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214JournalOfNortheastChinaVol.21,No.4200112InstituteOfElectricPowerEngineeringDec.,2001:2001210217:,EZF2001:(1976-),,,:100522992(2001)04200012031,2,1,2(1.,1320122.,100085):,:;;;:TK262:A1,hht:=h/ht[13],h(),,,,,(),,,[2],,,,,,,,,,,,,,,,,2,,,,[4],1Dc(h-hc)=DwCp(tw2-tw1)(1)1Q=Dc(hc-hc)=KActm(2)(1),(2)hc=hc+KActmDc(3):Dc;hc;hc;Dw;Cp;tw1;tw2;Q;K;Ac;tm(3),,tw1tw2,Dc,K,t,tw,(3),,[5]tm=twlnt+twt(4)tw=tw2-tw1(5),K[5,6],,Cw,K,K,:K=4070wtzd(6),,=0.800.85;=0.750.80;,=0.650.75;w,:w=1.1Cw4d10.12(1+0.15tw1),Cw,1.52.5m/s;d1;tw1;t,:t=1-0.45(35-tw1)21000z,:z=1+Z-2101-tw135,Zd,dcodcacodcco=(0.9-0.12tw1)dcaco,d=1;dcodcco,d=dcodcco2-dcodcco;,d=1,ri=hht(7):h,221h=hi-hc(8)ht=hi-hi(9),hi;hi,3,300MW,75%50%,,11300MW(kJ/kg)(%)75%()(kJ/kg)(%)50%()(kJ/kg)(%)2354.6882373.790.42395.2852357.187.72382.489.42406.383.52.5-0.38.7-111.1-1.50.1%0.4%0.4%1.2%0.5%1.8%=0.80,d1=0.02m,Cw=2.5m/s,Z=2,d=1,,11.1kJ/kg(50%),1.5%(50%),,,,4,,300MW,,[1].[J].,1992(1).[2].[J].,1996,(2).[3].[M]..1992.[4].[D].,1996.[5].[M]..1987.[6].[M]..1993.OnlineMonitoringoftheEfficiencyofLowPressureCylinderofSteamTurbineLUOZhen1,ZHAOXiao2tong2,XUZhi2ming1,GUODong2xia2(1.NortheastChinaInstituteofElectricPower,Jilin,132012;2.ElectricPowerResearchInstituteofChina,Beijing,100085)Abstract:Fromthepointofengineeringapplication,presentsamethodtocalculatetheefficiencyoflowpressurecylinder,itcanbeapracticalengineeringmeansfortheonlinemonitorthesteamturbineefficiencyandtheanalysisofthermaleconomics,typicalexampledemonstratesthemethodcanbeusedforengineeringapplicationwithpreci2sion.Keywords:Steamturbine;Lowpressurecylinder;Efficiency;Onlinemonitor34: