Heat transfer from an immersed fixed silver sphere to a gas fluidised bed of very small particles

Wolter Prins*, Przemyslaw Maziarka, Jonas De Smedt, Frederik Ronsse, Jan Harmsen, Wim V. van Swaaij

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
27 Downloads (Pure)


Results of unique heat transfer measurement in beds of fine, cracking catalyst particles, fluidized by air or helium gas, are compared with predictions from a theoretical model presented in the literature, and also with an earlier established empirical correlation. Moreover, the results have been related to dense phase flow conditions around a silver heat transfer probe by a simple turbulence model. A maximum heat transfer coefficient of h = 2300 W/m2K has been measured in a bed of 14μm (average diameter) particles, fluidized by helium gas. The data collected, and the model developed, can be used for the design of heat transfer tubes in fluidized beds of fine particles as for instance in fluid catalytic cracking (FCC) of crude oil heavy residues. The FCC is one of the most important conversion processes in the petroleum refineries.
Original languageEnglish
Pages (from-to)S1425-S1433
JournalThermal Science
Issue numberSuppl. 5
Publication statusPublished - 2019


  • Air
  • Fine particles
  • Fluid catalytic cracking fines
  • Fluidization
  • Heat transfer
  • Heat transfer coefficient
  • Helium
  • Immersed sphere

Cite this