薄壁不锈钢管在淡水冷却凝汽器空冷区的应用

1前言不锈钢作为冷却管材的显著特点是抗汽侧带水滴流的冲击腐蚀、抗氨腐蚀、抗冷却水中硫化氢的腐蚀,因此在换热器中得到广泛应用。由于常规不锈管管壁较厚,导热性能较差,导致凝汽器传热系数下降影响换热效率,以往不锈钢管很少用于凝汽器中。随着技术发展,生产出薄壁不锈钢管,

The Use of Thin-wall Stainless Steel Tubes in the Air-cooled Zone of a Fresh Water-cooled Steam Condenser

The use of brass tubes for the air-cooled zone of a power plant steam condenser can lead to serious corrosion by ammonia,while the application of copper-nickel alloy tubes or titanium ones is associated with expensive costs.Stainless steel tubes feature good corrosion-resistant performance against ammonia.The authors have performed a contrasting analysis regarding the heat transfer performance, vibration properties,tube expanding characteristics and cost-effectiveness of thin-wall stainless steels.On this basis it is concluded that stainless tube materials when used for the air-cooled zone of a fresh-water cooled condenser have the merits of a fair operation performance and low cost,resulting in a high potential for their wide applications.