对光滑水平管内低质量流量下的准局部冷凝换热系数进行了实验和分析研究。实验用制冷剂R134a在光滑的商用铜管中进行，铜管外径为0.5英寸（12.7毫米）。选择的操作条件应确保试验段中的两相流符合分层波浪状态。研究发现，传热系数既取决于热通量，也取决于质量通量水平。利用实验结果，提出了一个新的关联式，其中总传热系数被视为由于管顶部的薄膜冷凝和管底部冷凝的强制对流而产生的传热之和。 该相关性可预测+/-7.5%的实验数据。数据的平均绝对偏差为2.7%。关键词:1996年，计算，热流，传热系数，实验，压降，水平，光滑管换热器，换热器，R134a，制冷剂，冷凝，比较引用:研讨会，ASHRAE Trans。1996年，第102卷，第2部分

Quasi-local condensation heat transfer coefficients at low mass fluxes inside smooth horizontal tubes were investigated both experimentally and analytically. Experiments were performed with refrigerant R134a in a smooth, commercially available copper tube with an outer diameter of 0.5in (12.7mm). The operating conditions were selected such that the two-phase flow in the test section corresponded to a stratified-wavy regime. The heat transfer coefficient was found to be dependent on both the heat flux as well as mass flux levels. Utilising the experimental results, a new correlation is proposed whereby the overall heat transfer coefficient is taken as the sum of the heat transfer due to film condensation in the top portion of the tube and the forced convection of the condensate in the bottom portion of the tube. The correlation is found to predict the experimental data within +/-7.5%. The mean absolute deviation for the data is 2.7%.KEYWORDS: year 1996, calculating, heat flow, heat transfer coefficient, experiment, pressure drop, horizontal, smooth tube heat exchangers, heat exchangers, R134a, refrigerants, condensation, comparing