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Prediction of the heat transfer in circulating fluidized beds without considering the influence of radiation

  • O. Molerus
  • K.-E. Wirth
Chapter
  • 293 Downloads
Part of the Powder Technology Series book series (POTS, volume 11)

Abstract

The non-dimensional plot of the experimentally determined heat transfer coefficients in the form of Nusselt number versus Archimedes number reveals that the thermal properties of the solids have no influence on the heat flux transferred (Fig. 14.5). For example, glass beads with a particle size of 58.5 μm at 50 bar (5 MPa) static pressure have the same Archimedes number as bronze particles with a size of 63.7 μ at 10 bar (1 MPa) static pressure. The corresponding Nusselt number for the same pressure drop number is the same for the two gas/solid systems. This means the particles do not limit the heat transfer by their thermal properties.

Keywords

Heat Transfer Reynolds Number Heat Transfer Coefficient Nusselt Number Minimum Fluidization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • O. Molerus
    • 1
  • K.-E. Wirth
    • 1
  1. 1.Lehrstuhl für MechanischeVerfahrenstechnik der Universität Erlangen-NürnbergGermany

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