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．LEDisofbigstrategicsignificanceforthedevelo

2、pmentoflow-carbonandresourcesavingsociety．ChinahaslistLEDintothenationalprogramoftheTwelfthFive-yearPlanandtheMediumandlong-termscienceandtechnologyplan．80percentoftheLED’Spowertransformedintoheat，andwiththeincreaseofservicepower。theheatdissipationincreasedimmediatel

3、y．Iftheheatcouldn’tdissipateintime．whenthetemperatureexceededaspecificvalue．LEDwouldfail．Thus．howtoimprovetheheatdissipationcapacityisoneoftheproblemsthathi．曲powerLEDshouldsolve．ResearchersinChinaandabroadfocusedtheireyesontheMHP(microheatpipes)nOW．Comparedwiththetra

4、ditionalmethodofheatdissipation，IVIHPshavespecialadvantages．suchashi【ghheattransferefficiency，goodheattransferperformance，smoothoutsurfaceandsimplestructure，etal。Inrecentyears，MHPhasbeenamainmethodof11ighpowerLED’Sheatdissipationproblem．N正Dusedintheheatdissipationofh

5、ighpowerLEDWasstudiedinthispaper，andmakeanalysisresearchinthetheoryaspect．Firstofall，theworkingprinciplesofMHPwasdescribed，includingtheformationofcapacityforceandthedefinfionofcontactangle，andanalyzetheheattransportlimitationthatmaybemetintheworkingconditionofMHP．mnt

6、heheat仃ansfertheoryofaxialcapacityflowinginthegroovesofMHPswasanalyzed，too．Inthisprocess，theconlrolintheformofdifferentialequationsandLaplace．Youngequationwereusedtobuildone-dimensionalmathematicalmodel．DifferentialequationsweresolvedbyMatLabsoftware，andtheresultsofc

7、apacityforcedistribution,flowingliquidpressandvelocitydistributionintheaxialwerearrived．ThemaximumrateofheattransferofMHPwaspredictedandWasfoundtomeetwiththeexperimentalresults．Numericalsimulation’Scalculationissimple，butthesolutionprecisiondependsontheequation，andah

8、ighdimensionmodelisdifficulttoestablish．Onthebasisofthismethod，simulationsoftwaremethodwhichhadhigherprecisionWasusedtoestablishath