将正交试验设计法引入水平螺纹肋片管外强化换热实验研究中，用正交设计法安排实验，用方差分析法分析实验结果，给出肋片间隙，肋片厚度及肋顶半角对冷凝换热效果的影响程度 The orthogonal experimental design method was introduced into the experimental study of enhanced heat transfer outside the horizontal screwed fin tube. The experiment was arranged by orthogonal design method, and the experimental results were analyzed by analysis of variance. The fin gap, the fin thickness and the half- The effect of condensation heat transfer effect