TY - JOUR
T1 - Heat Transfer to Non-azeotropic Mixtures of Refrigerants Flowing in a Horizontal Evaporator Tube
AU - Yoshida, Suguru
AU - Matsunaga, Takashi
AU - Mori, Hideo
AU - Ohishi, Katsumi
PY - 1990
Y1 - 1990
N2 - Heat transfer is experimentally investigated for refrigerant mixtures of R 22 and R 114 flowing in a horizontal evaporator tube. The heat transfer coefficients for the mixtures are always lower than the ‘ideal” values estimated from the heat transfer coefficients for pure refrigerants. This reduction is significant in the region where nucleate boiling contributes to the heat transfer, and is attributed to the mass transfer resistance in addition to the change of fluid properties. In the convection dominant region, the reduction in the heat transfer coefficient is assigned solely to the ‘unideal' effect of physical properties, and the heat transfer coefficients are approximately equal to those of an equivalent pure fluid with the same physical properties as the mixture. None of the correlations hitherto proposed for the heat transfer to binary mixtures successfully predict the present heat transfer coefficients.
AB - Heat transfer is experimentally investigated for refrigerant mixtures of R 22 and R 114 flowing in a horizontal evaporator tube. The heat transfer coefficients for the mixtures are always lower than the ‘ideal” values estimated from the heat transfer coefficients for pure refrigerants. This reduction is significant in the region where nucleate boiling contributes to the heat transfer, and is attributed to the mass transfer resistance in addition to the change of fluid properties. In the convection dominant region, the reduction in the heat transfer coefficient is assigned solely to the ‘unideal' effect of physical properties, and the heat transfer coefficients are approximately equal to those of an equivalent pure fluid with the same physical properties as the mixture. None of the correlations hitherto proposed for the heat transfer to binary mixtures successfully predict the present heat transfer coefficients.
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U2 - 10.1299/kikaib.56.1084
DO - 10.1299/kikaib.56.1084
M3 - Article
AN - SCOPUS:0025417040
VL - 56
SP - 1084
EP - 1089
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 524
ER -