Performance evaluation of a heat pump cycle using NARMs by a simulation with equations of heat transfer and pressure drop

Akio Miyara, Shigeru Koyama, Tetsu Fujii

    研究成果: Contribution to journalArticle査読

    3 被引用数 (Scopus)

    抄録

    Simulation analyses for a vapour compression heat pump cycle using nonazeotropic refrigerant mixtures (NARMs) of R22 and R114 are conducted under the condition that the heat pump thermal output and the flow rate and inlet temperatures of the heat sink and source water are given. The heat transfer coefficients of the condensation and evaporation are calculated with empirical correlations proposed by the authors. The validity of the evaluation method and the correlations is demonstrated by comparison with experimental data. The relations between the coefficient of performance (COP) and composition are shown under two conditions: (1) the constant heat transfer length of the condenser and evaporator; and (2) the constant temperature of refrigerant at the heat exchanger inlet. The COP of the NARMs is higher than that of pure refrigerant when the heat transfer lengths of the condenser and evaporator are sufficiently long.

    本文言語英語
    ページ(範囲)161-168
    ページ数8
    ジャーナルInternational Journal of Refrigeration
    16
    3
    DOI
    出版ステータス出版済み - 1993

    All Science Journal Classification (ASJC) codes

    • 建築および建設
    • 機械工学

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