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Thermal assessment of nano-particulate graphene-water/ethylene glycol (WEG 60:40) nano-suspension in a compact heat exchanger

Sarafraz, Mohammad Mohsen, Safaei, Mohammad Reza, Tian, Zhe, Goodarzi, Marjan, Filho, Enio Pedone Bandarra and Arjomandi, M 2019, Thermal assessment of nano-particulate graphene-water/ethylene glycol (WEG 60:40) nano-suspension in a compact heat exchanger, Energies, vol. 12, no. 10, pp. 1-17, doi: 10.3390/en12101929.

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Title Thermal assessment of nano-particulate graphene-water/ethylene glycol (WEG 60:40) nano-suspension in a compact heat exchanger
Author(s) Sarafraz, Mohammad MohsenORCID iD for Sarafraz, Mohammad Mohsen orcid.org/0000-0002-6347-0216
Safaei, Mohammad Reza
Tian, Zhe
Goodarzi, Marjan
Filho, Enio Pedone Bandarra
Arjomandi, M
Journal name Energies
Volume number 12
Issue number 10
Article ID 1929
Start page 1
End page 17
Total pages 17
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2019-05
ISSN 1996-1073
1996-1073
Keyword(s) Science & Technology
Technology
Energy & Fuels
graphene nano-platelets
micro-channel
thermal performance
nanofluid
Summary In the present study, we report the results of the experiments conducted on the convective heat transfer of graphene nano-platelets dispersed in water-ethylene glycol. The graphene nano-suspension was employed as a coolant inside a micro-channel and heat-transfer coefficient (HTC) and pressure drop (PD) values of the system were reported at different operating conditions. The results demonstrated that the use of graphene nano-platelets can potentially augment the thermal conductivity of the working fluid by 32.1% (at wt. % = 0.3 at 60 °C). Likewise, GNP nano-suspension promoted the Brownian motion and thermophoresis effect, such that for the tests conducted within the mass fractions of 0.1%–0.3%, the HTC of the system was improved. However, a trade-off was identified between the PD value and the HTC. By assessing the thermal performance evaluation criteria (TPEC) of the system, it was identified that the thermal performance of the system increased by 21% despite a 12.1% augmentation in the PD value. Furthermore, with an increment in the fluid flow and heat-flux applied to the micro-channel, the HTC was augmented, showing the potential of the nano-suspension to be utilized in high heat-flux thermal applications.
Language eng
DOI 10.3390/en12101929
Indigenous content off
Field of Research 02 Physical Sciences
09 Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30142798

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.