Model predictions and experimental results on self-heating prevention of stockpiled coals

摘要

The spontaneous combustion of coal stockpiles is a serious economic and safety problem. This phenomenon is herein analysed using a TNO-model modified to predict the spontaneous heating behaviour of coal piles built with "Mezcla", a mixture of low rank coals from Teruel (Spain). The simulation carried out with the mathematical model for this coal showed that the pile porosity or voidage and wind speed play an important role, although voidage is decisive and controls the effect of the wind velocity.