Surface tension of low GWP refrigerants R1243zf, R1234ze(Z), and R1233zd(E)

Abstract

The surface tension of R1243zf, R1234ze(Z), and R1233zd(E) were measured at temperatures from 270 K to 360 K by an experimental apparatus based on the differential capillary rise method. The deviation between the measured surface tension of R134a and R245fa and the calculated surface tension with REFPROP 9.1 (Lemmon et al., 2013) was ±0.13 mN m−1, which is less than the estimated propagated uncertainty in surface tension of ±0.2 mN m−1. Eleven points, thirteen points, and ten points of surface tension data were provided for R1243zf, R1234ze(Z), and R1233zd(E), respectively, in this paper. The measured data and the estimated surface tension using the methods of Miller (1963), Miqueu et al. (2000), and Di Nicola et al. (2011) agree within the standard deviation of ±0.43 mN m−1. The empirical correlations that represent the measured data within ±0.14 mN m−1 were proposed for each refrigerant.