Abstract
In this study, an experimental exploration was conducted on a surface-modified fuel stack radiator to examine the heat transfer rate with nanofluids. The inner and outer surfaces of the fins and the outer surface of the tube were roughened using a shot blasting process. Nanofluids were formulated with different volume fractions, including 0.05, 0.15, and 0.3% of functionalized graphene nanoplatelets (FGNPs) dispersed in a water/ethylene glycol mixture (45:55 by volume). A remarkable improvement in thermal conductivity, enhancement up to 10.2%, was observed at 0.3 vol % of FGNPs, specifically at 50 °C. An impressive 85.3% enhancement in CHTC is observed at 40 °C inlet temperature, and MFR of 0.057 kg s–1 and 93.11% at 50 °C is noted with a loading concentration of 0.3 vol % of FGNPs. Nusselt number is enhanced by 67.07% at 40 °C and 74.12% at 50 °C.
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The experimental datasets supporting the results of this article are included within the article.
Abbreviations
- Al:
-
Aluminum
- Al2O3 :
-
Aluminum oxide
- BL:
-
Boundary layer
- CHTC:
-
Convective heat transfer coefficient
- CNT:
-
Carbon nanotubes
- Cu:
-
Copper
- CuO:
-
Copper oxide
- CS:
-
Colloidal stability
- DSC:
-
Differential scanning calorimeter
- DW:
-
Deionized water
- EG:
-
Ethylene glycol
- ELS:
-
Electrophoretic light scattering
- GNP:
-
Graphene nanoplatelets
- GO:
-
Graphene oxide
- FCV:
-
Flow control valve
- FGNPs:
-
Functionalized graphene nanoplatelets
- FCEVs:
-
Fuel cell electric vehicles
- FE-SEM:
-
Field emission scanning electron microscopy
- ff :
-
Friction factor
- H2O:
-
Water
- HTF:
-
Heat transfer fluid
- HRSEM:
-
High-resolution scanning electron microscopy
- ICE:
-
Internal combustion engine
- LPM:
-
Liter per minute
- MFR:
-
Mass flow rate
- MWCNT:
-
Multi-walled carbon nanotubes
- Nu:
-
Nusselt number
- PSD:
-
Particle size distribution
- SEM:
-
Scanning electron microscope
- SHC:
-
Specific heat capacity
- SS:
-
Stainless steel
- VFs:
-
Volume fractions
- TC:
-
Thermal conductivity
- TEM:
-
Transmission electron microscope
- TiO2 :
-
Titanium dioxide
- ZP:
-
Zeta potential
- ZnO:
-
Zinc oxide
- µ :
-
Dynamic viscosity (Pa s)
- c p :
-
Specific heat capacity (J kg−1 K−1)
- g :
-
Acceleration due to gravity (m s−2)
- k :
-
Thermal conductivity (W m−1 K−1)
- ρ :
-
Density (kg. m−3)
- ϕ :
-
Mass fraction/Volume concentration
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Acknowledgements
Poongavanam GaneshKumar, Palanichamy Sundaram, and Anbalagan Sathishkumar would like to thank the Department of Mechanical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur Campus, Tamil Nadu, for providing the facilities (DSC, TEMPOS) to carry out the research work.
Funding
The authors extend their appreciation to the Deputyship for Research and Innovation, Ministry of Education in Saudi Arabia for funding this research work through the project no. (IFKSUOR3-099-10).
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GP was involved in preparation of the manuscript, conceptualization, methodology, resources, formal analysis, writing—original draft preparation, review and editing, supervision, and investigation. PS, AS, KS, SB, PS, and MM participated in writing—original draft preparation, review and editing, and formal analysis. ANA helped in review and editing.
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Poongavanam, G., Sundaram, P., Sathishkumar, A. et al. Augmenting the heat transfer performance of automobile radiators by combining surface modification and nanofluid techniques. J Therm Anal Calorim 149, 4087–4102 (2024). https://doi.org/10.1007/s10973-024-12988-x
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DOI: https://doi.org/10.1007/s10973-024-12988-x