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1,2,1,1,1(1.,132012;2.,071003):,,,200MW:;;;:TQ051.5:A:100529954(2004)0620027204Calculationandapplicationofheattransferandpressuredropinheatexchangerwithmulti2starthelicalcoiledtubesZHOUYun2long1,SUNBin2,ZHANGLing1,LIYan1,HONGWen2peng1(1.NortheastChinaInstituteofElectricPowerEngineering,Jilin132012,JilinProvince,China;2.NorthChinaElectricPowerUniversity,Baoding071003,HebeiProvince,China)Abstract:Thedesignmethodoftheheatexchangerwithmulti2starthelicalcoiledtubeswasresearchedtomeetofengi2neeringpractice.Thestructuredesignofmulti2starthelicaltubsbundlewaspresented.Thecorrelationstocalculateheattransfercoefficientandpressuredropfortheinsideandoutsideofhelicalcoiledtubeswererecommended.Thedesigncalculationof200MWsteamgeneratorwasmade.Keywords:heatexchanger;heattransfer;pressuredrop;helical2coiledtube,[13]11,,,,,ST1.41.6,1525m/s1Fig.1TheSketchmapofheatexchangerwithmulti2starthelicalcoiledtubesDMSLtan=SLMD(1)25LH,:(1960),,,,,E2mail:zyl@mail.neiep.edu.cn326200412CHEMICALENGINEERING(CHINA)Vol.32No.6Dec.2004SLd=HDMd(L2-H2)-(2)1.41.8Gilli[4](3)AceffAceff=4(D2d-D2c)reff(3)a2(4a1+1)-reff=a1a2lna2+2k12a1-2lna2+2k12(a2+k2)+1a1k112-+2k2+43a22(a31-k32)-1a2(4a1+1)-reff=a1a2lnk3+2k42a1-2lnk3+2k4k3+k5+1-k3a21-12a1+1a1k412-+2k5+43k23(a31-k35)-1,a1=ST/d,a2=(SLcos)/d,k1=[a21+a22/4]-,k2=(a21+a22)-,k3=(4a1+1)-,k4=(a21+k23/4)-,k5=(a21+k23)-,0.322.1()hoGilli[4]:hodKf=0.388 FaeffFiFnGeffdf0.61cpffKf0.333(4):(Geffd/f)2000105,(cpff/Kf)0.110()Fi:Fi=(cos)-0.611-90cos+1000sin/225(5):=(1-/90)(1-k60.25)(6)k6,k6=1,=0,k6=0Fn:Fn=1-0.558n+0.316n2-0.112n3(7)n10,Fn=1, Faeff,,Fa1Fa2, Faeff=(Fa1+Fa2)/2(8)Fa1,a1=a1,a2=eFa2,a1=a1,a2=e-a2,a1=ST/d,a2=(SLcos)/d,e=Ecos/dFa=0.92592a1-0.14268a20.2107(Re10-4)0.034119(9)2.2hi(1)Rogers[5]:Rec=2104diD0.32(10):hidiKf=3.65+0.081+0.8diD0.9GidifacpffKf.(11),a=0.5+0.2903(di/D)0.194:Nu=0.023Re0.85Pr0.4(di/D)0.1(12)(11)(12)(2)[6],:Q= hc(tw-tb)+ hNCB(tw-tsat)(13) h: h= hc+ hNCB(14) hc=0.023G(1-x)df0.8fcpfKf0.4KfdF(15)hNCB=0.00122Kf0.79cpf0.45f0.490.5f0.29hfg0.24g0.24t0.24satp0.75satS(16)FS,[6]822004326x0.8,[7]:Nug=0.023Regx+gf(1-x)0.8Pr0.8g,wY(17),Y=1-0.1fg-10.4(1-x)0.433.1pi=LxLdG22f(18)100ReRecLx=1+0.14diD0.97Gdifa64Gdi/f(19),a=1-0.644(di/D)0.312RecRe22000Lx=1+28800diG/fdiD0.620.3164(diG/f)0.25(20)22000Re150000Lx=1+0.08231+diDdiD0.53Gdif0.250.3164(diG/f)0.25(21)Rec:Rec=23001+8.6diD0.45(22)[8]:pLm=LxG22f1+xfg-1Ldi(23)Lx,,[8]3.2Gilli[4]()ps=3.2732feffCiCnnG22gf(24)Ci():Ci=(cos)-1.8(cos)1.355(25)Cn:Cn=1+0.375n(26)feff,Faeff4863(8632614