Abstract
A correlation, which does not involve any empirical constants dependent on refrigerants, is developed for forced convective boiling heat transfer inside a smooth tube. The correlation is based on the model where the heat transfer coefficient of a mixture is lower than that of the equivalent pure fluid due to the mixture effects on nucleate boiling and to the heat transfer resistance in the vapor phase. The predicted heat transfer coefficients agreed with the experimental data with mean deviation of 5.9 and 6.5% for pure refrigerants (R11, R114, R123, R12) and binary mixtures (R11/R114, R123/R134a, R11/R12), respectively.
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