Experimental investigation of a PCM-HP heat sink on its thermal performance and anti-thermal-shock capacity for high
Experimental investigation of a PCM-HP heat sink on its thermal performance and anti-thermal-shock capacity for high
复制标题
PCM-HP散热器对大功率LED热性能及抗热冲击能力的实验研究
DOI：
10.1016/j.applthermaleng.2016.07.127
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发表时间：
2016-09-05
影响因子：
6.4
通讯作者：
Yu, Binhai
中科院分区：
文献类型：
--
作者：
Wu, Yuxuan;Tang, Yong;Yu, Binhai
与传统白炽灯和荧光灯相比，大功率led具有许多优点，包括寿命更长、亮度更高和功耗更低。然而，由于其严重的高热流，难以开发有效的热管理，特别是在循环工作模式下，这造成了严重的周期性热应力，限制了进一步的发展。针对上述问题，本文设计了一种相变材料（PCM）基片热管散热器（PCM- hp散热器），由PCM基片、转接板、热管和翅片散热器组成。分别研究了3种内部填充材料、3种LED电源输入和8种LED循环工作模式等不同参数对PCM-HP散热器的热性能和抗热冲击能力的影响。结果表明，PCM-HP散热器具有显著的散热性能，降低了LED的升温速率和峰值温度。更重要的是，当应用于LED循环工作模式时，PCM-HP散热器也显示出优异的抗热冲击能力，并且该容量显示出最佳范围。(C) 2016 Elsevier Ltd.版权所有。
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. (C) 2016 Elsevier Ltd. All rights reserved.