Assessment of “comments on ‘correlations of void fraction for two-phase refrigerant flow in pipes’”

It is wrong to conclude that the mean bound model of void fraction for two-phase refrigerant flow in pipes gives better prediction than the new correlation of Xu and Fang. This conclusion was produced by selecting 36 data points from the Hashizume data source containing 257 data points which were listed in tables. Actually, the new correlation is better than the mean bound model not only for the Hashizume data, but also for a large database containing 1574 data points compiled from 15 experimental data sources. For this large database, the new correlation performs best among 43 available correlations, while the mean bound model is after the top twenty.