An Experimental Study of Condensation of Nonazeotropic Refrigerant Mixtures HCFC22+CFC114 inside a Horizontal Smooth Tube

Shigeru Koyama, Lei Gao, Naoki Imamura, Tetsu Fujii

    Research output: Contribution to journalArticle

    Abstract

    An experimental study of condensation of nonazeotiopic refrigerant mixtures (NARMs) of HCFC22 and CFC114 inside a horizontal smooth tube has been carried ont. The local Nusselt number of pure refrigerants of HCFC22 and CFC114 is correlated well with the equation obtained by modifying a semi-empirical equation of Nozu et al., while that of NARMs is lower than the value predicted from the correlation equation, and the magnitude of its decrease depends on the mass velocity and the composition of NARMs. By assuming that the condensate heat transfer coefficient of NARMs can be expressed by the correlation equation for pure refrigerants, temperature and mass fractions of vapor and liquid at the vapor-liquid interface are evaluated, and a correlation equation of the local vapor mass transfer coefficient is obtained. The combination of the correlation equations for condensate heat transfer and vapor mass transfer can accurately predict the heat transfer characteristics of NARMs in a double-tube counterflow condenser.

    Original languageEnglish
    Pages (from-to)2032-2038
    Number of pages7
    JournalTransactions of the Japan Society of Mechanical Engineers Series B
    Volume57
    Issue number538
    DOIs
    Publication statusPublished - Jan 1 1991

    Fingerprint

    refrigerants
    Refrigerants
    Condensation
    condensation
    tubes
    Vapors
    vapors
    mass transfer
    condensates
    Mass transfer
    heat transfer
    Condenser tubes
    semiempirical equations
    Heat transfer
    liquid-vapor interfaces
    counterflow
    condensers
    Liquids
    Nusselt number
    heat transfer coefficients

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanical Engineering

    Cite this

    An Experimental Study of Condensation of Nonazeotropic Refrigerant Mixtures HCFC22+CFC114 inside a Horizontal Smooth Tube. / Koyama, Shigeru; Gao, Lei; Imamura, Naoki; Fujii, Tetsu.

    In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 57, No. 538, 01.01.1991, p. 2032-2038.

    Research output: Contribution to journalArticle

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