提高大型汽轮机综合运行经济性的途径

384200912THERMALTURBINEVol.38No.4Dec.2009(,200240):,;,:;;;;;;:TK261:A:1672-5549(2009)04-0213-04ImprovingOperationPerformanceofLargeSteamTurbinesZHANGXiao2xia(ShanghaiElectricPowerGenerationEquipmentCo.Ltd.ShanghaiTurbinePlant,Shanghai200240,China)Abstract:Optimizingtheoperationmodeofsteamturbineshotterminal(inletpart)andcoldterminal(exhaustpart)canremarkablyimproveunitscomprehensiveoperationaleconomy.Thefactorsthataffecttheturbineefficiencyinallloadrangesareanalyzeddeeplyinthispaper.Intheanalysisofhotterminal,themethodofadoptingsequencevalvemodeduringhigherloadandslidingpressuremodewiththeleastvalveadmissionduringlowerloadisthebestchoicefortheturbineperformance.Intheanalysisofcoldterminal,themodeofregulatingthebackpressureaccordingtotheloadissuggested.Itisbeneficialtotheperformanceofefficiency.Keywords:turbine;hotterminal;coldterminal;economy;sequencevalve;singlevalve;slidingpressure:2009-06-12:(1971-),,,,0,70%,,,,,,,,,,,11.1,3:,,,,,,,,,4,,,,,1.23,1(),,,,1300MW()2,,(),,2300MW1.3:(1),,,,(2),0.5,,,,,,,,,,75%,0.3,,,0.30.40.5,,41241.4:,,,,,,,1,50%,62%51%,,,1300MWMPa(a)kWMPa(a)kWMPa(a)kWMPa(a)kW30%16.7296116.730176.73414265.5130250%16.7366616.7373810.4224508.5213975%16.7464716.7478515.38431012.6236611.5(),,,,,80%,,60%,,,,80%80%,,,,,,,;,110%;,100%;80%,,,,:;3300MW3300MW2,1%3%,,2.1,,,,:(1),,,(2),,,,4600MW,100%5122,,50%,42.5kJ/kg,5630kW,11kJ/kg1450kW,7080kW,2.4%42kPa106m3/hkJ/kg100%4.96.2521.350%4.93.6028.250%3.534.8517.2+42.5kJ/kg3,100%2.2,,Mca,,0.850.9,:Mca=C2a/a:C2a;a,380m/sC2a=GV/FGV;F,,600MW,F7.52m2,100%3.5kPa,C2a326m/s,,,,3,,:(1),80%,50%,300MW:50%1.4%3.19%(2),,,,50%2.4%,;,,,,,:[1].[J].,2009,38(1):1-4.[2].[M].,1988.[3]300MW[Z].,2009.612