摘要
以某600 MW间接空冷机组的空冷塔为原型,按1∶30的比例,根据相似原理设计了1套自然环境条件下大型间接空冷塔的实验系统。该系统由模型空冷塔、空冷模型散热器、散热热负荷控制系统及数据采集系统等组成。实验期间可根据数值大小及实验目的利用控制系统调整热负荷。对实验数据计算及分析,表明:该空冷塔实验系统的换热系数测量误差小于20%;利用该实验系统,可获得不同环境气象条件下,空冷塔内部空气流场特性,以及散热负荷的空间分布规律;可进行间接空冷系统热空气回流、冬季防冻及烟塔合一条件下塔内气体流动传热机理的研究。
On the basis of a 600 MW indirect air cooling unit,an experimental system for large-scale air-coo-ing tower was designed by means of the similarity principles,with a proportion of 1 to 30.This system con-sists of modeling air cooling tower,air cooling modeling radiator,heat load power control system and data collection system.During the experiment,the heat load can be regulated by the control system,according to the parameters＆#39;value and experimental purpose.The calculation shows the measurement error of heat transfer coefficient of this experimental system is less than 20%.Through this system,the flow and heat transfer characteristics at inside and outside of the dry-cooling tower under various environmental condi-tions can be measured.Moreover,the correlations of flow and heat transfer of air-cooled heat exchanger and the off-design performance of the indirect dry cooling system can be obtained.The hot plume recirculation flows,anti-freezing in winter and the thermo-hydraulic performances for stack and tower integration design can be investigated using this experimental system.The design principle,basic parameters and measuring errors were analyzed.
出处
《热力发电》
CAS
北大核心
2014年第11期79-82,119,共5页
Thermal Power Generation
基金
国家自然科学基金项目(U1261108)
国家科技支撑计划课题(2011BAA04B02)
中央高校基本科研业务费专项资金资助(JB2012038)
关键词
600MW
间接空冷机组
空冷塔
实验系统
换热系数
测量误差
600MW
indirect air-cooling unit
air cooling tower
experimental system
heat transfer coeffi-cient
measurement error
