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3(98)20016SHANXIELECTRICPOWERNo13(Ser198)June12001(,037039)::;;;:TK26:B:167120320(2001)03200222041011C50-90ö10ÉN-3000-Ë,CS-400-15-Ë103h-9,,,72kPa,79kPa(89kPag,90kPa),,,,1111,,,10:50MW;123,32;223,31:m=520ö$t,:m;$t;520(2114kJökg2122kJökg)6112,60,112,231514915,8,:2001211224,:2001202219:(19652),,,1988,,213a)950mm,É550mm,330mm,12,,b)14,20,6,c),,d)199412210:50MW,P5=-0.02MPa,C50-90ö1010,P50=01064MPa,Dexo=150töh,Dex=P5DexoöP50Dex=161183töh,F=Pd1LnzZ,d1;L;ZF=311401025711754302=3057179m2ds=DexöF=5219kgöm2h,45kgöm2h55kgöm2h,e),:50MWtW1=31tW2=42P5=01069MPa:Q=(1ö4)Pd2zTrnzZ,Q=mDex=mP5P50=Dexo=520$tDexop5P50,:Q;dz,m;T,mös;©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.nz;Z;P50,MPa;Dexo;m;$tT=450DexoP51000(tW2-tW1)3600d2ZCnZZP50P=452013011010691000(42-31)3600010232100013502010643114=1189mös1189mös,118mös212mösf)16,2131159mm;2159mm42,3194mm511050MW,11,45,159mm194mm45,12,,,45,,45,,01003MPa0103MPa8,0199kPa0132kPa,1(60,82),,3,,12,,,,,:159mm194mm(011MPa014MPa),,214:N-3000-Ë,,9000töh,3000m2,25mm7100mm1mm,5430,:CS-400-15-Ë,:316MPa;:400töh;:20;:15kgöh:10sh-9;:4180m2öh;:3815m,,,21411:,,1011,490,,90,,2141210,0108kPa,1815,,,,,,,::f1=(1ö4)Pd21=4417186mm23220016:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.:f3=1ö4Pd23=17671146mm2,f3öf1=17671146ö44171864:PB=01089+(-0108)=01009MPa,:PW=0134+01089=01429MPa,:$PW=PW-PB=01429-01009=0142MPa,:(PW)max=0133((f3öf1)-1)=0133(4-1)=0199MPa:(f3öf1)$Pt=01877($Pcö$PW)-618,$PC=0104508MPa,:Pc=$PC+PB=0104508+01009=0105408MPa,:(PW)min=(PC-PB)öa+PB,a=2113(f3öf1)-1147=21134-1147=012776,(PW)min=(0105408-010009)ö012776+01009=01171MPa:01171014290199:(PW)minPW(-PW)max,:C1=U20PWC=0195201421000=27153mös:d1=2134c0181(f3f1)01372[TB1-0147(f3f1)1147$PC$PW]014,TB=01310m3ös:GBR3600TWQk106=GBR3600TW(PB-P11B)106=TB,:GB=214687kgöh,:VW=14Pd21C1=43716töh,:N=VW[(PW-P0)103+Hg]360212GC=0112156[(01429-01689)103+2981]36020172=60168kW,:Nsj=3IVcosU=311538001086=65109kW,480töh,43716töh,8195%65109kW60168kW,6177%,,,16146%,:l0=(56)d1=375450mm,:300mm,75mmlK=1115d2=1115(300375)=345mm431125mm,43715,l3=(23)d3=300mm450mm,1800mm,1500mm1350mm3,,,50,,70,46,,,:[1]1[M]1:,198512321[2]1Tb[J]1,1994(4):1111[3]1[M]1:,19931421AnalysingoftheCausesofLowerVaccuminTurbineandItsSolutionLIUJing-hua(DatongNo11ThermalPowerPlant,Datong,Shanxi037039,China)Abstract:Byanalysingandcalculating,itconcludesthatthewater-ejectorofturbineworksatlowefficiencyabstractionpipesandsealingsteamsystemslayoutunreasonablelycondensatewateraccmulatesintheairpipesandthesealingsteamparametersarebadlychosencanformlowvacwmincondenser.Keywords:vaccum;sealingsteamsystem;abstratctionpipes;water-ejector4220013©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.