逆流湿式冷却塔宏观预测耦合模型及其热力性能研究  

Prediction Conjugative Model for a Counterflow Wet Cooling Tower and its Thermodynamic Performance Analysis

作　　者：余建航 屈治国[1] 李澎[2] 管坚[2] YU Jian-hang;QU Zhi-guo;LI Peng;GUAN Jian(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi'an,710049,China;Energy Saving Technology Center,China Special Equipment Inspection and Research Institute,Beijing,100029,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]中国特种设备检测研究院节能技术中心,北京100029

出　　处：《热能动力工程》2020年第6期183-190,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点研发计划(2017YFF0209803)。

摘　　要：提出了一种同时考虑喷淋区与填料区的湿式冷却塔性能预测模型,通过对喷淋区和填料区分别建立数学模型,将两个区域耦合求解,从而计算出最终的出口参数,分析在不同入口空气相对湿度下液滴初始直径和液滴初始速度对冷却塔换热能力的影响。结果表明,耦合模型的结果相比于忽略喷淋区和雨区的模型更接近实验结果,预测误差最大可减少1.51%;降低入口空气相对湿度、减少液滴初始直径可以强化换热,冷却水出口温度降低,而初始液滴速度对冷却水出口温度的影响则可忽略不计。In this study,a complete model is proposed to predict the performance of the wet cooling tower.Contrary to the previous study,we present mathematical models for the spray zone and the packing zone,separately,and then couple them to calculate the final outlet parameters.The different operation parameters,such as the initial diameter and velocity of the droplet,are studied at different inlet relative humidity,to obtain the influence on heat transfer capacity of cooling tower.The results from the coupled models are observed to be closer to the experiment results than those with the spray and rain zones being neglected,and the prediction error can be reduced by1.51%at the maximum.Reducing the relative humidity of the inlet air and the initial diameter of the droplet can enhance heat transfer and reduce the outlet temperature of the cooling water.The velocity of initial droplet has little influence on the cooling water outlet temperature.

关 键 词：湿式冷却塔 宏观性能预测 蒸发 传热 传质 

分 类 号：TQ021.3[化学工程]