Some observations on experimental fires in enclosures. Part I: Cellulosic materials.
Combust Flame 1972 Aug; 19(1):101-111
Characteristics of the smoke and toxic contaminants generated in experimental ventilation controlled fires involving cellulosic materials were studied. Wooden cribs placed inside sheet steel asbestos lined enclosures were ignited, and temperature and gas composition were measured continuously at different sampling sites within the enclosure. Plots of burning rate time profiles had three periods of burning as the weight of fuel increased. When initial crib weight was 2.82 kilograms and a single window provided controlled ventilation, the amount of carbon-monoxide (630080), carbon-dioxide (124389), methane (74828), and oxygen (7782447) produced ranged from 2.9 to 5.5, 11.3 to 14.3, 0.08 to 0.14, and 6.0 to 9.1 percent, respectively, and temperature ranged from 559 to 587 degrees Kelvin. Gas composition, temperature, and burning rate varied with the ventilation parameter for the enclosure, and within the enclosure four distinct regions of fire were identified, based on relationships among these factors. The author concludes that the interface between Regions I and II is the most dangerous for residential fires, because temperature reaches 700 degrees Kelvin, carbon-monoxide concentration is 8 percent, and oxygen concentration decreases to 4 percent at this interface.
NIOSH-Publication; NIOSH-Grant; Grants-other; Combustion-products; Thermal-reactions; Wood-products; Combustion-chambers; Combustion-gases; Thermodynamics; Pyrolysis-products
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