低溫翅片管換熱器的設(shè)計計算研究.pdf

1、學校代號：1073學號：P0308070610密級：公開蘭州理工大學碩士學位論文yol0322低溫翅片管換熱器的設(shè)計計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計算研究AbstraetHeatexchangerisco塒如omyusedinpetro】eum，c

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

6、asonableandpreciseAnn—tubeheat“cha工lgerisdesignedwiththegiVenbasicdesignparameteLThedesigngoalisthelengthofnn—tubeThisarticleusesthesubsectiondesignprincipleandtakesthemalcalculationmethodasmefoundationtocompletet11estea

7、dystatedes遠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