Measurements of the Vapor-liquid Coexistence Curve and Determination of the Critical Parameters for Refrigerant 13B1

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概要

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• measurements of the vapor-liquid coexistence curve in the critical region for Refrigerant 13B1 (CBrF_3) were made by visual observation of the disappearance of the meniscus at the vapor-liquid interface within an optical cell. Twenty-two saturated densities for temperatures between 332 and 340 K were obtained in the range of densities 376 to 1108 kg/m^3. The experimental uncertainties in temperature and density measurements were estimated within ±10 mK and ±0.5%,respectively. Based upon the results along the coexistence curve, the critical temperature T_c, the critical density p_c and the critical pressure P_c for R 13B1 were determined to be 340.08 K. 764 kg/m^3 and 3.956 MPa, respectively, in consideration of the disappearing meniscus level as well as the intensity of the critical opalescence. In addition, the critical exponent β was determined to be 0.340 and the correlation of the vapor-liquid coexistence curve for R 13B1 was established.

• 一般社団法人日本機械学会の論文

著者

• Watanabe Kazuto

  Safety Assessment Department Chugai Pharmaceutical Co. Ltd.

• Watanabe K

  Univ. Tokyo Tokyo Jpn

• HIGASHI Yukihiro

  Department of Mechanical Engineering, Iwaki Meisei University

• UEMATSU Masahiko

  Department of Mechanical Engineering, Keio University

• WATANABE Koichi

  Department of Mechanical Engineering, Keio University

• HIGASHI Yukihiro

  Graduate School of Engineering, Keio University

• Uematsu M

  Keio Univ. Yokohama Jpn

• Uematsu Masahiko

  Department Of Machanical Engineering Keio University

• Higashi Yukihiro

  Department Of Mechanical Engineering Iwaki Meisei University

• Watanabe Koichi

  Department Of Mechanical Engineering Faculty Of Engineering Keio University.

• Watanabe Koichi

  Department Of Materials Chemistry Faculty Of Engineering Gunma University

• WATANABE Koichi

  Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo:CREST, Japan Science and Technology Agency(JST)

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