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 October 9, 2025)
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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
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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 soundCitation
International Journal of Thermophysics
Volume
45
Pub Type
Journals
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Created October 16, 2024, Updated March 26, 2025