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Modeling natural convection heat transfer from perforated plates

Wu, Zan LU ; Li, Wei; Sun, Zhi-jian and Hong, Rong-hua (2012) In Journal of Zhejiang University: Science A 13(5). p.353-360
Abstract
Staggered pattern perforations are introduced to isolated isothermal plates, vertical parallel isothermal plates, and vertical rectangular isothermal fins under natural convection conditions. The performance of perforations was evaluated theoretically based on existing correlations by considering effects of ratios of open area, inclined angles, and other geometric parameters. It was found that staggered pattern perforations can increase the total heat transfer rate for isolated isothermal plates and vertical parallel plates, with low ratios of plate height to wall-to-wall spacing (H/s), by a factor of 1.07 to 1.21, while only by a factor of 1.03 to 1.07 for vertical rectangular isothermal fins, and the magnitude of enhancement is... (More)
Staggered pattern perforations are introduced to isolated isothermal plates, vertical parallel isothermal plates, and vertical rectangular isothermal fins under natural convection conditions. The performance of perforations was evaluated theoretically based on existing correlations by considering effects of ratios of open area, inclined angles, and other geometric parameters. It was found that staggered pattern perforations can increase the total heat transfer rate for isolated isothermal plates and vertical parallel plates, with low ratios of plate height to wall-to-wall spacing (H/s), by a factor of 1.07 to 1.21, while only by a factor of 1.03 to 1.07 for vertical rectangular isothermal fins, and the magnitude of enhancement is proportional to the ratio of open area. However, staggered pattern perforations are detrimental to heat transfer enhancement of vertical parallel plates with large H/s ratios. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Zhejiang University: Science A
volume
13
issue
5
pages
353 - 360
publisher
Zhejiang University Press
external identifiers
  • scopus:84870347278
ISSN
1673-565X
DOI
10.1631/jzus.A1100222
language
English
LU publication?
no
id
cdc6f6b7-2771-4c4d-8179-c313bde46fca (old id 4285386)
date added to LUP
2014-02-07 10:57:49
date last changed
2017-11-05 03:00:33
@article{cdc6f6b7-2771-4c4d-8179-c313bde46fca,
  abstract     = {Staggered pattern perforations are introduced to isolated isothermal plates, vertical parallel isothermal plates, and vertical rectangular isothermal fins under natural convection conditions. The performance of perforations was evaluated theoretically based on existing correlations by considering effects of ratios of open area, inclined angles, and other geometric parameters. It was found that staggered pattern perforations can increase the total heat transfer rate for isolated isothermal plates and vertical parallel plates, with low ratios of plate height to wall-to-wall spacing (H/s), by a factor of 1.07 to 1.21, while only by a factor of 1.03 to 1.07 for vertical rectangular isothermal fins, and the magnitude of enhancement is proportional to the ratio of open area. However, staggered pattern perforations are detrimental to heat transfer enhancement of vertical parallel plates with large H/s ratios.},
  author       = {Wu, Zan and Li, Wei and Sun, Zhi-jian and Hong, Rong-hua},
  issn         = {1673-565X},
  language     = {eng},
  number       = {5},
  pages        = {353--360},
  publisher    = {Zhejiang University Press},
  series       = {Journal of Zhejiang University: Science A},
  title        = {Modeling natural convection heat transfer from perforated plates},
  url          = {http://dx.doi.org/10.1631/jzus.A1100222},
  volume       = {13},
  year         = {2012},
}