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http://dx.doi.org/10.7731/KIFSE.2019.33.5.007

Effects of Char Produced from Burning Wood Combustibles on Thermal Pyrolysis  

Hong, Ter-Ki (Dept. of Mechanical System & Automotive Engineering Graduate School of Chosun University)
Ryu, Myung-Ho (Dept. of Mechanical System & Automotive Engineering Graduate School of Chosun University)
Lee, Jong Won (Future & Converging Technology Research Division, Technology R & D Head office, Korea Aerospace Research Institute (KARI))
Park, Seul-Hyun (School of Mechanical System & Automotive Engineering, Chosun University)
Publication Information
Fire Science and Engineering / v.33, no.5, 2019 , pp. 7-12 More about this Journal
Abstract
To investigate the influence of the char layer formed during the combustion process on the pyrolysis of wood combustibles, ISO 5660-1 cone calorimetry experiments and Fire dynamics simulator (FDS) simulations were performed, and the results from these two methods were compared. The wood combustible selected as the fuel for this study, Douglas fir, has been widely used for the production of building materials, furniture, etc. The heat release rate (HRR) measured from the cone calorimetry experiment was in good agreement with the result predicted by the FDS simulation. However, the FDS simulation failed to predict the heat released by the smoldering combustion process, due to the absence of the char surface reaction in the model. The FDS simulation results clearly indicate that the char layer formed on the surface of combustibles produces a thermal barrier which prevents heat transfer to the interior, thickening the thermal depth and thus reducing the pyrolysis rate of combustibles.
Keywords
ISO 5660-1; Cone calorimeter; Douglas-fir; Fire dynamics simulator (FDS); Char;
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