空气冷却器及其强化传热翅片管型

Air Coolers and Fin Tubes for Heat Transfer Enhancement

对干式、湿式以及干湿联合式空气冷却器的换热特点、常用的翅片管结构、三维翅片等强化传热翅型以及空气冷却器翅片管的加工工艺、选材等方面进行了综述研究。采用套片式加工工艺的条缝型错置带状三维翅片和采用无屑加工方法成形的锯齿翅片,在较低空气流速下具有较高的传热因子和摩擦因子比,是提高空气冷却器空气侧换热的高效翅片管型,为石化行业空气冷却器翅片管的改造提供参考。

The heat transfer characteristics of dry-type, wet-type and combined type air coolers, and the com- monly-used fin-tube structures, the 3D enhanced heat transfer fins and the fin-tube processing as well as the material selection of air coolers were studied, the results show that the slotted 3D fin-tube which boasting of continuous integral technology and the serrated fin-tube which boasting of chipless machining method can en- hance the air-side heat transfer efficiency because of their higher heat transfer factor and friction factor at lower air velocity. This provides the reference for upgrading of air cooler＇ s fin-tube in petrochemical industry.