Low-Order Modeling of Internal Heat Transfer in Biomass Particle Pyrolysis
Low-Order Modeling of Internal Heat Transfer in Biomass Particle Pyrolysis
复制标题
生物质颗粒热解中内部传热的低阶模拟
DOI：
10.1021/acs.energyfuels.6b00554
复制
发表时间：
2016
期刊：
影响因子：
5.3
通讯作者：
C. Daw
中科院分区：
文献类型：
--
作者：
G. Wiggins;Peter N. Ciesielski;C. Daw
我们提出了一种计算高效的一维模拟方法，用于快速热解条件下的生物质颗粒加热。我们的方法是基于确定具有真实形态的生物质颗粒模型中传导热传输的速度限制、几何和结构因素，以开发适当行为的低阶近似。将我们的一维方法预测的瞬时温度趋势与木质生物质颗粒的三维模拟进行比较，如果使用适当的等效球径和整体热物性，则显示出很好的一致性。我们的结论是，对于快速热解典型的颗粒大小和加热区域，即使考虑了可变尺寸、非球面形状、各向异性导电率和复杂的特定物种的内部孔隙几何结构，也可以以合理的精度和最小的计算开销来模拟生物质颗粒加热。
We present a computationally efficient, one-dimensional simulation methodology for biomass particle heating under conditions typical of fast pyrolysis. Our methodology is based on identifying the rate limiting geometric and structural factors for conductive heat transport in biomass particle models with realistic morphology to develop low-order approximations that behave appropriately. Comparisons of transient temperature trends predicted by our one-dimensional method with three-dimensional simulations of woody biomass particles reveal good agreement, if the appropriate equivalent spherical diameter and bulk thermal properties are used. We conclude that, for particle sizes and heating regimes typical of fast pyrolysis, it is possible to simulate biomass particle heating with reasonable accuracy and minimal computational overhead, even when variable size, aspherical shape, anisotropic conductivity, and complex, species-specific internal pore geometry are incorporated.