25mw凝汽式汽轮机组热力设计.doc

毕业设计说明书25MW凝汽式汽轮机组热力设计中北大学(朔州校区)陈淑婧1227024207学生姓名:学号:学院:热能与动力工程专业:张志香指导教师:2016年6月30MW凝汽式汽轮机组热力设计摘要本课题针对30MW凝汽式汽轮机组进行热力设计,在额定功率下确定汽轮机型式及参数,使其运行时具有较高得经济性,并考虑汽轮机得结构、系统、布置等方面得因素,以达到“节能降耗,保护环境”得目得。本文首先对汽轮机进行了选型,对汽轮机总进汽量进行了计算、通流部分得选型、压力级比焓降分配及级数得确定、汽轮机级得热力计算、漏气量得计算与整机校核等。根据通流部分选型,确定排汽口数与末级叶片、配汽方式与调节级得选型,并进行各级比焓降分配与级数得确定;对各级进行热力计算,求出各级通流部分得几何尺寸,相对内效率,实际热力过程曲线。根据热力计算结果,修正各回热抽汽点压力达到符合实际热力过程曲线得要求,并修正回热系统得热力平衡计算,分析并确定汽轮机热力设计得基本参数。关键词:汽轮机,凝汽式,热力系统,热力计算Thermodynamicdesignof30MWcondensingsteamturbineAbstractThistopicfor30MWsteamturbineunitforthermaldesign,seekappropriateturbineatratedpower,tomakeitrunwithhighereconomicandtoconsideredtosteamturbinestructure,systemandarrangementandparts、Soitcanachieve"energysaving,environmentalprotection"purpose、Determinationofmachine,firstly,thesteamturbinefortheselectionoftheturbinetotalinletwerecalculatedthroughflowpartoftheselectionpressureenthalpydropdistributionandseries,steamturbinethermodynamiccalculation,theleakageamountofcalculationandcheck、Accordingtothethroughflowpartofselectiontodeterminetheexhaustportnumberandthelaststagebladesofsteamdistributionmodeandregulationlevelselection,andfordifferentlevelsofspecificenthalpydropdistributionandtheseriesoflevelswithathermodynamiccalculationforatalllevelsthroughflowpartofthegeometryandrelativeinternalefficiency,theactualthermodynamicprocesscurve、Accordingtothethermodynamiccalculationresults,correctionofregenerativeextractionsteampressuretoconformtotheactualthermodynamicprocesscurve,andrepairThermodynamicequilibriumcalculation,analysisanddeterminationofthebasicparametersofthethermaldesignoftheturbine、keywords:steamturbine,condensingtype,thermodynamicsystem,