Title :
Research on Porous Micro Heat Sink for Heat Dissipation of High Power LEDs
Author :
Liu Xibin ; Wan Zhongmin ; Chen Min ; Liu Jing ; Guan Qiong
Author_Institution :
Dept. of Phys., Hunan Inst. of Sci. & Technol., Yueyang, China
Abstract :
A porous micro heat sink system is presented for cooling of high power LEDs, which has high heat transport capability. The operational principle and heat transfer characteristics of porous micro heat sink are analyzed. Numerical model for the micro heat sink is proposed to describe liquid flow and heat transfer based on the local thermal equilibrium of porous media, and it is solved with SIMPLE algorithm. The numerical results show that the heated surface temperature of porous micro heat sink is low at high heat fluxes and the maximal temperature of heated surface is only 55.2 ¿ at the heat flux of 200 W/cm2. Increasing inlet fluid velocity can decrease the temperature in the micro heat sink and the heated surface temperature.
Keywords :
cooling; flow through porous media; heat sinks; light emitting diodes; micromechanical devices; SIMPLE algorithm; heat dissipation; heat transfer characteristics; heat transport capability; heated surface temperature; high power LED; inlet fluid velocity; light emitting diodes; liquid flow; numerical model; porous media; porous micro heat sink system; Cooling; Energy management; Fluid flow; Heat sinks; Heat transfer; Light emitting diodes; Power system management; Power system reliability; Temperature; Thermal management;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4812-8
Electronic_ISBN :
978-1-4244-4813-5
DOI :
10.1109/APPEEC.2010.5448465
