Expressions simplifiées des coefficients de transfert sur un tube absorbeur partiellement humide

Translated title of the contribution: Simplified expressions of the transfer coefficients on a partially wet absorber tube

    Research output: Contribution to journalArticle

    Abstract

    A simplified analytical solution of the governing differential equation for falling film absorption around a smooth horizontal tube is developed and compared to numerical results and experimental data from literature. Besides the assumption of a linear temperature profile, linear interfacial equilibrium together with the hypotheses of small mass-penetration are applied at the film interface to reach closed analytical expressions of the temperature and mass fraction fields, which can be used to estimate the local and average heat and mass transfer coefficients within falling film absorbers and generators. The noteworthy agreement with numerical results supports the simplifying assumptions introduced, and the inclusion of partial-wetting effects brings the results closer to the experimental data from previous literature, widening the applicability of this formulation.

    Original languageFrench
    JournalInternational Journal of Refrigeration
    DOIs
    Publication statusAccepted/In press - 2018 Jan 1

    Fingerprint

    Heat transfer coefficients
    Wetting
    Differential equations
    Mass transfer
    Temperature

    Keywords

    • Absorption
    • Analytical solution
    • Falling film
    • Heat and mass transfer
    • Partial
    • Wetting

    ASJC Scopus subject areas

    • Building and Construction
    • Mechanical Engineering

    Cite this

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    title = "Expressions simplifi{\'e}es des coefficients de transfert sur un tube absorbeur partiellement humide",
    abstract = "A simplified analytical solution of the governing differential equation for falling film absorption around a smooth horizontal tube is developed and compared to numerical results and experimental data from literature. Besides the assumption of a linear temperature profile, linear interfacial equilibrium together with the hypotheses of small mass-penetration are applied at the film interface to reach closed analytical expressions of the temperature and mass fraction fields, which can be used to estimate the local and average heat and mass transfer coefficients within falling film absorbers and generators. The noteworthy agreement with numerical results supports the simplifying assumptions introduced, and the inclusion of partial-wetting effects brings the results closer to the experimental data from previous literature, widening the applicability of this formulation.",
    keywords = "Absorption, Analytical solution, Falling film, Heat and mass transfer, Partial, Wetting",
    author = "Niccolo Giannetti and Seiichi Yamaguchi and Kiyoshi Saito",
    year = "2018",
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    doi = "10.1016/j.ijrefrig.2018.07.007",
    language = "French",
    journal = "International Journal of Refrigeration",
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    AU - Giannetti, Niccolo

    AU - Yamaguchi, Seiichi

    AU - Saito, Kiyoshi

    PY - 2018/1/1

    Y1 - 2018/1/1

    N2 - A simplified analytical solution of the governing differential equation for falling film absorption around a smooth horizontal tube is developed and compared to numerical results and experimental data from literature. Besides the assumption of a linear temperature profile, linear interfacial equilibrium together with the hypotheses of small mass-penetration are applied at the film interface to reach closed analytical expressions of the temperature and mass fraction fields, which can be used to estimate the local and average heat and mass transfer coefficients within falling film absorbers and generators. The noteworthy agreement with numerical results supports the simplifying assumptions introduced, and the inclusion of partial-wetting effects brings the results closer to the experimental data from previous literature, widening the applicability of this formulation.

    AB - A simplified analytical solution of the governing differential equation for falling film absorption around a smooth horizontal tube is developed and compared to numerical results and experimental data from literature. Besides the assumption of a linear temperature profile, linear interfacial equilibrium together with the hypotheses of small mass-penetration are applied at the film interface to reach closed analytical expressions of the temperature and mass fraction fields, which can be used to estimate the local and average heat and mass transfer coefficients within falling film absorbers and generators. The noteworthy agreement with numerical results supports the simplifying assumptions introduced, and the inclusion of partial-wetting effects brings the results closer to the experimental data from previous literature, widening the applicability of this formulation.

    KW - Absorption

    KW - Analytical solution

    KW - Falling film

    KW - Heat and mass transfer

    KW - Partial

    KW - Wetting

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