High-Temperature Solids-Gas Interactions

  • M. Q. Brewster


This paper reviews recent studies of high-temperature, solid-particle, direct-contact heat transfer devices. Three different particle-gas flow configurations are covered: fluidized bed, entrained flow, and free-falling particle flow. Several preliminary experimental studies have been conducted using each of these flow configurations. These are discussed and comparisons between them are made. Some theoretical modeling of the radiative transport and gas-particle heat transfer has also been done. These various models are discussed and a review of pertinent techniques for modeling radiative transport in particulate media is given. Based on several modeling efforts some recommendations for improving solids-gas direct-contact heat transfer are given. These include promotion of lateral particle mixing in entrained and free-falling flows to reduce infrared emission losses and investigating “windowless” means of containment for fluidized bed solar receivers.


Radiative Transfer Equation Effective Emissivity Discrete Ordinate Method Effective Absorptivity Entrain Flow 
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© Springer-Verlag Berlin Heidelberg 1988

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  • M. Q. Brewster

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