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Experimental Study of Enhanced Pool Boiling Heat Transfer Using Graphite Foam Inserts

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Abstract:

This paper presents the results of an experimental study of heat transfer in a pool boiling evaporator with porous insert. Different types of graphite foams were tested with the phase change coolant FC-72 in a designed thermosyphon. Comparisons between the graphite foams and a solid copper block show that the porous structure enhances pool boiling significantly. The boiling thermal resistance of the tested graphite foams was found to be about 2 times lower than that of the copper block. The bubble formation recorded by a high speed camera indicates that boiling from a graphite foam is more vigorous than from a copper block. The designed thermosyphon with graphite foam insert can remove heat fluxes of up to 112 W/cm2 with the maximum heater temperature maintained below 100°C.

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Diffusion in Solids and Liquids VI View Preview

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Periodical:

Defect and Diffusion Forum (Volumes 312-315)

Pages:

352-357

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.312-315.352

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Online since:

April 2011

Authors:

K.C. Leong, L.W. Jin, I. Pranoto, H.Y Li, J.C. Chai

Keywords:

Bubble Formation, Graphite Foam, Pool Boiling, Superheat, Thermal Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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