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Research Papers: Micro/Nanoscale Heat Transfer

The Experimental Exploration of Embedding Phase Change Materials With Graphite Nanofibers for the Thermal Management of Electronics

[+] Author and Article Information
Randy D. Weinstein1

Center for Advanced Communications, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085randy.weinstein@villanova.edu

Thomas C. Kopec

Center for Advanced Communications, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085thomas.kopec@villanova.edu

Amy S. Fleischer

Center for Advanced Communications, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085amy.fleischer@villanova.edu

Elizabeth D’Addio

Center for Advanced Communications, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085elizabeth.daddio@villanova.edu

Carol A. Bessel

Center for Advanced Communications, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085carol.bessel@villanova.edu

1

Corresponding author.

J. Heat Transfer 130(4), 042405 (Mar 18, 2008) (8 pages) doi:10.1115/1.2818764 History: Received October 10, 2006; Revised May 01, 2007; Published March 18, 2008

To improve the thermal performance of phase change materials (PCMs), graphite nanofibers were embedded into a paraffin PCM. The thermal effects of graphite fiber loading levels (05wt%) and graphite fiber type (herringbone, ribbon, or platelet) during the melting process were examined for a 131cm3 volume system with power loads between 3W and 7W(11602710Wm2). It was found that the maximum system temperature decreased as graphite fiber loading levels increased and that the results were fiber-structure dependent.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Styles of graphite nanofibers (a) ribbon, (b) platelet, and (c) herringbone (25)

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Figure 2

PCM module illustrating thermocouple hole spacing. The spacing is in centimeters.

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Figure 5

Transient thermal response of 0.25% platelet GNF∕PCM mixture with 7W applied power

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Figure 6

Transient thermal response of 0.25% ribbon GNF∕PCM mixture with 7W applied power

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Figure 7

Transient response of the bottom thermocouple for the 0.25% PCM∕GNF module with 7W applied power compared to the pure PCM module

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Figure 8

Transient response of the top thermocouple for the 0.25% PCM∕GNF module with 7W applied power compared to the pure PCM module

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Figure 9

Transient response of the bottom thermocouple for the 0.25% PCM∕GNF module with 3W applied power compared to the pure PCM module

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Figure 10

Transient response of the bottom thermocouple for the 0.5% PCM∕GNF module with 7W applied power compared to the pure PCM module

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Figure 11

Transient response of the top thermocouple for the 0.5% PCM∕GNF module with 7W applied power

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Figure 12

Transient response of the bottom thermocouple for the 1.0% GNF∕PCM module with 7W applied power

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Figure 13

Transient response of the top thermocouple for the 1.0% GNF∕PCM module with 7W applied power

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Figure 14

Transient response of the bottom thermocouple for the 5.0% PCM∕GNF module with 7W applied power

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Figure 3

Transient thermal response of pure paraffin PCM module with 7W applied power

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Figure 16

Transient response of the pure PCM and a 3.75% herringbone GNF∕PCM mixture with 7W applied power

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Figure 15

Transient response of the top thermocouple for the 5.0% PCM∕GNF module with 7W applied power

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Figure 4

Transient thermal response of 0.25% herringbone GNF∕PCM mixture with 7W applied power

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