热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
11期
79-82,119
,共5页
席新铭%郭永红%杜小泽%杨立军%杨勇平
席新銘%郭永紅%杜小澤%楊立軍%楊勇平
석신명%곽영홍%두소택%양립군%양용평
600 MW%间接空冷机组%空冷塔%实验系统%换热系数%测量误差
600 MW%間接空冷機組%空冷塔%實驗繫統%換熱繫數%測量誤差
600 MW%간접공랭궤조%공랭탑%실험계통%환열계수%측량오차
600 MW%indirect air-cooling unit%air cooling tower%experimental system%heat transfer coeffi-cient%measurement error
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。
以某600 MW間接空冷機組的空冷塔為原型,按1∶30的比例,根據相似原理設計瞭1套自然環境條件下大型間接空冷塔的實驗繫統。該繫統由模型空冷塔、空冷模型散熱器、散熱熱負荷控製繫統及數據採集繫統等組成。實驗期間可根據數值大小及實驗目的利用控製繫統調整熱負荷。對實驗數據計算及分析,錶明:該空冷塔實驗繫統的換熱繫數測量誤差小于20%;利用該實驗繫統,可穫得不同環境氣象條件下,空冷塔內部空氣流場特性,以及散熱負荷的空間分佈規律;可進行間接空冷繫統熱空氣迴流、鼕季防凍及煙塔閤一條件下塔內氣體流動傳熱機理的研究。
이모600 MW간접공랭궤조적공랭탑위원형,안1∶30적비례,근거상사원리설계료1투자연배경조건하대형간접공랭탑적실험계통。해계통유모형공랭탑、공랭모형산열기、산열열부하공제계통급수거채집계통등조성。실험기간가근거수치대소급실험목적이용공제계통조정열부하。대실험수거계산급분석,표명:해공랭탑실험계통적환열계수측량오차소우20%;이용해실험계통,가획득불동배경기상조건하,공랭탑내부공기류장특성,이급산열부하적공간분포규률;가진행간접공랭계통열공기회류、동계방동급연탑합일조건하탑내기체류동전열궤리적연구。
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'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.