Experimental investigation of a PCM-HP heat sink on its thermal performance and anti-thermal-shock capacity for high-power LEDs. (5th September 2016)

• Record Type: Journal Article
• Authors: Wu, Yuxuan; Tang, Yong; Li, Zongtao; Ding, Xinrui; Yuan, Wei; Zhao, Xuezhi; Yu, Binhai
• Is Part Of: Applied thermal engineering. Volume 108(2016:Sep.)
• Page Start: 192
• Page End: 203
• Publication Date: 2016-09-05
• Subjects: LED -- Cooling -- Phase-change material (PCM) -- Heat pipe -- Thermal management; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.07.127
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: A phase-change material (PCM) base heat pipe heat sink (PCM-HP heat sink) is designed. The PCM-HP heat sink can significantly lower the LED heating rate and temperature. The PCM-HP heat sink achieves a best anti-thermal-shock capacity in LED cyclic working modes. Abstract: High-power LEDs demonstrate a number of benefits compared with conventional incandescent lamps and fluorescent lamps, including a longer lifetime, higher brightness and lower power consumption. However, owing to their severe high heat flux, it is difficult to develop effective thermal management of high-power LEDs, especially under cyclic working modes, which cause serious periodic thermal stress and limit further development. Focusing on the above problem, this paper designed a phase-change material (PCM) base heat pipe heat sink (PCM-HP heat sink) that consists of a PCM base, adapter plate, heat pipe and finned radiator. Different parameters, such as three types of interior materials to fill the heat sink, three LED power inputs and eight LED cyclic working modes, were separately studied to investigate the thermal performance and anti-thermal-shock capacity of the PCM-HP heat sink. The results show that the PCM-HP heat sink possesses remarkable thermal performance owing to the reduction of the LED heating rate and peak temperature. More importantly, an excellent anti-thermal-shock capacity of the PCM-HP heat sink is also demonstrated when applied in LED cyclic working modes, and this capacity demonstrates the best range.