Condensation heat transfer characteristics of R1234yf inside multiport mini-channel tube

摘要

R1234yf is an HFO that is used as a good candidate for replacing R134a in automotive air conditioning, and it has a low global warming potential of 4 and zero ODP. R1234yf has cooling performance that is 5% less than R134A but is significantly better for the environment. This research report measured and analyzed the heat transfer performances of R1234yf in the condensation process inside two different multiport mini-channel tubes are horizontal. Experimental data were obtained for mass fluxes from (50 to 500) kg/m~2s, and heat fluxes from (3 to 12) kW/m~2 at a fixed saturation temperature of 48 °C. The influence of flow distribution of R1234yf on the was analyzed. Finally, a new heat transfer coefficient correlation was developed from the experimental data.