发光学报2018，Vol.39Issue(4)：523-533,11.DOI:10.3788/fgxb20183904.0523
热电制冷LED自然对流散热的设计与优化
Thermal Design and Optimization of LED Integrated with Thermoelectric Cooler in Natural Convection
摘要
Abstract
In order to improve the thermal performance of LED lamp with high heat flux in natural convection,a thermoelectric cooler(TEC) was presented to meet the cooling requirement of a com-pact lamp with single high-power LED. The performance parameters of TEC were determined accu-rately by regression analysis for TEC experimental data at different work status. The equivalent ther-mal circuits of the compact LED modules with TEC and without TEC were established based on elec-trical-thermal analogy. Some mathematic models of equivalent thermal circuits were developed to quickly predict the accurate thermal performance of LED modules following the specified calculation procedure in this paper. The thermal performance analysis results show that the best cooling perform-ance can be obtained at the optimum input TEC current for a specific LED power dissipation. The thermal performance of LED modules with TEC can be superior to that of modules without TEC and be better at low LED power dissipations than at high ones. Two-objective optimization was carried out using three design variables of fin to minimize the junction temperature and fin mass simultane-ously. For the un-optimized and optimized modules, the comparison results of thermal performance demonstrate that the effective operating range of TEC in optimized module performs broader than that in un-optimized module. The LED power dissipation of optimized module can reach a higher per-formance than that of un-optimized one. At the LED power dissipation of 0.493 W, the minimum junction temperature is 15.66 ℃ and much lower than the ambient temperature of 30 ℃. For the LED modules with TEC,the equivalent thermal circuit models presented based on TEC experimental data can contribute to the thermal design,performance analysis and structural optimization.关键词
LED散热/热电制冷/自然对流/等效热路法/优化Key words
LED cooling/thermoelectric cooler/natural convection/thermal circuit method/optimization分类
信息技术与安全科学引用本文复制引用
张建新,韩变华,杨庆新,薛亮,马楷,李海林..热电制冷LED自然对流散热的设计与优化[J].发光学报,2018,39(4):523-533,11.基金项目
国家自然科学基金(51577132,61605145) （51577132,61605145）
天津市自然科学基金(15JCQNJC41800) （15JCQNJC41800）
天津市教委科研计划项目(自然科学)(2017ZD06)资助Supported by National Natural Science Foundation of China(51577132,61605145) （自然科学）
Natural Science Foundation of Tianjin(15JCQNJC41800) （15JCQNJC41800）
Natural Science Research Program of Tianjin Municipal Education Commission(2017ZD06) （2017ZD06）
