Saturated vapor pressures for refrigerants R1234ze(Z), R600a, and R134 were measured by a static-synthetic method. Twenty-five vapor pressure values for R1234ze(Z) were obtained at temperatures from 290.487 to 373.150 K. Thirteen vapor pressure values for R600a were presented over the temperature range from 289.754 to 353.150 K. Five vapor pressure values for R134 were provided at temperatures ranging from 303.150 to 343.150 K. The overall standard uncertainties of the temperature and pressure measurements were less than 5 mK and 0.0005 MPa, respectively. The maximum absolute deviations of vapor pressures for R1234ze(Z) and R600a are 0.00109 and 0.00056 MPa as compared to the Reference Fluid Thermodynamic and Transport Properties (REFPROP) database, version 9.1, respectively; and the maximum absolute deviation of vapor pressures for R134 is 0.00572 MPa as compared to the Wagner equation. The maximum relative deviations of vapor pressures for R1234ze(Z) and R600a are 0.54 and 0.15% as compared to REFPROP 9.1, respectively; and the maximum relative deviation of vapor pressures for R134 is 0.33% as compared to the Wagner equation. The average absolute relative deviations of vapor pressures for R1234ze(Z) and R600a are 0.22 and 0.081 as compared to REFPROP 9.1, respectively; and the average absolute relative deviation of vapor pressures for R134 is 0.31 as compared to the Wagner equation. The results show that a good agreement is obtained.
Experimental Measurements of Saturated Vapor Pressures for R1234ze(Z), R600a, and R134
Journal of Thermophysics and Heat Transfer ; 33 , 3 ; 779-784
2019-07-01
Article (Journal)
Electronic Resource
English
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