低溫翅片管換熱器的設(shè)計(jì)計(jì)算研究.pdf

1、學(xué)校代號(hào)：1073學(xué)號(hào)：P0308070610密級(jí)：公開(kāi)蘭州理工大學(xué)碩士學(xué)位論文yol0322低溫翅片管換熱器的設(shè)計(jì)計(jì)算研究堂僮由遣厶絲芻；昌堡昱咂熊芻墾腿鲞!型拯全(塾援2醫(yī)拯王(麴攫緩壺工2墻差望焦；五迪絲王堂瞳童些芻疊；絲王過(guò)程Il越迨窒攫童目期；!!!!生i旦詮窒簦盎旦塑：!!!!生旦簧整蠶雖金圭韙!隧堂查低溫翅片管換熱器的毆計(jì)計(jì)算研究AbstraetHeatexchangerisco塒如omyusedinpetro】eum，c

2、hemical，utilitypowerandotherfieldsofindust珥Inthispaper，aresearchondes蟾na【ldcalculationoffin—tubeheatexchangerwhichiswidelyusedinlow把mperaturefieldshasbeencarriedout，Anewdesignmethodispresentedthmu出thedesigllofsta卜shapedf

3、in—tubeheatexcha工19era11da11experimentalconfinnationFirstly，throu曲thebriefa11alysisofsteady—stateheatconduction肌dunsteady—stateheatconductionoffin，thispapergivesthecorrespondingfonllulaThenthefeaturesofconVectionheattr赳1

4、sferinpipeareanalyZedaIldthegas湎edprocessofcryogenicnuidisdiVidedintofours詛tesasIiquidphaseforcedconVectionheattransfer，gas—Iiquidtwo—phasefbrcedconvectionheat乜ansfer，1iqujddeprivationforcedconvectionheattmnsferandgaspha

5、seforcedconvectionheat訂ansfeLOnt11ebasisoftlefourstates，designandcalculationmethodofVaporizerisin仃oducednisfoundthatthismethodhasaJladValltageofselectingfbⅡnulawi也thestrongad印tabilityaIldhi曲accuracy，atldmakesdesignmorefe

6、asonableandpreciseAnn—tubeheat“cha工lgerisdesignedwiththegiVenbasicdesignparameteLThedesigngoalisthelengthofnn—tubeThisarticleusesthesubsectiondesignprincipleandtakesthemalcalculationmethodasmefoundationtocompletet11estea

7、dystatedes遠(yuǎn)nofvaporizerbyselectingtheappropriateheattransfercorrespondingfomlula，Becauseofthefactfhatgas繭edprocessofcryogenicfluidisonfhe娃nsteady—s乇ateheattransferconditioninmajorityoftime，thecalculationresultisamaximumv

8、alueThenthisanicleusesaunsteady—statesimplifiedmodeltocarryonthedesignandgetanewresultTlenewresultisaminimumVaIuebecauseofthefktthatthetempemtureoffixedsectionoffin—tubecantendtoastablevalueandthegasmedpmcesscanberegarde

9、dassteady—stateheattraIlsfera舭rvaporizerworkinganotlongtimeAndmeresultisproVedt11rou曲theexperimentandanalysis，althoughgasmedprocessofthecryogenicnuidisattheunsteady—stateheattrallsferconditioninmajorityoftimeBecausethest

10、eady—stateheattransferconformstotheV印orizerpracticalworksituation，thisarticletakesthesteady—statecomputedresultasthebasisaIldmakesthedesignvaIuereduce35％tocompletethedesignwithmakingrefercncetotheunsteady—stateconditionc