Effect of nanoparticles on CHF enhancement in pool boiling of nano-fluids
SCIE
SCOPUS
- Title
- Effect of nanoparticles on CHF enhancement in pool boiling of nano-fluids
- Authors
- Kim, H; Kim, J; Kim, MH
- Date Issued
- 2006-12
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- To investigate the characteristics of CHF (Critical Heat Flux) enhancement using nano-fluids, pool boiling CHF experiments of two water-based nano-fluids with titania and alumina nanoparticles were performed using electrically heated metal wires under atmospheric pressure. The results showed that the water-based nano-fluids significantly enhanced CHF compared to that of pure water. SEM (Scanning Electron Microscopy) observation subsequent to the pool boiling experiments revealed that a lot of nanoparticles were deposited on heating surface during pool boiling of nano-fluids. In order to investigate the role of the nanoparticle surface coating on CHF enhancement of nano-fluids, pool boiling CHF of pure water was measured using a nanoparticle-coated heater prepared by pool boiling of nano-fluids on a bare heater. It was found that pool boiling of pure water on the naonoparticle-coated heater sufficiently achieved the CHF enhancement of nano-fluids. It is supposed that CHF enhancement in pool boiling of nano-fluids is mainly caused by the nanoparticle coating of the heating surface. (c) 2006 Elsevier Ltd. All rights reserved.
- Keywords
- nano-fluids; nanoparticle surface coating; pool boiling Critical Heat Flux (CHF); HEAT-TRANSFER; SURFACE; WATER
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23702
- DOI
- 10.1016/j.ijheatmasstransfer.2006.07.019
- ISSN
- 0017-9310
- Article Type
- Article
- Citation
- INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, vol. 49, no. 25-26, page. 5070 - 5074, 2006-12
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