激光与光电子学进展, 2017, 54 (9): 092303, 网络出版: 2017-09-06   

LED圆筒太阳花散热器设计与实验 下载: 562次

Design and Experiment of LED Cylindric Sunflower Radiator
作者单位
华侨大学信息科学与工程学院福建省光传输与变换重点实验室, 福建 厦门 361021
摘要
为了提高发光二极管(LED)的散热能力, 基于烟囱效应, 在传统太阳花散热器外侧加装圆筒壁, 形成特殊的烟囱结构。运用Solidworks软件构建三维模型, 用其插件Flow Simulation进行热仿真, 并以散热器翅片数12个、最大直径70 mm、高度40 mm为基础模型参数, 进行优化研究。研究表明, 在翅片数为20个、最大直径为85 mm、高度为65 mm时, LED圆筒太阳花散热器的散热效果最好。此时, LED的最高温度为48.98 ℃, 比优化前降低了13.05 ℃。当功率为8, 12, 16, 19 W时, LED芯片的最高温度都满足LED工作的安全要求。对功率为8 W的LED散热器样品的实验测试结果表明, 4个监测点的实际温度与仿真所得温度的平均误差为4.8%, 在允许范围内, 验证了研究的正确性。在功率为32 W时, 配备圆筒太阳花散热器的芯片最高温度仍满足低于125 ℃的技术要求, 并比配备传统太阳花散热器的芯片温度低6.44 ℃。所设计的LED圆筒太阳花散热器为解决大功率LED散热问题提供了一个新的途径。
Abstract
In order to improve the cooling capacity of light emitting diode (LED), based on the principle of the chimney effect, the cylinder is added to traditional sunflower radiator to form a special chimney structure. We build a three-dimensional model by adopting Solidworks, and use its plug called Flow Simulation to simulate the model. The model with the number of fins of 12, the maximum diameter of 70 mm and the hight of radiator of 40 mm is optimized. Studies have shown when the number of fins is 20, the maximum diameter is 85 mm and the hight of radiator is 65 mm, LED cylindric sunflower radiator have the best cooling capacity. At the moment, the optimized highest temperature of LED is 48.98 ℃, which is reduced by 13.05 ℃. The temperature of the LED can meet the security requirements when the power of the LED chips are 8, 12, 16, 19 W. The LED radiator sample with the power of 8 W is experimentally tested. The results show that the average error between the actual temperature of the 4 monitoring points and the simulated temperature is 4.8%, which is within the allowable range. It confirms the correctness of the simulation steps. When the power is 32 W, the highest temperature of the LED chips still meet the technical requirements of less than 125 ℃. Which is 6.44 ℃ lower than that of the traditional sunflower radiator. In conclusion, the designed LED cylindric sunflower radiator can provide a new way to solve the heat dissipation problem of high power LED.

唐帆, 郭震宁. LED圆筒太阳花散热器设计与实验[J]. 激光与光电子学进展, 2017, 54(9): 092303. Tang Fan, Guo Zhenning. Design and Experiment of LED Cylindric Sunflower Radiator[J]. Laser & Optoelectronics Progress, 2017, 54(9): 092303.

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