填料非均匀布置耦合分区配水对湿式冷却塔热力性能的影响  

Effect of Non-uniform Layout of Packing Coupled with Partition Water Distribution on Thermal Performance of Wet Cooling Tower

作　　者：步兆彬 孙更生 江广旭 吕赛 杨继冲 何锁盈 高明[2] BU Zhaobin;SUN Gengsheng;JIANG Guangxu;LÜSai;YANG Jichong;HE Suoying;GAO Ming(Zhaolou Power Plant,Shandong Huaju Energy Co.,Ltd.,Heze 274700,Shandong Province,China;Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology&Equipment,School of Energy and Power Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东华聚能源股份有限公司赵楼综合利用电厂,山东菏泽274700 [2]山东大学能源与动力工程学院,高效节能及储能技术与装备山东省工程实验室,济南250061

出　　处：《动力工程学报》2023年第11期1413-1420,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51776111);山东省重点研发计划资助项目(2019GSF109084)。

摘　　要：以某300 MW火力发电机组的大型湿式冷却塔为研究对象,建立填料非均匀布置耦合分区配水的三维数值模型。填料内外区分别布置30 mm和26 mm S波填料,改变配水分区半径R_(1),重新分配配水内外区配水占比,研究不同工况下填料非均匀布置耦合分区配水对冷却塔热力性能的影响。结果表明:填料非均匀布置耦合分区配水可显著降低塔心区的高温,提高气水比。设计工况下,随着填料分区半径R_(2)和内区配水占比P的增大,冷却数和体积传热系数均先增大后减小。当R_(1)=15~35 m时降低P,而当R_(1)=40 m时增大P,均可提高湿式冷却塔整体热力性能。此时相对最佳的耦合布置方案为R_(1)=25 m、R_(2)=25 m和P=35%,与原始塔相比,冷却数和体积传热系数分别增大0.09和17.0 W/(m^(3)·K)。Taking the large wet cooling tower of a 300 MW unit as the research object,its three-dimensional numerical model of non-uniform layout of packing coupled with partition water distribution was established.When its inner and outer packing zones were arranged with 30 mm and 26 mm S-wave packing,respectively,the effect of non-uniform layout of packing coupled with partition water distribution on the thermal performance of cooling tower was studied under different operating conditions via changing the partition water distribution radius R_(1)and rearranging the water distribution percentage between the inner and outer zones.Results show that non-uniform layout of packing coupled with partition water distribution can significantly reduce the high-temperature zone in the tower center and increase the air-water ratio.Under the design condition,with the increase of packing partition radius R_(2)and water distribution percentage in the inner zone P,the Merkel number and volume heat transfer coefficient increase firstly and decrease subsequently.The overall thermal performance can be improved by reducing P at R_(1)=15~35 m or increasing P at R_(1)=40 m.The relatively optimal coupling layout can be achieved at R_(1)=25 m,R_(2)=25 m,and P=35%.Compared with the original tower,the Merkel number and volume heat transfer coefficient increase by 0.09 and 17.0 W/(m^(3)·K),respectively.

关 键 词：湿式冷却塔 填料非均匀布置 分区配水 热力性能 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]