Effect of metal 3D-printed composite capillary wick on loop heat pipe characteristics

被引：0
|
作者：
Hu Z. [1 ]
Yuan C. [1 ]
Xu J. [1 ]
Luo T. [1 ]
Zhou Z. [1 ]
机构：
[1] Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 04期
关键词：
3D printing; Composite material; Heat transfer; Loop heat pipe; Phase change;
D O I：
10.16085/j.issn.1000-6613.2021-0719
中图分类号：
学科分类号：
摘要：
The loop heat pipe, abbreviated as the LHP, is an enhanced heat transfer element using phase change of working fluid for heat transfer. It is widely used in the waste heat recovery, the solar collectors and heat dissipation of the electronic devices. The performance of the capillary wick in the LHP evaporator is always focused. The 3D printing wick overcomes the limitations of uneven pore size distribution and high randomness of the sintered wick. Based on the characteristics of the gas-liquid two-phase flow in the LHP evaporator, the upper layer of the wick as the liquid-absorbing layer and the lower layer as the evaporating layer were defined. It was found that when the pore diameters of the evaporation layer are constant, increasing the pore size of the liquid absorbing layer will reduce the superheat in the evaporation zone; reducing the pore size of the liquid absorbing layer will cause dry burning in the evaporation zone, both of them will limit the heat transfer performance of the LHP. In addition, while the pore diameters of the absorbing layer are constant, increasing the pore size of the liquid-absorbing layer will cause heat leakage; reducing the pore size of the evaporating layer can strengthen the heat transfer performance of LHP. The composite capillary wick with a pore size of 100μm for the evaporation layer and 200μm for the absorbing layer has the highest heat transfer coefficient and the highest heat capacity. © 2022, Chemical Industry Press Co., Ltd. All right reserved.
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页码：1715 / 1724
页数：9
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