... range and within 0.5 K for heat fluxes less than 75 kW/m 2 . The superheat for the refrigerant/lubricant mixtures at approximately 95 kW/m 2 is roughly 7.5 K greater than that for pure R134a indicating a heat transfer degradation with respect to pure R134a. The heat transfer degradation decreases...

... measurements and a refrigerant\lubricant mixture pool-boiling model were used to suggest that increases in thermal conductivity and lubricant viscosity are mainly responsible for the heat transfer enhancement due to nanoparticles. Particle size measurements were used to suggest that particle agglomeration...

... 02 2009 boiling copper compounds heat transfer lubricants multiphase flow nanofluidics nanoparticles polymer blends refrigerants additives boiling copper (II) oxide enhanced heat transfer nanotechnology refrigerants refrigerant/lubricant mixtures In recent years...