Natural Graphite Sheet Heat Sinks with Embedded Heat Pipes

Resource type
Date created
2020-04-20
Authors/Contributors
Author: Faur, Xavier
Author: Saket, Ali
Abstract
Natural graphite sheet (NGS) is a candidate material for lightweight, high-performance heat sinks. We show that the low through–plane thermal conductivity can be mitigated by using heat pipes. In the measured configuration, the thermal resistance of an NGS heat sink with embedded heat pipes is comparable to that of a geometrically-identical aluminum one. The achieved weight reduction is 37 %. When electrical insulation of a heat sink is not required, soft and conforming NGS does not require thermal grease at the interface between the heat source and the heat sink. The low electrical conductivity of NGS does not lead to a decrease in common mode conducted emissions, but the potential to reduce the radiated emissions was quantified to be 12 to 97 % based on an analogy with antennas. In practical applications, replacing an existing heat sink with a geometrically identical NGS one is not recommended because it limits the achievable improvements in thermal performance, weight, and cost. Instead, we suggest using an optimization algorithm to determine the optimal heat sink geometry.
Document
Published as
M. Cermak, X. Faure, A. Saket, M. Bahrami and M. Ordonez, "Natural graphite sheet heat sinks with embedded heat pipes," in IEEE Access, DOI: 10.1109/ACCESS.2020.2988832.
Publication title
IEEE Access
Document title
Natural Graphite Sheet Heat Sinks with Embedded Heat Pipes
Publisher DOI
10.1109/ACCESS.2020.2988832
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
Member of collection
Attachment Size
09072112.pdf 6.82 MB