202205),,200MW1,,22022,1.043m,2.555m,8.212m,3234,[910],,1Tab.1Designparametersinsteamgenerator/MW200/700245/MPa5.88/MPa0.05578/(kgs-1)85/170530/MPa16.67/MPa1.86/(kgs-1)772Tab.2Themaindesignparametersofheatedsurface/mm232.5/mm232.5/mm234.2(ST/d)1.565(SL/d)1.5249/m22110/m13322/m8.212/mm21.23.3/m10/m146923Tab.3Thestructureparametersofmulti2starthelicaltubesbundleinheatedsurfaceD/mmSL/dM110431.46886211151.57036311871.67176412591.51987513311.60677614031.48198714751.55808815471.45259916191.520191016911.587791117631.4897101218381.5506101319071.4649111419791.5202111520511.4442121621231.4949121721951.5456121822671.4735131923391.5203132024111.5671132124831.4987142225551.5421144Tab.4Themainresultsofdesigncalculationinsteamgenerator/(ms-1)19.719.719.7/(kgs-1)858585/(Wm-2-1)2473.132473.132473.1/MPa18.5317.9417.55/170356.71354.89/(kgs-1)777777/MPa17.9417.5516.67/356.71354.89530/(Wm-2-1)266503100013011.35/(Wm-2-1)16671775.5891337.26/68.91120.39186.7/m2807.74343.9313.5/m934036/MW776165/mm232.5232.5234.2/m4.1541.751.5675(1),,M()(2),(3),200MW:cpf,kJ/(kg)Dd,mDc,md,mdi,mG,kg/(sm2)Geff,kg/(sm2)Gi,kg/(sm2)h,m hc,W/(m2) hNCB,W/(m2)hfg,kJ/kgKf,W/(m)Nugn,Prg,wPrQ,W/m2Regtw,tb,tsat,xtsat,psattsat,Paf,g,kg/m3,N/mf,Pas340320043264,WX,[6]:A,m2CD0d,mD,mL,ml,mp,Pap,PaQ,m3/hv,m/s1,()2,(),kg/m3ads,k,efgiLt:[1]CalvertS.AirPollutionVolIV[M].3rded.NewYork:AcademicPress,1977.271.[2]YungSC,CalvertS,BarbariikaHF.VenturiScrubberPerformanceModel[Z].EPARep,1977,600/22772172.[3]AzzopardiBJ,GovanAH.Themodelingofventuriscrub2bers[J].FiltrSep,1984,21(3):196200.[4]GonqalvesJAS,FemandezAlonsoD,MartinsCostaMA,etal.Evaluationofthemodelsavailablepredictionofpressuredropinventuriscrubbers[J].JournalofHaz2ardousMaterials,2001,81(2):123140.[5],.[M].:,2000.50.[6],.[J].,1999,17(5):3538.30:[1].[J].,2000,21(1):3943.[2].10MW[J].,2000,21(6):498502.[3].HTR210[J].,1998,38(5):7274.[4]GilliPV.Heattransferandpressuredropforcrossflowthroughbanksofmultistarhelicaltubewithuniforminclina2tionanduniformlongitudinalpitches[J].NuclearScienceandEngineering,1965,22:298314.[5]RogersGFC.HeattransferandpressurelossinHelical2coiledtubeswithturbulentflow[J].IntJHeatMassTransfer,1964,7:12071216.[6].[M].:,2000.488491.[7].[M].:,2002.[8].(JB/Z201283).,1984.[9]HansW.Frickerdesignandmanufacturingexperienceforthegermanthoriumhigh2temperaturereactor300MW(e)steamgenerator[J].NuclearTechnology,1976,28(3):339347.[10]TakaoHayashi.Comparisonofheattransportcapabilityofasteamgenerator(SG)inahigh2temperaturegas2cooledreactorwiththatofanSGinothertypesofreactors[J].