Heating processes during storage of Miscanthus chip piles and numerical simulations to predict self-ignition

The relationship between thermal diffusivity, energy of activation and temperature rise in subcritical self heating of fuels in simple geometries

“…Comparison between Eqs. (17) and (A2), which is a rearranged form of the equation proposed by Chen et al [18], shows that both equations bear the same structure, but with different numerical factor and different definition of the reference temperature difference and reference temperature derivative respect to time. Hence, Eq.…”

“…(9), that is the exact formulation of time dependent self heating without reactant depletion, under conditions that lead to subcritical behavior for two different substrates, namely an activated carbon [4] and an organic peroxide [16]. Calculations for a third substrate, namely Miscanthus chips [17], a biomass of energetic interest, have been performed but, for the sake of graphical clarity, their results have not been included in Figs. 8-10, but will be shown in the subsequent figures.…”

“…(17), the time depended heat transfer equation with internal heat generation, here reproduced as Eq. (1), has been numerically integrated simulating the characteristic conditions of the so called ''storage problem'' or of the oven heating experimental methods.…”

Detection of incipient self-ignition process in solid fuels through gas emissions methodology

“…A number of studies has been developed to determine the main parameters obtained from thermogravimetric and differential scanning calorimetric analyses, but this is not the only way to predict the combustion properties of materials (Everard et al, 2014). The combustion process of a sample starts even before the point at which is determined by these analyses, and the first indicator of this combustion is the gas emissions associated.…”

Analysis of the flammability properties of solid fuels

“…Also numerical simulations can be used to study the combustion processes of dust materials [86]. The combustion process starts even before the point at which is determined by these analyses, and the first indicator of this combustion is the gas emissions associated to their heating processes.…”