河南科技HenanScienceandTechnology机械与动力工程总第802期第8期2023年4月大功率LED灯干冰喷射散热数值分析宁静红王宁霞刘茂（天津商业大学天津市制冷技术重点实验室，天津300134）摘要：【目的目的】解决大功率LED灯具高效散热问题。【方法方法】以干冰为冷却介质，设计出干冰喷射散热器，通过COMSOL软件研究干冰喷射对功率为300WLED灯的散热特性。【结果结果】仿真试验结果表明，增大干冰流量能明显改善传热效果，流量由7.85mL/s增至23.55mL/s，散热器相同位置处干冰固相分数由0.04增至0.34。增大干冰流速可显著降低基板表面温度，流速由0.1m/s增至0.3m/s，温度约降低26.4%，且随着流速增大，降温效果逐渐减弱。【结论结论】与自然对流和水微喷射阵列冷却方式相比，以干冰为冷却介质的基板表面温度分别降低44.71％和23.44％；与单相射流方式相比，温度降低24.1％。干冰喷射冷却效果明显提升，温度更加均匀。关键词：大功率LED；干冰；喷射升华；散热器；数值模拟中图分类号：TK172文献标志码：A文章编号：1003-5168（2023）08-0031-08DOI：10.19968/j.cnki.hnkj.1003-5168.2023.08.007NumericalAnalysisonHeatDissipationCharacteristicsofDryIceSprayingHigh-PowerLEDLampsNINGJinghongWANGNingxiaLIUMao(TianjinKeyLaboratoryofRefrigerationTechnology,TianjinUniversityofCommerce,Tianjin300134,China)Abstract:[Purposes]Inordertosolveproblemoflow-efficiencyheatdissipationofhigh-powerLEDlamps.[Methods]Adryicecoolingradiatorwasdesignedfortheefficientheatdissipationofhigh-powerLEDlamps,andtheheatdissipationcharacteristicsof300WLEDlampsweresimulatedbyCOMSOLsoftware.[Findings]Theincreaseofdryicevolumeflowsignificantlyimprovestheheatdissipation,whenthevolumeflowincreasesfrom7.85mL/sto23.55mL/s,thedryicesolidfractionatthesamepositionoftheradiatorincreasesfrom0.04to0.34.Theincreaseofdryiceflowratecanreducethesubstratesurfacetemperature,whentheflowrateincreasesfrom0.1m/sto0.3m/sthetemperaturedecreasesbyabout26.4%,andthecoolingeffectgraduallyweakenswiththeincreaseofflowrate.[Conclusions]Comparedwithnaturalconvectionmethodandwatermicrojetarraycoolingsystem,thesubstratesurfacetemperaturereducedby44.71%and23.44%respectively;comparedwiththesingle-phasejetmode,temperature...
