三塔合一间接空冷塔热力性能的数值研究

Numerical Research on the Thermal Performance of the Indirect Air Cooling Tower with Three Incorporate Towers

利用FLUENT数值计算软件建立了散热器塔外垂直布置和塔内水平布置的三塔合一间接空冷塔的数学模型,对不同环境风速进行模拟计算,得到了相应的压力场、温度场和速度场,分析了散热器的布置方式对热力性能的影响。研究结果表明:无风时,散热器的布置方式对热力性能的影响非常小;存在环境风,当风速不超过12 m/s时,两种布置方式的热力性能差异较小;当风速超过12 m/s时,两种布置方式的热力性能差异逐渐变大;散热器塔外垂直布置的空冷塔的热力性能优于散热器塔内水平布置的空冷塔的热力性能。为这种复合塔的优化运行提供参考。

Two numerical models were established for indirect air cooling tower with three incorporate towers with FLUENT software,one with the radiator installed outside the tower vertically and the other with the radiator installed in the tower horizontally. Pressure field,temperature field and velocity field were acquired using numerical calculation in different wind speed conditions. The influence of the installation on the thermal performance was studied in details. The results indicate that when the influence of the installation on the thermal performance can be negligible with no wind.When the wind speed is not more than 12 m/s,the difference of the thermal performance of two kinds of installation is relatively small. When the wind speed exceeds 12 m/s,the difference of the thermal performance of two kinds of installation becomes bigger. The thermal performance of the air cooling tower with the radiator installed vertically outside is better than that of the air cooling tower with the radiator installed horizontally in the tower. The conclusion can provide a reference for the optimal operation of this kind of composite tower.