大功率led散热平板微热管热输运特性-研究

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1、大功率LED散热平板微热管热输运特性研究ResearchonHeatTransportCharacteristicsofFlatMicroHeatPipeforHeatDissipationinHighPowerLEDAbstractLED(1ightemittingdiode)isregardedasanewlightsourcethatcantaketheplaceoftraditionallightsourceinthiscentury．LEDisofbigstrategicsignificanceforthedevelopmentoflow-carbonandresour

2、cesavingsociety．ChinahaslistLEDintothenationalprogramoftheTwelfthFive-yearPlanandtheMediumandlong-termscienceandtechnologyplan．80percentoftheLED’Spowertransformedintoheat，andwiththeincreaseofservicepower。theheatdissipationincreasedimmediately．Iftheheatcouldn’tdissipateintime．whenthetemperatur

3、eexceededaspecificvalue．LEDwouldfail．Thus．howtoimprovetheheatdissipationcapacityisoneoftheproblemsthathi．曲powerLEDshouldsolve．ResearchersinChinaandabroadfocusedtheireyesontheMHP(microheatpipes)nOW．Comparedwiththetraditionalmethodofheatdissipation，IVIHPshavespecialadvantages．suchashi【ghheattra

4、nsferefficiency，goodheattransferperformance，smoothoutsurfaceandsimplestructure，etal。Inrecentyears，MHPhasbeenamainmethodof11ighpowerLED’Sheatdissipationproblem．N正DusedintheheatdissipationofhighpowerLEDWasstudiedinthispaper，andmakeanalysisresearchinthetheoryaspect．Firstofall，theworkingprinciple

5、sofMHPwasdescribed，includingtheformationofcapacityforceandthedefinfionofcontactangle，andanalyzetheheattransportlimitationthatmaybemetintheworkingconditionofMHP．mntheheat仃ansfertheoryofaxialcapacityflowinginthegroovesofMHPswasanalyzed，too．Inthisprocess，theconlrolintheformofdifferentialequation

6、sandLaplace．Youngequationwereusedtobuildone-dimensionalmathematicalmodel．DifferentialequationsweresolvedbyMatLabsoftware，andtheresultsofcapacityforcedistribution,flowingliquidpressandvelocitydistributionintheaxialwerearrived．ThemaximumrateofheattransferofMHPwaspredictedandWasfoundtomeetwithth

7、eexperimentalresults．Numericalsimulation’Scalculationissimple，butthesolutionprecisiondependsontheequation，andahighdimensionmodelisdifficulttoestablish．Onthebasisofthismethod，simulationsoftwaremethodwhichhadhigherprecisionWasusedtoestablishath