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1、外文文献原文Optimizationofacentral-heatingradiatorCihatArslanturkandA.FeridunOzgucDepartmentofMechanicalEngineering,FacultyofEngineering,AtaturkUniversity,25240Erzurum,TurkeyFacultyofMechanicalEngineering,IstanbulTechnicalUniversity,Gumussuyu,80191Istanbul,TurkeyAbstractAnapproximateanalyticalmodelha
2、sbeenusedtoevaluatetheoptimumdimensionsofacentral-heatingradiator.Theradiatorproblemisdividedintothreeone-dimensionalfinproblemsandthenthetemperaturedistributionswithinthefinsandheat-transferratefromtheradiatorareobtainedanalytically.Theoptimumgeometrymaximizingtheheat-transferrateforagivenradi
3、atorvolumeandthegeometricalconstraintsassociatedwithproductiontechniques,andthermalconstraintshavebeenfound.Theeffectsofgeometricalandthermalparametersontheradiator’sperformancearepresented.Keywords:Centralheating;Optimization;Radiators1.IntroductionRadiatorsarethemostpopularcentral-heatingemit
4、ters.Astheradiatorishotterthantheairsurroundingit,acertainamountofheatistransferredtotheairandthusthewaterexistsatalowertemperature.Ofthevariousdesignsavailableusuallyequippedwithconvectionfinstoimprovetheirheatoutput,arecommonindomestic,businessandindustrialenvironments.Theuseofcentral-heating
5、radiatorsisthemainformofdomesticheatinginthehomes.Althoughradiatorsareknownasradiator,mostoftheiroutputisbynaturalconvection.Sincetheaveragesurfacetemperatureofacentral-heatingradiatorisgenerallylessthan80 °C,thecontributionofradiativetransfertothetotalheattransferissmallerthanthatofthenaturalc
6、onvectionheattransfer.Becauseofthelowsurfacetemperatures,radiationheattransfertermintheenergybalanceequationscanbelinearizedinthethermalanalysisofsucharadiator.Inthepresentpaper,assumingthatthepredominantmodesofheattransferareconductionandconvection,andtheeffectoftheradiationisignored,anapproxi
7、matemathematicalmodelisconstructedforfindingtemperaturedistributionandheattransferrate.Thedesignandoptimizationoftheseradiatorsorfinsandfinassembliesaregenerallybasedontwoapproachesand:oneistominimizethevolumeormassforagivenamount
