Evaluation of permeability of ceramic wick structures for two phase heat transfer devices

Berti, Lucas Freitas; Santos, Paulo Henrique Dias Dos; Bazzo, Edson; Janßen, Rolf; Hotza, Dachamir; Rambo, Carlos R.

doi:10.1016/j.applthermaleng.2010.12.001

Cited by 33 publications

(9 citation statements)

References 17 publications

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“…By adjusting the pulse input of the stepper motor, the flow rate of the liquid injected into the flow channel was controlled at 0.01 m/s, such that the liquid flow was in the Darcy flow state (Berti et al , 2011).…”

Section: Resultsmentioning

confidence: 99%

Performance characterisation and printing parameter modelling of selective laser melting printed capillary wicks

Tan

Ding

et al. 2022

RPJ

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Purpose The objective of this study is to investigate the feasibility of using selective laser melting (SLM) process to print fine capillary wick porous structures for heat pipe applications and clarify the interrelations between the printing parameters and the structure functional performance to form guidelines for design and printing preparation. Design/methodology/approach A new toolpath-based construction method is adopted to prepare the printing of capillary wick with fine pores in SLM process. This method uses physical melting toolpath profile with associated printing parameters to directly define slices and assemble them into a printing data model to ensure manufacturability and reduce precision loss of data model transformation in the printing preparation stage. The performance of the sample was characterised by a set of standard experiments and the relationship between the printing parameters and the structure performance is modeled. Findings The results show that SLM-printed capillary wick porous structures exhibit better performance in terms of pore diameter and related permeability than that of structures formed using traditional sintering methods, generally 15 times greater. The print hatching space and infilling pattern have a critical impact on functional porosity and permeability. An empirical formula was obtained to describe this impact and can serve as a reference for the design and printing of capillary wicks in future applications. Originality/value This research proves the feasibility of using SLM process to printing functional capillary wicks in extremely fine pores with improved functional performance. It is the first time to reveal the relations among the pore shapes, printing parameters and functional performance. The research results can be used as a reference for heat pipe design and printing in future industrial applications.

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Section: Resultsmentioning

confidence: 99%

Performance characterisation and printing parameter modelling of selective laser melting printed capillary wicks

Tan

Ding

et al. 2022

RPJ

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“…As has been known, the porous wick is an important component that drives the circulation for LHP [13,14]. In order to obtain the optimal property between the working liquid permeability and capillary force, effective wicks were put forward and investigated in both scientific and industrial fields [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the sintered wick of the anti-gravity loop-shaped heat pipe

Wang

Tang

Yuan

et al. 2015

Experimental Thermal and Fluid Science

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“…Another study stated that some local materials, such as coir fiber, produced a cooling efficiency of 89.6-92.8%, then fine fabric (47.22-85.51%), and coarse fabric (63.88-86.32%). [1][2][3][4][5] The pad material must be sufficiently porous to allow the free flow of air through it and must have a large enough wet surface area to produce saturated air. The study stated that Palash fiber had higher effectiveness of 26.31% and 13.2% than khus and aspen materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Permeability Characteristics of Bamboo Betung Activated Carbon as Alternative Pad Material for Direct Evaporative Cooling System

Putra¹,

Wijaksana²,

Surya³

2022

Nat Sci Eng Tech Jour

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The increased growth in the building sector, especially in big cities, has triggered an increase in the need for electrical energy for cooling systems, most of which use compressor-based cooling systems. Direct Evaporative Cooling (DEC) is evaporative that produces cooling by utilizing the latent heat of evaporation of water on the wet surface of the pad material. The pad material must be sufficiently porous to allow the free flow of air through it and must have a large enough wet surface area. This study used carbonized and activated bamboo Betung as a material for the DEC system. The research was conducted to obtain the permeability characteristics of the carbonized bamboo pad material at various temperatures of 400oC, 500oC 600oC, 700oC, and 800oC and then activated at a temperature of 600oC with a holding time of 60 minutes. Based on the results of the research on the permeability characteristics of bamboo Betung activated carbon material, which was carbonized at a temperature of 400oC and activated at a temperature of 600oC with a holding time of 60 minutes (ABR 400) had the highest permeability of 13.6 x 10-15 m2. Meanwhile, the lowest permeability was produced by bamboo Betung material which was carbonized at a temperature of 800oC and activated at an activation temperature of 600oC with a holding time of 60 minutes (ABR 800) which is only 0.56x10-15 m2.

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Evaluation of permeability of ceramic wick structures for two phase heat transfer devices

Cited by 33 publications

References 17 publications

Performance characterisation and printing parameter modelling of selective laser melting printed capillary wicks

Performance characterisation and printing parameter modelling of selective laser melting printed capillary wicks

Experimental investigation on the sintered wick of the anti-gravity loop-shaped heat pipe

Experimental Study of Permeability Characteristics of Bamboo Betung Activated Carbon as Alternative Pad Material for Direct Evaporative Cooling System

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