Thermal performance of ultra-thin flattened heat pipes with composite wick structure
This study proposes three composite wick structures (copper power or mesh sintered on grooved tube), namely, single arch-shaped sintered–grooved wick (SSGW), bilateral arch-shaped sintered–grooved wick (BSGW), and mesh–grooved wick (MGW), to improve the thermal performance of ultra-thin heat pipes (...
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| Format: | Article |
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/44130/ |
| _version_ | 1848796845606699008 |
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| author | Li, Yong Zhou, Wenjie He, Jiabin Yan, Yuying Li, Bo Zeng, Zhixin |
| author_facet | Li, Yong Zhou, Wenjie He, Jiabin Yan, Yuying Li, Bo Zeng, Zhixin |
| author_sort | Li, Yong |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This study proposes three composite wick structures (copper power or mesh sintered on grooved tube), namely, single arch-shaped sintered–grooved wick (SSGW), bilateral arch-shaped sintered–grooved wick (BSGW), and mesh–grooved wick (MGW), to improve the thermal performance of ultra-thin heat pipes (UTHPs). Phase-change flattening technology is employed to fabricate UTHPs. The morphologies of the wick structures after flattening are observed. An experimental apparatus is setup to investigate the thermal performance of UTHP samples under incremental heat loads. The heat transfer limits of UTHP are theoretically and experimentally analyzed. Capillary limit is found to be the main heat transfer limit, and the theoretical values of the samples with SSGW and BSGW are in good agreement with the experimental results. Results indicate that the maximum heat transport capacities are 12 W, 13 W and 14 W, under the corresponding optimum filling ratios of 70%, 70%, and 80%, for the SSGW, BSGW and MGW UTHPs, respectively. Evaporation and condensation thermal resistances of UTHP samples increase with the increase in the filling ratio before the occurrence of dry-out. UTHPs with SSGW have the least evaporation thermal resistance whereas UTHPs with MGW have the least condensation thermal resistance. |
| first_indexed | 2025-11-14T19:54:27Z |
| format | Article |
| id | nottingham-44130 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:54:27Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-441302020-05-04T17:57:38Z https://eprints.nottingham.ac.uk/44130/ Thermal performance of ultra-thin flattened heat pipes with composite wick structure Li, Yong Zhou, Wenjie He, Jiabin Yan, Yuying Li, Bo Zeng, Zhixin This study proposes three composite wick structures (copper power or mesh sintered on grooved tube), namely, single arch-shaped sintered–grooved wick (SSGW), bilateral arch-shaped sintered–grooved wick (BSGW), and mesh–grooved wick (MGW), to improve the thermal performance of ultra-thin heat pipes (UTHPs). Phase-change flattening technology is employed to fabricate UTHPs. The morphologies of the wick structures after flattening are observed. An experimental apparatus is setup to investigate the thermal performance of UTHP samples under incremental heat loads. The heat transfer limits of UTHP are theoretically and experimentally analyzed. Capillary limit is found to be the main heat transfer limit, and the theoretical values of the samples with SSGW and BSGW are in good agreement with the experimental results. Results indicate that the maximum heat transport capacities are 12 W, 13 W and 14 W, under the corresponding optimum filling ratios of 70%, 70%, and 80%, for the SSGW, BSGW and MGW UTHPs, respectively. Evaporation and condensation thermal resistances of UTHP samples increase with the increase in the filling ratio before the occurrence of dry-out. UTHPs with SSGW have the least evaporation thermal resistance whereas UTHPs with MGW have the least condensation thermal resistance. Elsevier 2016-06-05 Article PeerReviewed Li, Yong, Zhou, Wenjie, He, Jiabin, Yan, Yuying, Li, Bo and Zeng, Zhixin (2016) Thermal performance of ultra-thin flattened heat pipes with composite wick structure. Applied Thermal Engineering, 102 . pp. 487-499. ISSN 1873-5606 Ultra-thin heat pipe; Composite wick; Flattening; Thermal performance http://www.sciencedirect.com/science/article/pii/S135943111630401X?via%3Dihub doi:10.1016/j.applthermaleng.2016.03.097 doi:10.1016/j.applthermaleng.2016.03.097 |
| spellingShingle | Ultra-thin heat pipe; Composite wick; Flattening; Thermal performance Li, Yong Zhou, Wenjie He, Jiabin Yan, Yuying Li, Bo Zeng, Zhixin Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title | Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title_full | Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title_fullStr | Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title_full_unstemmed | Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title_short | Thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| title_sort | thermal performance of ultra-thin flattened heat pipes with composite wick structure |
| topic | Ultra-thin heat pipe; Composite wick; Flattening; Thermal performance |
| url | https://eprints.nottingham.ac.uk/44130/ https://eprints.nottingham.ac.uk/44130/ https://eprints.nottingham.ac.uk/44130/ |