Thermal performance of ultra-thin flattened heat pipes
This study investigates the thermal performance of composite ultra-thin heat pipes (UTHPs). UTHPs are fabricated by flattening cylindrical heat pipes with outer diameter of 2 mm. The thickness and width were 0.8 mm and 2.7 mm, respectively. The composite wick structure is made of sintered copper foa...
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| Format: | Article |
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/40906/ |
| _version_ | 1848796160115867648 |
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| author | Zhou, Wenjie Xie, Peida Li, Yong Yan, Yuying Li, Bo |
| author_facet | Zhou, Wenjie Xie, Peida Li, Yong Yan, Yuying Li, Bo |
| author_sort | Zhou, Wenjie |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This study investigates the thermal performance of composite ultra-thin heat pipes (UTHPs). UTHPs are fabricated by flattening cylindrical heat pipes with outer diameter of 2 mm. The thickness and width were 0.8 mm and 2.7 mm, respectively. The composite wick structure is made of sintered copper foam-mesh wick (CFMW). CFMW combines the good heat transfer performance of copper foam and the high mechanical strength of mesh. The manufacturing process of UTHP was studied and the thermal performance of UTHP samples were investigated experimentally. The results indicate that the optimum filling ratio of UTHPs is 100% and the maximum temperature difference is 3.7 °C under the maximum heat transport capacity of 5 W. The thermal resistances of UTHPs increase gradually with the heat power before drying out. Too low or too high filling ratios will reduce the heat transfer efficiency of UTHPs by increasing the thermal resistances. With the optimum filling ratio of 100%, the evaporation thermal resistance of UTHP is found to be 0.29 K/W and the condensation thermal resistance is 0.45 K/W at the heat load of 5 W. |
| first_indexed | 2025-11-14T19:43:34Z |
| format | Article |
| id | nottingham-40906 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:43:34Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-409062020-05-04T18:44:55Z https://eprints.nottingham.ac.uk/40906/ Thermal performance of ultra-thin flattened heat pipes Zhou, Wenjie Xie, Peida Li, Yong Yan, Yuying Li, Bo This study investigates the thermal performance of composite ultra-thin heat pipes (UTHPs). UTHPs are fabricated by flattening cylindrical heat pipes with outer diameter of 2 mm. The thickness and width were 0.8 mm and 2.7 mm, respectively. The composite wick structure is made of sintered copper foam-mesh wick (CFMW). CFMW combines the good heat transfer performance of copper foam and the high mechanical strength of mesh. The manufacturing process of UTHP was studied and the thermal performance of UTHP samples were investigated experimentally. The results indicate that the optimum filling ratio of UTHPs is 100% and the maximum temperature difference is 3.7 °C under the maximum heat transport capacity of 5 W. The thermal resistances of UTHPs increase gradually with the heat power before drying out. Too low or too high filling ratios will reduce the heat transfer efficiency of UTHPs by increasing the thermal resistances. With the optimum filling ratio of 100%, the evaporation thermal resistance of UTHP is found to be 0.29 K/W and the condensation thermal resistance is 0.45 K/W at the heat load of 5 W. Elsevier 2017-05-05 Article PeerReviewed Zhou, Wenjie, Xie, Peida, Li, Yong, Yan, Yuying and Li, Bo (2017) Thermal performance of ultra-thin flattened heat pipes. Applied Thermal Engineering, 117 . pp. 773-781. ISSN 1873-5606 (In Press) Ultra-thin heat pipe; Composite wick; Filling ratio; Thermal performance http://www.sciencedirect.com/science/article/pii/S1359431117305446 doi:10.1016/j.applthermaleng.2017.01.089 doi:10.1016/j.applthermaleng.2017.01.089 |
| spellingShingle | Ultra-thin heat pipe; Composite wick; Filling ratio; Thermal performance Zhou, Wenjie Xie, Peida Li, Yong Yan, Yuying Li, Bo Thermal performance of ultra-thin flattened heat pipes |
| title | Thermal performance of ultra-thin flattened heat pipes |
| title_full | Thermal performance of ultra-thin flattened heat pipes |
| title_fullStr | Thermal performance of ultra-thin flattened heat pipes |
| title_full_unstemmed | Thermal performance of ultra-thin flattened heat pipes |
| title_short | Thermal performance of ultra-thin flattened heat pipes |
| title_sort | thermal performance of ultra-thin flattened heat pipes |
| topic | Ultra-thin heat pipe; Composite wick; Filling ratio; Thermal performance |
| url | https://eprints.nottingham.ac.uk/40906/ https://eprints.nottingham.ac.uk/40906/ https://eprints.nottingham.ac.uk/40906/ |