Nanoparticle-Assisted Pool Boiling Heat Transfer on Micro-Pin-Fin Surfaces
Cao, Zhen LU ; Liu, Bin ; Preger, Calle LU
; Zhang, Yonghai
; Wu, Zan
LU
; Messing, Maria
LU
; Deppert, Knut
LU
; Wei, Jinjia
and Sundén, Bengt
LU
(2021)
In Langmuir
37(3).
p.1089-1101
- Abstract
- Boiling heat transfer intensification is of significant relevance to energy conversion and various cooling processes. This study aimed to enhance the saturated pool boiling of FC-72 (a dielectric liquid) by surface modifications and explore mechanisms of the enhancement. Specifically, circular and square micro pin fins were fabricated on silicon surfaces by dry etching and then copper nanoparticles were deposited on the micro-pin-fin surfaces by electrostatic deposition. Experimental results indicated that compared with a smooth surface, the micro pin fins increased the heat transfer coefficient and the critical heat flux by more than 200 and 65–83%, respectively, which were further enhanced by the nanoparticles up to 24% and more than... (More)
- Boiling heat transfer intensification is of significant relevance to energy conversion and various cooling processes. This study aimed to enhance the saturated pool boiling of FC-72 (a dielectric liquid) by surface modifications and explore mechanisms of the enhancement. Specifically, circular and square micro pin fins were fabricated on silicon surfaces by dry etching and then copper nanoparticles were deposited on the micro-pin-fin surfaces by electrostatic deposition. Experimental results indicated that compared with a smooth surface, the micro pin fins increased the heat transfer coefficient and the critical heat flux by more than 200 and 65–83%, respectively, which were further enhanced by the nanoparticles up to 24% and more than 20%, respectively. Correspondingly, the enhancement mechanism was carefully explored by high-speed bubble visualizations, surface wickability measurements, and model analysis. It was quantitatively found that small bubble departure diameters with high bubble departure frequencies promoted high heat transfer coefficients. The wickability, which characterizes the ability of a liquid to rewet a surface, played an important role in determining the critical heat flux, but further analyses indicated that evaporation beneath bubbles was also essential and competition between the wicking and the evaporation finally triggered the critical heat flux. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/34275b7a-8e7c-46e3-924c-f51859d2905e
- author
- Cao, Zhen
LU
; Liu, Bin
; Preger, Calle
LU
; Zhang, Yonghai
; Wu, Zan
LU
; Messing, Maria
LU
; Deppert, Knut
LU
; Wei, Jinjia
and Sundén, Bengt
LU
- organization
- publishing date
- 2021-01-26
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 37
- issue
- 3
- pages
- 13 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85100095681
- scopus:85100095681
- pmid:33417766
- ISSN
- 0743-7463
- DOI
- 10.1021/acs.langmuir.0c02860
- language
- English
- LU publication?
- yes
- id
- 34275b7a-8e7c-46e3-924c-f51859d2905e
- date added to LUP
- 2021-11-02 20:01:34
- date last changed
- 2024-04-20 14:38:29
@article{34275b7a-8e7c-46e3-924c-f51859d2905e,
abstract = {{Boiling heat transfer intensification is of significant relevance to energy conversion and various cooling processes. This study aimed to enhance the saturated pool boiling of FC-72 (a dielectric liquid) by surface modifications and explore mechanisms of the enhancement. Specifically, circular and square micro pin fins were fabricated on silicon surfaces by dry etching and then copper nanoparticles were deposited on the micro-pin-fin surfaces by electrostatic deposition. Experimental results indicated that compared with a smooth surface, the micro pin fins increased the heat transfer coefficient and the critical heat flux by more than 200 and 65–83%, respectively, which were further enhanced by the nanoparticles up to 24% and more than 20%, respectively. Correspondingly, the enhancement mechanism was carefully explored by high-speed bubble visualizations, surface wickability measurements, and model analysis. It was quantitatively found that small bubble departure diameters with high bubble departure frequencies promoted high heat transfer coefficients. The wickability, which characterizes the ability of a liquid to rewet a surface, played an important role in determining the critical heat flux, but further analyses indicated that evaporation beneath bubbles was also essential and competition between the wicking and the evaporation finally triggered the critical heat flux.}},
author = {{Cao, Zhen and Liu, Bin and Preger, Calle and Zhang, Yonghai and Wu, Zan and Messing, Maria and Deppert, Knut and Wei, Jinjia and Sundén, Bengt}},
issn = {{0743-7463}},
language = {{eng}},
month = {{01}},
number = {{3}},
pages = {{1089--1101}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Nanoparticle-Assisted Pool Boiling Heat Transfer on Micro-Pin-Fin Surfaces}},
url = {{http://dx.doi.org/10.1021/acs.langmuir.0c02860}},
doi = {{10.1021/acs.langmuir.0c02860}},
volume = {{37}},
year = {{2021}},
}