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Amélioration du transfert de chaleur et de masse dans les nanofluides binaires (NH3-H2O).

Absorption heat and mass transfer enhancement in binary (NH3-H2O) nanofluids.

Auteurs : LEE J. K., JEONG M. Y., PARK C. W., et al.

Résumé

The objectives of this paper are to examine the effect of nano-particles on the pool type absorption heat transfer enhancement and to find the optimal conditions to design a highly effective compact absorber for NH3/H2O absorption system. The binary nanofluids which mean binary mixture with nano-sized particles are tested to apply nanofluids to the absorption system. Al(2)O(3) and carbon nanotube (CNT) particles are added to make the binary nanofluids in the binary mixture of NH3/H2O. The effect of A1(2)O(3) nano-particles and CNT on the absorption performance is studied experimentally. The experimental ranges of the key parameters are 20% of NH3 concentration, 0-0.08% (volume fraction) of CNT particles, and 0-0.06% (volume fraction) of Al(2)O(3) nanoparticles). For the NH3/H2O nanofluids, the heat transfer rate and absorption rate with 0.02 vol%. Al(2)O(3) nano-particles were found to be 28.9 and 17.8% higher than those without nano-particles, respectively. It is recommended that the concentration of 0.02 vol% of Al(2)O(3) nano-particles be the best candidate for NH3/H2O absorption performance enhancement in the present conditions. It is expected that this study will give some basic idea to understand the heat and mass transfer enhancement mechanism in multi-components nanofluids.

Détails

  • Titre original : Absorption heat and mass transfer enhancement in binary (NH3-H2O) nanofluids.
  • Identifiant de la fiche : 2009-0150
  • Langues : Anglais
  • Source : Cryogenics and refrigeration. Proceedings of ICCR'2008.
  • Date d'édition : 05/04/2008

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