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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

Published

Author(s)

Aaron Rowane, Richard Perkins

Abstract

Speed of sound data, measured using a dual-path pulse-echo instrument, are reported for three binary mixtures of 1,1-difuoroethylene (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. Signifcant 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
Citation
International Journal of Thermophysics
Volume
45

Citation

Rowane, A. and Perkins, R. (2024), Speed of Sound Measurements of Binary Mixtures of 1,1-Difluoroethylene (R-1132a) + Propane and Derived Speed of Sound of Pure R-1132a, International Journal of Thermophysics, [online], https://doi.org/10.1007/s10765-024-03431-2, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958284 (Accessed April 1, 2025)

Issues

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Created October 16, 2024, Updated March 26, 2025