1,1-二氟乙烯 (R-1132a) + 丙烷二元混合物的声速测量结果和纯 R-1132a 的推导声速

IF 2.5 4区工程技术 Q3 CHEMISTRY, PHYSICAL

International Journal of Thermophysics Pub Date : 2024-10-16 DOI:10.1007/s10765-024-03431-2

Aaron J. Rowane, Richard A. Perkins

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引用次数: 0

摘要

报告了使用双路径脉冲回波仪器测量的 1,1-二氟乙烯（R-1132a）与丙烷的三种二元混合物的声速数据，温度范围为 230 至 345 K，压力范围为略高于气泡曲线到最大压力 50 MPa。在对纯 R-1132a 进行测量时，脉冲回波信号出现明显衰减。因此，在 R-1132a 样品中掺入了分子分数为 0.0274 至 0.0887 的丙烷，并使用丙烷 + R-1132a 混合物数据来推导纯 R-1132a 的声速。数据与 R-1132a 的初步状态方程进行了比较，偏差在 2 % 到 8 % 之间。这表明需要对初步的 R-1132a 态方程进行修改，以更好地表示声速。

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Speed of Sound Measurements of Binary Mixtures of 1,1-Difluoroethylene (R-1132a) + Propane and Derived Speed of Sound of Pure R-1132a

Speed of sound data, measured using a dual-path pulse-echo instrument, are reported for three binary mixtures of 1,1-difluoroethylene (R-1132a) with propane at temperatures ranging from 230 to 345 K and pressures ranging from slightly above the bubble curve to a maximum pressure of 50 MPa. Significant attenuation of the pulse-echo signals was observed for measurements on pure R-1132a. Therefore, the R-1132a sample was doped with propane at mole fractions ranging from 0.0274 to 0.0887 and the propane + R-1132a mixture data was used to derive sound speeds for pure R-1132a. The data were compared to a preliminary equation of state for R-1132a, and deviations ranged from 2 % to 8 %. This demonstrates that the preliminary R-1132a EoS needs to be refit to better represent the speed of sound.

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来源期刊

International Journal of Thermophysics 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

179

审稿时长

5 months

期刊介绍： International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.