資源描述：
《Development and evaluation of enhanced heat transfer tubes》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、AppliedThermalEngineeringxxx(2011)1e5ContentslistsavailableatScienceDirectAppliedThermalEngineeringjournalhomepage:www.elsevier.com/locate/apthermengDevelopmentandevaluationofenhancedheattransfertubesa,*bbDavidJ.Kukulka,RickSmith,KevinG.FulleraStateUniv
2、ersityofNewYorkCollegeatBuffalo,1300ElmwoodAvenue,Buffalo,NY14222,USAbVipertex?,658OhioStreet,Buffalo,NY14203,USAarticleinfoabstractArticlehistory:HeattransferenhancementhasbecomepopularrecentlyinthedevelopmentofhighperformanceReceived14November2010ther
3、malsystems.Enhancedsurfacesaretypicallyutilizedtoincreaseheattransfer.ThisstudyevaluatedAccepted15January2011theoverallthermalperformanceofVipertube?EHT,aseriesofenhancedtubesproducedbyVipertex?.AvailableonlinexxxEnhancementheattransferratiosgreaterthan
4、1werefoundforthefourenhancedtubesthatwereevaluatedforsinglephase?owintherangeofReynoldsNumbersnear2900.Keywords:Vipertubesenhanceheattransferthroughacombinationoffactorsthatinclude:increasing?uidEnhancedheattransfersurfacesturbulence,generatingsecondary
5、?uid?owpatterns,disturbingtheboundarylayerandincreasingtheEnhancedtubesheattransfersurfacearea.Additionally,theVipertexsurfacedesignalsominimizestheeffectsoffouling.HeatexchangerdesignBoilertubeAllthesefactorsleadtoanincreaseintheoverallheattransfercoef
6、?cientforbothnewdesignsandEnhancedalloytubessystemsthathaveoperatedovertime.ThreedimensionalheattransfersurfacesSeveralenhancedtubecon?gurationswerestudiedhereusingheattransferandfoulingmeasure-EnhancedASTMA249tubesments.Whencomparedtosmoothtubes,thepat
7、entedVipertubesincreasetheoverallheattransferbymorethan100%andminimizedtherateoffouling.SeveralversionsofVipertexenhancedalloytubesareproducedunderASTMstandards,therebyprovidingaveryimportantadvancementinheattransferdesign.ó2011ElsevierLtd.Allrightsrese
8、rved.1.IntroductiontubeperformancebyGeeandWebb[5];internalenhancementsandroughnesseffectsbyZhouandYao[6],Wangetal.[7],LiuandAwidevarietyofindustrialprocessesinvolvethetransferofJensen[8]andRabasandMitchell[9];corrugatedtubesbyMar
