Prediction of forced convective condensation of non-azeotropic refrigerant mixtures inside enhanced surface tubing

In this paper, an experimental study on the heat transfer characteristics of two phase flow condensation of pure refrigerants such as R-12 and R-22 as well as non-azeotropic refrigerant mixtures R-22/R-114 and R-22/R-152a on horizontal enhanced surface tubing is presented.The enhanced surface tubing data showed a significant enhancement of the heat transfer compared to an equivalent smooth tube depending on the mixture components and their concentrations.