Investigation the effect of powder type on the capillary pumping performance and wettability

Midiani, Luh Putu Ike; Winaya, I Nyoman Suprapta; Septiadi, Wayan Nata; Sucipta, Made; Putra, Nandy

doi:10.1063/5.0013824

Cited by 3 publications

(1 citation statement)

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“…Because it causes fewer temperature changes throughout the capillary structure of the heat pipe, a high thermal conductivity is ideal for this passive heat transfer mechanism. In earlier investigations, it was suggested that the powder shape and the processing parameters would have an effect on the pore features; nevertheless, their implications on the overall performance of the heat pipe were not well-understood [21][22][23][24][25][26]. Because the impacts of surface roughness, porosity, and pore size, which are dictated by the shape of the powder and the processing parameters used, are not yet fully known, it is desirable to conduct a systematic study on these topics.…”

Section: Introductionmentioning

confidence: 99%

Dependence of Particle Size and Geometry of Copper Powder on the Porosity and Capillary Performance of Sintered Porous Copper Wicks for Heat Pipes

Hoan

Toan

Hung

et al. 2022

Metals

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Permeability and capillary performance are the most important parameters relating to the thermal performance of heat pipes. These parameters are deeply linked to pore structure, which has been influenced by the starting powder utilized. In this paper, the effect of particle size and geometry of copper powder on the porosity and capillary performance of porous wicks were systematically studied. Sintered porous wicks were made from different-sized spherical (58 μm, 89 μm, 125 μm) and dendritic (59 μm, 86 μm, 130 μm) Cu powders. The results demonstrated that the porosity and capillary performance of both types of copper powder increase with particle size due to an increase in the connectivity between internal pores. In comparison to the spherical powder, the dendritic powder demonstrated superior capillary efficiency as well as greater porosity. Additionally, a model was proposed for the capillary performance and permeability of sintered porous copper. The predicted results were quite comparable to the experimental data, demonstrating the effect of the starting powder. These findings suggest that porosity and capillary performance of porous wicks are strongly related to powder geometry as well as particle size.

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