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Pool boiling of Nanofluids on flat heaters

Witharana, S, Chen, H and Ding, Y (2009) Pool boiling of Nanofluids on flat heaters. In: 11th UK National Heat Transfer Conference. 11th UK National Heat Transfer Conference, 6-8 September 2009, Queen Mary, University of London, UK. .

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Abstract

Water-based γ-Aumina and Carbon nanotubes nanofluids have been examined for pool boiling heat transfer in atmospheric pressure on horizontal flat heaters. The particle concentrations were 0.1wt% and 0.01wt%. All nanofluids were stable and set to pH7 before boiling. Depending on surface roughness, the copper heaters were categorised as smooth or rough. Nanoparticles were spherical or acicular shapes. Boiling heat fluxes were varied up to 189kW/m2. Nanoparticles were of three different shapes, and the nanofluids were in three concentrations. It has been found that dilute nanofluids are capable of enhancing BHT. Particle deposition occurs on the heater which increases with concentration. Moreover, dense nanofluids introduce thermal instability to the system. The importance of the ability of a nanofluid to withstand boiling temperature is also highlighted.

Item Type: Proceedings Paper
Keywords: nanofluids, pool boiling, particles, deposition, enhancement, deterioration
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Process, Environmental and Materials Engineering (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 15 Sep 2011 09:50
Last Modified: 08 Feb 2013 17:33
Status: Published
URI: http://eprints.whiterose.ac.uk/id/eprint/43271

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