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Numerical optimization of louvered fin heat exchanger with variable louver angles

Bernd Ameel UGent, Joris Degroote UGent, Henk Huisseune UGent, Peter De Jaeger UGent, Jan Vierendeels UGent and Michel De Paepe UGent (2012) Journal of Physics Conference Series. 395.
abstract
Several studies of the louvered fin heat exchanger have already been done. Both experimental and numerical studies are available. Investigations to the optimal louver angle have been performed, many times in combination with other fin parameters such as louver pitch and fin thickness. Most studies assume a single louver angle for all the louvers in the heat exchanger. Hsieh and Jang [1] on the other hand studied the effect of a variable louver angle for 5 different cases with successively increasing or decreasing louver angles. Tube-fin interactions were not taken into account. In this study, a round tube and fin geometry with individually varying louver angles is analyzed. The thickness of the fin was neglected. Any interactions between the optimal louver angles and the fin thickness are hence not captured. A laminar and steady calculation was performed, with symmetric boundary conditions. For the Reynolds number on the hydraulic diameter (Re-Dh) of 535 that was studied, a Von Karman vortex street is present behind the last tube row of heat exchanger. The steady calculation is hence only an approximation of the reality, but is shown to give reasonable results. An ordinary kriging response surface model was used to explore the entire parameter space. Updates to the model were made on the basis of improving the Pareto front, visualizing the tradeoff between heat transfer and pressure drop. It is shown that the use of individually varying louver angles allows increasing the Colburn j factor by 1.3% for the same friction factor, with respect to the optimal uniform louvered fin configuration.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
FLOW
in
Journal of Physics Conference Series
editor
Daniel Petit and Christophe Le Niliot
volume
395
issue title
6TH EUROPEAN THERMAL SCIENCES CONFERENCE (EUROTHERM 2012)
article_number
012054
pages
8 pages
publisher
Editions Société Française de Thermique
conference name
6th European Thermal Sciences Conference (Eurotherm)
conference location
Poitiers, France
conference start
2012-09-04
conference end
2012-09-07
Web of Science type
Proceedings Paper
Web of Science id
000312264800054
ISSN
1742-6588
ISBN
9782905267849
DOI
10.1088/1742-6596/395/1/012054
language
English
UGent publication?
yes
classification
P1
copyright statement
I have retained and own the full copyright for this publication
id
2984107
handle
http://hdl.handle.net/1854/LU-2984107
date created
2012-09-10 11:11:34
date last changed
2013-06-21 16:03:43
@inproceedings{2984107,
  abstract     = {Several studies of the louvered fin heat exchanger have already been done. Both experimental and numerical studies are available. Investigations to the optimal louver angle have been performed, many times in combination with other fin parameters such as louver pitch and fin thickness. Most studies assume a single louver angle for all the louvers in the heat exchanger. Hsieh and Jang [1] on the other hand studied the effect of a variable louver angle for 5 different cases with successively increasing or decreasing louver angles. Tube-fin interactions were not taken into account. In this study, a round tube and fin geometry with individually varying louver angles is analyzed. The thickness of the fin was neglected. Any interactions between the optimal louver angles and the fin thickness are hence not captured. A laminar and steady calculation was performed, with symmetric boundary conditions. For the Reynolds number on the hydraulic diameter (Re-Dh) of 535 that was studied, a Von Karman vortex street is present behind the last tube row of heat exchanger. The steady calculation is hence only an approximation of the reality, but is shown to give reasonable results. An ordinary kriging response surface model was used to explore the entire parameter space. Updates to the model were made on the basis of improving the Pareto front, visualizing the tradeoff between heat transfer and pressure drop. It is shown that the use of individually varying louver angles allows increasing the Colburn j factor by 1.3\% for the same friction factor, with respect to the optimal uniform louvered fin configuration.},
  articleno    = {012054},
  author       = {Ameel, Bernd and Degroote, Joris and Huisseune, Henk and De Jaeger, Peter and Vierendeels, Jan and De Paepe, Michel},
  booktitle    = {Journal of Physics Conference Series},
  editor       = {Petit, Daniel and Le Niliot, Christophe},
  isbn         = {9782905267849},
  issn         = {1742-6588},
  keyword      = {FLOW},
  language     = {eng},
  location     = {Poitiers, France},
  pages        = {8},
  publisher    = {Editions Soci{\'e}t{\'e} Fran\c{c}aise de Thermique},
  title        = {Numerical optimization of louvered fin heat exchanger with variable louver angles},
  url          = {http://dx.doi.org/10.1088/1742-6596/395/1/012054},
  volume       = {395},
  year         = {2012},
}

Chicago
Ameel, Bernd, Joris Degroote, Henk Huisseune, Peter De Jaeger, Jan Vierendeels, and Michel De Paepe. 2012. “Numerical Optimization of Louvered Fin Heat Exchanger with Variable Louver Angles.” In Journal of Physics Conference Series, ed. Daniel Petit and Christophe Le Niliot. Vol. 395. Editions Société Française de Thermique.
APA
Ameel, B., Degroote, J., Huisseune, H., De Jaeger, P., Vierendeels, J., & De Paepe, M. (2012). Numerical optimization of louvered fin heat exchanger with variable louver angles. In D. Petit & C. Le Niliot (Eds.), Journal of Physics Conference Series (Vol. 395). Presented at the 6th European Thermal Sciences Conference (Eurotherm), Editions Société Française de Thermique.
Vancouver
1.
Ameel B, Degroote J, Huisseune H, De Jaeger P, Vierendeels J, De Paepe M. Numerical optimization of louvered fin heat exchanger with variable louver angles. In: Petit D, Le Niliot C, editors. Journal of Physics Conference Series. Editions Société Française de Thermique; 2012.
MLA
Ameel, Bernd, Joris Degroote, Henk Huisseune, et al. “Numerical Optimization of Louvered Fin Heat Exchanger with Variable Louver Angles.” Journal of Physics Conference Series. Ed. Daniel Petit & Christophe Le Niliot. Vol. 395. Editions Société Française de Thermique, 2012. Print.