This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a Turbo-BII-HP boiling surface. An Al2O3 nanolubricant (a lubricant containing dispersed nano-size particles) was made by suspending nominally 10 nm diameter Al2O3 particles in a synthetic polyolester to roughly a 1.0% volume fraction. The nanoparticles caused, on average, a 12% degradation in the boiling heat transfer relative to that for R134a/polyolester mixtures without nanoparticles for the three lubricant mass fractions that were tested. The degradation was nearly constant for heat fluxes between 20 kW/m2 and 120 kW/m2. It was speculated that the boiling heat transfer degradation was primarily due to a combination of (1) film boiling in the reentrant cavity rendering the nucleate boiling enhancement mechanism of the nanoparticles ineffective and (2) a reduction in bubble frequency due to the increased surface wetting as caused by the nanoparticles. In addition, these degradation factors might be mitigated with increased nanoparticle loading.
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ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer
March 3–6, 2012
Atlanta, Georgia, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-5477-8
PROCEEDINGS PAPER
Effect of Al2O3 Nanolubricant on a Turbo-BII R134a Pool Boiling Surface
M. A. Kedzierski
M. A. Kedzierski
National Institute of Standards and Technology, Gaithersburg, MD
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M. A. Kedzierski
National Institute of Standards and Technology, Gaithersburg, MD
Paper No:
MNHMT2012-75024, pp. 355-362; 8 pages
Published Online:
July 18, 2013
Citation
Kedzierski, MA. "Effect of Al2O3 Nanolubricant on a Turbo-BII R134a Pool Boiling Surface." Proceedings of the ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. Atlanta, Georgia, USA. March 3–6, 2012. pp. 355-362. ASME. https://doi.org/10.1115/MNHMT2012-75024
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