二成分蒸気の鉛直平滑管内凝縮に関する実験

概要

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An experimental study of condensation of nonazeotropic refrigerant mixtures (NARMs) of HCFC22 and CFC114 inside a vertical smooth tube has been carried out. The local Nusselt number of a pure refrigerant of HCFC22 is correlated well with the equation which is obtained by modifying an empirical equation proposed by Uehara et al., while that of NARMs is lower than the value predicted from the modified correlation equation; the difference being dependent on the mass velocity and the composition of NARMs. By assuming that the condensate heat transfer coefficient of NARMs can be expressed by the correlation equation for pure refrigerants, temperature and mass fractions of vapor and liquid at the vapor-liquid interface are evaluated. Then, the local vapor mass transfer coefficient is obtained.
九州大学の論文
1993-03-20