The condensation heat transfer and frictional pressure drop characteristics of the zeotropic binary mixture R32/R1123 inside two horizontal multiport extruded tubes with different channel shapes were experimentally investigated. The experiments were conducted at a mass flux of 50–400 kgm^-2s^-1 and an average saturation temperature of 40 ℃. The effects of mass flux, quality, heat flux, and channel shape on the condensation heat transfer were quantified. The heat transfer coefficient and the frictional pressure drop of R32/R1123 were compared with those of pure R32 obtained using the same test multiport extruded tubes. The heat transfer coefficient of R32/R1123 was lower than that of R32 across all mass flux and quality conditions. The frictional pressure drop of R32/R1123 was 20–30% lower than that of R32 at the same mass flux and quality conditions. The correlations of previous studies agreed well with the obtained frictional pressure drop of R32/R1123, with a mean deviation of 17%. The obtained heat transfer coefficient of R32/R1123 was predictable with a mean deviation of -5.2% using the previous correlations proposed for multiport extruded tubes considering the heat transfer reduction due to the thermal resistance caused by temperature glide.

实验研究了两种不同通道形状的水平多口挤出管内共沸二元混合物R32 / R1123的冷凝传热和摩擦压降特性。实验在50–400 kgm ^-2 s ^-1的质量通量下进行平均饱和温度为40℃。量化了质量通量，质量，热通量和通道形状对冷凝传热的影响。将R32 / R1123的传热系数和摩擦压降与使用相同测试多端口挤压管获得的纯R32的传热系数和摩擦压降进行了比较。在所有质量通量和质量条件下，R32 / R1123的传热系数均低于R32。在相同的质量通量和质量条件下，R32 / R1123的摩擦压降比R32低20–30％。先前研究的相关性与获得的R32 / R1123的摩擦压降非常吻合，其平均偏差为17％。R32 / R1123的传热系数是可预测的，平均偏差为-5。