Non-Uniform Three-Dimensional Pulsating Heat Pipe for Anti-Gravity High-Flux Applications

Chih-Yung Tseng, Kai-Shing Yang and Chi-Chuan Wang
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Chih-Yung Tseng: Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Hsinchu 310, Taiwan
Kai-Shing Yang: Deparment of Refrigeration, Air Conditioning and Energy Engineering, Faculty of Engineering, National Chin-Yi University of Technology, 51, Sec. 2, Chung-Shan Rd., Taichung 411, Taiwan
Chi-Chuan Wang: Department of Mechanical Engineering, Faculty of Engineering, National Chiao Tung University, EE474, 1001 University Rd., Hsinchu 300, Taiwan

Energies, 2020, vol. 13, issue 12, 1-16

Abstract: This study proposes a novel high-flux pulsating heat pipe that can lift the major constraint of the conventional pulsating heat pipe (PHP) which is unable to function properly upon anti-gravity operations. The proposed PHP introduces additional unbalance force via uneven tube diameter/geometry in the adiabatic sections to tailor the problem in anti-gravity operation. The design contains a three-dimensional configuration circuitry with compact arrangement tubes on the evaporator and condenser. Through this design, the non-uniform three-dimensional pulsating heat pipe (3D-PHP) manipulates the uneven inner diameters of the adiabatic sections to form uneven vapor/liquid distributions in the adiabatic sections to yield a unitary flow pattern that is able to withstand a much higher input power. The present PHP uses methanol as working fluid, with 38% volumetric filling ratio, and has a high-flux of 22.9 W/cm 2 and a low the thermal resistance ratio ( R anti-gravity / R gravity-assisted ) of 1.05 when the input power is 800 W. Both the heat flux and thermal resistance ratio for the proposed design are far better than the existing literature.

Keywords: pulsating heat pipe; anti-gravity; compact arrangement; thermal resistance ratio (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 references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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