Examination of Performance of WaterMist Fire Suppression Systems underVentilation Conditions

Liu, Zhigang; Kim, Andrezza Kyunmi; Su, Joseph Z.

doi:10.1106/3ve8-wwt4-c3u4-feh9

Cited by 19 publications

(14 citation statements)

References 7 publications

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“…If the entire compartment is covered by the WMFSS, these two effects will act together. System performance depends on spray characteristics such as water mist droplet size and external factors including fuel of the fire to be controlled, compartment geometry and aerodynamics induced by the ventilation configurations [17]. Ventilation plays a very important role and this should be considered carefully for small retail shops.…”

Section: Brief Summary On the Suppression Mechanisms Of Wmfssmentioning

confidence: 99%

“…Smoke temperature, smoke production rate, time to flashover, and interaction of water mist and smoke are affected by ventilation. As investigated by Liu and coworkers [17] with full-scale burning tests, water mist suppression effectiveness under forced ventilation was substantially reduced due to the strong mass exchange between the room and its surroundings. Therefore, a total flooding system is not suitable in small retail shops with adequate ventilation as fresh air supply into the shop would keep oxygen concentration high.…”

Section: Possibility Of Using Wmfss For Protecting Small Retail Shopsmentioning

confidence: 99%

“…Some experimental and simulated results have been reported for compartmental fires with limited openings, and the scheme can be referred to for the present application e.g. [17,18,29].…”

Section: Possibility Of Using Wmfss For Protecting Small Retail Shopsmentioning

confidence: 99%

“…Key aspects such as spray characteristics, suppression mechanisms, application areas and fire test protocols have been studied actively e.g. [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The WMFSS can be used in many areas though the system is most widely used in marine engineering.…”

Section: Introductionmentioning

confidence: 99%

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Application of Water Mist Fire Suppression Systems in Small Retail Shops

Chow

Yao

2002

Journal of Fire Sciences

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Protecting small retail shops packed with combustible goods by sprinkler system might not be too satisfactory. Any delay in system activation will lead to a flashover fire. Also, there might be serious water damage which is not good for shops selling expensive items. Alternative fire protection systems should be searched for. Water mist might be effective for suppressing postflashover fires if the system is designed properly. Whether water mist fire suppression systems can be used in the small shops is discussed in this paper. Key factors affecting the system performance will be discussed. Potential application strategies are outlined. An example was used to illustrate the design of the system.

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Section: Brief Summary On the Suppression Mechanisms Of Wmfssmentioning

confidence: 99%

Section: Possibility Of Using Wmfss For Protecting Small Retail Shopsmentioning

confidence: 99%

“…Some experimental and simulated results have been reported for compartmental fires with limited openings, and the scheme can be referred to for the present application e.g. [17,18,29].…”

Section: Possibility Of Using Wmfss For Protecting Small Retail Shopsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Water Mist Fire Suppression Systems in Small Retail Shops

Chow

Yao

2002

Journal of Fire Sciences

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“…또한, 화재진압 시간은 화재의 크기, 격실의 크기, 환기 조건 등 에 따라 달라질 수 있다. 이전의 연구들 (3)(4)(5)(6)(7) 은 노즐 특성 및 격실 조건 변화가 화재진압 특성에 미치는 영향을 실험 및 수치적인 방법으로 연구해 왔다.…”

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Numerical Analysis of the Effects of Droplets Characteristics of Water Spray on Fire Suppression

Lee¹

2019

Fire Sci. Eng

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In this study, the effects of the characteristics of droplets of water spray on suppression of fire were analyzed numerically using fire dynamics simulator (FDS) 6.5.2. Additionally, the fire suppression characteristics by the water spray nozzle, including the extinguishing coefficient (EC), droplet size distribution function (SDF), median volumetric diameter (MVD), and droplets per second (DPS), were evaluated in terms of the decreasing normalized heat release rate (HRR) curve and cooling time. It was observed that with increase in the EC, the normalized HRR curve decreased rapidly, and the changing MVD affected the suppression of fire. In case of mono-disperse, the normalized HRR curve decreased slowly with the increase in DPS. On the contrary, in case of multi-disperse, the normalized HRR curve decreased rapidly even with a small increase in DPS.

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Full-Scale Experiments of Fire Control and Suppression in Enclosed Car Parks: A Comparison Between Sprinkler and Water-Mist Systems

2016

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Recent efforts to investigate car-park fires and understand the related mechanisms have fostered the need for analyses of suppression performance against this type of fire scenario. This work aims at providing an insight into the ability of sprinklers and water-mist systems to control and extinguish a fire within an enclosed car park through a series of real-scale experiments. Three cars were employed in each test: the central one was ignited by a heptane pool fire and the adjacent ones served as targets. Two configurations were explored: in the first one, a nozzle was placed directly at the vertical axis of the ignition source, whereas the ignition source was located between the area coverage of four nozzles in the second one. The sprinkler system mainly served as a reference; two values of discharge density were evaluated for water mist at high operative pressure and a biodegradable surfactant was also tested against the most challenging configuration. A quantitative analysis of free-burn and discharge phases by temperature measurements was coupled with radiant heat-flux measurements and an assessment of post-fire damage. Sprinkler and water-mist systems were capable of containing the fire spread and thermally controlling the fire, thus preventing structural damage. The water mist’s ability to overpower the plume and reach the burning surfaces proved more effective than that of sprinklers, especially as no nozzles were located right above the ignition surface. The higher discharge density showed better capability of preventing re-ignition phenomena and suppression was attained in both the investigated configurations, which suggests that a certain amount of flux is also needed to achieve flame cooling. The additive had promising impact on suppression performance; however, more tests are required to specifically explore its ability to enhance thermal control

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Examination of Performance of WaterMist Fire Suppression Systems underVentilation Conditions

Cited by 19 publications

References 7 publications

Application of Water Mist Fire Suppression Systems in Small Retail Shops

Application of Water Mist Fire Suppression Systems in Small Retail Shops

Numerical Analysis of the Effects of Droplets Characteristics of Water Spray on Fire Suppression

Full-Scale Experiments of Fire Control and Suppression in Enclosed Car Parks: A Comparison Between Sprinkler and Water-Mist Systems

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