In this section
@article{Yuan:2019:10.1016/j.fuel.2018.09.065,
author = {Yuan, H and Restuccia, F and Richter, F and Rein, G},
doi = {10.1016/j.fuel.2018.09.065},
journal = {Fuel},
pages = {1100--1109},
title = {A computational model to simulate self-heating ignition across scales, configurations, and coal origins},
url = {http://dx.doi.org/10.1016/j.fuel.2018.09.065},
volume = {236},
year = {2019}
}
TY - JOUR
AB - Self-heating of fuel layers can trigger ignition when the temperature of the surroundings is sufficiently high. Self-heating ignition has been a hazard and safety concern in raw materials production, transportation, and storage facilities for centuries. Hot plate and oven-basket experiments are the two most used lab-scale experiments to assess the hazard of self-heating ignition. While extensive experiments have been done to study this phenomenon, modelling of the experiments is substantially lagging behind. A computational model that can accurately simulate self-heating ignition under the two experimental configurations has not been developed yet. In this study, we build such a model by coupling heat transfer, mass transfer, and chemistry using the open-source code Gpyro. Due to the accessibility of large amount of experimental data, coal is chosen as the material for model validation. A literature review of the kinetic parameters for coal samples from different origins reveals that there is a compensation effect between the activation energy and exponential factor. Combining the compensation effect with our model, we simulate 6 different experimental studies covering the two experimental configurations, a wide range of sample sizes (heights ranging from 5mm to 126mm), and various coal origins (6 countries). The model accurately predicts critical ignition temperature (Tig) for all 24 experiments with an error below 7°C. This computational model unifies for the first time the two most used self-heating ignition experiments and provides theoretical insights to understand self-ignition for different fuels under different conditions.
AU - Yuan,H
AU - Restuccia,F
AU - Richter,F
AU - Rein,G
DO - 10.1016/j.fuel.2018.09.065
EP - 1109
PY - 2019///
SN - 0016-2361
SP - 1100
TI - A computational model to simulate self-heating ignition across scales, configurations, and coal origins
T2 - Fuel
UR - http://dx.doi.org/10.1016/j.fuel.2018.09.065
UR - http://hdl.handle.net/10044/1/64683
VL - 236
ER -
Phone:
+44 (0)20 7594 7036
Email:
g.rein@imperial.ac.uk
Address:
Department of Mechanical Engineering,
City & Guilds Building,
South Kensington Campus, London, SW7 2AZ, UK