An Experimental Investigation of Heat Transport Capability in a Nanofluid Oscillating Heat Pipe

[+] Author and Article Information
H. B. Ma

 University of Missouri – Columbia, Columbia, MO 65211mah@missouri.edu

C. Wilson, Q. Yu, K. Park

 University of Missouri – Columbia, Columbia, MO 65211

U. S. Choi

 Argonne National Laboratory, Argonne, IL 60439

Murli Tirumala

 Intel Corporation, Hillsboro, OR 97124

J. Heat Transfer 128(11), 1213-1216 (May 23, 2006) (4 pages) doi:10.1115/1.2352789 History: Received March 03, 2006; Revised May 23, 2006

An experimental investigation of a nanofluid oscillating heat pipe (OHP) was conducted to determine the nanofluid effect on the heat transport capability in an OHP. The nanofluid consisted of HPLC grade water and 1.0vol% diamond nanoparticles of 550nm. These diamond nanoparticles settle down in the motionless base fluid. However, the oscillating motion of the OHP suspends the diamond nanoparticles in the working fluid. Experimental results show that the heat transport capability of the OHP significantly increased when it was charged with the nanofluid at a filling ratio of 50%. It was found that the heat transport capability of the OHP depends on the operating temperature. The investigated OHP could reach a thermal resistance of 0.03°CW at a heat input of 336W. The nanofluid OHP investigated here provides a new approach in designing a highly efficient next generation of heat pipe cooling devices.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Oscillating heat pipe (a) dimensions and thermocouple locations (mm), (b) picture

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Figure 2

The sedimentation of untreated diamond nanoparticles at settling times of (a)0min, (b)1min, (c)2min, (d)3min, (e)4min, (f)5min, and (g)6min

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Figure 3

Transmission electron microscopy image of diamond nanoparticles collected from suspension phases in a motionless nanofluid

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Figure 4

Experimental setup

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Figure 5

Thermal resistance comparison between a water charged OHP and a nanofluid charged OHP (filling ratio=50%, vertical, Top=20°C)

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Figure 6

Thermal resistance at various heat loads and operating temperatures




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