Abstract: Heat transfer coefficients in nucle ate pool boiling on a smooth flat surface were measured for three kinds of binary mixtures and one kind of ternary mixtures under the saturated conditions at the steady pressure for a wi de range of heat fluxes and mixture concentrations.Refrigerants R134a,R290and R600a were used to make up binary and ternary mixtures.Five correlations were compared aga inst the present experimental date.Fujita and Tsutsui ’ scorrelation（1994）has a better agreement with the date than the others.