Thermal characterisation of micro flat aluminium heat pipe arrays by varying working fluid and inclination angle

Guanghan Huang; Yong Tang; Pengtao Wang; Longsheng Lu; Wei Yuan

doi:10.3390/app8071052

Thermal characterisation of micro flat aluminium heat pipe arrays by varying working fluid and inclination angle

Guanghan Huang, Yong Tang, Pengtao Wang, Longsheng Lu, Wei Yuan

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

A micro heat pipe array is desirable owing to its high heat transfer capacity, compact size, and high surface-volume ratio compared with conventional heat pipes. In this study, micro flat aluminium heat pipe arrays (MF-AHPA) were developed and systematically characterised by varying working fluid and inclination angle. Three MF-AHPAs with different working fluids, i.e., acetone, cyclopentane, and n-hexane, were fabricated. The acetone MF-AHPA achieved the best thermal performance. The underlying mechanism is the small flow viscous friction and small shearing force of liquid vapour. Additionally, the experimental results show a strong dependence of MF-AHPAs' thermal resistance on the orientation due to the gravitational effect on axial liquid distribution. Finally, a criterion is proposed to determine the optimal inclination angle of the MF-AHPA. In the present study, a volumetric fraction (α_{a, c}) of 74 ± 7% has been shown to well predict an optimal inclination angle of the MF-AHPAs with various working fluids and heat loads.

Original language	English
Article number	1052
Journal	Applied Sciences (Switzerland)
Volume	8
Issue number	7
DOIs	https://doi.org/10.3390/app8071052
State	Published - Jun 28 2018
Externally published	Yes

Funding

The authors are also grateful for the China Scholarship Council and Dr Chen Li for the language editing of paper work. The project was financially supported by the National Natural Science Foundation of China (No. 51735004), Science and Technology Planning Project for Industry-University-Research Cooperation in Guangdong Province (Grant No. 2014B090901065) and Team Program (No. 2014A030312017) supported by the Natural Science Foundation of Guangdong Province. This work is also partially supported by United States NSF award (No. 1357920).

Funders	Funder number
Directorate for Engineering	1357920
National Natural Science Foundation of China	51735004

Keywords

Aluminiummicro heat pipe
Liquid film distribution
Optimal inclination angle
Working fluid

Access to Document

10.3390/app8071052

Cite this

@article{1892b22e33b14c30a62a0cf05d0c87dc,

title = "Thermal characterisation of micro flat aluminium heat pipe arrays by varying working fluid and inclination angle",

abstract = "A micro heat pipe array is desirable owing to its high heat transfer capacity, compact size, and high surface-volume ratio compared with conventional heat pipes. In this study, micro flat aluminium heat pipe arrays (MF-AHPA) were developed and systematically characterised by varying working fluid and inclination angle. Three MF-AHPAs with different working fluids, i.e., acetone, cyclopentane, and n-hexane, were fabricated. The acetone MF-AHPA achieved the best thermal performance. The underlying mechanism is the small flow viscous friction and small shearing force of liquid vapour. Additionally, the experimental results show a strong dependence of MF-AHPAs' thermal resistance on the orientation due to the gravitational effect on axial liquid distribution. Finally, a criterion is proposed to determine the optimal inclination angle of the MF-AHPA. In the present study, a volumetric fraction (αa, c) of 74 ± 7% has been shown to well predict an optimal inclination angle of the MF-AHPAs with various working fluids and heat loads.",

keywords = "Aluminiummicro heat pipe, Liquid film distribution, Optimal inclination angle, Working fluid",

author = "Guanghan Huang and Yong Tang and Pengtao Wang and Longsheng Lu and Wei Yuan",

note = "Publisher Copyright: {\textcopyright} 2018 by the authors.",

year = "2018",

month = jun,

day = "28",

doi = "10.3390/app8071052",

language = "English",

volume = "8",

journal = "Applied Sciences (Switzerland)",

issn = "2076-3417",

publisher = "MDPI",

number = "7",

}

TY - JOUR

T1 - Thermal characterisation of micro flat aluminium heat pipe arrays by varying working fluid and inclination angle

AU - Huang, Guanghan

AU - Tang, Yong

AU - Wang, Pengtao

AU - Lu, Longsheng

AU - Yuan, Wei

PY - 2018/6/28

Y1 - 2018/6/28

N2 - A micro heat pipe array is desirable owing to its high heat transfer capacity, compact size, and high surface-volume ratio compared with conventional heat pipes. In this study, micro flat aluminium heat pipe arrays (MF-AHPA) were developed and systematically characterised by varying working fluid and inclination angle. Three MF-AHPAs with different working fluids, i.e., acetone, cyclopentane, and n-hexane, were fabricated. The acetone MF-AHPA achieved the best thermal performance. The underlying mechanism is the small flow viscous friction and small shearing force of liquid vapour. Additionally, the experimental results show a strong dependence of MF-AHPAs' thermal resistance on the orientation due to the gravitational effect on axial liquid distribution. Finally, a criterion is proposed to determine the optimal inclination angle of the MF-AHPA. In the present study, a volumetric fraction (αa, c) of 74 ± 7% has been shown to well predict an optimal inclination angle of the MF-AHPAs with various working fluids and heat loads.

AB - A micro heat pipe array is desirable owing to its high heat transfer capacity, compact size, and high surface-volume ratio compared with conventional heat pipes. In this study, micro flat aluminium heat pipe arrays (MF-AHPA) were developed and systematically characterised by varying working fluid and inclination angle. Three MF-AHPAs with different working fluids, i.e., acetone, cyclopentane, and n-hexane, were fabricated. The acetone MF-AHPA achieved the best thermal performance. The underlying mechanism is the small flow viscous friction and small shearing force of liquid vapour. Additionally, the experimental results show a strong dependence of MF-AHPAs' thermal resistance on the orientation due to the gravitational effect on axial liquid distribution. Finally, a criterion is proposed to determine the optimal inclination angle of the MF-AHPA. In the present study, a volumetric fraction (αa, c) of 74 ± 7% has been shown to well predict an optimal inclination angle of the MF-AHPAs with various working fluids and heat loads.

KW - Aluminiummicro heat pipe

KW - Liquid film distribution

KW - Optimal inclination angle

KW - Working fluid

UR - http://www.scopus.com/inward/record.url?scp=85049258161&partnerID=8YFLogxK

U2 - 10.3390/app8071052

DO - 10.3390/app8071052

M3 - Article

AN - SCOPUS:85049258161

SN - 2076-3417

VL - 8

JO - Applied Sciences (Switzerland)

JF - Applied Sciences (Switzerland)

IS - 7

M1 - 1052

ER -

Thermal characterisation of micro flat aluminium heat pipe arrays by varying working fluid and inclination angle

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this