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ID:34594467
大小:8.61 MB
页数:61页
时间:2019-03-08
《大功率led散热平板微热管热输运特性研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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
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