PROPERTIES OF PLUME AND NEAR FIRE SOURCE IN HORIZONTALLY LONG AND NARROW SPACES

Fires are accidents that can cause numerous human casualties in multiplexes. The simple sprinkler systems applied in South Korea employ sprinklers to protect people against residential fires, as specified by the National Fire Protection Association (NFPA) standard 13D. Therefore, it is necessary to evaluate the fire control performance of multiplexes, which are at a greater risk than residential facilities. This study aims to verify the fire control performance of simple sprinklers in multiplexes and to develop a fire source that can be used as a protocol for testing fire suppression methods. The fire source was evaluated by using a 3 MW large-scale calorimeter (ISO 13784). The proposed fire source for multiplexes was applied in various forms according to the application methods, with ignition sources including cotton wick, wood crib, and heptane, and then the fire tests were conducted.

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Heat transfer characteristics of fire source and its visualization for spontaneous ore combustion

2010 5th International Conference on Computer Science & Education ◽

10.1109/iccse.2010.5593833 ◽

2010 ◽

Author(s):

Liu Hui ◽

Wu Chao

Keyword(s):

Heat Transfer ◽

Heat Transfer Characteristics ◽

Fire Source ◽

Transfer Characteristics

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Numerical Analysis of Fire Behavior of a Large Space Pre-Stressed Steel Structure under Fire

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.3729 ◽

2011 ◽

Vol 71-78 ◽

pp. 3729-3732

Author(s):

Ming Zhou ◽

Zhi Guo Xie ◽

Xin Tang Wang

Keyword(s):

Numerical Analysis ◽

Fire Behavior ◽

Thermal Response ◽

Structural Response ◽

Steel Structure ◽

Large Space ◽

Fire Source ◽

Lattice Shell ◽

In Fire ◽

Influence Degree

The computational model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed. The different space height and different rise-span ratio are considered for analysis of response temperature, displacements and stresses of the pre-stressed lattice shell under fire for one fire source. It is also shown that displacement of the node right above the inner cable is the maximum among the four nodes presented here as the fire source is located at the position right below the second-ring cable of the structure. It is concluded that the influence degree of space height of the structure on the fire response of the structure is not great, but rise-span ratio has obvious and great effect on displacements and stresses of the pre-stressed steel structure with large span in fire.

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The Experimental Study on the Fire Suppression Effectiveness of Water Mist with the FeCl2 Additives

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.790.53 ◽

2013 ◽

Vol 790 ◽

pp. 53-56

Author(s):

Chen Jian ◽

Xu Yan Ying ◽

Wang Na

Keyword(s):

Experimental Study ◽

Fire Suppression ◽

Water Mist ◽

Experimental Results ◽

Additive Concentration ◽

Experimental Conditions ◽

Fire Source ◽

Fire Extinguishing ◽

Nozzle Position

This paper presents an experimental study of fire suppression effectiveness with water mist containing FeCl2 additives.The investigation focuses on suppression effectiveness under various FeCl2 additives concentrations,working pressures and nozzle different height above the fire source . The experimental results show that: there is a significant impact on fire suppression effectiveness when adding FeCl2 to water mist. There is an optimum additive concentration of extinguishing fire, corresponding to the shortest extinguishing time, the least amount of water, the highest efficiency of extinguishing fire. The nozzle working pressures and nozzle position have effect on the performance of the water mist extinguishing: the greater the pressure is, the shorter water mist fire extinguishing time is. Under the same experimental conditions, the closer the water mist nozzles are to the oil pan, the shorter extinguishing time is.

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