When entranced steam pressure is 0.103MPa, the corrugated tube's condensation heat transfer coefficient h_i increase of 10%～32% compared with that of bare tube; the spiral fluted tube's condensation heat transfer coefficient h_i increase of 11%～40% compared with that of bare tube; on the condition of high steam pressure, these two enhanced tubes' condensation heat transfer coefficient h_i is lower than that of bare tube, in the range of cooling water flow, when the entranced steam pressure is 0.143MPa, the h_i of spiral fluted tube is about 83%～90% of the bare tube's h_i;when the entranced steam pressure is 0.198MPa the corrugated tube's h_i is about 81%～84% of the bare tube's h_i. The result of the helix spring insert's enhance condensation heat transfer experimental investigation shows: when the entranced steam pressure is 0.143MPa, the h_i of tube within the helix spring insert is about 15%～25% higher than that of bare tube, but the total pressure drop is about 8.1 times of the bare tube.
当管内蒸汽压力较高时，这两种强化管的管内凝结换热系数均低于光管，在实验冷却水流量变化范围内，当入口蒸汽压力为0.143MPa时，螺纹槽管的h_i是光管的83％～90％；当入口蒸汽压力为0.198MPa时，波槽管的h_i是光管的81～84％。
参考来源 - 水蒸汽在竖直管内冷凝换热的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The result shows that heat transfer coefficient of corrugated tube heat exchanger is over 1.5 times than that of bare tube.
结果表明，波纹管换热器的总传热系数比光管高1.5倍以上。
An experimental study of titanium tube fouling characteristics was conducted, which were compared with those of stainless steel tubes and copper bare tubes.
实验研究了钛管的污垢特性，并和不锈钢管、紫铜光管的污垢特性进行了比较。
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