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Analysis of the Influence of Construction Insulation Systems on Public Safety in China

View Article: PubMed Central - PubMed

ABSTRACT

With the Government of China’s proposed Energy Efficiency Regulations (GB40411-2007), the implementation of external insulation systems will be mandatory in China. The frequent external insulation system fires cause huge numbers of casualties and extensive property damage and have rapidly become a new hot issue in construction evacuation safety in China. This study attempts to reconstruct an actual fire scene and propose a quantitative risk assessment method for upward insulation system fires using thermal analysis tests and large eddy simulations (using the Fire Dynamics Simulator (FDS) software). Firstly, the pyrolysis and combustion characteristics of Extruded polystyrene board (XPS panel), such as ignition temperature, combustion heat, limiting oxygen index, thermogravimetric analysis and thermal radiation analysis were studied experimentally. Based on these experimental data, large eddy simulation was then applied to reconstruct insulation system fires. The results show that upward insulation system fires could be accurately reconstructed by using thermal analysis test and large eddy simulation. The spread of insulation material system fires in the vertical direction is faster than that in the horizontal direction. Moreover, we also find that there is a possibility of flashover in enclosures caused by insulation system fires as the smoke temperature exceeds 600 °C. The simulation methods and experimental results obtained in this paper could provide valuable references for fire evacuation, hazard assessment and fire resistant construction design studies.

No MeSH data available.


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Experimental equipment of XPS panel exposure to heat radiation.
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ijerph-13-00861-f002: Experimental equipment of XPS panel exposure to heat radiation.

Mentions: Ignition by thermal radiation experiments were conducted to study the ignition and combustion characteristics of XPS panel under different radiation heat fluxes. The experimental equipment includes a cone calorimeter, heat flux collector, temperature collector, mass loss collector and video capture, as shown in Figure 2. The samples are 10 cm (length) × 10 cm (width) × 4.5 cm (thickness), and all four sides and the bottom surface of the specimens are wrapped by inorganic fibre, thus only the top surface was exposed to the cone calorimeter which is more similar in the real fire conditions. Three groups of experiments were conducted under different radiation heat fluxes and the radiation heat flux changes linearly with time as shown in Table 2.


Analysis of the Influence of Construction Insulation Systems on Public Safety in China
Experimental equipment of XPS panel exposure to heat radiation.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5036694&req=5

ijerph-13-00861-f002: Experimental equipment of XPS panel exposure to heat radiation.
Mentions: Ignition by thermal radiation experiments were conducted to study the ignition and combustion characteristics of XPS panel under different radiation heat fluxes. The experimental equipment includes a cone calorimeter, heat flux collector, temperature collector, mass loss collector and video capture, as shown in Figure 2. The samples are 10 cm (length) × 10 cm (width) × 4.5 cm (thickness), and all four sides and the bottom surface of the specimens are wrapped by inorganic fibre, thus only the top surface was exposed to the cone calorimeter which is more similar in the real fire conditions. Three groups of experiments were conducted under different radiation heat fluxes and the radiation heat flux changes linearly with time as shown in Table 2.

View Article: PubMed Central - PubMed

ABSTRACT

With the Government of China’s proposed Energy Efficiency Regulations (GB40411-2007), the implementation of external insulation systems will be mandatory in China. The frequent external insulation system fires cause huge numbers of casualties and extensive property damage and have rapidly become a new hot issue in construction evacuation safety in China. This study attempts to reconstruct an actual fire scene and propose a quantitative risk assessment method for upward insulation system fires using thermal analysis tests and large eddy simulations (using the Fire Dynamics Simulator (FDS) software). Firstly, the pyrolysis and combustion characteristics of Extruded polystyrene board (XPS panel), such as ignition temperature, combustion heat, limiting oxygen index, thermogravimetric analysis and thermal radiation analysis were studied experimentally. Based on these experimental data, large eddy simulation was then applied to reconstruct insulation system fires. The results show that upward insulation system fires could be accurately reconstructed by using thermal analysis test and large eddy simulation. The spread of insulation material system fires in the vertical direction is faster than that in the horizontal direction. Moreover, we also find that there is a possibility of flashover in enclosures caused by insulation system fires as the smoke temperature exceeds 600 °C. The simulation methods and experimental results obtained in this paper could provide valuable references for fire evacuation, hazard assessment and fire resistant construction design studies.

No MeSH data available.


Related in: MedlinePlus