Thermal Performances Investigation of Anti-Gravity Heat Pipe with Tapering Phase-Change Chamber

Jianhua Xiang, Xi-bo Chen, Jiale Huang, Chunliang Zhang, Chao Zhou and Haoxing Zheng
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Jianhua Xiang: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Xi-bo Chen: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Jiale Huang: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Chunliang Zhang: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Chao Zhou: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Haoxing Zheng: School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China

Energies, 2020, vol. 13, issue 19, 1-10

Abstract: The objective of this study was to fabricate anti-gravity heat pipes with a tapering column phase-change chamber and changeable cross-sectional wick structure. The thermal performances of the anti-gravity heat pipes were experimentally investigated. Results show that the thermal resistances of the different heat pipes are less than 0.03 °C/W, except for the sharp conical chamber heat pipe under anti-gravity heating conditions (0.121 °C/W). Start-up times of different types of heat pipes are similar and the temperatures are steady within 3 to 5 min. The heat transfer ability of a conical chamber is always better than that of a cylindrical one. The performance of the sharp conical chamber heat pipe is the best under gravity assistance heating conditions. Contrarily, the blunt conical chamber heat pipe has the best heat transfer ability under anti-gravity heating conditions. Moreover, the heat transfer capability of the blunt conical chamber heat pipe is unaffected by the relative position of the heat and cold sources, which is suitable for constant temperature cooling applications with frequent switching of the heat and cold sources.

Keywords: anti-gravity heat pipe; tapering column phase-change chamber; changeable cross-sectional wick structure; thermal performances (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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