3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs

Abstract As the electronic technology becomes increasingly integrated and miniaturized, thermal management has become a major challenge for electronic device applications. A heat pipe is a highly efficient two-phase heat transfer device. Due to its simple structure, high thermal conductivity and goo...

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Autores principales:	Chao Chang, Zhaoyang Han, Xiaoyu He, Zongyu Wang, Yulong Ji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/162702ea85c94fda82d01b9fa80eee4b
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spelling	oai:doaj.org-article:162702ea85c94fda82d01b9fa80eee4b2021-12-02T14:27:53Z3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs10.1038/s41598-021-87798-42045-2322https://doaj.org/article/162702ea85c94fda82d01b9fa80eee4b2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87798-4https://doaj.org/toc/2045-2322Abstract As the electronic technology becomes increasingly integrated and miniaturized, thermal management has become a major challenge for electronic device applications. A heat pipe is a highly efficient two-phase heat transfer device. Due to its simple structure, high thermal conductivity and good temperature uniformity, it has been used in many different industrial fields. A novel aluminum flat heat pipe, with micro-grooves, has in the present work been designed and fabricated by using a 3D printing technology. Aluminum powder was used as a raw material, which was selectively melted and solidified to form the shape of the heat pipe. The sintered aluminum powder increased the roughness of the inner surface of the heat pipe, and the designed micro-grooves further enhanced the capillary forces induced by the wick structure. The wettability, for the working fluid (acetone), was excellent and the capillary forces were sufficient for the working fluid to flow back in the pipe. The effects of working fluid filling ratio, on the heat transfer performance of the heat pipe, was also investigated. It was shown that a filling ratio of 10% gave the best heat transfer performance with the lowest thermal resistance. The 3D-printed flat heat pipe was, therefore, also tested for the thermal management of a LED. The temperature of the LED could be kept within 40 °C and its service life became prolonged.Chao ChangZhaoyang HanXiaoyu HeZongyu WangYulong JiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chao Chang Zhaoyang Han Xiaoyu He Zongyu Wang Yulong Ji 3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
description	Abstract As the electronic technology becomes increasingly integrated and miniaturized, thermal management has become a major challenge for electronic device applications. A heat pipe is a highly efficient two-phase heat transfer device. Due to its simple structure, high thermal conductivity and good temperature uniformity, it has been used in many different industrial fields. A novel aluminum flat heat pipe, with micro-grooves, has in the present work been designed and fabricated by using a 3D printing technology. Aluminum powder was used as a raw material, which was selectively melted and solidified to form the shape of the heat pipe. The sintered aluminum powder increased the roughness of the inner surface of the heat pipe, and the designed micro-grooves further enhanced the capillary forces induced by the wick structure. The wettability, for the working fluid (acetone), was excellent and the capillary forces were sufficient for the working fluid to flow back in the pipe. The effects of working fluid filling ratio, on the heat transfer performance of the heat pipe, was also investigated. It was shown that a filling ratio of 10% gave the best heat transfer performance with the lowest thermal resistance. The 3D-printed flat heat pipe was, therefore, also tested for the thermal management of a LED. The temperature of the LED could be kept within 40 °C and its service life became prolonged.
format	article
author	Chao Chang Zhaoyang Han Xiaoyu He Zongyu Wang Yulong Ji
author_facet	Chao Chang Zhaoyang Han Xiaoyu He Zongyu Wang Yulong Ji
author_sort	Chao Chang
title	3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
title_short	3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
title_full	3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
title_fullStr	3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
title_full_unstemmed	3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs
title_sort	3d printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power leds
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/162702ea85c94fda82d01b9fa80eee4b
work_keys_str_mv	AT chaochang 3dprintedaluminumflatheatpipeswithmicrogroovesforefficientthermalmanagementofhighpowerleds AT zhaoyanghan 3dprintedaluminumflatheatpipeswithmicrogroovesforefficientthermalmanagementofhighpowerleds AT xiaoyuhe 3dprintedaluminumflatheatpipeswithmicrogroovesforefficientthermalmanagementofhighpowerleds AT zongyuwang 3dprintedaluminumflatheatpipeswithmicrogroovesforefficientthermalmanagementofhighpowerleds AT yulongji 3dprintedaluminumflatheatpipeswithmicrogroovesforefficientthermalmanagementofhighpowerleds
_version_	1718391235900604416

3D printed aluminum flat heat pipes with micro grooves for efficient thermal management of high power LEDs

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