Mitigation of ice crystallization fouling in stationary and circulating liquid-solid fluidized bed heat exchangers

P. Pronk, C. A. Infante Ferreira*, G. J. Witkamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Liquid-solid fluidized bed heat exchangers are attractive ice crystallizers since they are able to mitigate ice crystallization fouling and exhibit high heat transfer coefficients. Experiments show that the fouling removal ability of stationary fluidized beds increases with decreasing bed voidage (95-80%) and increasing particle size (2-4 mm). The removal of ice crystallization fouling appears to be more effective in circulating fluidized beds, especially at high circulation rates. Fouling removal is realized by both particle-wall collisions and pressure fronts induced by particle-particle collisions. A comparison between ice crystallization experiments and impact characteristics shows that the removal rate is proportional to the impulse exerted on the wall. A model based on these phenomena is discussed and predicts the transition temperature difference for ice crystallization fouling in both stationary and circulating fluidized beds with an average absolute error of 9.2%.

Original languageEnglish (US)
Pages (from-to)403-411
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume53
Issue number1-3
DOIs
StatePublished - Jan 15 2010
Externally publishedYes

Keywords

  • Crystallization
  • Fouling
  • Ice
  • Liquid-solid fluidization
  • Slurries

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

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