Thermodynamic property measurements for hydrofluorobutenes by a magnetic levitation densimeter

Yohei Kayukawa, Takeru Kimura, Yuya Kano, Yoshitaka Fujita, Kiyoshi Saito

    研究成果: Conference contribution

    3 被引用数 (Scopus)

    抄録

    Thermodynamic cycles involving a phase transition at high temperatures such as organic Rankine cycle (ORC) or high-temperature heat pump is a key technology to realize more effective use of wasted heats. In order to achieve these technologies, a new working fluids which fit an elevated temperature range are demanded. Among a number of candidate, some hydrofluoroolefins (HFOs) were chosen and studied in the present work. A newly developed PVT property measurement system was used to measure PVT properties and vapor pressures of the test fluids. A commercially available magnetic levitation densimeter by Rubotherm GmbH was employed as a density measurement device. Wide temperature and pressure range (up to 423 K and 20 MPa) was achieved by installing originally designed cryostat system. To keep good measurement performance even under hightemperatures or high-pressures, a silicon single crystal sinker was prepared. The density and the mass of the sinker was calibrated by a state-of-the-art calibration equipment. Density measurement uncertainty is not greater than (0.009 to 0.013) %, whereas temperature and pressure measurement uncertainties are 0.018 K and 2.6 kPa, respectively.

    本文言語English
    ホスト出版物のタイトル24th IIR International Congress of Refrigeration, ICR 2015
    出版社International Institute of Refrigeration
    ページ491-496
    ページ数6
    ISBN(電子版)9782362150128
    DOI
    出版ステータスPublished - 2015
    イベント24th IIR International Congress of Refrigeration, ICR 2015 - Yokohama, Japan
    継続期間: 2015 8 162015 8 22

    Other

    Other24th IIR International Congress of Refrigeration, ICR 2015
    国/地域Japan
    CityYokohama
    Period15/8/1615/8/22

    ASJC Scopus subject areas

    • 制御およびシステム工学
    • 電子工学および電気工学
    • 機械工学
    • 凝縮系物理学

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