中国电机工程学报2012，Vol.32Issue(2)：61-66,6.
单个球形木材颗粒热解过程数值模拟
Numerical Simulation of Pyrolysis of a Wood Particle
孟庆敏 1陈晓平 1刘道银1
作者信息
- 1. 东南大学能源与环境学院,江苏省南京市210096
- 折叠
摘要
Abstract
An unsteady, one-dimensional model was developed to study the pyrolysis of a single wood particle. Mass, momentum and energy conservations of gas and solid within the particle were considered. The gas velocity in the particle was modeled using Darcy＇s law for fluid through a porous medium. The heat transfer model included heat conduction and convection inside the particle, and convection and radiation between the particle and the hot gas. The kinetic model consisted of primary pyrolysis reaction. In order to check accuracy of the model, the time-resolved predictions of temperature and residual mass fraction were compared with published experimental results, which gave good agreement. Then, the model was used to investigate the effects of inlet gas temperature and particle diameter on the wood particle pyrolysis. The results showed that the pyrolysis time decreased when the inlet gas temperature increased. At the same dimensionless diameter, the temperature of the small particle increased and reached uniform rapidly. The time-resolved variation of the residual mass fraction was similar with that of the temperature.关键词
木材/颗粒/热解/数值模拟Key words
wood/particle/pyrolysis/numericalsimulation分类
能源科技引用本文复制引用
孟庆敏,陈晓平,刘道银..单个球形木材颗粒热解过程数值模拟[J].中国电机工程学报,2012,32(2):61-66,6.
