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Retardation of heat exchanger surfaces mineral fouling by water-based diethylenetriamine pentaacetate-treated CNT nanofluids.

Ralentissement de l’encrassement par dépôt minéral des surfaces de l’échangeur de chaleur au moyen de nanofluides CNT à base d’eau et traités au DTPA (acide diéhylène triamine penta acétique).

Auteurs : TENG K. H., AMIRI A., KAZI S. N., et al.

Type d'article : Article

Résumé

Mineral scale deposition on heat exchanging surfaces increases the thermal resistance and reduces the operating service life. The effect is usually intensified at higher temperatures due to the inverse temperature solubility characteristics of some minerals in the cooling water. Scale formation build up when dissolved salt crystallize from solution onto the heated surface, forming an adherent deposit. It is very important for heat transfer applications to cope with the fouling problems in industry. In this present study, a set of fouling experiments was conducted to evaluate the mitigation of calcium carbonate scaling by applying DTPA-treated MWCNT-based water nanofluids on heat exchanger surfaces. Investigation of additive DTPA-treated MWCNT-based water nanofluids (benign to the environment) on fouling rate of deposition was performed. 300 mg L-1 of artificially-hardened calcium carbonate solution was prepared as a fouling solution for deposit analysis. Assessment of the deposition of calcium carbonate on the heat exchanger surface with respect to the inhibition of crystal growth was conducted by Scanning Electron Microscope (SEM). The results showed that the formation of calcium carbonate crystals can be retarded significantly by adding MWCNT-DTPA additives as inhibition in the solution.

Détails

  • Titre original : Retardation of heat exchanger surfaces mineral fouling by water-based diethylenetriamine pentaacetate-treated CNT nanofluids.
  • Identifiant de la fiche : 30020522
  • Langues : Anglais
  • Source : Applied thermal Engineering - vol. 110
  • Date d'édition : 05/01/2017
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2016.08.181

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