缠绕管式换热器的简捷计算

(,,116012)110%(CTHE),1898,,,;,,,,110%1111[1]12,x,::1998-01-13Smax={[(c+d)ö2]2+(a+d)2}1ö2-d,x=(c+d)ö2(1)Smin=a,x=0(2)SmSmaxSmin,:Sm=[2ö(c+d)](c+d)ö20Sdx(3):Sm=a+d2[1+(c+d2a+2d)]1ö2+(a+d)2c+dln{c+d2a+2d+[1+(c+d2a+2d)2]1ö2}-d(4):S0=DmPkSm-(S1+S2)(5):S1=Pa211010ö7kö4(6)S2=Pc2(n-k)lö(410lc)(7)Dm=Di+(k-1)a+kd+Sm(8):De=410S0öL(9)L=210(PDm+kSm)(10)A1998LargeScaleNitrogenousFertilizerIndustry213lcWj:lc=lsinA(11)Wj=lcosAö(PDj)(12)jDj:Dj=Di+(j-1)a+jd+2e(13),e1,m(m),ili,zi,:A0=2mi=1Ai=Pd2mi=1zili(14)112[2],,,,,,,,,:a0=01338FtFiFnRe01610Pr013330(K0öDe)(15),Ft();Fi;FnFi=[cosB]-0161{(1-90)cos+100sin}ö235(16)B2,:B=A(1-A90)(1-k0125)(17)=A+B(18)k,,1;,0Fn=1-01558n+01316n2-01112n3(19),nn10,Fn=1Ft=(Fin-line+Fstaggerd2)(20)Fin-lineFstaggerd[2]113[2]:(Re)c=2300[1+816(diöDm)0145](21)10010Re(Re)cAi={3165+0108[1+018(diöDm)019]ReiiPri01333}(Kiödi)(22)i=015+012903(diöDm)01194(23)(Re)cRe2200010Ai={01023[1+1418(1+diöDm)(diöDm)01333]ReiiPri01333}(Kiödi)(24)i=018-0122(diöDm)011(25)2200010Re150000Ai={01023[1+316(1-diöDm)(diöDm)018]Re018iPri01333}(Kiödi)(26)114K=11öA0+R0+(bd)ö(Kdm)+dö(Aidi)+Ridödi(27)A=Q*Em$tm(28)$tm=$T1-$T2ln($T1$T2)(29):$T1=T1-t2,$T2=T2-t1Em115[2]11511$P0=01334CtCiCnnG202gcQ0(30)Ci=(cosB)-118(cos)11355(31)Cn=019524(1+01375n)(32)Ct=Cin-line+Cstaggerd2(33)Cin-lineCstaggerd[2]11512$Pi=fiG2i2gcQi(ldi)(34)fi=[1+28800Rei(diDm)0162]013164(Rei)0125(35)2,,110%97131(),,,,21111110%212110%110%(,10%),,22,E6E7E8,,E9E10,:,,,1E1E6E7E8E9E10ömöm2ökPaökPaökWöWK-1m-2öK,%19101,8183,818315180,6118,419010351287041559106518929162,58139,3910213156,20145,11114328211765210,24119,169159130,15198,231304619432185,3218526141,221681949112144715180102814727122,2516319143,15155458213031519,3571511123,81453416532187211662301921521141001077144151107611811370163964199168511782813124121243125208102291342315815014510912696911283712517716194158110128145201910516401359172610724411616515973201786201271462310984128651101571102121316441893124191119441826534161676159117291452110%E1E6E7E8E9E10ömöm2ökPaökPaökWöWK-1m-2öK,%16157,6194,4137720194612316172,30108,9120356414668213,25119,181169130,15198,231304316013167,15167874182291108168,8189444310051713,480169180,1111712218016103112161801835114813341001040191113910510620106172135241609711382610088313516341113233111297619461402761368102100641164140-3211811115120781764110851627215100640175162-241433(1),(2),110%,1AbaclizicE1E,ScholzH1W1AdvancesinCryogenicEngi2neering1vol118,NEWYORK:PLENUMPRESS,1973211:,19843,,11:,1983a,m;081199821c(),m;d,m;Dm,m;Sm,m;S0,m2;Di,m;k;n;l,m;lc,m;S1,m2;S2,m2;A0Ai,WöKm2;Re0Rei;Pr0Pri;did,m;K0Ki,WöKm;gc1127108möh2;SHOT-CUTCALCULATIONOFCOILEDTUBULARHEATEXCHANGERSQuPing,WangChangyingandYuYuguo(SchoolofChem1Eng1,DalianUniv1ofTechnol1,Dalian,116012)AbstractMathematicalmodelfortheCoiledTubularHeatExchanger(CTHE)ispresent2ed1SimulationofCTHEoftheoriginaldesigncapacityand110%capacityiscarredout1Theresultshowsthatthemodelisbasicallyresonableandreliable1Keywords:CoiledTubularHeatExchanger,mathematicalmodel,shot2cutcalculation18131