DOI QR코드

DOI QR Code

Thermal Characteristics of the design on Residential 13.5W COB LED Down Light Heat Sink

주거용 13.5W COB LED 다운라이트 방열판 설계에 따른 열적 특성 분석

  • Kwon, Jae-hyun (Information and communication engineering, Wonkwang University) ;
  • Lee, Jun-myung (Information and communication engineering, Wonkwang University) ;
  • Kim, Hyo-jun (Information and communication engineering, Wonkwang University) ;
  • Kang, Eun-young (Information and communication engineering, Wonkwang University) ;
  • Park, Keon-jun (Wonkwang university)
  • Received : 2014.01.07
  • Accepted : 2014.01.27
  • Published : 2014.03.31

Abstract

There are several severe problems for LED device, the next generation's economy green lighting: as the temperature increases, the lamp efficiency decreases; if the temperature is over $80^{\circ}C$, the lifetime of lighting decreases; Red Shift phenomenon that wavelength of spectrum line moves toward long wavelength occurs; and optical power decreases as $T_j$ increases. Thus, Heat sink design that can minimize the heat of LED device is currently in progress. While the thermal resistance of COB Type LED was reduced by direct coupling of LED chip to the board, residential 13.5W requires Heat sink in order resolve heat issue. This study designed Heat Sink suitable for residential 13.5W COB LED down-light and selected the optimum Fin thickness through flow simulation that packaged the designed Heat Sink and 13.5W COB. And finally it analyzed and evaluated the thermal modes using contacting thermometer.

차세대 친환경 조명인 LED소자는 온도가 올라갈수록 LED의 발광효율이 떨어지고 $80^{\circ}C$이상 올라갈수록 수명이 감소하고 스펙트럼선의 파장이 본래의 파장보다 장파장 쪽으로 이동하는 Red Shift현상 및 $T_j$ 상승에 따라 광 출력이 감소되는 큰 문제점이 대두되고 있어 열을 최소화 할 수 있는 방열설계 연구가 진행 중이다. COB Type LED의 경우 보드에 LED 칩을 직접 결합시켜 열 저항을 낮췄지만 주거용 13.5W의 경우 방열판을 통해 발열 문제를 해결해야한다. 본 논문에서는 주거용 13.5W COB LED 다운라이트에 맞게 Heat Sink를 설계하고, 그 설계한 Heat Sink와 13.5W COB를 패키징하여 Solidworks flow simulation을 통해 최적의 Fin두께를 선정하여 접촉식 온도계를 사용한 열적 특성을 분석 하고 평가 하였다.

Keywords

References

  1. G. B. Hong, T. S. Jang and Y. K. Kim, "A Study on Receiving Characteristic Analysis of LED Visible Light Communication System based on Remote Dimming Control," KIIECT, Vol.4, No.3, pp. 153-157, 2011.
  2. I. S. Eo, "Analyze on Heat-Sink of LED Lighting Fixture using CF-design," KAIS, Vol 9, No. 6, pp 1565-1568, 2008.
  3. S. Nakamura, T. Mukai, and M. Senoh, "Candela class high-brightness InGaN/AlGaN double heterostructure blue light emitting diodes," Applied Physics Letter, vol. 64, no. 13, pp. 1687-1689, Mar 1994. https://doi.org/10.1063/1.111832
  4. Y. L. Lee and S. H. Hwang, "Study on Thermal Design of a 3W MR16 Light with single High-Power LED," Journal of the KAICS, vol. 11, no. 4, pp. 1203-1209, May 2010.
  5. S. H. Yu, K. S. Lee and S. J. Yook, "Natural Convection around Radial HeatSink," International Journal of Heat and Mass Transfer, vol. 53, no. 13-14, pp. 2935-2938, Jun 2009.
  6. T.S. Jung and H.K. Kang, "Investigation of Natural Convective Heat Flow Characteristics of Heat Sink" Korean Soc. Mech. Eng. Vol. 37, No. 1, pp. 27-33, 2013. https://doi.org/10.3795/KSME-B.2013.37.1.027
  7. Yonemura Naomi, "TechnoTimes of Japan," Monthly display, Feb 2007.

Cited by

  1. 고출력 무전극램프의 가스압 및 아말감종류에 따른 특성분석 및 최적화에 관한 연구 vol.10, pp.1, 2017, https://doi.org/10.17661/jkiiect.2017.10.1.23
  2. 고출력 무전극램프의 점등회로 설계를 통한 특성분석 및 최적화에 관한 연구 vol.10, pp.1, 2017, https://doi.org/10.17661/jkiiect.2017.10.1.31