NUMERICAL OPTIMIZATION OF LUMINAIRES LEVEL HEAT DISSIPATION STRUCTURE FOR LEDS UNDER NATURAL CONVECTION
Wu Ke, Wang Le, Yu Yi-Bo, Sun Da-Ming, Huang, Zhi-Yi, Gu Pei-Fu
Abstract:
Improving heat dissipation performance of LED lamps is of great significance to large-scale application of LED. The method of opening was adopted to modify the luminaires level heat dissipation structure in this study. Furthermore, natural convection heat rejection of LED lamp was simulated by computational fluid dynamics (CFD) method before and after the structural modification. As shown by computational results, opening was prone to forming bottom-up natural convection and achieved the goals of eliminating local circulation and improving heat transfer performance. Under the same computational condition, the highest temperature of radiator decreased by about 8 ℃ and average heat transfer coefficient increased by 43.3%. Analysis based on field synergy principle indicated that opening improved the synergy between flow field and temperature field, and effectively decreased the heat resistance of radiator of the same heat transfer area.
Keywords:
LED, Computational fluid dynamics, Luminaires level Heat Dissipation Structure, Field synergy principle, natural convection
Download:
IMEKO-TC2-2010-12.doc
DOI:
-
Event details
IMEKO TC:
TC2
Event name:
TC2 Symposium 2010
Title:
19th Symposium on Photonic Measurements
Place:
Hangzhou, CHINA
Time:
11 September 2010 - 13 September 2010
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