Capillary performance analysis of copper powder-fiber composite wick for ultra-thin heat pipe
| Autor: | Junyi Niu, Ning Xie, Zhengguo Zhang, Xuenong Gao, Yutang Fang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Capillary action 020209 energy Composite number technology industry and agriculture Sintering chemistry.chemical_element 02 engineering and technology Condensed Matter Physics Copper Heat pipe 020401 chemical engineering Surface-area-to-volume ratio chemistry Permeability (electromagnetism) 0202 electrical engineering electronic engineering information engineering Particle size 0204 chemical engineering Composite material |
| Zdroj: | Heat and Mass Transfer. 57:949-960 |
| ISSN: | 1432-1181 0947-7411 |
| DOI: | 10.1007/s00231-020-02989-5 |
| Popis: | Excellent ultra-thin heat pipes (UTHP) require a wick with high capillary force (ΔPc) and a good permeability performance (K). In this work, a copper powder-fiber composite wick was fabricated by sintering of the copper powder and fiber mixture. Effects of the copper powder particle size, copper powder volume ratio, as well as the super-hydrophilic treatment were investigated, and the results indicate that the copper powder volume ratio is the most significant factor by orthogonal experiments. Moreover, sensitivity analysis shows that super-hydrophilic treatment contributes the lower capillary force and higher permeability, except when copper powder particle size is high to 80 mesh and powder ratio is low to 20%. Interestingly, the overall capillary performance (ΔPc·K) of the super-hydrophilic treated wicks is significantly improved. Besides, for the super-hydrophilic treated wicks, both the smaller copper powder particle size and volume ratio contribute the higher permeability and better comprehensive performance, even though a worse capillary force. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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