Capillary boosting for enhanced heat pipe performance through bifurcation of grooves: Numerical assessment and experimental validation

Saygan, Samet; Akkuş, Yiğit; Dursunkaya, Zafer; Çetin, Barbaros

doi:10.1016/j.icheatmasstransfer.2022.106162

Cited by 20 publications

(2 citation statements)

References 45 publications

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“…The system diagram of the visual and heat transfer experiments for the copper-based MGFHP is presented in Figure 2. The experimental system was composed of heat source, heat sink, measurement and data collection, vacuum pumping, and liquid filling parts [18,19]. The MGFHP was divided into evaporation, adiabatic, and condensation sections.…”

Section: Visual and Heat Transfer Experiments Set-upmentioning

confidence: 99%

Visualization and Heat Transfer Performance of Mini-Grooved Flat Heat Pipe Filled with Different Working Fluids

2022

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Mini-grooved flat heat pipe (MGFHP) possesses the advantages of high compactness, no mechanical component, super thermal conductivity, and excellent temperature uniformity, which can meet the demand for electronic devices efficiently cooling. In this research, visual and heat transfer experiments were performed to investigate the flow and thermal characteristics inside the MGFHP. Fluid flow and distribution are observed to be quite different in the MGFHP containing different working fluids, which is affected by the physical properties of working fluid, the surface state of the grooved wick, and limited working space. Additionally, the input heat, working fluid type, filling ratio, and wettability obviously affect the thermal conductivity and temperature uniformity of the MGFHP. The deionized water-filled MGFHP possesses lower thermal resistance and higher heat transfer capacity than anhydrous ethanol or hexane filled MGFHP, especially for the copper oxide MGFHP filled with deionized water with a filling ratio of 1.0. Thermal resistance, maximum temperature, and temperature nonuniformity at the condensation section of deionized water-filled copper oxide MGFHP are lower than those of the original copper MGFHP by 31.1%, 3.7 °C, and 0.11 °C for the anhydrous ethanol filled MGFHP and 34.4%, 3.1 °C, and 0.13 °C for the hexane filled MGFHP, respectively.

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Section: Visual and Heat Transfer Experiments Set-upmentioning

confidence: 99%

Visualization and Heat Transfer Performance of Mini-Grooved Flat Heat Pipe Filled with Different Working Fluids

2022

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“…The thermal performance of the heat pipe is directly influenced by the capillary structure because it makes capillary pumping easier and provides a flow path for conducting the working fluid inside the heat pipe [13][14][15]. There has been a significant shift toward using sintered metal powder capillary structures in heat pipes due to the fact that gravity has less of an impact on the performance of the structures.…”

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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Experimental study of non-condensable gas effects on sonic limit of sodium heat pipe

Zhang

Miao

Zhang

et al. 2023

Applied Thermal Engineering

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Capillary boosting for enhanced heat pipe performance through bifurcation of grooves: Numerical assessment and experimental validation

Cited by 20 publications

References 45 publications

Visualization and Heat Transfer Performance of Mini-Grooved Flat Heat Pipe Filled with Different Working Fluids

Visualization and Heat Transfer Performance of Mini-Grooved Flat Heat Pipe Filled with Different Working Fluids

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

Experimental study of non-condensable gas effects on sonic limit of sodium heat pipe

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