侧风下填料非等片距布置对超大冷却塔性能影响的数值模拟  

Numerical Study Regarding Performance Impact for Non-equidistant Fillings in Super-large Cooling Towers Under Crosswind

作　　者：陈瑞 张德英 高明[1] 何锁盈 王明勇[2] CHEN Rui;ZHANG Deying;GAO Ming;HE Suoying;WANG Mingyong(Shandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology&Equipment(School of Energy&Power Engineering,Shandong University),Jinan 250061,Shandong Province,China;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,Shaanxi Province,China)

机构地区：[1]高效节能及储能技术与设备山东省工程实验室(山东大学能源与动力工程学院),山东省济南市250061 [2]西安热工研究院有限公司,陕西省西安市710054

出　　处：《中国电机工程学报》2022年第9期3338-3345,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51776111);山东大学青年学者未来计划(2018WLJH73)。

摘　　要：以某超大型湿式冷却塔为研究对象,建立其三维数值模型并验证。采用20mm和30mm两种不同片距的填料进行填料区内外区布置,揭示不同风速下的相对最佳内区半径R_(1),研究侧风下非等片距填料布置方式对超大型湿式冷却塔热力阻力性能的影响。结果表明:侧风下,非等片距填料能改善超大型湿式冷却塔内空气动力场和温度场的分布。在定风速下,随着内区半径R_(1)的增加,水温降先增大后减小,通风量不断增加。当v=2m/s时,相对最佳的内区半径R_(1)为45m,此时的水温降为11.80℃,与20mm等片距填料布置的水温降11.63℃相比,水温降增加0.17℃,通风量增加了650 kg/s。但随着风速增大,非等片距填料水温降不断减小,通风量和蒸发损失不断减小,非等片距填料优化效果逐渐减弱。Based on the super-large wet cooling tower,a three-dimensional numerical computation model of super-large wet cooling tower was established and validated.The 30 mm fillings are arranged in the inner zone and 20 mm fillings are stalled in the outer zone.The study found out the relatively optimal inner radius R_(1)and researched the influence of non-equidistant fillings on the thermal performance of super large wet cooling tower under crosswind.The result shows that non-equidistant fillings can significantly improve the distribution of aerodynamic field and the temperature field under crosswind.With the increase of inner radius R_(1),water temperature drop rises first and then declines under constant wind speed.When the wind speed is 2m/s,the relatively optimal inner radius R_(1)is 45m,the water temperature drop is 11.80℃,which is 0.17℃higher than the water temperature drop of 11.63℃for 20 mm equidistant fillings,and the ventilation rate increases by 650kg/s.However,with the increase of wind speed,the water temperature drop of non-equidistant fillings gradually decreases,the ventilation rate and evaporation loss also decrease,and the optimization effect of non-equidistant fillings is weakened.

关 键 词：超大型湿式冷却塔 侧风 非等片距填料 性能影响 数值模拟 

分 类 号：TM61[电气工程—电力系统及自动化]