A new heat transfer model based on non-equilibrium theory for annular flow condensation-part Ⅱ: Ternary zeotropic mixtures

•A new heat transfer correlation was developed for ternary zeotropic mixtures condensation.•Ternary mixture is considered as a combination of two binary mixtures.•Binary interaction coefficients are introduced and obtained by phase equilibrium property.•Two independent concentration gradients in the vapor phase were reasonably superimposed.•The MARD of the new correlation is 13.9 % for the experimental data of ternary zeotropic mixtures.