Thermal and fire risk analysis of low pressure on building energy conservation material flexible polyurethane with various inclined facade constructions

• Published in: Construction & building materials 2018-04, Vol.167, p.449-456
• Main Authors: Ma, Xin, Tu, Ran, Ding, Chao, Zeng, Yi, Wang, Yang, Fang, Tingyong
• Format: Article
• Language: English
• Subjects: Analysis; Building facade; Building materials; China; Energy conservation; Energy saving; Fire protection; Flexible polyurethane; Heat feedback; Low air pressure; Thermal properties
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2018.02.027

•Phenomenological analyses of flame spreading behavior of FPU were provided.•Global burning rate was illustrated by theory of effect pressure and pool fire.•The influence of pressure on flame height and temperatures was studied theoretically.•Pressure effects on flame spread velocity were interpreted in mechanism. This study investigated the factors affecting the fire safety analysis of the common construction material flexible polyurethane foam, based on combustion at various inclination angles and the ambient pressures at the altitudes of the cities of Hefei (99.8 kPa) and Lhasa (66.5 kPa). The effects of ambient air pressure, specimen width and inclination angle on the burning rate (as determined by mass loss), average flame spreading velocity, flame temperature and flame length were examined. The combustion rate was lower at 66.5 kPa and the wider specimens exhibited gradual spreading of the flame front in conjunction with melting and dripping. The burning rates at various inclinations were found to correlate with the pressure according to the expression ṁ∝pn,0.67