Eco-Friendly Refrigerants

R1234yf as environmentally friendly replacements of R134a.

R134a is ongoing a phase-down process in several countries and R1234yf can be a viable low GWP. Since new experimental data are always requested by researchers and industry to increase the global database, to assess the existing correlations, and to expand the knowledge about the refrigerant applications, in this paper more than 100 new heat transfer coefficient and frictional pressure drop data are presented during R1234yf flow boiling inside a 4 mm inner diameter smooth copper tube.