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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,071003):.,,.,.,.:;;:TK123:A:100025781(2002)0220137206ExergyanalyticalmethodbasedonsignalflowdiagramtheoryforthermalsystemofpowerplantZHANGChun-fa,CUIYing-hong(NorthChinaElectricPowerUniversity,Baoding071003,China)Abstract:Signalflowdiagramhasbeenusedwidelyinproblemsoflinearsystem.Forthefirsttimeweappliedthesignalflowdiagramintheanalysisandcalculationofthecoal2firedpowerplantthermalsystem.Itissimpleandconceptuallycleartousethismethodtoanalyzethethermo2economyofthethermalsystemandtheconclusionarecorrect.Thishasexpand2edtheprospectinanalyzingthethermalsystem.Keywords:thermalsystem;signalflowdiagram;exergy2economyanalysis0.,.[1].,,,,.[2],(),,.,,.,,.,,,(symbolic)ö(symbolicönumerical)..,17220024JOURNALOFSYSTEMSENGINEERINGVol.17No.2Apr.,2002:2000209211;:2002201202.:(9407);(060211).©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=aX1+dX4;X1abX1.,:1,,..2,..3,.4,.5,.6.1.2,.,,.P=1$nk=1Pk$knPkk$k,,k.$=1-La+LbLc-LdLeLf+LaLbLc,LdLeLf,322.12.1.1,(,,).,.2.1.2[3],,.,,831172©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=B2öB1;B3+B4,X2=B3öB4(B3B4).2.1.3[4],,.,,G=()ö().,G=()ö()2.2,.2.3,,;,,.2.4,.,,.2.5,,,,.,,,,,.,,,.3200MW(2),.3.1115,B1B37.,B22B1,;,,B20=0.,B1B30,B19.1.11G1=[(B2-B3)+(B4-B5)]öB1X1=(B4-B5)ö(B2-B3)2G2=B7ö(B2-B5-B6-B8)X2=B5öB2,X3=B6öB2,X4=B8öB23G3=B14ö(B4-B9-B10-B11-B12-B13)X5=B9öB4,X6=B10öB4,X7=B11öB4,X8=B12öB4,X9=B13öB44G4=B18ö(B13-B15-B16-B17)X10=B15öB13,X11=B16öB13,X12=B17öB135G5=B19ö(B7+B14+B18)6G6=(B23-B21)öB2278#G7=(B24-B23)öB1687#G8=(B25-B24)ö(B15+B28)96#G9=(B26-B25)ö(B12+B29-B28)X13=B28öB12105#G10=(B27-B26)ö(B11-B29)X14=B29öB1211G11=B31ö(B10+B33+B27)12G12=(B32-B31)öB30133#G13=(B34-B32)ö(B9+B36-B33)X15=B33öB9142#G14=(B35-B34)ö(B8+B37-B36)X16=B36öB8151#G15=(B3-B35)ö(B6-B7)X17=B37öB693120024:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=B1B2=B3+[G1ö(1-X1)]B1B4=G1[X1ö(1-X1)]B1+X2B2B7=G2(1-X2-X3-X4)B2B14=G3(1-X5-X6-X7-X8-X9)B4B18=G4X9(1-X10-X11-X12)B4B19=G5(B7+B14+B18)B23=G6B22+X12X9B4B24=B23+G7X9X11B4B25=B24+G8(X9X10+X8X13)B4B26=B25+G9[X7X14+X8(1-X13)]B4B27=B26+G10X7(1-X14)B4B31=G11B27+G11(X6+X5X15)B4B32=B31+G12B30B34=B32+G13X4X16B2+G13X5(1-X15)B4B35=B34+G14[X3X17+X4(1-X16)]B2B3=B35+G15X3(1-X17)B23.3,(3).3.4,,.10,:G1[X1ö(1-X1)]a17G5G1[X1ö(1-X1)]X9X12G2G11(1-X2-X3-X4)G5G1[X1ö(1-X1)]G7X9X11G11G2(1-X2-X3-X4)G5G1[X1ö(1-X1)]G8(X9X10+X8X13)G11G2(1-X2-X3-X4)G5G1[X1ö(1-X1)G9[X7X14+X8(1-X13)]G11G2(1-X2-X3-X4)G5G1[X1ö(1-X1)]G10X7(1-X14)G11G2(1-X2-X3-X4)G5G1[X1ö(1-X1)]G11(X6+X5X15)G2(1-X2-X3-X4)G5G1[X1ö(1-X1)]G13X5(1-X15)G2(1-X2-X3-X4)G5[G1ö(1-X1)]G2(1-X2-X3-X4)G5bk[G1ö(1-X1)]X2a17G5041172©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:G14[X3x17+X4(1-X16)]G13X4X16X2X9X12G11X2G7X9X11G11X2G8(X9X10+X8X13)G11X2G9[X7X14+X8(1-X13)]G11X2G10X7(1-X14)G11X2G11(X6+X5X15)X2G13X5(1-X15)bkG15X3(1-X17)10,;bk.3:a1=G1ö(1-X1),a2=X2,a3=G1X1ö(1-X1),a4=G15X3(1-X17),a5=G14[X3X17+X4(1-X16)],a6=G13X4X6,a7=X9X12,a8=G7X9X11,a9=G8(X9X10+X8X13),a10=G9[X7X14+X8(1-X13)],a11=G10X7(1-X14),a12=G11(X6+X5X15),a13=G13X5(1-X15),a14=G12,a15=G2(1-X2-X3-X4),a16=G15,a17=G3(1-X5-X6-X7-X8-X9)+G4X9(1-X10-X11-X12),PT=G5G1ö[(1-X1)$]{{X1{1-G14[X3X17+X4(1-X16)]-G13X4X16-G15X3(1-X17)}+X2}[G3(1-X5-X6-X7-X8-X9)+G4X9(1-X10-X11-X12)]+X1G2(1-X2-X3-X4){G11X9X12+G11G7X9X11+G11X8(X9X10+X8X13)+G11G9[X7X14+X8(1-X13)]+G11G10+X7(1-X14)+G11(X6+X5X15)+G13X5(1-X15)}+G2(1-X2-X3-X4)}$=1-G14[X3X17+X4(1-X16)]-G13X4X16-X2G11[X9X12+G7X9X11+G8(X9X10+X8X13+G9[X7X14+X8(1-X13)]+G10X7(1-X14)+X6+X5X15]-X2G13X5(1-X15)-G15X3(1-X17)3.5.3.,,2.3.6,,.3N200-130ö535ö535.,1985,514120024:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.õ(kWõh)-1öàögõ(kWõh)-113MPa34.57355.312MPa34.37357.353534.57355.352534.47356.353534.57355.352734.50356.00.005MPa34.57355.30.008MPa33.67364.64(1),,.,,.(2),,,,,,.:[1].[M].:,1987.528[2].[M].:,1982.2152216[3],.[M].:,1984.1342139[4].[M].:,1988.2452258[5],.[J].,2000,15(1):126:(19452),,,,.:.(19732),,,,.:.241172