期刊
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
卷 134, 期 1, 页码 -出版社
ASME
DOI: 10.1115/1.4004842
关键词
packed bed; solar energy; gasification; chemical reactors; effective properties; tomography; heat transfer; mass transfer
资金
- Swiss National Science Foundation [200021-115888]
- European Commission [212470]
The effective heat and mass transport properties of a porous packed bed of particles undergoing a high-temperature solid-gas thermochemical transformation are determined. The exact 3D geometry of the reacting porous media is obtained by high-resolution computed tomography. Finite volume techniques are applied to solve the governing conservation equations at the pore-level scale and to determine the effective transport properties as a function of the reaction extent, namely, the convective heat transfer coefficient, permeability, Dupuit-Forchheimer coefficient, tortuosity, and residence time distributions. These exhibit strong dependence on the bed morphological properties (e.g., porosity, specific surface area, particle size) and, consequently, vary with time as the reaction progresses. [DOI: 10.1115/1.4004842]
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