Experimental Study on the Heat Transfer Performance of a Gallium Heat Sink
Document Type
Article
Publication Date
4-27-2020
Publication Title
Energy Conversion and Management
Volume
213
First page number:
1
Last page number:
8
Abstract
Phase change thermal storage technology has received considerable attention in the thermal management of electronic devices. Unfortunately, the efficiency using paraffin is too low to meet the heat dissipation requirements of high power devices. In this work, gallium is selected as the phase change material, and the melting mechanism of gallium heat sink in spatial distributions is examined by experiment. Results show that the heat transfer efficiency of regions in the Y-cross section near the heating surface and in the X-cross section near the upper surface of the gallium heat sink are better than other regions. The average effective thermal conductivity of the gallium heat sink reaches 71.97 W/(m·K). The natural convection promotes the overall melting rate, but it results in the inefficient heat transfer in the middle melting stage and worse heat transfer in the later melting stage. Compared with the copper foam/paraffin composite heat sink in the same size, the overall and most of melting time of the gallium heat sink is reduced by 55.5% and 56.0%, respectively. At the same thermal storage capacity, the volume and weight of the gallium heat sink are reduced by 67% and 18%, respectively, compared with the copper foam/paraffin composite heat sink.
Keywords
Gallium; Copper foam; Paraffin; Phase change; Heat sink
Disciplines
Heat Transfer, Combustion
Language
English
Repository Citation
Xu, Z.,
Li, X.,
Wang, Q.,
Chen, Y.,
Ma, T.
(2020).
Experimental Study on the Heat Transfer Performance of a Gallium Heat Sink.
Energy Conversion and Management, 213
1-8.
http://dx.doi.org/10.1016/j.enconman.2020.112853