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19119992POWERENGINEERINGVol.19No.1Feb.199923300MWW()()300MWW,,,,621:W1998205229,19982092220W,90,W,1996300MWW,W,,,,300MWW,,W1300Möh,123.8töh24.765m,13.344m,11.4m;7.239m,14.39m,3113m2,1119C,120.8kWöm3,2475kWöm3,4563kWöm2,,,30%1300MWW1-2-3-©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1(%)(%)(%)(%)(%)(%)(%)(%)(%)(kJökg)64.52.252.01.011.659.425.441.523.15237502(%)A(%)B(%)D(%)E(%)F(%)20259.4109.41067.21313.843639(1),,24,,,6(ABCDEF),AB,;C;DEF,,D,F,E,NOx(2)222W,,,,,,[1],,,,;,,,,,,;,,,W,,,,,,,20%,40%,82%,91%,421gökWh3,,418,,,3.14219©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3300MW,AB4%17%AB,9m,31-A,60%;B,80%2-A,30%;B,60%,AB,AB,,,,,,,,AB,,3.2DEF,DE,,,NOx4300MWD25m,D,,25m,D,,E,NOx4D1-D,25%2-D,10%F48%,,F;,,5,F35%,,,1.8%5.2%,30%10%,F,,,,,,,5F1-F2-F3.3,,521©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,W,,,,,F,,,6250MW290MW,,20m,20m,,,,1W,300MW,61-250MW2-290MW,W,,,ABF,,,,,,,,,AB,,,,AB,,(9m)1000C,,AB;1050C1100C,AB,,1000Pa,4,ABW;DE;F,AB,W,,,,,[1]..,1997(9),,195512,19927,,230,16219©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.ing,1999,19(1):1722Inourcountryallutilityunitswiththecapacitylargerthan125MWareequippedwithreheatboil2ersexclusively.Theimportantmeansforenhancingtheiroperationeconomyaresolvingtheproblemofreheatsteamtemperatureadjustment(RSTA)andcontrol.Inthispaperthedevelopmentofreheatsteamtemperatureadjustingdevicesusedindomesticutilityboilersisrecalledfirstly,thenthelinkageofsteamtemperatureandtheexhaustingconditionofsteamturbineaswellastheinfluenceonpendanttubesafetyduringadjustmentarediscussed.Thesituation,whichshowingquitehigheremergencywa2tersprayinreheatsysteminmanylargeutilityboilersisunacceptable,shouldbecorrectedeffectively.Thetestona300MWcontrolledcirculationboilerforRSTAbytitableburnersismoredetailedmen2tioned,meanwhilethephenomenacalledtemperatureabnormalvariationandit’sreasonareanalyzedbasically.SomerequirementsonautomaticcontrolcircuitconfigurationforRSTAarealsoreviewed.Figs4,tables7andrefs5.YanWei-ping(Baoding,NorthChinaUniversityofElectricPower),GaoZheng-yang,JiangPing.CombustionExperimentsofthe300MWWTypeFlameBoiler.PowerEngineering,1999,19(1):2326Withtheobjectiveofsolvingtheproblemsofsuperheateroverheating,highcarboncarryoverandfurnaceslaggingofthe300MWWtypeflameboilerssinceitwasputintooperation,thecombustionexperimentswerecarriedout,emphasizedonthesecondaryairregulatingbehaviors.Theflametemper2aturedistributiopnsweremeasuredunderthedifferentoperatingconditions.Theeffectsofdifferentcombinationofsecondary2airflowratesoncombustionperformanceareanalyzed.Theinfluenceofboil2erloadvariationisalsodiscussed.Figs6,tables2andref1.LuoYong-hao(Shanghai,ShanghaiJiaotongUniversity),WangMeng-hao.StudyoftheOptimumDe-signofConstructionforReheaterofLargeCapacityUtilityBoiler.PowerEngineering,1999,19(1):2729Theoverheatingtubeburstaccidentsoccurredwidelyinreheatersoflargecapacityutilityboilers.Oneofthemainreasonscausingfaultdesignistheerrorcalculationmethodsfordeterminingtheflowdeviationofsteam.Animprovingcalculationmethodisproposedinthispaper.Theoptimumdesignsofconstructionsaresuggestedfortwotypicalrealexamplesbyusingthenewmethod.Figs5andrefs5.LiuJian-xin(Tianjin,TianjinUniversity),JinHai-bo.ExperimentalStudyofBoilingHeatTransferonPorousTube.PowerEngineering,1999,19(1):3033Theheattransferperformanceoftheporoustubesinteredmetalliccoatinghasbeentested.Theresultsshowedthattheporoustubecouldenhancetheboilingheattransfer.Comparedwiththatofsmoothtube,itsboilingheattransfercoefficientsontheporoussurfaceincreased56times.Figs8andrefs6.GuanLi-jun(Jiamosi,CollegeofTechnology,JiamosiUniversity),TianDe-yun.ExergyAnalysisAp-pliedtoHeatExchangers.PowerEngineering,1999,19(1):3436Heatbalancingmethodsaregenerallyusedindesignandanalysisofheatexchangers.Thispapermakesuseofexergyefficiencytoanalysethethermalperformanceofheatexchangersand,basedonthismethod,providesrelationshipsbetweenexergyefficiencyheatexchangersanditsheatload,itsheatexchangingtubediametersaswellasitsvelocityoftheheatandcoldmedia.Figs5andrefs8.ChenHai-ping(Baoding,North-ChinaUniversityofPowerEngineering),ZhangShu-fang,ZhangChun-fa,ZhouJian.TheThermalUnitMatrixMethodontheThermodynamicSystemofaPowerPlant.PowerEngineering,1999,19(1):3740,16Theheateconomyanalysisofthethermodynamicsystemisanimportanttechnicalmensofener28719©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.