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1、外文文献原文Optimizationofacentral-heatingradiatorCihatArslanturkandA.FeridunOzgucDepartmentofMechanicalEngineering,FacultyofEngineering,AtaturkUniversity,25240Erzurum,TurkeyFacultyofMechanicalEngineering,IstanbulTechnicalUniversity,Gumussuyu,80191Istanbul,TurkeyAbstractAn
2、approximateanalyticalmodelhasbeenusedtoevaluatetheoptimumdimensionsofacentral-heatingradiator.Theradiatorproblemisdividedintothreeone-dimensionalfinproblemsandthenthetemperaturedistributionswithinthefinsandheat-transferratefromtheradiatorareobtainedanalytically.Theop
3、timumgeometrymaximizingtheheat-transferrateforagivenradiatorvolumeandthegeometricalconstraintsassociatedwithproductiontechniques,andthermalconstraintshavebeenfound.Theeffectsofgeometricalandthermalparametersontheradiator’sperformancearepresented.Keywords:Centralheati
4、ng;Optimization;Radiators1.IntroductionRadiatorsarethemostpopularcentral-heatingemitters.Astheradiatorishotterthantheairsurroundingit,acertainamountofheatistransferredtotheairandthusthewaterexistsatalowertemperature.Ofthevariousdesignsavailableusuallyequippedwithconv
5、ectionfinstoimprovetheirheatoutput,arecommonindomestic,businessandindustrialenvironments.Theuseofcentral-heatingradiatorsisthemainformofdomesticheatinginthehomes.Althoughradiatorsareknownasradiator,mostoftheiroutputisbynaturalconvection.Sincetheaveragesurfacetemperat
6、ureofacentral-heatingradiatorisgenerallylessthan80 °C,thecontributionofradiativetransfertothetotalheattransferissmallerthanthatofthenaturalconvectionheattransfer.Becauseofthelowsurfacetemperatures,radiationheattransfertermintheenergybalanceequationscanbelinearizedint
7、hethermalanalysisofsucharadiator.Inthepresentpaper,assumingthatthepredominantmodesofheattransferareconductionandconvection,andtheeffectoftheradiationisignored,anapproximatemathematicalmodelisconstructedforfindingtemperaturedistributionandheattransferrate.Thedesignand
8、optimizationoftheseradiatorsorfinsandfinassembliesaregenerallybasedontwoapproachesand:oneistominimizethevolumeormassforagivenamount
