摘要
为探明不同导流方式对高位收水冷却塔热力性能的影响,建立了含内部导流装置、外部导流装置及内外耦合导流装置的高位收水冷却塔热力性能三维数值计算模型,选取不同的环境侧风条件,通过数值计算分析了各种导流方式作用下塔内空气流场及循环水温度场的分布规律,并对比了不同导流效果随环境侧风的变化趋势。结果表明:在侧风作用下,内部导流和外部导流均会减弱局部高风速区范围,同时外部导流还可以降低内部涡流影响,而内外耦合导流则可以进一步均匀流场,使整体换热性能提高至最佳状态;0°和45°风向下,随着环境风速的增加,各种导流方式下高位收水冷却塔通风量及出塔水温的变化趋势一致,其中0°风向时耦合导流的效果更强,与原塔相比,耦合导流最大使通风量提高58.3%,出塔水温降低3.06℃。
To investigate the effects of different flow diversion configurations on the thermal performance of high-level water collecting cooling towers,a three-dimensional numerical model for thermal performance analysis was developed,incorporating internal,external,and coupled flow diversion configurations.The distribution patterns of air flow fields and circulating water temperature fields in tower under various flow diversion configurations were analyzed by numerical calculation,with comparative studies conducted on the variation trends of different flow diversion configurations under various environmental crosswind conditions.Results reveal that under the action of crosswind,both internal and external flow diversion configurations effectively reduce the local high crosswind velocity zone range,while the external configuration additionally mitigates adverse effect of internal vortices.The coupled flow diversion configuration further homogenizes the flow field,enhancing the overall heat exchange performance to optimal levels.In 0°and 45℃ crosswind directions,all flow diversion configurations demonstrate consistent trends in ventilation rate and outlet water temperature variation of high-level water collecting cooling towers with increasing environmental crosswind velocity.Notably,compared with that of original tower,the coupled configuration in 0℃ crosswind direction demonstrates enhanced effectiveness,achieving the maximum ventilation enhancement of 58.3%and outlet water temperature reduction of 3.06℃.
作者
宫现辉
郭富民
陈学宏
孙奉仲
GONG Xianhui;GUO Fumin;CHEN Xuehong;SUN Fengzhong(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan,China,Post Code:250013;School of Energy Power and Electrical Engineering,Ludong University,Yantai,China,Post Code:264025;School of Nuclear Science,Energy and Power Engineering,Shandong University,Jinan,China,Post Code:250061)
出处
《热能动力工程》
北大核心
2025年第10期123-130,共8页
Journal of Engineering for Thermal Energy and Power
基金
山东省自然科学基金资助项目(ZR2022QE288)。
关键词
高位塔
导流方式
通风性能
传热传质
数值计算
high-level water collecting cooling tower
flow diversion configuration
ventilation performance
heat and mass transfer
numerical calculation
