填料蒸发预冷进风的机械通风空冷塔设计及其运行性能  

Design and Operating Performance of Mechanical Draft Dry Cooling Tower Pre-cooled with Wet Medium

作　　者：王明伟 刘天天 高琦 王春伟 沈吉勇 刘守富 何锁盈 WANG Mingwei;LIU Tiantian;GAO Qi;WANG Chunwei;SHEN Jiyong;LIU Shoufu;HE Suoying(Shandong Casen Heat Transfer Technology Co.,Ltd.,Weifang 261055,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东凯翔传热科技有限公司,山东潍坊261055 [2]山东大学能源与动力工程学院,山东济南250061

出　　处：《中国电力》2024年第6期225-234,共10页Electric Power

基　　金：国家自然科学基金面上项目(51776111);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(2023TS1007)。

摘　　要：为了解决机械通风空冷塔夏季机组出力不足,无法满足冷却需求的问题,设计了一种带有填料蒸发预冷进风的机械通风空冷塔,并利用Matlab编写计算程序,仿真研究了填料厚度、环境温度和环境湿度对所设计空冷塔运行性能的影响规律及其节能效果。研究表明:在环境温度为26℃,相对湿度为57%条件下,厚300 mm的CELdek7060填料蒸发预冷进风的预冷效果最好,空冷塔的排热率可提高20.57%;空冷塔的排热性能随环境温度升高而降低,且存在一个临界点温度为13.5℃,只有当环境温度高于此温度,填料蒸发预冷进风才可提升空冷塔的排热性能;在环境温度、相对湿度分别为35℃和57%时,填料蒸发预冷系统可使空冷塔的排热率提高96.96%,使出塔水温进一步降低2.80℃;在环境相对湿度为0%、环境温度为26℃时,填料蒸发预冷系统可使空冷塔的排热率提高81.14%,出塔水温进一步降低6.81℃。单塔每年节能收益约为13.84万元,具有良好的经济效益。In order to solve the problem of insufficient output of mechanical draft dry cooling tower which can’t meet the cooling demand in summer,a mechanical draft dry cooling tower with wet medium pre-cooling inlet air system is designed in this paper.The influence of wet medium thickness,ambient temperature and humidity on the operating performance of the designed dry cooling tower and water-saving performance are carried out by using Matlab program.The results show that 300 mm CELdek7060 medium pre-cooling inlet air system has the best pre-cooling effect and the heat rejection rate of the cooling tower increases by 20.57%at the ambient temperature of 26℃and humidity of 57%;the heat rejection performance of the dry cooling tower decreases with the increases of ambient temperature,and there is a critical temperature of 13.5℃;the wet medium pre-cooling system could improve the heat rejection rate of dry cooling tower by 96.96%,and further reduce the outlet water temperature by 2.80℃at the ambient temperature of 35℃and humidity of 57%;the wet medium pre-cooling system could improve the heat rejection rate of dry cooling tower by 81.14%,and reduce the outlet water temperature by 6.81℃at the ambient temperature of 26℃and humidity of 0%.The total annual energy-saving benefit of a single tower is about 138400 yuan,which has good economic benefits.

关 键 词：空冷塔 蒸发冷却 填料 排热性能 预冷进风 

分 类 号：TB657[一般工业技术—制冷工程]