標題: Thermal characterization of shrouded plate fin array on an LED backlight panel
作者: Shyu, Jin-Cherng
Hsu, Keng-Wei
Yang, Kai-Shing
Wang, Chi-Chuan
機械工程學系
Department of Mechanical Engineering
關鍵字: LED;Backlight panel;Shrouded fin;Natural convection
公開日期: 1-十月-2011
摘要: This study experimentally investigates a 348 mm x 558 mm LED backlight panel consisting of 270 1-W LEDs and a plate-fin heat sink in an acrylic housing. Effects of shroud clearance, obstructions at entrance or exit on the overall performance are also examined. The results show that the heat transfer coefficient is very slightly reduced with the rise of shroud clearance from 0 mm to 5 mm, followed by a notable rise but it peaks at a shroud clearance between 10 and 20 mm. A further increase of shroud clearance leads a marginal decrease of heat transfer coefficient. It is found that the maximum temperatures within the LED panel are not necessarily located at the center region due to the edge effect. On the other hand, the temperature variation along the longitudinal direction indicates a local minimum Nusselt number occurring near the exit of LED panel. This unique phenomenon is associated with the development of velocity and temperature field, and is consistent with previous numerical examinations. On the other hand, the obstruction placed at the exit are often severe than at the entrance. (C) 2011 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.applthermaleng.2011.05.019
http://hdl.handle.net/11536/18993
ISSN: 1359-4311
DOI: 10.1016/j.applthermaleng.2011.05.019
期刊: APPLIED THERMAL ENGINEERING
Volume: 31
Issue: 14-15
起始頁: 2909
結束頁: 2915
顯示於類別:期刊論文


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