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| 基于热阻网络的大功率LED热管散热研究 | |
| 引用本文： | 王志斌,张跃宾,王忠东,解莎莎,郝阳. 基于热阻网络的大功率LED热管散热研究[J]. 应用光学, 2012, 33(6): 1014-1018 |
| 作者姓名： | 王志斌 张跃宾 王忠东 解莎莎 郝阳 |
| 作者单位： | 1.燕山大学,电气工程学院,河北 秦皇岛 066004; |
| 基金项目： | 国家自然科学基金，黑龙江省自然科学基金 |
| 摘 要： | LED结温高一直是大功率LED发展的技术瓶颈，随着单位热流密度的不断攀升，在自然冷却条件下，单纯的直肋热沉散热方式已不能满足散热要求。应用热管技术设计了热管散热系统，对该系统的传热机理和传热路线进行分析，建立该系统对应的热网络模型，对各部分热阻进行分析与计算，求得总的理论总热阻，计算得出理论结温；同时应用有限元方法对该系统进行仿真分析，对LED模块（0.025 m0.025 m0.005 m）输入30 W 电功率，得出其仿真结温稳定在58.19℃，满足结温小于65℃的要求，说明应用热管的散热系统满足设计要求。由热阻网络模型计算得出的理论结温为57.43℃，与仿真结果相差0.76℃，其误差仅为1.31％，验证了理论分析计算的正确性，对实际工程中热设计具有指导意义。 |
| 关 键 词： | 散热 热管 大功率LED 有限元 |
Heat pipe heat sink of high power LED based on thermal resistance network |
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| WANG Zhi-bin , ZHANG Yue-bin , WANG Zhong-dong , XIE Sha-sha , HAO Yang. Heat pipe heat sink of high power LED based on thermal resistance network[J]. Journal of Applied Optics, 2012, 33(6): 1014-1018 | |
| Authors: | WANG Zhi-bin ZHANG Yue-bin WANG Zhong-dong XIE Sha-sha HAO Yang |
| Affiliation: | 1.College of Electrical Engineering ,Yanshan University,Qinhuangdao 066004,China;2.School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China |
| Abstract: | High junction temperature of LED has been the technical bottleneck of the development of high power LED. With the rising of heat flux density, the simple straight fin heat sink can not meet the requirement of heat dissipation in natural cooling conditions. We set up a heat dissipation system based on the heat pipe technology, analyzed the heat transfer mechanism and the route of heat dissipation ,then established the model of thermal network according to the physical model and calculated the thermal resistance of each part, finally got the total theoretical thermal resistance and the LED junction temperature. At the same time, we made a simulation analysis of this heat dissipation system by using the finite element method. Simulation results of the LED module(0.025 m×0.025 m×0.005 m) with 30 W input power show that the junction temperature of LED stable is at 58.19℃, less than 65℃ which is the deadline of requirement. The cooling system applying the heat pipe meets the requirement of design well. The theoretical junction temperature calculated by thermal model is 57.43℃,only 0.76℃ less than the simulation result, implying the error is only 1.31%,this validates the theoretical analysis calculation ,which has guiding significance for practical engineering design. |
| Keywords: | heat dissipation heat pipe high power LED finite element |
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