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Measurements of Specific Heat Capacity of Gaseous R-143a Using a Flow Calorimeter

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The isobaric specific heat capacity (c p ) was measured for R-143a (1,1,1-trifluoroethane) in the gas phase. Ten measurements for R-143a were obtained at temperatures from 311 to 343 K and at pressures from 1.6 to 2.4 MPa. Some of them are close to the saturation curve. The expanded uncertainty (k = 2) of the temperature measurements is estimated to be less 25 mK, and that of the pressure measurements is less 8 kPa. The expanded uncertainty for c p is estimated to range from 9 to 32 J·kg−1·K−1. Also, the experimental data were evaluated with available equations of state.

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Authors and Affiliations

  1. Department of Mechanical Systems Engineering, National Defense Academy, Yokosuka, 239-8686, Japan

    N. Kagawa & A. Matsuguchi

  2. Department of System Design Engineering, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan

    K. Watanabe

Authors
  1. N. Kagawa
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  2. A. Matsuguchi
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  3. K. Watanabe
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Correspondence to N. Kagawa.

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Kagawa, N., Matsuguchi, A. & Watanabe, K. Measurements of Specific Heat Capacity of Gaseous R-143a Using a Flow Calorimeter. Int J Thermophys 28, 481–489 (2007). https://doi.org/10.1007/s10765-007-0186-y

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  • DOI: https://doi.org/10.1007/s10765-007-0186-y

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