Title of article :
Condensation heat transfer coefficients of halogenated binary refrigerant mixtures on a smooth tube
Author/Authors :
Jung، نويسنده , , Dongsoo and Song، نويسنده , , Kilhong and Kim، نويسنده , , Kyoungki and An، نويسنده , , Kwangyong، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
In this study, external condensation heat transfer coefficients (HTCs) of nonazeotropic refrigerant mixtures of HFC32/HFC134a and HFC134a/HCFC123 at various compositions were measured on a horizontal smooth tube of a 19 mm outside diameter. All data were taken at the vapor temperature of 39 °C with a wall subcooling of 3–8 °C. Test results showed that HTCs of the tested mixtures were 19.4–85.1% lower than the ideal values calculated by the mole fraction weighting of the HTCs of the pure components. A thermal resistance due to the diffusion vapor film seemed to be partly responsible for the significant reduction of HTCs with these nonazeotropic mixtures.
Keywords :
Condensation , Mélange binaire , Tube lisse , Condensation , Heat transfer coefficient , Binary mixture , Refrigerant , Smooth tube , Coefficient de transfert de chaleur , Frigorigène
Journal title :
International Journal of Refrigeration
Journal title :
International Journal of Refrigeration