Speed of Sound Results in 2,3,3,3-Tetrafluoropropene (R-1234yf) and trans-1,3,3,3-Tetrafluoropropene (R-1234ze(E)) in the Temperature Range of (260 to 360) K

Abstract

Speed of sound measurements in high purity samples of two novel candidate refrigerants, 2,3,3,3tetrafluoropropene (R-1234yf) and trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), are reported along five isotherms in the temperature range of (260 to 360) K and for pressures up to 10 MPa. The experimental technique is based on a double-reflector pulse-echo overlap method. The acoustic path lengths were obtained by a comparison with measurements in pure water carried out at atmospheric conditions. The speed of sound experimental results are characterized by an overall estimated uncertainty of less than of 0.1 %.

Solubility of trans-1,3,3,3-tetrafluoroprop-1-ene (R1234ze(E)) in pentaerythritol tetrapentanoate (PEC5) in the temperature range from 283.15 to 353.15 K

“…So far, thermodynamic and transport properties for R1234ze(E) can be found on critical state properties , vapor pressure (Grebenkov et al, 2009;Kayukawa and Fujii, 2009;McLinden et al, 2010;Nicola et al, 2012;Tanaka et al, 2010a), liquid density Tanaka et al, 2010a), vapor density Kayukawa and Fujii, 2009;McLinden et al, 2010;Tanaka and Higashi, 2010), isobaric and isochoric specific heat capacity (Kagawa et al, 2010;Tanaka et al, 2010b;Yamaya et al, 2011), speed of sound (Kano et al, 2010;Lago et al, 2011), surface tension (Grebenkov et al, 2009), liquid and vapor thermal conductivities (Grebenkov et al, 2009;Perkins and Huber, 2011), and liquid and vapor viscosities (Grebenkov et al, 2009). However, to the best of our knowledge, its behavior in solution with commonly used compressor lubricants was not reported in the literature.…”

Next generation of low global warming potential refrigerants: Thermodynamic properties molecular modeling

“…(a) Isobaric heat capacity; (b) speed of sound. Lines represent the molecular theory calculations while the green and the blue symbols represent experimental data, and the black symbols were generated using Honeywell's Genetron Properties software (version 1.3). [Color figure can be viewed at http://wileyonlinelibrary.com]…”

New Fundamental Equations of State with a Common Functional Form for 2,3,3,3-Tetrafluoropropene (R-1234yf) and trans-1,3,3,3-Tetrafluoropropene (R-1234ze(E))

“…The average deviations are, respectively, 0.08 % and 0.02 %. The data of Lago et al [30] in the liquid phase, which were not used in the fitting, show larger deviations at temperatures above 320 K. Figure 10 shows comparisons of calculated sound speeds from the equation of Richter et al [8] to those from the new equation along seven isobars. The solid lines indicate the liquid sound speeds, and the dashed lines denote the vapor sound speeds.…”

“…While the vapor sound speeds from both equations show good consistency over the whole range of temperature, the liquid sound speeds from the equation of Richter et al always show positive deviations, which are up to about 3 % at 2 MPa. The main reason for this discrepancy is that the liquid sound-speed data of Yoshitake et al [25] were not used in the development of the equation of Richter et al, instead they used the liquid-phase data by Lago et al [30]. Figure 15 shows comparisons of isobaric heat capacities calculated from the new equation to experimental values.…”