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2011 | 32 | 2 | 91-100

Article title

Scaling of flow phenomena in circulating fluidized bed boilers



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The paper presents an overview of scaling models used for determining hydrodynamic parameters of Circulating Fluidized Bed boilers. The governing equations and the corresponding dimensionless numbers are derived and presented for three different approaches to the scaling law of fluidized beds: classical dimensional analysis, differential equations and integrated solutions and experimental correlations. Some results obtained with these equations are presented. Finally, the capabilities and limitations of scaling experiments are discussed.










Physical description


1 - 6 - 2011
11 - 7 - 2011


  • Faculty of Environmental Protection and Engineering, Department of Heating, Ventilation and Air Protection, Częstochowa University of Technology, ul. Dąbrowskiego 69, 42-200 Częstochowa, Poland


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  • Litka T., Glicksman L.R., 1985. The influence of particle mechanical properties on bubble characteristics and solid mixing in fluidized beds, Powder Technol., 42, 231-239. DOI:10.1016/0032-5910(85)80058-9[Crossref]
  • Shi D., Reh L., 2005. Similarities in CFB fluid dynamics, In: Cen K. (Ed.), Circulating Fluidized Bed Technology VIII. International Academic, Beijing, 283-290.
  • Teplitskiy Yu.S., Ryabov G.A., 1999. Scaling in circulating fluidized bed: particle concentration and heat transfer coefficient in a transport zone. Int. J. Heat Mass Transf., 42, 4065-4075. DOI:10.1016/S0017-9310(99)00048-4[Crossref]
  • van der Meer E.H., 1997. Riser exits and sealing of circulating fluidized beds, PhD Thesis. University of Cambridge, Cambridge, UK.
  • Yang W.C. (Ed.), 2003. Handbook of Fluidization and Fluid-Particle Systems. Marcel Dekker, Inc., New York, 2003.

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