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

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


Liqiang Deng

Yong Li

Peiken Xu

Zhaoshu Chen

Wenjie Zhou

Bo Li


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.


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.

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
Keywords Industrial and Manufacturing Engineering; Energy Engineering and Power Technology
Public URL
Publisher URL
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:; Content Type: article; Copyright: © 2020 Published by Elsevier Ltd.

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