Abstract
A simple analytical model is developed for fire growth of thermally thin corrugated paperboard in a parallel panel configuration that simulates the vertical flues between stored commodities in a rack storage arrangement. It is based on a semi-empirical model for radiation-dominated flame heat transfer to panels in terms of: (1) fuel flame sootiness, (2) fire heat release rates, and (3) panel width to separation aspect ratios. The model input properties include: heat of combustion, minimum heat of gasification, yield of smoke, and critical heat flux obtained from the Fire Propagation Apparatus. The effect of moisture on fire growth rate is incorporated in the model. The predictions of the model are compared with experimental data on the rate of chemical heat release measured for the upward fire growth of vertical corrugated paperboard samples (0.305 m by 2.4 m) placed opposite one another in a parallel panel configuration (0.153 m apart). The model predictions of exponential fire growth time constant agree reasonably well with the experimentally determined values.
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