超临界600MW机组热经济性的定功率分析.pdf

　　 600 MW 1 2 程祖田, 奚振奎 1.河南省电力勘测设计院, 河南 郑州　450007 2.山东商业职业技术学院, 山东 济南　250 103 [　　　]　火电机组的热经济性分析是机组 能运行的依据, 对超临界 600 MW机组建立了热力 系统定功率矩阵方程,并进行了热经济性分析。基于热力系统定功率分析方法, 分析 了加热器端差增大对机组热经济性的影响。分析表明, 第 1级加热器给水端差增大,直 接降低了给水焓值,使得锅炉吸热量增加,所以 1 号加热器给水端差对机组的热经济性 影响最大。 [　　]　超临界;600 MW机组;热经济性;加热器;端差;给水 []　TK123 []　A [ ]　1002 -3364 (2011)04 -0009 -04 [DOI ]　10.3969 /.jissn.1002 -3364.2011.04.009 ANALYSISOFTHERMALEONOMIEFFIIENYFORSUPERRITIAL 600 MWUNITUNDER ONSTANTPOWEROUTPUT 1 2 HENGZutian, XIZhenkui 1.HenanProvincialSurveyDesignInstitute, Zhengzhou450007, HenanProvince, PR 2.Shandong ommercialProfessionalTechnology ollege, Jinan250 103, ShandongProvinc,ePR Abstrac:tAnalysisofthermaleconomicefficiencyofthecoal-firedunitsisthebasisofenergy-savingoperation forunti.sThematrixequationforthermodynamicsystemofsupercritical600 MW unitunderconstantpower outputhasbeenestablished, andthethermaleconomicefficiencybeinganalysed.Basedonthemethodofanaly- sisforthermodynamicsystemunderconstantpoweroutpu,ttheinfluenceofincreasingheater sterminaltem- peraturedifferenceuponthethermaleconomicefficiencyhasbeenanalysed.Analysisshowsthattheincreaseof terminaltemperaturedifferenceforfeed-waterofthefirst-stageheaterdecreasesdirectlytheenthalpyvalueof feed-wate,rmakingtheabsorbedheatofboilertobeincreased, therefor,etheinfluenceofterminaltemperature differenceoffeed-waterthroughheaterno.1 uponthethermaleconomicefficiencyisthemaxmium. Keyword:ssupercritica;l600 MW uni;tthermaleconomicefficienc;yheate;rterminaltempera