Isochoric p–ρ–T Measurements for trans-1,3,3,3-Tetrafluoropropene [R-1234ze(E)] and Trifluoroiodomethane (R13I1) at Temperatures from (205 to 353) K under Pressures up to 40 MPa

Abstract

Experimental liquid phase data on the pressure–density–temperature relation are reported for two refrigerants with considerably low global warming potential (GWP) and zero ozone depletion potential (ODP). The data for trans-1,3,3,3-tetrafluoropropene [R-1234ze(E)] and trifluoroiodomethane (CF3I) were obtained with a constant volume apparatus at temperatures from (205 to 353) K and from (208 to 353) K, respectively, and at pressures from (1 to 40) MPa. The data for R-1234ze(E) substantially extend the temperature–pressure region covered with experimental p–ρ–T data, and for trifluoroiodomethane they are the first p–ρ–T data available in the open literature. The combined uncertainty at the 0.95 confidence level of the reported density data takes its maximum value at the lower end of the temperature interval; 1.4 kg·m–3 for R-1234ze(E) and 2.4 kg·m–3 for CF3I, which is about 10–3ρ for both substances. The root-mean-square deviation of the reported data from the Helmholtz free energy equation of state fitted ...