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Open AccessEditor’s ChoiceArticle

Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger

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School of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5000, Australia
2
Division of Computational Physics, Institute for Computational Science, Ton Duc Tang University, Ho Chi Minh City 758307, Vietnam
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Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
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School of Engineering, Ocean University of China, Qingdao 266100, China
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Department of Mechanical Engineering, Lamar University, Beaumont, TX 77705, USA
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School of Mechanical Engineering, Federal University of Uberlandia (UFU), Av. Joao Naves de Avila, 2121, Santa Monica, Uberlandia, MG 38408-514, Brazil
*
Author to whom correspondence should be addressed.
Energies 2019, 12(10), 1929; https://doi.org/10.3390/en12101929
Received: 23 April 2019 / Revised: 9 May 2019 / Accepted: 15 May 2019 / Published: 20 May 2019
(This article belongs to the Special Issue Experimental Heat Transfer in Energy Systems)
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. View Full-Text
Keywords: graphene nano-platelets; micro-channel; thermal performance; nanofluid graphene nano-platelets; micro-channel; thermal performance; nanofluid
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MDPI and ACS Style

Sarafraz, M.M.; Safaei, M.R.; Tian, Z.; Goodarzi, M.; Bandarra Filho, E.P.; Arjomandi, M. Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger. Energies 2019, 12, 1929. https://doi.org/10.3390/en12101929

AMA Style

Sarafraz MM, Safaei MR, Tian Z, Goodarzi M, Bandarra Filho EP, Arjomandi M. Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger. Energies. 2019; 12(10):1929. https://doi.org/10.3390/en12101929

Chicago/Turabian Style

Sarafraz, M. M.; Safaei, Mohammad R.; Tian, Zhe; Goodarzi, Marjan; Bandarra Filho, Enio P.; Arjomandi, M. 2019. "Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger" Energies 12, no. 10: 1929. https://doi.org/10.3390/en12101929

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