Effect of Particle Morphology and Surface Wettability on Performance of Porous Wick and Loop Heat Pipe

被引：0

作者：

Guo H. ^{[1
]}

Ji X. ^{[1
]}

Xu J. ^{[1
]}

机构：

[1] Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy, North China Electric Power University, Beijing

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2020年 / 56卷 / 14期

关键词：

Heat transfer; Particle morphology; Porosity; Porous wick; Pumping performance; Wettability;

D O I：

10.3901/JME.2020.14.173

中图分类号：

学科分类号：

摘要：

Two kinds of loop heat pipe (LHP) porous wick with different structures are sintered by spherical copper powder and the branch copper powder witch particle size is 63.5 μm and 66.0 μm. The wettability of the porous wick is improved by chemical oxidation with H2O2. The effects of particle morphology and wettability on the porous wick liquid absorption and LHP heat transfer performance are analyzed. The results show that the working fluid has a fast climbing rate in the porous wick of branch particles. When the porous wick is hydrophilic, the suction time for distilled water climbing to 18.0 cm in the branch porous wick is about 85.0 s less than that of the spherical porous wick, and the total liquid absorption mass is larger, which is 2.0 times larger than that of the spherical porous wick. The surface layer of the porous wick has nano-scale structure oxidized by H2O2, which enhances the hydrophilicity of the porous wick and improves the liquid absorption performance. Compared with spherical particle capillary LHP, branch particle capillary LHP operates at a lower temperature. When the heating power is 280 W, the operating temperature decreases by 7.6℃. © 2020 Journal of Mechanical Engineering.

引用

页码：173 / 179

页数：6

共 24 条

[1]

JOUHARA H, ALMAHMOUD S, CHAUHAN A, Et al., Experimental and theoretical investigation of a flat heat pipe heat exchanger for waste heat recovery in the steel industry, Energy, 141, pp. 1928-1939, (2017)

[2]

MA H T, DU N, ZHANG Z Y, Et al., Assessment of the optimum operation conditions on a heat pipe heat exch- anger for waste heat recovery in steel industry[J], Rene- wable and Sustainable Energy Reviews, 79, pp. 50-60, (2017)

[3]

REMELI M F, DATE A, SINGH B, Et al., Passive power generation and heat recovery from waste heat, Advanced Materials Research, 1113, pp. 789-794, (2015)

[4]

ZHOU G H, LI J, LV L C., An ultra-thin miniature loop heat pipe cooler for mobile electronics, Applied Thermal Engineering, 109, pp. 514-523, (2016)

[5]

TANG Yong, TANG Heng, WAN Zhenping, Et al., Deve- lopment status and perspective trend of ultra-thin micro heat pipe, Journal of Mechanical Engineering, 53, 20, pp. 131-144, (2017)

[6]

BUFFONE C, COULLOUX J, ALONSO B, Et al., Capillary pressure in graphene oxide nanoporous mem- branes for enhanced heat transport in loop heat pipes for aeronautics, Experimental Thermal and Fluid Science, 78, pp. 147-152, (2016)

[7]

TANG Y., An essay on the cohesion of fluids[J], Philosophical Transactions of the Royal Society of London, 95, pp. 65-87, (1805)

[8]

ELVA M, RENE R., The pool boiling heat transfer enhancement from experiments with binary mixtures and porous heating covers, Experimental Thermal and Fluid Science, 30, 3, pp. 185-192, (2006)

[9]

CHI S W., Heat pipe theory and practice, (1976)

[10]

LI H, WANG X G, LIU Z S, Et al., Experimental investigation on the sintered wick of the anti-gravity loop-shaped heat pipe[J], Experimental Thermal and Fluid Science, 68, pp. 689-696, (2015)

← 1 2 3 →