Characteristics of calcium carbonate fouling on heat transfer surfaces under the action of electric fields

Zhiming Xu, Hongliang Chang, Bingbing Wang, Jingtao Wang, Qi Zhao

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7 Citations (Scopus)
114 Downloads (Pure)

Abstract

The present study examined the effect of electric fields in calcium carbonate (CaCO3) scale formation on a heat transfer surface. The effects of electric fields ranging from 0 V to 4000 V on the fouling properties of CaCO3 were investigated. Results showed that the optimal electric voltage was approximately 500 V, at which the asymptotic value of fouling resistance and the deposited weight were minimal and corresponded to 52.8 % and 61.3 % reductions, respectively, compared with the results recorded at 0 V. At higher voltages of 3000 V or 4000 V, the asymptotic value of fouling resistance and the weight of fouling deposits increased relative to those obtained at 0 V. The scanning electron microscope images of the fouling deposits obtained at 0 V showed mainly aragonites with sharp and needle-like crystal structures. The structure of CaCO3 fouling changed from aragonites to spherical vaterites as the applied voltage was increased.

Original languageEnglish
Pages (from-to)3445-3451
Number of pages7
JournalJournal of Mechanical Science and Technology
Volume32
Issue number7
DOIs
Publication statusPublished - 27 Jul 2018

Keywords

  • Anti-fouling
  • CaCO fouling
  • Electric field
  • Fouling characteristics

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