直接空冷凝汽器换热性能影响因素研究  

Study on Influencing Factors of Heat Transfer Performance of Direct Air-Cooled Condenser

作　　者：刘晓玲[1] 张力[1] 王智[2] LIU Xiao-ling;ZHANG Li;WANG Zhi(Shandong Electric Power Engineering Consulting Institute Corp.,Ltd.,Shandong Jinan250013,China;Key Lab of Cond-ition Monitoring and Control for Power Plant Equipment,North China Electric Power University,Ministry of Education,Hebei Baoding071003,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013 [2]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《机械设计与制造》2021年第3期48-52,56,共6页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51306059)。

摘　　要：以内蒙古某电厂为研究对象,采用理论计算和数值模拟相结合的方法,研究了环境温度、风速、湿度及风机转速对直接空冷凝汽器换热特性的影响。研究表明:来流风速为(13~15)m/s时,总换热量较设计工况降低了(3.2~7.5)%;环境温度对总换热量影响很大,但当环境温度大于15℃时,总换热量下降趋势逐渐变的缓慢;环境湿度对总换热量的影响较小;随着环境风速的增加,各空冷单元风机进口流量整体呈下降趋势,其中迎风侧的第一个风机进口流量降幅最大。Taking a power plant in Inner Mongolia as the research object,the effects of environmental temperature,wind speed,humidity and fan speed on the heat transfer characteristics of direct air-cooled condenser were studied by combining theoretical calculation with numerical simulation.The results show that the total heat transfer decreases by(3.2~7.5)%compared with the design condition when the inflow wind speed is(13~15)m/s.Environmental temperature has a great influence on the total he-at transfer,but when the ambient temperature is higher than 15℃,the total heat transfer decreases slowly.The influence of ambient humidity on total heat transfer is small.With the increase of ambient wind speed,the inlet flow rate of each air-cooled unit fan decreases as a whole,and the first fan on the windward side decreases the most.

关 键 词：来流风速 环境温度 凝汽器 直接空冷 换热特性 

分 类 号：TH16[机械工程—机械制造及自动化] TK26[动力工程及工程热物理—动力机械及工程]