文档介绍：基于烟囱效应的LED散热器设计摘要在我国照明耗电中,城市公共照明占30%,每年支出285亿。半导体光源具有节能,寿命长等优点,若将其广泛用于城市公共照明,可节省大量能源,LED照明由于其节电、环保、长寿命,而被公认为下一带照明技术,将取代现有的各种照明技术【1】。LED为冷光源,怕热,有80%Z多的电能转化为热能,必须有散热措施,虽然LED发光技术已有E跃发展,有每瓦发光达2001m的报导,但LED散热却是LED照明中的大问题,但乂还没得到有效解决的问题,成了LED照明灯普及发展道路上的拦路虎,在自然对流散热器中,可以增加散热表面积和提高气体流速来增强自然对流热交换,在散热器屮,引入轻质的烟囱结构,就可以引入烟囱效应,从而提高气体流速,增强散热器自然对流的热交换能力,同时烟囱效应结构,也能减轻散热器的重量【2】。本文针对基于烟囱效应的LED散热问题做以下研究:首先引入LED灯具设计仿真软件Solid-works,对悬吊式LED灯具进行设计,然后利用Solid-works中的流体散热仿真模块flowsimulation对LED灯具进行仿真,从LED温度剖血图获得温度参数,及温度的变化情况,再将LED灯具再设计,模拟出烟囱效应需要的模型,再次热学仿真,获得温度参数,最后对比两次温度测试结果,得出结论。关键字LED散热烟囱效应Solid-ountsfor30%•Semiconductorlightsourcewithenergysaving,longlifeandotheradvantages,ifitiswidelyusedinurbanpubliclighting,cansavealotofenergy,LEDlightingbecauseofitsenergy-saving,environmentalprotection,longlife,andisrecognizedasthenextareaof1ightingtechnology,willreplacetheexistingvariouslightingtechnologies【1】・LEDiscoldlight,heatintolerance,thereareasmanyas80%ofenergyisconvertedintoheat,theremustbecoolingmeasures,althoughtheLEDlighttechnologyhasbeenrapiddevelopment,hasreached2001mperwattluminouscoverage,buttheheatisLEDLEDlightingthebigproblem,buttheproblemhasnotbeeneffectivelyaddressed,ethestumblingblockontheroadtodevelopment,thenaturalconvectionradiator,youcanincreasethecoolingsurfaceareaandincreasinggasflowratetoenhancethenaturalconvectionheatexchangeintheheatvessel,introducinglightweightchimney,thechimneyeffectcanbeintroducedtoimprovethegasflowrate,naturalconvoctionheatsinktoenhaneeheatexchangecapacity,whi1ethestructureofthechimneyeffect,canalsoreducetheweightoftheradiator[2].Tnthispaper,dothefollowingresearchquestionsfortheLED-basedthermalchimneyeffect:firsttointroduceLEDlightingdesignsimulationsoftwareSolid-works,forsuspendedLEDluminairedesign,andthenuseSolid-worksinthermalsimulationoffluidflowsimulationmodu1eforLEDluminairesimulation,LEDtemperatureprofileobtainedfromthetemperatureparameter,andchangesintemperature,thentheLEDlightingredesignthemodeltosimulatethechimneyeffec