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1、外文文献原文Optimizationofacentral-heatingradiatorCihatArslanturkandA.FeridunOzgucDepartmentofMechanicalEngineering,FacultyofEngineering,AtaturkUniversity,25240Erzurum,TurkeyFacultyofMechanicalEngineering,IstanbulTechnicalUniversity,Gumussuyu,80191Istanbul,TurkeyAbstractAnapproximateanalyticalmode
2、lhasbeenusedtoevaluatetheoptimumdimensionsofacentral-heatingradiator.Theradiatorproblemisdividedintothreeone-dimensionalfinproblemsandthenthetemperaturedistributionswithinthefinsandheat-transferratefromtheradiatorareobtainedanalytically.Theoptimumgeometrymaximizingtheheat-transferrateforagiv
3、enradiatorvolumeandthegeometricalconstraintsassociatedwithproductiontechniques,andthermalconstraintshavebeenfound.Theeffectsofgeometricalandthermalparametersontheradiator’sperformancearepresented.Keywords:Centralheating;Optimization;Radiators1.IntroductionRadiatorsarethemostpopularcentral-he
4、atingemitters.Astheradiatorishotterthantheairsurroundingit,acertainamountofheatistransferredtotheairandthusthewaterexistsatalowertemperature.Ofthevariousdesignsavailableusuallyequippedwithconvectionfinstoimprovetheirheatoutput,arecommonindomestic,businessandindustrialenvironments.Theuseofcen
5、tral-heatingradiatorsisthemainformofdomesticheatinginthehomes.Althoughradiatorsareknownasradiator,mostoftheiroutputisbynaturalconvection.Sincetheaveragesurfacetemperatureofacentral-heatingradiatorisgenerallylessthan80 °C,thecontributionofradiativetransfertothetotalheattransferissmallerthanth
6、atofthenaturalconvectionheattransfer.Becauseofthelowsurfacetemperatures,radiationheattransfertermintheenergybalanceequationscanbelinearizedinthethermalanalysisofsucharadiator.Inthepresentpaper,assumingthatthepredominantmodesofheattransferareconductionandconvection,andtheeffectoftheradiationi
7、signored,anapproximatemathematicalmodelisconstructedforfindingtemperaturedistributionandheattransferrate.Thedesignandoptimizationoftheseradiatorsorfinsandfinassembliesaregenerallybasedontwoapproachesand:oneistominimizethevolumeormassforagivenamount
