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Compressed Liquid Densities and Helmholtz Energy Equation of State for Fluoroethane (R161)

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Abstract

In this study, compressed liquid densities of Fluoroethane (R161, CAS No. 353-36-6) were measured using a high-pressure vibrating-tube densimeter over the temperature range from (283 to 363) K with pressures up to 100 MPa. A Helmholtz energy equation of state for R161 was developed from these density measurements and other experimental thermodynamic property data from the literature. The formulation is valid for temperatures from the triple point temperature of 130 K to 420 K with pressures up to 100 MPa. The approximate uncertainties of properties calculated with the new equation of state are estimated to be 0.25 % in density, 0.2 % in saturated liquid density between 230 K and 320 K, and 0.2 % in vapor pressure below 350 K. Deviations in the critical region are higher for all properties. The extrapolation behavior of the new formulation at high temperatures and high pressures is reasonable.

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Acknowledgments

The authors are grateful to Eric W. Lemmon from NIST for his kind help and useful suggestions. The authors acknowledge the financial support of the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20130201110046), the National Natural Science Foundation of China (No. 51176154), and Natural Science Foundation of Changchun Normal University (No. 2014007).

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Authors and Affiliations

  1. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xi’an Jiaotong University, Xi’an, 710049, China

    Haiyan Qi, Dan Fang, Kehui Gao, Xianyang Meng & Jiangtao Wu

  2. Department of Physics, Changchun Normal University, Changchun, 130032, China

    Haiyan Qi

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  1. Haiyan Qi
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  2. Dan Fang
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  3. Kehui Gao
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  4. Xianyang Meng
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Correspondence to Xianyang Meng.

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Qi, H., Fang, D., Gao, K. et al. Compressed Liquid Densities and Helmholtz Energy Equation of State for Fluoroethane (R161). Int J Thermophys 37, 55 (2016). https://doi.org/10.1007/s10765-016-2061-1

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