Experimental study of altitude and orientation effects on heat transfer over polystyrene insulation material

Huang, Xinjie; Liu, Wei; Zhao, Jie; Zhang, Ying; Sun, Jinhua

doi:10.1007/s10973-015-4667-0

Cited by 20 publications

(9 citation statements)

References 41 publications

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“…There appears to be little consensus on the effects of the panel length. In most models, it was assumed that the length of the fuel sample was invariable [16][17][18], and the sample width and thickness were used as experimental parameters [19]. However, the flame spread behavior of panels with different widths and lengths has not been researched.…”

Section: Introductionmentioning

confidence: 99%

Fire Spread Characteristics of Metal-Polyethylene Sandwich Panels

et al. 2021

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An experimental study was conducted to determine the characteristics of the flame spread and droplets of metal-polyethylene (PE) sandwich panels during combustion. The mass-loss rate, average flame height, temperature, and fire spread rate were investigated. The results showed that the fire spread rate, mass change of the droplets, average flame height, and temperature increased with an increase in the sample length, except for the mass loss rate of the 40 cm-long sample. The time interval between the droplets decreased, and the flame pulsation frequency increased. The relationship between the flame height and sample length was determined. During the combustion process, bending deformation and top flame phenomena occurred due to the shrinkage of the PE, which increased the fire risk. The distance between the outer surface of the expanded metal aluminum layer and the insulation panel increased with an increase in the panel length. A schematic diagram of the fire spread of the metal sandwich panel was established based on the observations and theoretical analysis. The mechanism and combustion behavior of the metal sandwich panels were determined to provide references for the construction of metal sandwich panels of exterior walls.

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Section: Introductionmentioning

confidence: 99%

Fire Spread Characteristics of Metal-Polyethylene Sandwich Panels

et al. 2021

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“…Zhang et al 6 explored the influence of sample width on the horizontal flame spread over XPS surface and derived the heat transfer mechanism of sample width causing the acceleration of flame spread. Huang et al 7 studied the influence of sample thickness and inclination angle on flame spread of XPS, and found that pool fire length, flame length, and mass loss rate (MLR) increase along with the increase of thickness. Zhou et al 8 investigated the effects of ambient pressure and inclined angle on concurrent flame spread over rigid PU foam and revealed the heat transfer mechanism involved.…”

Section: Introductionmentioning

confidence: 99%

Effect of shielding rates on upward flame spread over extruded polystyrene foam in vertical channel and heat transfer mechanism

Peng

Yin

et al. 2020

Fire and Materials

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SUMMARY Fire hazard of extruded polystyrene (XPS) thermal insulation materials has aroused public concern. In order to develop flame spread theory and the guideline for fire risk assessment of XPS, an experimental study on upward flame spread behavior and heat transfer mechanism of XPS in a vertical channel with different frontal shielding rates was conducted. Maximum temperature at the place 2 cm from XPS surface and at the center of channel first increase and then decrease as the shielding rate rises. The former is higher than the latter. Experimental value of average flame height rises as the shielding rate increases. A model for predicting the flame height is built, and the predicted results are consistent with the experimental results. Moreover, the relation between flame height and pyrolysis height under different shielding rates is obtained. The flame spread rate rises as the shielding rate increases. A prediction model of flame spread rate is established, and its prediction results are more accurate compared with those from previous models. The model also predicts that radiative heat transfer is the dominant heat transfer mode, accounting for 93% of the total heat transfer. This work is beneficial for fire risk assessment and fire safety design of building façade.

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“…Expandable polystyrene (EPS) foam has excellent properties, such as light weight, low thermal conductivity, and shock absorption and noise reduction properties, and it has been widely applied in building, packaging, automotive, and many other fields . However, EPS foam is extremely flammable, for two reasons: its chemical composition (mainly composed of carbon and hydrogen) and its structural characteristics (an interior beehive structure with thin cellular walls, large surface area, and 98% combustion‐supporting gas occupying the holes).…”

Section: Introductionmentioning

confidence: 99%

Preparation of halogen‐free flame‐retardant expandable polystyrene foam by suspension polymerization

Yuan

Wang

Bai

2019

J of Applied Polymer Sci

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In this research, using hexaphenoxycyclotriphosphazene (HPCTP) as the halogen-free flame retardant, we prepared flameretardant expandable polystyrene (EPS) beads by suspension polymerization. The effects of process parameters and the amount of flame retardant on polystyrene (PS)/HPCTP composite beads were investigated. The results show that the change in HPCTP content has little effect on the particle size distribution of composite beads. When the oil-water ratio is 1/4, TCP dosage is 3 wt %, stirring rate is 350 rpm, initiator dosage is 1.25 wt %, and HPCTP dosage is 15 wt %, the size of the composite beads is uniform, and the average particle size is 1.12 mm. HPCTP formed nanodispersed particles in the PS matrix with an average particle size of 44.86 nm. In addition, the thermogravimetric behavior and heat-release properties of composite beads were evaluated. The results showed that HPCTP mainly acted in the gaseous phase, which can effectively decrease the maximum mass-loss rate of the PS/HPTCP composite beads and significantly reduce the heat-release rate and heat-release capacity. The EPS foams were obtained by a prefoaming method. The average cell diameter was 62.15 μm, and the foaming ratio was 11 times.

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Experimental study of altitude and orientation effects on heat transfer over polystyrene insulation material

Cited by 20 publications

References 41 publications

Fire Spread Characteristics of Metal-Polyethylene Sandwich Panels

Fire Spread Characteristics of Metal-Polyethylene Sandwich Panels

Effect of shielding rates on upward flame spread over extruded polystyrene foam in vertical channel and heat transfer mechanism

Preparation of halogen‐free flame‐retardant expandable polystyrene foam by suspension polymerization

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