Characterization of a Copper Powder for Heat Pipe Wick Applications

Bartmeyer, Guilherme Antonio; Krambeck, Larissa; Silva, Robson Couto da; Fusão, Davi; Alves, Thiago Antonini

doi:10.22161/ijaers.5.10.7

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…The effective thermal conductivity of the sintered copper capillary structure is presented in The theoretical model can be calculated, 15.55 W/mK, since the average porosity of this sintered structure is 55.03% [7]. As a result, the experimental value of the effective thermal conductivity of the capillary structure is close to the theoretical value.…”

Section: Resultsmentioning

confidence: 52%

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Thermal Conductivity of Sintered Capillary Structures for Heat Pipes

Bartmeyer

Fachini

Krambeck

et al. 2020

BJD

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The heat pipes basically consist of a metal tube sealed with a capillary structure internally that is embedded with a working fluid. In heat pipes, the most important properties to be characterized are those related to pore structure and thermal conductivity, as they are responsible for capillary pumping and heat transfer, respectively. In this research, an experimental evaluation of the thermal conductivity of a sintered copper powder structure was performed, which can be used as a capillary structure in heat pipes. An experimental workbench based on the guarded-hot-plate principle was

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Section: Resultsmentioning

confidence: 52%

“…The volume-based average particle diameter was 33 μm. More details about the characterization of the copper powder can be obtained in [7].…”

Section: Copper Powdermentioning

confidence: 99%

Thermal Conductivity of Sintered Capillary Structures for Heat Pipes

Bartmeyer

Fachini

Krambeck

et al. 2020

BJD

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“…The result showed that the metallic powder was composed of 100% copper, so the purity is very high. According to the results of the SEM and the ED-XFR, the high purity and the shape are exactly the same as expected from the powder manufacturing method (Bartmeyer, Krambeck, Silva, Fusão, & Alves, 2018). For the determination of the average particle size, the Laser Diffraction Method was applied.…”

Section: Characteristics Of the Sintered Capillary Structuresmentioning

confidence: 56%

“…According to the distribution, the copper powder behavior is unimodal, which means that there is a size with more frequency. The unimodal distribution is excellent for application as the capillary structure of heat pipes (Bartmeyer et al, 2018). The copper powder was sintered in straight copper tubes ASTM B-75 Alloy 122 with an outer diameter of 9.45mm, an inner diameter of 7.75mm, and a length of 250mm.…”

Section: Characteristics Of the Sintered Capillary Structuresmentioning

confidence: 99%

Thickness Influence of the Copper Powder Sintered Capillary Structure in the Thermal Performance of Heat Pipes

et al. 2022

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A selection of capillary structure of sintered copper powder for heat pipes based on the experimental thermal performance was conducted. Due to the geometric characteristics, the manufactured heat pipes can be used in electronics cooling. The heat pipes are used to enhance the heat transfer and are based on phase change. The sintered metal powder structures have a high capillary pumping, low pores, and good thermal conductivity. The heat pipes were manufactured from a straight copper pipe with an external diameter of 9.45mm, an inner diameter of 7.75mm, and a length of 200mm. The capillary structure was made of sintered copper powder with three different thicknesses (2.125mm, 1.500mm, and 0.875mm). Distilled water was used as the working fluid. Each thickness was analyzed with four different filling ratios related to the evaporator volume: 60, 80, 100, and 120%. The condenser was cooled by forced convection of air, the adiabatic section was insulated, and the evaporator was heated by an electrical resistor and was insulated from the environment with aeronautic insulation. The heat pipes were tested horizontally under different low heat loads (from 5 up to 45W). The experimental results showed that all sintered heat pipes worked satisfactorily. However, Type #3 Heat Pipe with a filling ratio of 100% showed the best thermal performance.

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Characterization of a Copper Powder for Heat Pipe Wick Applications

Cited by 2 publications

References 2 publications

Thermal Conductivity of Sintered Capillary Structures for Heat Pipes

Thermal Conductivity of Sintered Capillary Structures for Heat Pipes

Thickness Influence of the Copper Powder Sintered Capillary Structure in the Thermal Performance of Heat Pipes

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