The daytime running light (DRL) is a special lamp; they can be automatically switched on when the engine is started, and hence substantially increase the visibility of motor vehicles. Comparing to traditional light sources in DRL, LED offers many advantages such as its high lighting efficacy, low power consumption, quick response time, and long lifetime, However, the application of high brightness LED on DRL still faces severe thermal challenge in removing the unavoidable dissipation heat, which directly influences the radiation efficiency, emitted light quality, and lifetime of LED. Therefore, this investigation focuses on the thermal management for LED Daytime Running Lamp through an integrated effort of CFD simulation, CNC mockup fabrication, and experimental verification. At first, a comprehensive CFD simulation is executed to check the heat-removing performance of several thermal modules for identifying the efficient thermal design. Thereafter, this LED module integrated with a Zinc-Al alloy casing is fabricated via the die-casting and carried out the thermal performance measurements for experimentally validating the numerical outcomes. As a result, after taking the contact resistance and radiation into account, the comparison between numerical and experimental results indicates an acceptable deviation percentage within 5%. Also, experimental result shows that the LED junction temperature is located within the range of 50∼51°C for the case of a 2.34-Watt power input and a 35°C environmental temperature. Moreover, for a 10-Watt power input, the numerical calculation predicts that LED junction temperature is 88.6°C, which is still well below the safety limit (120°C). In conclusion, the accomplishment of this research offers a rigorous and systematic design scheme for the thermal management of the LED DRL. This design scheme has successfully produced an efficient thermal module to control the LED chip temperature below safety limit.
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ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis
July 12–14, 2010
Istanbul, Turkey
Conference Sponsors:
- International
ISBN:
978-0-7918-4916-3
PROCEEDINGS PAPER
Integrated Numerical and Experimental Study on the Thermal Management for LED Daytime Running Lamp
Sheam-Chyun Lin,
Sheam-Chyun Lin
National Taiwan University of Science and Technology, Taipei, Taiwan
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Ming-Chou Shen,
Ming-Chou Shen
University of Far East, Tainan, Taiwan
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Kuang-Ting Cheng,
Kuang-Ting Cheng
The Automotive Research and Test Center, Lugang, Taiwan
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Jin-Tsing Hong,
Jin-Tsing Hong
National Taiwan University of Science and Technology, Taipei, Taiwan
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Hsien-Chang Shih
Hsien-Chang Shih
National Taiwan University of Science and Technology, Taipei, Taiwan
Search for other works by this author on:
Sheam-Chyun Lin
National Taiwan University of Science and Technology, Taipei, Taiwan
Ming-Chou Shen
University of Far East, Tainan, Taiwan
Kuang-Ting Cheng
The Automotive Research and Test Center, Lugang, Taiwan
Jin-Tsing Hong
National Taiwan University of Science and Technology, Taipei, Taiwan
Hsien-Chang Shih
National Taiwan University of Science and Technology, Taipei, Taiwan
Paper No:
ESDA2010-24441, pp. 551-560; 10 pages
Published Online:
December 28, 2010
Citation
Lin, S, Shen, M, Cheng, K, Hong, J, & Shih, H. "Integrated Numerical and Experimental Study on the Thermal Management for LED Daytime Running Lamp." Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 2. Istanbul, Turkey. July 12–14, 2010. pp. 551-560. ASME. https://doi.org/10.1115/ESDA2010-24441
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