ABSTRACT An experimental investigation on condensation heat transfer of R290 with inside diameter of 6.3 mm in horizontal micro-fin tube was presented. Effects of each case on the condensation heat transfer coefficient of R290 were analyzed at saturation temperatures of 40°C, 50°C, and 55°C with heat flux ranging of 3–8 kW/m2, mass flux ranging of 100–250 kg/(m2·s) and vapor quality up to 1.0. The results show that the condensation heat transfer coefficients increase with mass flux and heat flux, however decrease with saturation temperature. In addition, compared with the smooth tube, the condensation heat transfer coefficients of R290 in the micro-fin tube increase by about 25%. Comparing the experimental data, the condensation heat transfer correlations of Yu et al. has high accuracy.

中文翻译：

---

R290在内径6.3mm微翅片管中的冷凝传热

摘要 对内径为 6.3 mm 的 R290 在水平微翅片管中冷凝传热进行了实验研究。在 40°C、50°C 和 55°C 的饱和温度下分析每种情况对 R290 冷凝传热系数的影响，热通量范围为 3–8 kW/m2，质量通量范围为 100–250 kg /(m2·s) 和蒸汽质量高达 1.0。结果表明，冷凝传热系数随着质量通量和热通量的增加而增加，而随着饱和温度的增加而减小。此外，与光管相比，微翅片管中R290的冷凝传热系数提高了25%左右。比较实验数据，Yu 等人的冷凝传热相关性。具有很高的准确性。