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Experimental comparative evaluation of a graphene nanofluid coolant in miniature plate heat exchanger

Wang, Zhe LU ; Wu, Zan LU ; Han, Fenghui; Wadsö, Lars LU and Sundén, Bengt LU (2018) In International Journal of Thermal Sciences 130. p.148-156
Abstract

As a novel coolant, the ethylene glycol-water (50 wt.%:50 wt.%) with graphene nanoplatelets nanofluids (GnP-EGW) were prepared at four weight concentrations (0.01, 0.1 0.5 and 1.0 wt.%), and heat transfer and pressure drop characteristics in a miniature plate heat exchanger (MPHE) were investigated. All nanofluid samples were prepared and diluted by ultrasonic vibration, and their thermal conductivity and dynamic viscosity were measured by a transient plane source method and a rotational rheometer, respectively. Firstly, the convective heat transfer coefficient (HTC) and pressure drop correlations were predicted under the condition that water was employed as working fluid in both the hot and cold sides of the MPHE. Then, the effects of... (More)

As a novel coolant, the ethylene glycol-water (50 wt.%:50 wt.%) with graphene nanoplatelets nanofluids (GnP-EGW) were prepared at four weight concentrations (0.01, 0.1 0.5 and 1.0 wt.%), and heat transfer and pressure drop characteristics in a miniature plate heat exchanger (MPHE) were investigated. All nanofluid samples were prepared and diluted by ultrasonic vibration, and their thermal conductivity and dynamic viscosity were measured by a transient plane source method and a rotational rheometer, respectively. Firstly, the convective heat transfer coefficient (HTC) and pressure drop correlations were predicted under the condition that water was employed as working fluid in both the hot and cold sides of the MPHE. Then, the effects of GnP concentrations of nanofluids on the thermal and hydraulic performances have been determined for the MPHE with the nanofluid in hot side and the water in cold side. Parametric evaluation and performance comparison of the MPHE using GnP-EGW were analyzed via various operating conditions. Experimental analysis showed that: the proposed correlations from water can predict the experimental data of the base fluid and GnP-EGW nanofluids. In the proper concentration range from 0.01 to 0.1 wt.%, the GnP-EGW nanofluid has an acceptable pressure drop penalty but a higher heat transfer performance compared with the base fluid in the MPHE, which reveals that it might be a potential cooling medium.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coolant, Graphene nanoplatelets, Heat transfer enhancement, Miniature plate heat exchanger, Nanofluids, Pressure drop
in
International Journal of Thermal Sciences
volume
130
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85046089603
ISSN
1290-0729
DOI
10.1016/j.ijthermalsci.2018.04.021
language
English
LU publication?
yes
id
2ed2bdf5-5e2f-44c6-b20b-c049eed2bc6b
date added to LUP
2018-05-07 13:25:52
date last changed
2019-10-15 06:37:20
@article{2ed2bdf5-5e2f-44c6-b20b-c049eed2bc6b,
  abstract     = {<p>As a novel coolant, the ethylene glycol-water (50 wt.%:50 wt.%) with graphene nanoplatelets nanofluids (GnP-EGW) were prepared at four weight concentrations (0.01, 0.1 0.5 and 1.0 wt.%), and heat transfer and pressure drop characteristics in a miniature plate heat exchanger (MPHE) were investigated. All nanofluid samples were prepared and diluted by ultrasonic vibration, and their thermal conductivity and dynamic viscosity were measured by a transient plane source method and a rotational rheometer, respectively. Firstly, the convective heat transfer coefficient (HTC) and pressure drop correlations were predicted under the condition that water was employed as working fluid in both the hot and cold sides of the MPHE. Then, the effects of GnP concentrations of nanofluids on the thermal and hydraulic performances have been determined for the MPHE with the nanofluid in hot side and the water in cold side. Parametric evaluation and performance comparison of the MPHE using GnP-EGW were analyzed via various operating conditions. Experimental analysis showed that: the proposed correlations from water can predict the experimental data of the base fluid and GnP-EGW nanofluids. In the proper concentration range from 0.01 to 0.1 wt.%, the GnP-EGW nanofluid has an acceptable pressure drop penalty but a higher heat transfer performance compared with the base fluid in the MPHE, which reveals that it might be a potential cooling medium.</p>},
  author       = {Wang, Zhe and Wu, Zan and Han, Fenghui and Wadsö, Lars and Sundén, Bengt},
  issn         = {1290-0729},
  keyword      = {Coolant,Graphene nanoplatelets,Heat transfer enhancement,Miniature plate heat exchanger,Nanofluids,Pressure drop},
  language     = {eng},
  month        = {08},
  pages        = {148--156},
  publisher    = {Elsevier},
  series       = {International Journal of Thermal Sciences},
  title        = {Experimental comparative evaluation of a graphene nanofluid coolant in miniature plate heat exchanger},
  url          = {http://dx.doi.org/10.1016/j.ijthermalsci.2018.04.021},
  volume       = {130},
  year         = {2018},
}