本文从分析同实验两个方面证明了冷凝过程在垂直面上发生时，壁面温度由上 而下逐渐增加，从而使得在垂直光滑表面上的冷凝传热系数的提高受到一定的限制。 本文提出一些方法来解决，如沟槽表面，多孔表面以及带吸液芯的沟槽表面，并从实 验证明了它们确能提高冷凝传热系数．使壁面温度上下趋于一致。 From the analysis of two aspects of the experiment, it is proved that when the condensation process takes place in the vertical plane, the wall temperature increases gradually from top to bottom, so that the improvement of the condensation heat transfer coefficient on the vertical smooth surface is limited. This article suggests ways to solve such as grooved surfaces, porous surfaces, and grooved surfaces with wicks, and has been experimentally demonstrated that they do improve condensing heat transfer. The wall temperature up and down to the same.