热力发电2025，Vol.54Issue(12)：56-66,11.DOI:10.19666/j.rlfd.202503060
环境侧风作用下进气喷雾预冷对间接空冷塔散热性能的影响
Effect of air inflow spray pre-cooling on heat dissipation performance of the indirect air cooling tower under environmental crosswind
摘要
Abstract
High-temperature environments can lead to the deterioration of the heat dissipation performance of indirect air cooling towers.Air inflow spray pre-cooling is an effective method to enhance the heat dissipation performance of indirect air cooling towers.Taking a 2×350 MW indirect air cooling unit in northwest China as the research object,a numerical model coupling the spray evaporation with the ventilation and heat dissipation of the indirect air cooling tower is established to study the effect of air inflow spray pre-cooling on the performance of the indirect air cooling tower with different environmental factors.The results show that crosswind can carry the spray downstream,causing the spray to accumulate and benefiting the radiators in the leeward area the most.The performance improvement of the radiators in the windward area decreases with the increasing wind speed,while the radiators in the side area even experience performance degradation at medium to high wind speeds.Additionally,as the wind speed increases,the spray flows out of the annular evaporation zone,resulting in some pre-cooled ambient air failing to enter the radiators and leading to spray waste and reduced effectiveness.The improvement rate of heat dissipation in the indirect air cooling tower after air inflow spray pre-cooling decreases at first and then increases with the increasing wind speed.At an ambient humidity of 40%,the heat dissipation improvement rate decreases from 5.65%at 0 m/s to a minimum of 2.03%at 8 m/s,and then rises to 3.98%at 12 m/s.The effectiveness of air inflow spray pre-cooling weakens with the increasing ambient humidity.Under windless conditions,as the humidity increases from 20%to 80%,the heat dissipation improvement rate of the indirect air cooling tower decreases from 6.4%to 2.4%.关键词
间接空冷塔/喷雾蒸发/散热器/环境因素/数值模拟Key words
indirect air cooling tower/spray evaporation/radiator/environmental factor/numerical simulation引用本文复制引用
LUAN Shaobai,MA Huan,WANG Baigong,SI Fengqi..环境侧风作用下进气喷雾预冷对间接空冷塔散热性能的影响[J].热力发电,2025,54(12):56-66,11.基金项目
国家自然科学基金项目(52206007) （52206007）
国家重点研发计划项目(2022YFB4100700) （2022YFB4100700）
国家资助博士后研究人员计划(GZC20230426)National Natural Science Foundation of China(52206007) （GZC20230426）
National Key Research and Development Program of China(2022YFB4100700) （2022YFB4100700）
Postdoctoral Fellowship Program of CPSF(GZC20230426) （GZC20230426）
