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Heat transfer coefficient of porous copper with homogeneous and hybrid structures in active cooling

Published online by Cambridge University Press:  29 July 2013

Zhu Xiao  and
Yuyuan Zhao
Zhu Xiao*
Affiliation:
School of Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom; andSchool of Materials Science and Engineering, Central South University, Changsha 410083, China
Yuyuan Zhao*
Affiliation:
School of Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
*
a)Address all correspondence to this author. e-mail: y.y.zhao@liv.ac.uk
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Abstract

Heat transfer coefficients of porous copper samples with single- and double-layer structures, fabricated by the lost carbonate sintering process, were measured under forced convection conditions using water as the coolant. Compared with the empty channel, introducing a porous copper sample enhanced the heat transfer coefficient 5–8 times. The porous copper samples with double layers of porosities of 60% and 80% often had lower heat transfer coefficients than their single layer counterparts with the same overall porosities because the coolant flowed predominantly through the high-porosity layer. For the same double-layer structure, the order of the double layer had a large effect on the heat transfer coefficient. Placing the high-porosity layer next to the heat source was more efficient than the other way around. The predictions of a segment model developed for the heat transfer coefficient of multilayer structures agreed well with the experimental results.

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Articles
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Journal of Materials Research , Volume 28 , Issue 17: Focus Issue: Advances in the Synthesis, Characterization, and Properties of Bulk Porous Materials , 14 September 2013 , pp. 2545 - 2553
Copyright
Copyright © Materials Research Society 2013 

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References

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