廃熱利用高温ヒートポンプサイクルの基本性能に関する熱力学的考察

Translated title of the contribution: Thermodynamic Analysis on High-Temperature Heat Pump Cycles for Heat Recovery

近藤 智恵子, 小山 繁

    Research output: Contribution to journalArticle

    Abstract

    To reduce energy consumption utilizing heat recovery systems is increasingly important in industrial applications. The screening of refrigerants is discussed with a case study for high temperature heat pump cycles in this study. The overall coefficients of performance of four different cycle configurations to increase water temperature up to 160 °C using waste heat of 80 °C are thermodynamically compared for several selected refrigerants. This case study suggests that a multiple stage cycle drastically reduces throttling loss in expansion valve and exergy loss in condensers, and consequently achieves the highest overall coefficient of performance (COP) among the cases with a refrigerant having the critical temperature about the target outlet water temperature. Considering many practical benefits, also a cascade cycle that performs relatively high COP can become an expedient solution.
    Translated title of the contributionThermodynamic Analysis on High-Temperature Heat Pump Cycles for Heat Recovery
    Original languageJapanese
    Pages (from-to)133-144
    Number of pages12
    Journal日本冷凍空調学会論文集
    Volume31
    Issue number2
    DOIs
    Publication statusPublished - 2014

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