二成分混合冷媒のプレートフィン凝縮器内での伝熱特性の予測計算法

Translated title of the contribution: Prediction of Heat Transfer Characteristics of Binary Refrigerant Mixtures in a Plate-Fin Condenser

屋良 朝康, 小山 繁

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The heat transfer characteristics of binary refrigerant mixtures in a plate-fin condenser are experimentally investigated using a vapor compression heat transformer, in which binary refrigerant mixtures of R 134a/ R 123 are used as the working fluid and water is used as both heat sink and source. Pure refrigerants of R 22 and R 134a are also tested as the working fluid. The experimental ranges of heat flux and mass velocity are from 2 to 20 kW/m<Sup>2</Sup> and from 50 to 100 kg/m<Sup>2</Sup>s, respectively. The heat transfer characteristics of the condensation and vapor single-phase flow of pure and mixed refrigerants are discussed, and empirical correlation equations of the condensate heat transfer and vapor single-phase heat transfer are proposed. The correlation equation of water-side heat transfer is also presented. Combining these correlation equations with a correlation equation of vapor mass transfer based on the Chilton-Colburn analogy, a prediction model for condensation of the binary refrigerant mixtures in a plate-fin heat exchanger is developed based on the assumption that the phase equilibrium is only established at the vapor-liquid interface. The calculation results for the pure and mixed refrigerants agree well with the present experimental data. The mass transfer characteristics are also revealed from the calculation results.
    Translated title of the contributionPrediction of Heat Transfer Characteristics of Binary Refrigerant Mixtures in a Plate-Fin Condenser
    Original languageJapanese
    Pages (from-to)187-197
    Number of pages11
    Journal日本冷凍空調学会論文集
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - Sep 30 2006

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