Thermal conductivity measurements of pure R1243zf and binary mixtures R32 + R1234yf were conducted in the homogeneous liquid vapour phases with a transient hot-wire technique. The mole fractions are 0.25, 0.50, 0.75 both systems. temperature range was from (264.1 to 405.6) K pressures ranging between (0.9 6.1) MPa. apparatus validated CO2 regions. relative combined expanded uncertainty (k = 2) ...

A literature review on the two-phase flow inside plain tubes, especially for refrigerant R1234yf, is conducted in this research. The boiling, condensation, and visualization of low GWP were examined experimentally to measure heat transfer coefficients pressure drop refrigerant, also present a pattern map. measurements carried out smooth circular tubes with internal diameters 8.2 mm mass velocit...