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Journal of Industrial and Environmental Chemistry
|
Volume 2
GREEN CHEMISTRY &
TECHNOLOGY
7
th
International Conference on
J u n e 1 8 - 2 0 , 2 0 1 8 | D u b l i n , I r e l a n d
Dong-Hee Lee et al., J Ind Environ Chem 2018, Volume 2 | DOI: 10.4066/2591-7331-C1-003
HEAT TRANSFER MODELING TO
IMPROVE THE LIFESPAN OF LED BY
AL/CU COMPOSITE HEAT SPREADER
Dong-Hee Lee, Dae-Young Kim
and
Jong-Hyeon Lee
National University, Republic of Korea
L
EDs are known as more environmental than incandescent bulbs and
fluorescent lamps. In addition, LEDs are smaller, durable, longer in life,
brighter in brightness andmuch lower in power consumption compared to
bulbs and fluorescent lamps. The LED structure is very weak against heat.
Therefore, heat dissipation performance is one of the most important
consideration of LED. The heat sink is mostly made of Al series in the
market due to light weight and excellent thermal conductivity. However,
as the output of the LED increases, existing heat-dissipating materials
are facing the limit. Hence, the focus of this study was on improving the
efficiency of LED by changing the thermal conductivity characteristics
of the heat sinks using Al/Cu composite instead of Al heat- dissipating
material. The cooling efficiency of the LED is depended on what the TIM
material is used. So, we calculated the cooling efficiency of LED according
to this TIM material through computer simulation and compared the LED
lifetimes of Cu, Al andAl/Cu composite heat- dissipatingmaterials. Ansys-
CFX was used to calculate the cooling efficiency of the LED according
to TIM thermal resistance, the output of the LED and the ratio of Al/Cu
composite.
Dong-Hee Lee has completed his graduation
in Advanced Material Engineering from Hanbat
University (Republic of Korea). After graduation,
he has started to study Material Science Engi-
neering in the Graduate School of Chungnam
National University. Especially, computational
modeling is primary study field. Heat transfer
modeling has been performed to enhance cool-
ing efficiency of LED.
ldh36427@cnu.ac.krBIOGRAPHY