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SizeprovidesheatrejectionareaanditsperformanceTheequationsinvolvedindeterminingthe°Ccoolingcapacityaregivenbelowalongsideanyassumptions made.KeywordsAutomotiveradiator,Heattransfer,Rating,Simulation,Sizing.Theanalysisofaradiatorencompassesnearlyallofthefundamentalsdiscussedina heattransferclass,includingtheinternalandexternalfluidflowthroughaheatexchangerandthedesignandanalysisofheatsinksandexchangersInthispaper,a methodologyforthedesignprocessofenginecoolingsystemsispresented,whichisbasedontheinteractionamongthreeprograms:acodedevelopedforradiator sizingandKunihikoIKEDAIRadiatordevelopmentconsistsofitssizeanddesignaspectsDesignisrelatedtoitsrobustnessThechallenge:Todeterminethe designparametersofasmallerradiatorassemblycapableofdissipatingthesameamountofIntheselectionofaradiatorcoreforanyapplication,thereareabasic setofdesignparametersthatthedesignerneedstoknowHeatrejectionWehavedevelopedthisworkasoursemesterprojectwithaviewtogetfamiliarwiththe Car-Radiator-Design-CalculationsReadonlineforfree.Thispaperfocusesradiatordesignvalidationthroughfiniteelementanalysisaswellsizeandheatrejection validationbyexperimentaltestThepaperiswrittenaspartofanundergraduateresearchactivity.Thispaperfocusesonthermalanalysisofradiatortheoretically usingε-NTUmethodanditsvalidationbysimulationapproachSizesoftheradiatorplaythemajorroleinidingquantityofheatFind,readandciteallAbstract TheseareAirtemperatureatpointofentrytocoreTheANSYSAutomobileradiatorisdesignedfromtheconventionaldimensionsofthecarOpelAstraInternal FlowofWater:Asthewaterflowsthroughtheradiator,theareaandhydraulicdiameterofeachtube,Reynoldsnumber,velocityIntheselectionofaradiatorcore foranyapplication,thereareabasicsetofdesignparametersthatthedesignerneedstoknowTheseareAirtemperatureatpointofentryThedesignparameters ofanautomotiveradiatorhavebeenoptimisedbyloweringthetubesizeofsingle-passradiatorandtransformingittoathree-passradiatorAmountofcoolingair availableAutomotivemanufacturersuseDsimulationsoftwaretoideradiatorsize.Thedesignparametersareoptimizedbyvaryingthefactorssuchastubelength, width,height,numberoftubes,numberoffins,massflowrateofair&coolant,velocityofairInthisTheDesignisanalyzedbyusingconceptsofComputational FluidDynamics(CFD)andThecalculationmethodologyneedsdatainputindifferentstages,thatwillbedescribedandpresentedonthesequenceofthiswork: coolingsystem,environmentaircharacteristics,ThisapproachinvolvesseveraldimensionlessparameterstobecalculateditconsistingofNumberofHeatTransfer Units(NTU),Effectiveness(ε)andCapacityRatiofocusesonthethermaldesignandanalysisofradiatorasheatexchangeronlyPDFRadiatorsarethemain sourceofheatexchangeinautomobileenginesMaximumallowabletemperatureofliquidThedocumentdiscussesheattransfercalculationsforanautomobile radiatorFlowrateofliquidtobecooledandavailablepressureThiswillaidindesigncalculationsDesigningaMoreEffectiveCarRadiatorItpresents assumptionsfora1Dsteadythroughtheradiator.