[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 4, pp.281-287

ISSN: 2508-5107 (Online)

Print publication date 15 Aug 2020

Received 23 Jun 2020 Revised 29 Jul 2020 Accepted 30 Jul 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.4.281

120 W급 LED 가로등 개발을 위한 열전반도체 이용 강제방열

조영태^a^{, *}

Forced Heat Dissipation in 120 W Street LED Using Thermoelectric Modules

Young-Tae Cho^a^{, *}

aDepartment of Basic Science, School of Eng., Jeonju University

Correspondence to: ^*Tel.: +82-63-220-2981 E-mail address: choyt@jj.ac.kr (Young-Tae Cho).

Abstract

This study was carried out to develop 120 W class light-emitting diode (LED) security lights with smaller heat dissipation devices by improving the heat dissipation efficiency compared to existing security lights. Four 30 W class chip-on-board (COB) LED modules were placed in a luminaire, with three modules subjected to forced heat dissipation using thermoelectric elements. The thermoelectric element and LED module were packaged as a unit to improve the performance of the thermoelectric element, and the unit satisfied the optimal conditions for low power energy consumption of the thermoelectric element. When the electric power was 6.4 W, a 24.9% temperature decrease was achieved at the lowest temperature of the metal-core printed circuit board (76.2℃) through forced heat dissipation. Based on the results, the arithmetic lifespan of the LED light could be extended by 100.5%.

Keywords:

COB LED module, Street LED, Forced heat dissipation, Thermoelectric module (TEM), Heat sink

References

Cho, Y. T., Ma, S. D., 2011, Heat Dissipation of High-power Multichip LED Lighting, KSMTE Autumn Conference, 120.
Sterling, B., 2003, Ten Technologies that Deserve to Die, Technology Review: MIT's Magazine of Innovation, 106:8 52-56.
Jung, T. S., Kang, H. K., 2012, Evaluation on the Cooling Performance to Design Heat sinks for LED lightings, Journal of the KSPE, 29:7 778-784. [https://doi.org/10.7736/KSPE.2012.29.7.778]
Han, J. M., Seo, I. J., Ahn, Y., Ko, Y. S., Kim, T. H., 2014, Thermo-compression Process for High Power LEDs, Journal of the KSMTE, 23:4 355-360. [https://doi.org/10.7735/ksmte.2014.23.4.355]
Kim, H. J., Kang, E. Y., Im, S. B., Hoang, G. C., Kim, Y. K., 2015, A Comparative Analysis of Thermal Properties of COB LED Based on Thermoelectric Device Structure, The Journal of the Institute of Internet, Broadcasting and Communication (IIBC), 15:2 189-194. [https://doi.org/10.7236/JIIBC.2015.15.2. 189]
Kang, Y. J., Lee, C. S., Yoo, K. S., Hyun, D. H., 2019, Study on 30W LED Explosion Proof Light Optical System Using Air Driver, Journal of the KSMTE, 28:3 181-187. [https://doi.org/10.7735/ksmte.2019.28.3.181]
Hu, J., Yang, L., Shin, M. W., 2008, Electrical, Optical and Thermal Degradation of High Power GaN/InGaN Light-Emitting Diodes, Journal of Physics D: Applied Physics, 41:3 035107-035111. [https://doi.org/10.1088/0022-3727/41/3/035107]
Narendran, N., Gu, Y., 2005, Life of LED-based White Light Sources, Journal of Display Technology, 1:1 167-170. [https://doi.org/10.1109/JDT.2005.852510]
Cho, Y. T., 2012, Heat Radiation of Multichip 10W LED Light Using Thermoelectric Module(TEM), Journal of the KSMTE, 21:1 46-50. [https://doi.org/10.7735/ksmte.2012.21.1.046]
Han, J. H., Im, K. H., Cho, Y. T., 2019, Forced Heat Dissipation of 30W COB LED with Use of Thermoelectric Modules, Journal of the KSMTE, 28:4 218-223. [https://doi.org/10.7735/ksmte.2019.28.4.218]

Young-Tae Cho

An associate professor at the Dept. of Basic Science, College of Engineering, Jeonju University, Jeonju, Korea.He is interested in LED heat dissipation, infrared thermography nondestructive testing and evaluation of matrials.

E-mail: choyt@jj.ac.kr