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Nucleate pool boiling heat transfer of acetone and HFE7200 on copper surfaces with nanoparticle coatings

Wu, Zan LU ; Cao, Zhen LU ; Pham, Anh Duc and Sundén, Bengt LU (2019) 10th International Conference on Applied Energy (ICAE2018) In Energy Procedia 158. p.5872-5879
Abstract

Nucleate pool boiling performance of two well-wetting liquids, i.e., acetone and HFE7200, on three nanoparticle-coatedsurfaces were experimentally studied and compared with that of the smoothsurface. Electrophoretic deposition was used to fabricate nano-porous surfaces.Surface roughness, static and advancing contact angles, capillarity of the smoothand coated surfaces were characterized. Compared to the smooth surface, thenanoparticle-coated surfaces decreased the wall superheat by more than 50% foracetone and 65% for HFE7200 at the same heat flux level, and accordinglyenhanced the heat transfer coefficient by up to 85% for acetone and up to 200%for HFE7200. Bubble departure diameters were measured and... (More)

Nucleate pool boiling performance of two well-wetting liquids, i.e., acetone and HFE7200, on three nanoparticle-coatedsurfaces were experimentally studied and compared with that of the smoothsurface. Electrophoretic deposition was used to fabricate nano-porous surfaces.Surface roughness, static and advancing contact angles, capillarity of the smoothand coated surfaces were characterized. Compared to the smooth surface, thenanoparticle-coated surfaces decreased the wall superheat by more than 50% foracetone and 65% for HFE7200 at the same heat flux level, and accordinglyenhanced the heat transfer coefficient by up to 85% for acetone and up to 200%for HFE7200. Bubble departure diameters were measured and correlated with theadvancing contact angle, the capillary length and the Jacob number. A newmechanistic heat transfer model was proposed based on the heat flux partitionmethod. The advancing contact angle was suggested to be used for calculation ofthe active nucleation site density. Based on the mechanistic model, transientheat conduction on and around nucleation sites over the whole bubble cyclecontributes the most (>70%) to the total heat flux, while microlayerevaporation contributes around 10-30% to the total heat flux, with negligiblenatural convection. The critical heat flux was not enhanced for the twowell-wetting liquids.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pool boiling, heat transfer coefficient, nanoparticle, electrophoretic deposition, critical heat flux, heat transfer modelling
in
Energy Procedia
volume
158
pages
8 pages
publisher
Elsevier
conference name
10th International Conference on Applied Energy (ICAE2018)
conference location
Hong Kong, China
conference dates
2018-08-21 - 2018-08-25
external identifiers
  • scopus:77954329650
  • scopus:85063870569
ISSN
1876-6102
DOI
10.1016/j.egypro.2019.01.538
language
English
LU publication?
yes
id
de67ea19-6305-4e2e-ba6d-2fb7d72059ab
date added to LUP
2018-11-01 09:27:32
date last changed
2019-04-23 10:43:18
@article{de67ea19-6305-4e2e-ba6d-2fb7d72059ab,
  abstract     = {<p class="Els-Abstract-text">Nucleate pool boiling performance of two well-wetting liquids, i.e., acetone and HFE7200, on three nanoparticle-coatedsurfaces were experimentally studied and compared with that of the smoothsurface. Electrophoretic deposition was used to fabricate nano-porous surfaces.Surface roughness, static and advancing contact angles, capillarity of the smoothand coated surfaces were characterized. Compared to the smooth surface, thenanoparticle-coated surfaces decreased the wall superheat by more than 50% foracetone and 65% for HFE7200 at the same heat flux level, and accordinglyenhanced the heat transfer coefficient by up to 85% for acetone and up to 200%for HFE7200. Bubble departure diameters were measured and correlated with theadvancing contact angle, the capillary length and the Jacob number. A newmechanistic heat transfer model was proposed based on the heat flux partitionmethod. The advancing contact angle was suggested to be used for calculation ofthe active nucleation site density. Based on the mechanistic model, transientheat conduction on and around nucleation sites over the whole bubble cyclecontributes the most (&gt;70%) to the total heat flux, while microlayerevaporation contributes around 10-30% to the total heat flux, with negligiblenatural convection. The critical heat flux was not enhanced for the twowell-wetting liquids.</p>},
  author       = {Wu, Zan and Cao, Zhen and Pham, Anh Duc and Sundén, Bengt},
  issn         = {1876-6102},
  keyword      = {pool boiling,heat transfer coefficient,nanoparticle,electrophoretic deposition,critical heat flux,heat transfer modelling},
  language     = {eng},
  location     = {Hong Kong, China},
  pages        = {5872--5879},
  publisher    = {Elsevier},
  series       = {Energy Procedia},
  title        = {Nucleate pool boiling heat transfer of acetone and HFE7200 on copper surfaces with nanoparticle coatings},
  url          = {http://dx.doi.org/10.1016/j.egypro.2019.01.538},
  volume       = {158},
  year         = {2019},
}