音速測定による混合冷媒の気相域における熱力学性質に関する研究 Determination on Thermodynamic Properties from Speed-of-Sound Measurements for Gaseous Refrigerant Mixtures

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著者

    • 宝積 勉 HOZUMI Tsutomu
    • 東京工業大学工学部機械科学科 Department of Mechanical Engineering and Science, Faculty of Engineering, Tokyo Institute of Technology
    • 佐藤 春樹 SATO Haruki
    • 慶應義塾大学理工学部システムデザイン工学科 Department of System Design Engineering, Faculty of Science and Technology, Keio University
    • 渡部 康一 WATANABE Koichi
    • 慶應義塾大学理工学部システムデザイン工学科 Department of System Design Engineering, Faculty of Science and Technology, Keio University

抄録

This paper proposes a procedure on the thermodynamically consistent determination of virial coefficients from speed-of-sound measurements. Using the speed-of-sound values for gaseous Difluoromethane (R-32) +Pentafluoroethane (R-125), R -32+ 1, 1, 1, 2 - tetrafluoroethane (R-134a), R125/134a and R-32/125/134a which have already been reported in the previous paper, the second virial coefficients of R-32/125, R -32/134a, R-125/134a and R-32/125/134a were determined by means of thermodynamic relation among the virial coefficients of two different virial equations of state with respect to pressure and density. The present virial equation of state regarding density expansion can represent not only the speed-of-sound values but also the PρT-data for R-32/125, R -32/134a, R -125/134a and R-32/125/134a. The deviation of the speed-of-sound data from the virial equation of state is about±100ppm.And the deviation of the PρT-measurements by Kleemiss and Tillner-Roth (1997) from the virial equation of state against density is about ±0.l%. The behavior of the second virial coefficient is shown at the available compositions.

収録刊行物

  • 日本冷凍空調学会論文集  

    日本冷凍空調学会論文集 16(1), 89-96, 1999-03-31 

    Japan Society of Refrigerating and Air Conditioning Engineers

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各種コード

  • NII論文ID(NAID)
    10002715132
  • NII書誌ID(NCID)
    AA11125910
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13444905
  • NDL 記事登録ID
    4844857
  • NDL 雑誌分類
    ZN14(科学技術--機械工学・工業--熱機関)
  • NDL 請求記号
    Z16-1394
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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