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A model for the pyrolysis of two Nordic structural timbers
Author(s) -
RintaPaavola Aleksi,
Hostikka Simo
Publication year - 2021
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.2947
Subject(s) - charring , microscale chemistry , combustion , differential scanning calorimetry , pyrolysis , cone calorimeter , thermogravimetric analysis , calorimetry , heat of combustion , materials science , work (physics) , calorimeter (particle physics) , environmental science , char , thermodynamics , composite material , waste management , chemistry , engineering , chemical engineering , mechanical engineering , mathematics , organic chemistry , physics , mathematics education , electrical engineering , detector
SUMMARY Performance‐based design of the timber structures' fire resistance is often based on the reduced cross section and thus relying on empirical and numerical assessment of the charring propagation. The current work aims to construct models for the pyrolysis of spruce and pinewoods to allow coupled simulations of the cross‐section reduction and burning rate in fire models. Kinetic models are formulated based on thermogravimetric data and supported by the heats of pyrolysis and combustion measurements by differential scanning calorimetry and microscale combustion calorimetry, respectively. The results from these small‐scale measurements are consistent with each other, and the heats of pyrolysis and combustion are determined for the wood primary components by fitting the simulations to the experimental results. Heat release models are constructed based on the small‐scale tests, and cone calorimeter experiments are used for the estimation of the physical properties and for the heat release model validation.