Análisis de nanofluidos para un sistema de refrigeración

Translated title of the contribution: Analysis of working nanofluids for a refrigeration system

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    Abstract

    This paper presents the analysis of nanorefrigerant fluids to improve the thermal efficiency of a refrigeration system. Simulations in ANSYS FLUENT 15.0 were performed with mixtures of refrigerants R113, R123 and R134a, with Al2O3 nanoparticles at 1 vf% and 5 vf% (vf%, fraction volume concentration), flowing through a horizontal tube with a constant wall temperature. A mixture and the k-e turbulent models were employed to obtain results of heat transfer coefficient, temperature and pressure drop for each case. Results show an increment in thermal characteristics by adding 1 vf% and 5 vf% of Al2O3 nanoparticles to the three refrigerants selected. However, the size of the nanoparticle does not affect the thermal properties of nanofluid and the pressure drop does not show a specific pattern of behavior at different concentrations of nanoparticles. Finally, the mixture of R134a with 30 nm of mean diameter size Al2O3 at 1 vf% was selected because of its higher thermal efficiency and its favorable properties as a refrigerant.

    Translated title of the contributionAnalysis of working nanofluids for a refrigeration system
    Original languageSpanish
    Pages (from-to)176-183
    Number of pages8
    JournalDYNA (Colombia)
    Volume83
    Issue number196
    DOIs
    StatePublished - Apr 2016

    Bibliographical note

    Publisher Copyright:
    © The author; licensee Universidad Nacional de Colombia.

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