冷却塔提高换热效率的进风方式分析

Air Inlet Mode Analysis of Improving Heat Transfer Efficiency of Cooling Tower

目前电厂冷却塔中心的换热效率较低造成冷却塔性能较差,针对这一问题,以火电厂冷却塔相关理论为基础,分析了外围加装导流板、雨区加装导流管和加装斜面挡风墙等3种可以改变冷却塔进风方式的装置,通过对1000 MW机组冷却塔在不同工况下的出塔温度分析,得出3种进风方式均可使出塔温度降低,进而提高冷却塔换热效率。但每种方式对出塔温度的影响不同,这也为冷却塔的设计和应用提供参考。

At present, because of low heat exchange efficiency, the cooling tower of power plant has poor performance. In order to solve this problem, on the basis of relevant theories, three devices which can change the air intake mode of the cooling tower, i.e. installing the peripheral baffle plates, a guide tube and a slope area respectively are analyzed. Through the analysis of outlet temperature under different conditions in 1000 MW unit, it can be concluded that these three air inlet modes can reduce outlet temperature and then improve the cooling tower heat transfer efficiency. But each mode has different effects on outlet temperature, it may provide the reference for the design and application of cooling tower.