The way of heat exchange in the closed wet cooling tower is through the direct contact between the air in the tower and the process water, so as to achieve the purpose of reducing the temperature of the process water. In order to improve the thermal performance of closed wet cooling tower and solve the problem of low heat transfer efficiency, a new elliptical finned tube of cooling tower is proposed, and a mathematical model is established. The process of heat and mass exchange in the tower is studied by numerical method. The effects of wind velocity and spray density on the thermal performance of cooling towers under different structures are analyzed. The results show that the whole velocity field is uniformly distributed, and there is an obvious flow around the cylinder on both sides of the pipe wall, and with the increase of air velocity in the tower, the flow around the cylinder is more obvious, compared with the traditional circular heat exchanger tube, the new elliptical finned tube can significantly improve the thermal performance of the closed wet cooling tower, meet the needs of practical engineering, and reduce the energy consumption of the cooling tower.

封闭式湿式冷却塔内的热交换方式是通过塔内空气与工艺水的直接接触，达到降低工艺水温度的目的。为了提高封闭式湿式冷却塔的热性能，解决传热效率低的问题，提出了一种新型的冷却塔椭圆翅片管，并建立了数学模型。通过数值方法研究了塔内的热质交换过程。分析了风速和喷雾密度对不同结构下冷却塔热性能的影响。结果表明，整个速度场是均匀分布的，在管壁两侧圆柱周围有明显的流动，