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:2005-03-30;:2005-06-11:(1966-),,,.:1001-2060(2005)06-0636-031,2,1(1.,150001;2.,164300):,;,,;,,,:;;;:TK47:ADPkgs-1iPkJkg-1DbhPkgs-1ibhPkJkg-1DgrPkgs-1igrPkJkg-1tgrPVyPm3s-1IPkJkg-1IPkJkg-1HPm2QrpPkWQgzPkW1,,,,[1],,,,,22.111,:Di=Dbhibh+Dgrigr:D=Dbh+Dgr(1):D(i-ibh)=Dgr(igr-ibh)(2)(2),;igr=i,Dgr=D,Dbh=0,igri,DgrD,Dbh0,,igr206200511JOURNALOFENGINEERINGFORTHERMALENERGYANDPOWERVol.20,No.6Nov.,2005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=Qgz,:Vy(I-I)=Dgr(igr-ibh)(3)(2)(3),:Qrp=Qgz=Vy(I-I)=Dgr(igr-ibh)=D(i-ibh)=const(4)(4):I=I-D(i-ibh)Vy:I=I-QgzVy=I-QrpVy(5)(5),(4):Dgr=Vy(I-I)igr-ibh=D(i-ibh)igr-ibh:Dgr=Qrpigr-ibh=Qgzigr-ibh(6)tgr,igr,(6)Dgr,[1]tK,Qcr=KtH,Qrp-QcrQrp100%2%;,tgr,,3PG6551B1(15)2(-14)3(21.8)4(41),;;,441511234tP15-1421.841VyPm3s-1113.9127.3111.1101.2P537517542557tgsP104104104104Pk1PMPa4.514.664.514.271-xP%0.50.50.50.5PPMPa4.124.274.123.97tP506.5+3.50492+18-5506.5+3.50506.5+3.50DPkgs-118.337219.2218.241117.653621234CO20.04360.04460.04330.0418N20.74340.74780.74130.7245O20.13030.13000.13020.1280H2O0.08270.07770.08520.10573PPkJm-31234400548.8548.6549.0550.6500693.9693.6694.1696.2600841.6841.3841.9844.57366,:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)(),,,(2),,(),,,,51234tP115-1421.841P1537517542557IPkJm-33748.5718.7756.2780.7iPkJkg-1Pt[1]XXV3457.53422.33457.53458.7ibhPkJkg-1Pk11-x[1]XX2787.62786.32787.62788.8DPkgs-1118.337219.2218.241117.6536QrpPkW(4)12284.112223.912219.711826.10.9850.9850.9850.985VyPm3s-11113.9127.3111.1101.2IPkJm-3(5)639621.2644.5662.1P3462.2450.1465.8476.6tgrP513.8493.7519535.5igrPkJkg-1Ptgr[1]XXV3474.23426.53486.33525.7P(m2K)W-1(103)1.1631.1631.1631.163tP[1]81.377.682.083.9DgrPkgs-1(6)17.891219.093917.489216.0484KPkW(m2K)-1[1]0.03120.03250.03080.0292HPm244850.444850.444850.444850.44QcrPkWKtH12303.412232.812250.311883.0eP%Qrp-QcrQrp1000.1620.0720.2520.482QgrPkWQrp12284.112223.912219.711826.1DbhPkgs-1(1)0.4460.12610.75191.6052:[1](),.(1973)M.,.:,1976.8362005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=TheCost2effectivenessofSeveralEngineeringProjectsFeaturingNaturalGas2firedCombinedCyclePowerPlants[,]PZHAOZhen,CHENRui2juan(ChinaUnitedEngineeringCo.undertheSecondDesignResearchAcademyofMachine2buildingMinistry,Hangzhou,China,PostCode:310022)PPJournalofEngineeringforThermalEnergy&Power,-2005,20(6).-632635Throughthetech2economicanalysisofseveralspecificprojects,includingtheirconstructionscaleandestimatedcapitalin2vestmentitisexpoundedthatnaturalgas2firedcombinedcyclepowerplantsrequirearelativelysmallcapitalinvestmentandinvolveashorterconstructionperiod.However,therelativelyhighpriceofnaturalgashasledtoahigherpowergener2ationcostandanexcessivelylowprofitability,showingthatpropersupportfromgovernmentauthoritiesisstillnecessaryforthedevelopmentofnaturalgas2basedpowergeneration.Furthermore,fromtheviewpointofnaturalgasresourcesandrele2vantequipmentrequirements,etcdiscussedarethefeasibilityofnaturalgaspowerplantconstructionandsomeexistingproblems.Theissuesrelatingtonatural2gassupplyassuranceandsafetyoperationarealsomentionedwithappropriatemeasuresforsolvingthembeingproposed.Keywords:naturalgas2firedpowergeneration,combinedcyclepowerplant,investmentandeconomicanalysis=SuperheaterThermodynamicCalculationFeaturesintheCaseofSaturatedSteamAttemperationinaGas2turbineWasteHeatBoiler[,]PZHENGXin2wei,WANGJi2rui(InstituteofPowerandNuclearEnergyEngineeringundertheHarbinEngineeringUniversity,Harbin,Chi2na,PostCode:150001),SONGYan(HeiheCityTechnicalQualitySupervisionBureau,Heihe,China,PostCode:164300)PPJournalofEngineeringforThermalEnergy&Power,-2005,20(6).-636638Onthebasisofbuildingadesuperheatingmodeltheattemperationperformancefeaturesareanalyzedalongwithanassess2mentoftheirimpactonthesuperheaterthermodynamicperformanceandthelayoutofitsheatingsurfaces.Alongsidewiththedescriptionofthethermodynamiccalculationmethodofthesuperheaterunderthismodelaformulahasbeenderivedforcalculatingthemajorthermodynamicdata,whichareputtouseinaplannedengineeringproject.Inconjunctionwiththeanalysisofthecalculationresultsforanengineeringexampletheroleplayedbythemethodunderdiscussionisex2pounded,pointingoutthatduringtheassignmentofcalculationoperatingconditionsforthegas2turbinewasteheatboilerthefeaturesofthevariationoflocalatmosphericparametersshouldbetakenintoaccount.Thisisessentialtoensuringthecomprehensivenessoftheoperatingconditionsbeingcalculated.Keywords:gas2turbinewasteheatboiler,attemperationofsaturatedsteam,superheaterthermodynamiccalculation,specificfeatures600MW=AnAnalysisoftheParametersofStable2pressureSteamPurgingfora600MWSupercriticalBoileratZhenJiangPowerPlant[,]PCHENZhi2bing,ZHANGHai2chao,HUAMao2lai(JiangsuProvi