Viscosity of binary refrigerant mixtures of R32 + R1234yf and R32 + R1243zf

Viscosity measurements of six binary mixtures R32+R1234yf and R32+R1243zf at different compositions were conducted in the homogenous liquid gas phases with a vibrating-wire viscometer temperature range from (254 to 383) K pressures (1 8) MPa. The measurement system was verified pure carbon dioxide R32 phases. relative combined expanded uncertainties (k = 2) experimental viscosity are generally 3.2% 5.0%. measured viscosities agree calculations extended corresponding state model implemented software package REFPROP 10.0 within 10% mainly 5%. parameters residual entropy scaling incorporating cubic-plus-association equation (RES-CPA model) for R1243zf + mixture determined. deviation values calculated RES-CPA is 6% phase phase.