Fabrication and thermal performance of a novel roll-bond flat thermosyphon

Deng, Liqiang; Li, Yong; Xu, Peiken; Chen, Zhaoshu; Zhou, Wenjie; Li, Bo

Abstract

In this work, a novel wickless heat pipe fabricated using the roll-bond process and called the roll-bond flat thermosyphon was proposed for electronic component cooling due to its slim and large-size configuration, low-cost, and mass-production capable. The thermal performance of roll-bond flat thermosyphon was investigated through the tests in terms of 3 typical structures (stagger, cross and align) and 4 filling ratios (5%, 10%, 20%, and 40%) under the increasing heat power, and evaluated with the effective thermal conductivity and the maximum heat transfer capacity. The phenomena of boiling regime evolution, geyser effect, liquid entrainment and dry-out, can be found through the temperature responses in the cases of progressive filling ratios and heating powers. The cross-structured sample was found to behave the worst among the three structures due to its blocked up-flowing inflated circuits. The highest effectivity thermal conductivity of 22404 (W/K·m) was found in the 5%-align sample, however, accompanied with early dry-out. The heat transfer capability is positive correlated to the filling ratio, and maximum heat transfer capacity of 100 W (heat flux of 14.9 (kW/m2)) was recorded in the stagger-40% sample. The 20%-stagger sample is recommended as the optimum design, due to its more stable and relative high thermal conductivity, which is peaked to 16019 (W/K·m), and averaged at 12616 (W/K·m) in the range of 0–90 W.

Citation

Deng, L., Li, Y., Xu, P., Chen, Z., Zhou, W., & Li, B. (2020). Fabrication and thermal performance of a novel roll-bond flat thermosyphon. Applied Thermal Engineering, 181, 1434-1447. https://doi.org/10.1016/j.applthermaleng.2020.115959

• Journal Article Type: Article
• Acceptance Date: Aug 22, 2020
• Online Publication Date: Aug 27, 2020
• Publication Date: Nov 25, 2020
• Deposit Date: Sep 10, 2020
• Journal: Applied Thermal Engineering
• Print ISSN: 1359-4311
• Peer Reviewed: Peer Reviewed
• Volume: 181
• Article Number: 115959
• Pages: 1434-1447
• DOI: https://doi.org/10.1016/j.applthermaleng.2020.115959
• Keywords: Industrial and Manufacturing Engineering; Energy Engineering and Power Technology
• Public URL: https://nottingham-repository.worktribe.com/output/4894662
• Publisher URL: https://www.sciencedirect.com/science/article/abs/pii/S1359431120334414
• Additional Information: This article is maintained by: Elsevier; Article Title: Fabrication and thermal performance of a novel roll-bond flat thermosyphon; Journal Title: Applied Thermal Engineering; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.applthermaleng.2020.115959; Content Type: article; Copyright: © 2020 Published by Elsevier Ltd.