300MW火力发电机组热经济性在线分析

重庆大学硕士学位论文300MW火力发电机组热经济性在线分析姓名：周留坤申请学位级别：硕士专业：热能工程指导教师：唐胜利20060501IVisualBasic6.0AccessIIABSTRACTReal-timeeconomicanalysisforpowerplantunithassignificanceoneconomicoperationandenergysavingofpowerplant.Withthedevelopmentofcomputertechnology,usingcomputerssupplyreliableguaranteetorealizecomprehensivemonitorandmanagementofthepowerplantunitforwhichsafetyandeconomicoperation.Basedontheprimarydata,thispaperhasstudiedanddevelopedthesecondaryonlinecomputingmodel,whichcanreflecttheoperatingefficientperformance.Themaincontentsareasfollows:Basedonanalyzingseveralkindsofcomputingmodelsoftheboilerefficiencyperformancetestcodeforutilityboilerisselectedasoriginalversionandanewboilerefficiencyonlinecomputingmodelispresented,whichonlyneedinginputthecoalindustrialanalyticalcomponentsandthemainoperatingmonitoredparametersoftheboilercanonlinecomputetheboilerefficiencies.Heatdeviationanalyticalmethodisadopted,whichisusedtoanalyzetheinfluenceswhichthemainoperationalmonitoredparametershaveontheeconomicperformanceofthepowerplantunit.Theeconomicperformanceoftheboilerison-linediagnosedandanalyzedbythemonitoringoperatingparametersoftheboiler.Onthebaseoftheoriginalcyclicalfunctionmethod,ageneralheatermodelispresentedandcyclicalfunctionmethodisimprovedconsideringactualoperatingcharacteristicsofthermodynamicsystem.Themethodmakescalculationsimplerandmoresuitableforrequirementofreal-timecalculation.Acomprehensivemathematicalmodelofreal-timethermaleconomicalanalysisforthermodynamicsystemissetupinthisthesis,anditcanbeusedtoprovideadvicetoeconomicoperationofthepowerplantunits.Underconsiderationofoff-designperformance,Themethodofreferenceindexofoperatingparametersforthermodynamicsystemisintroduced.Theimprovedcyclicalfunctionmethodisanalyzedquantitativelythroughusingthetheoryoftheequivalententhalpydropandthereal-timethermalconsumptionanalysiscandone.Themethodofthecyclicalfunctionisperfectedinthecomputinganalysisofthepowerplantunitlocally.Themathematicalmodeliscreatedbyanalyzingthecondenser.TheparametersIIIofthecondenservacuum,condenserdeanfactor,rationalrecycledwatertemperaturerise,rationalterminaldifferenceoftheheattransferandcondenserbackpressureareonlinemonitored.VisualandentirelygraphicalinterfacessoftwarewasrealizedusingVisualBasic6.0andAccessDatabase.Keywordspowerplantunitcyclefunctionmethodequivalententhalpydropmethod,thermaleconomicalperformance,onlinecomputing1111.1[1][2][3]90DCSDASEPRI123500KJ/KW·h1500KJ/KW·h[4]1998404g/(KW·h)80g/(KW·h)[5]1.213AIDEPRIBabcockControlsDVGVGBCRIEPIMitsubisiHitachiBBCMorgantownEPRIPotomacGE/Honeywell40208401400ASMEPTC[6]DCSDCSABBAOPTIMAXSiemensSR4ElsagBaileyPERFORMEREPRIOEM[7]DCSDCSEPRI2000DCSABBOptimaxSiemensPROFINUCPLMCOTMCSFOXBOROElsagBailey14[8]MDG[9]1.31[10]2[11][12][13]315[14][15][16]4[17]1.4123161.1DCS()1.1Fig.1.1Structureofsoftwareanalysis2722.11GB10184882ASMEPTC4.131231%100(%)×=2%1001%×−=2.1.1ASMEPTC4.1[19][20]100100×+−=BHLfgη(2.1)LkJ/kgfHkJ/kgBkJ/kg28)100100(33730sssfffyucrCCrCCAL×−+×−××=(2.2)frsrfC%sC%yA%)(RAGpgGGttCWL−′′××′′=(2.3)Gt′′pgCkJ/kg·;GW′′kg/kg;RAt)(RVfmfhhmL−′′×=(2.4)RVhkJ/kgh′′kJ/kgfm%)(936.8RVHhhHL−′′××=(2.5)H%)(RVAmAmAhhWWL−′′×′′×=(2.6)mAWkg/kgbCOCCOCOCOL××′′+′′′′=23560][][][2(2.7)][2′′CO%][′′CO%bCkg/kgβXHHVLR×=(2.8)HHVkJ/kgβX%ASMEPTC4.18ABMA29%5.0=unL(2.9)unRCOmAHmfGucLLLLLLLLL+++++++=(2.10)B100100×−=fbHLη(2.11)2.1.2[21]10010065432×++++−=rQQQQQQη(2.12)η%2QkJ/kg3QkJ/kg4QkJ/kg5QkJ/kg6QkJ/kg)(10065432qqqqq++++−=η(2.13)riiQQq=(i=23456)(2.14)iq%10022×=rQQq(2.15)OHgyQQQ2222+=(2.16)gyQ2kJ/kgOHQ22kJ/kg)(0.2tCVQpygypgygy−××=θ(2.17)pyθgypC.0tpyθkJ/(m3·);gyVm3/kg:0t)(0.2222tCVQpyOHpOHOH−××=θ(2.18)210OHpC2.0tpyθkJ/(m3·)OHV2m3/m3OHV2a.b.c.d.])(293.11009[24.102BDdVWHVwhkcgkpyyyOH+×××++××=α(2.19)kd/cgkV)(0/whD/hpyαyHyW%100)79.59098.10718.35836.126(1243××+×+×+×××=nmgyrHCHCHCOVQq(2.20)ryQCAq××=27.3374(2.21)C%DDqqee×=55(2.22)eq5%eDt/hDt/h2.1.3[22][23][22][23]%100)(32700,××+×+×××=lmlmfhfhhzhznetarguCGCGCGQBq(2.23)hzGfhGlmG/shzCfhClmC211%B/snetarQ,kJ/)()375.0(2352022OROSCCOqyyqu+×+××=(2.24)CO2RO2O%yCyS%)100(,gunetarlkpypyqQhhq−×−=(2.25)pyhlkhkJ/[22][23]2.2123ASMEGB1018488[22][23]41GB1018488ASMEPTC4.1ASME212[22][23]2GB1018488AMSEPTC4.13GB1018488[22][23]ASMEPTC4.1βXβX[24]4[22][23][25]5GB10184882.32.3.11kd0.01/0.03/kd=0.01/213ASME0.002/4.165KJ/0.03/62.48KJ/0.018%0.275%[19]2GB1018488yyyyrcgkOHSCV×−×+×+×=0333.0265.0)375.0(089.0)(0(2.26)yrC/100CACCyyyr×−=(2.27)C%fhfhfhlzlzlzCCCCC−×+−×=100100αα(2.28)ySyHyO%lzαfhα%1008.0)(79.0100375.0866.1)(00ycgkyyrcgyNVSCV×+×+×+×=(2.29)22121Opy−=α(2.30)2O%)()1()(00gkpycgygyVVV×−+=α(2.31)3GB10184881.38kJ/(m3·)1.51kJ/(m3·)2142.3.2123GB10184882.42.4.1rQyCyHyOyNySyWyAlzC2Opyθ0tfhC100)(38.102×−××=rpygyQtVqθ(2.32)fhfhlzlzCCCCC−×+−×=1009.01001.0(2.33)100)(51.1032×−××=rpyOHQtVqθ(2.34)])(293.11009[24.102kcgkpyyyOHdVWHV×××++××=α(2.35)21510027.3374×××=ryQCAq(2.36)[26]DDqqee×=55(2.37)38.05)(82.5−×=eeDq(2.38)5.06=q65432qqqqqq++++=(2.39)q−=100η(2.40)2.4.22Opyθ0tfhC2.4.32.12.22.32.1Table2.1InputparametersrQyCyHyOyNySyWyAlzCMJ/%%%%%%%%13.938.22.393.150.320.379.1846.393.5112.5235.012.143