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Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications

Rashidi, Saman; Hormozi, Faramarz; Sundén, Bengt LU and Mahian, Omid (2019) In Applied Energy 250. p.1491-1547
Abstract

Recently, dimpled surfaces have found great attention due to their abilities in energy management and heat transfer enhancement, low weight, small values of pressure drop penalty, simple fabrication, and small maintenance costs. Many experimental and numerical studies are accomplished to investigate the potentials of dimpled surface technology in energy management of various thermal energy systems. This paper presents a comprehensive review about the developments and current status of this technology employed in different thermal energy systems including heat exchangers, mini/micro energy systems, two-phase flow energy systems, jet impingement cooling systems, and solar thermal energy systems. Moreover, comprehensive discussions... (More)

Recently, dimpled surfaces have found great attention due to their abilities in energy management and heat transfer enhancement, low weight, small values of pressure drop penalty, simple fabrication, and small maintenance costs. Many experimental and numerical studies are accomplished to investigate the potentials of dimpled surface technology in energy management of various thermal energy systems. This paper presents a comprehensive review about the developments and current status of this technology employed in different thermal energy systems including heat exchangers, mini/micro energy systems, two-phase flow energy systems, jet impingement cooling systems, and solar thermal energy systems. Moreover, comprehensive discussions concerning the flow structures and heat transfer behaviours in dimpled surfaces and different geometries and arrangements of dimples are provided. Finally, based on current status of studies in this field, some suggestions are suggested for future researches. The results showed that the main reasons for the convective heat transfer improvement achieved by dimples are flow reattachment, flow impingement, and upwash flow at the downstream region of the dimples, while the heat transfer can be reduced due to flow separation and recirculation in the upstream region of the dimples.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dimpled surface technology, Energy management, Geometries and arrangements, Heat transfer enhancement, Pressure drop penalty, Thermal energy systems
in
Applied Energy
volume
250
pages
57 pages
publisher
Elsevier
external identifiers
  • scopus:85065639981
ISSN
0306-2619
DOI
10.1016/j.apenergy.2019.04.168
language
English
LU publication?
yes
id
b2a42f58-e8cb-4649-9309-4becc2ac3899
date added to LUP
2019-05-28 08:01:01
date last changed
2019-06-19 04:13:45
@article{b2a42f58-e8cb-4649-9309-4becc2ac3899,
  abstract     = {<p>Recently, dimpled surfaces have found great attention due to their abilities in energy management and heat transfer enhancement, low weight, small values of pressure drop penalty, simple fabrication, and small maintenance costs. Many experimental and numerical studies are accomplished to investigate the potentials of dimpled surface technology in energy management of various thermal energy systems. This paper presents a comprehensive review about the developments and current status of this technology employed in different thermal energy systems including heat exchangers, mini/micro energy systems, two-phase flow energy systems, jet impingement cooling systems, and solar thermal energy systems. Moreover, comprehensive discussions concerning the flow structures and heat transfer behaviours in dimpled surfaces and different geometries and arrangements of dimples are provided. Finally, based on current status of studies in this field, some suggestions are suggested for future researches. The results showed that the main reasons for the convective heat transfer improvement achieved by dimples are flow reattachment, flow impingement, and upwash flow at the downstream region of the dimples, while the heat transfer can be reduced due to flow separation and recirculation in the upstream region of the dimples.</p>},
  author       = {Rashidi, Saman and Hormozi, Faramarz and Sundén, Bengt and Mahian, Omid},
  issn         = {0306-2619},
  keyword      = {Dimpled surface technology,Energy management,Geometries and arrangements,Heat transfer enhancement,Pressure drop penalty,Thermal energy systems},
  language     = {eng},
  pages        = {1491--1547},
  publisher    = {Elsevier},
  series       = {Applied Energy},
  title        = {Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications},
  url          = {http://dx.doi.org/10.1016/j.apenergy.2019.04.168},
  volume       = {250},
  year         = {2019},
}