摘要
为了解决机械通风空冷塔夏季冷却能力不足的问题,提出了一种干湿联合式机械通风冷却塔,并通过试验研究了3组循环水流量、2组进塔水温及2组风机频率下冷却塔的出塔水温和水蒸发量的变化规律。研究发现,循环水流量越大、进塔水温越低、风机频率越低,则循环水温降也越低。当进塔水温为40 ℃、风机频率为35 Hz时,干湿联合式机械通风冷却塔循环水流量为30,45,60 m^(3)/h时的循环水温降分别为4.74,3.95,3.56 ℃,与机械通风空冷塔相比(循环水温降分别为2.22,1.50,1.05 ℃),水温降进一步降低了2.52,2.45,2.51 ℃;不同循环水流量对应的水蒸发量分别为0.098,0.106,0.142 kg/s。干湿联合式机械通风冷却塔可借助少量水的蒸发,进一步降低空冷塔的出塔水温,有助于提升空冷塔夏季高温时段的冷却能力,研究结果可为空冷塔的节能增效提供理论指导。
To address the issue of inadequate cooling capacity of mechanical ventilation air-cooled towers during the summer season,a kind of mechanical ventilation cooling tower with dry and wet combined ventilation is proposed,and the variation rules of water temperature and evaporation of cooling tower under 3 groups of circulating water flow,2 groups of inlet water temperature and 2 groups of fan frequency are studied experimentally.It has been discovered that a decrease in circulating water temperature is correlated with an increase in circulating water flow rate and a decrease in both inlet water temperature and fan frequency.When the inlet water temperature of the tower is 40℃and the fan frequency is 35 Hz,the circulating water temperature drop of the combined dry and wet mechanical ventilation cooling tower is 4.74,3.95,3.56℃when the circulating water flow rate is 30,45,60 m^(3)/h,respectively.Compared with the mechanically ventilated air cooling tower(the circulating water temperature drop is 2.22,1.50,1.05℃respectively),the water temperature drop is further reduced by 2.52,2.45,2.51℃.The water evaporation of different circulating water flow rates is 0.098,0.106,0.142 kg/s,respectively.It can be seen that the dry and wet combined mechanical ventilation cooling tower can further reduce the water temperature out of the air-cooling tower with the help of a small amount of water evaporation,which helps to improve the cooling capacity of the air-cooling tower in the summer high temperature period,and the research results can provide theoretical guidance for energy saving and efficiency improvement of air cooling tower.
作者
王明伟
张晓楠
孙全全
焦宗昌
孟庆良
张永振
李明
刘天天
何锁盈
WANG Mingwei;ZHANG Xiaonan;SUN Quanquan;JIAO Zongchang;MENG Qingliang;ZHANG Yongzhen;LI Ming;LIU Tiantian;HE Suoying(Shandong Casen Heat Transfer Technology Co.,Ltd.,Weifang 261055,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,China;Shandong Engineering Research Center for High-efficiency Energy Storage and Hydrogen Energy Utilization,Shandong University,Jinan 250061,China)
出处
《流体机械》
北大核心
2025年第2期16-22,73,共8页
Fluid Machinery
基金
山东省科技型中小企业创新能力提升工程项目(2023TSGC0756)
潍坊市科技型中小企业创新能力提升工程项目(2023TS1007)
山东省自然科学基金面上项目(ZR2022ME008)
中国博士后科学基金项目(2023M732102)。
关键词
机械通风空冷塔
填料
填料直接蒸发预冷
出塔水温
水蒸发量
mechanical draft dry cooling tower
wet media
packing direct evaporative pre-cooling
exit temperature of hot water
water evaporation rate
作者简介
王明伟(1984),男,助理工程师,主要从事冷却塔节能节水技术研究,E-mail:wangmingwei@casen-group.com。;通信作者:何锁盈(1987),男,博士,副教授,主要从事传热传质强化与过程节能研究,通信地址:250061山东省济南市历下区经十路17923号山东大学千佛山校区,E-mail:suoyinghe@hotmail.com。
