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Thermophysical properties and convection heat transfer behavior of ionic liquid [C4mim][NTf2] at medium temperature in helically corrugated tubes

Wang, Wei LU ; Wu, Zan LU ; Zhang, Yaning ; Li, Bingxi and Sundén, Bengt LU (2018) In Applied Thermal Engineering 142. p.457-465
Abstract

The thermophysical properties of the ionic liquid, 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [C4mim][NTf2], at medium temperature, were predicted based on a summary of previous literature data. Furthermore, the heat transfer behavior in smooth and corrugated tubes was numerically studied, using different fluid temperatures and corrugation heights. A multi-objective optimization method was used to obtain the optimal solutions from a set of feasible solutions. The result show that the empirical formulas can well predict the density, heat capacity, and thermal conductivity conditions, yet show small errors on different viscosity conditions. The heat transfer performance for high-temperature... (More)

The thermophysical properties of the ionic liquid, 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [C4mim][NTf2], at medium temperature, were predicted based on a summary of previous literature data. Furthermore, the heat transfer behavior in smooth and corrugated tubes was numerically studied, using different fluid temperatures and corrugation heights. A multi-objective optimization method was used to obtain the optimal solutions from a set of feasible solutions. The result show that the empirical formulas can well predict the density, heat capacity, and thermal conductivity conditions, yet show small errors on different viscosity conditions. The heat transfer performance for high-temperature fluids is quite superior to that in the low temperature condition, as well as on pressure drop. The growth rate of the heat transfer performance is significant for the cases of corrugation height to diameter ratio equal to 0.025 and 0.05. In addition, the overall heat transfer performance presents an interval optimum principle, where the Reynolds number is inversely proportional to the corrugation height, except for the case of corrugation height to diameter ratio equal to 0.15. The response values of the Pareto optimal solution correspond to Nusselt number = 724.6, Poiseuille number = 1519.8 and Overall heat transfer performance = 1.01, with the Reynolds number = 70,490 and ratio of corrugation height to diameter = 0.0252.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Convection heat transfer, Helically corrugated tube, Ionic liquid, Medium temperature, Multi-objective optimization, Thermophysical properties
in
Applied Thermal Engineering
volume
142
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85049796652
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2018.07.035
language
English
LU publication?
yes
id
d35b5714-4778-4b36-8962-8ce2338b9425
date added to LUP
2018-09-07 12:08:43
date last changed
2021-09-08 02:07:44
@article{d35b5714-4778-4b36-8962-8ce2338b9425,
  abstract     = {<p>The thermophysical properties of the ionic liquid, 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [C<sub>4</sub>mim][NTf<sub>2</sub>], at medium temperature, were predicted based on a summary of previous literature data. Furthermore, the heat transfer behavior in smooth and corrugated tubes was numerically studied, using different fluid temperatures and corrugation heights. A multi-objective optimization method was used to obtain the optimal solutions from a set of feasible solutions. The result show that the empirical formulas can well predict the density, heat capacity, and thermal conductivity conditions, yet show small errors on different viscosity conditions. The heat transfer performance for high-temperature fluids is quite superior to that in the low temperature condition, as well as on pressure drop. The growth rate of the heat transfer performance is significant for the cases of corrugation height to diameter ratio equal to 0.025 and 0.05. In addition, the overall heat transfer performance presents an interval optimum principle, where the Reynolds number is inversely proportional to the corrugation height, except for the case of corrugation height to diameter ratio equal to 0.15. The response values of the Pareto optimal solution correspond to Nusselt number = 724.6, Poiseuille number = 1519.8 and Overall heat transfer performance = 1.01, with the Reynolds number = 70,490 and ratio of corrugation height to diameter = 0.0252.</p>},
  author       = {Wang, Wei and Wu, Zan and Zhang, Yaning and Li, Bingxi and Sundén, Bengt},
  issn         = {1359-4311},
  language     = {eng},
  month        = {09},
  pages        = {457--465},
  publisher    = {Elsevier},
  series       = {Applied Thermal Engineering},
  title        = {Thermophysical properties and convection heat transfer behavior of ionic liquid [C<sub>4</sub>mim][NTf<sub>2</sub>] at medium temperature in helically corrugated tubes},
  url          = {http://dx.doi.org/10.1016/j.applthermaleng.2018.07.035},
  doi          = {10.1016/j.applthermaleng.2018.07.035},
  volume       = {142},
  year         = {2018},
}