Experimental Investigation of the Maximum Heat Transport in Triangular Grooves

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1、ExperimentalInvestigationoftheMaximumHeatTransportH.B.MainTriangularGroovesGraduateResearchAssistant.Anexperimentalinvestigationwasconductedandatestfacilityconstructedtomea-G.P.Petersonsurethecapillaryheattransportlimitinsmalltriangulargrooves,similartothoseTennecoProfessorandHead.usedinmic

2、roheatpipes.Usingmethanolastheworkingfluid,themaximumheatFellowASMEtransportanduniteffectiveareaheattransportwereexperimentallydeterminedfortengroovedplateswithvaryinggroovewidths,butidenticalapexangles.Theexperi-DepartmentofMechanicalEngineering,mentalresultsindicatethatthereexistsanoptimu

3、mgrooveconfiguration,whichTexasA&MUniversity,maximizesthecapillarypumpingcapacitywhileminimizingthecombinedeffectsofCollegeStation,TX77843-3123thecapillarypumpingpressureandtheliquidviscouspressurelosses.Whencom-paredwithapreviouslydevelopedanalyticalmodel,theexperimentalresultsindicatethat

4、themodelcanbeusedaccuratelytopredicttheheattransportcapacityandmaximumunitareaheattransportwhengiventhephysicalcharacteristicsoftheworkingfluidandthegroovegeometry,providedtheproperheatfluxdistributionisknown.Theresultsofthisinvestigationwillassistinthedevelopmentofmicroheatpipescapableofop

5、eratingatincreasedpowerlevelswithgreaterreliability.IntroductionMa,1995).Inthismodel,atheoreticalminimummeniscusradiuswasdeterminedandcoupledwiththecombinedef-Atpresentthelimitingcriteriainthemicrominiaturiza-fectsofthecapillarypumpingpressure,theliquidviscoustionofelectroniccomponentsandde

6、vicesaredeterminedpressurelosses,andthevapor/liquidinteraction.Acontrolbythemaximumacceptablejunctiontemperature.Thistem-volumetechniquewasemployedtodeterminetheflowchar-peraturelimitisafunctionofseveralfactors,includingtheacteristicsofmicroheatpipeswithnowicks,andtoincorpo-temperatureunifo

7、rmityofthedeviceandtheheatrejectionratetheeffectsofthefrictionalvapor-liquidinteractiononcapabilityofthecoolingsystememployed.Recently,anum-theliquidflow.Thismodelwasthenusedtocalculatetheberofinvestigationshavebeenperformedtodeterminethemaximumheattrans