozzles With Application of Hybrid Fire Model

Gałaj

Konecki

Šukys

2016

Journal of Civil Engineering and Management

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The article presents a computer model of the fire extinguishing process using mist nozzles. A previously developed hybrid fire model was used for this purpose. Assumptions and relationships were given to represent a mathematical model of extinguishing process, which comprises a unique approach to the determination of sprinkling area in an elementary cell of field fire model. A description of simulation tests of the model was given for several different input data, differing by mean diameters of droplets. This enabled a study of their effects on such output parameters as received heat flux, temperature and rate of its growth. For one selected computational cell located on the axis of the nozzle at floor level having the coordinates [10, 10, 1], the obtained results were presented in the form of heat flux and temperature. To simplify the analysis, characteristic parameters of particular curves were listed in the table. Conclusions formulated on the basis of results obtained during tests were specified at the end of work. They confirmed the expected regularity assuming that the extinguishing process was more effective in the case of droplets of a smaller diameter and greater sprinkling intensity. This allows assessing the degree, to which these stream parameters affect the extinguishing effectiveness.

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Water Mist Fire Suppression Systems

Cited by 30 publications

References 56 publications

Full-scale experimental and numerical analysis of water mist system for sheltered fire sources in wind generator compartment

Full-scale experimental and numerical analysis of water mist system for sheltered fire sources in wind generator compartment

Experimental and Numerical Study of Water Mist Fire Suppression System Effectiveness on Shielded Fire

Simulation Tests of Extinguishing Process Using Mist Nozzles With Application of Hybrid Fire Model

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