Abstract
The aim of the research work reports the thermal performance of graphene-water-based nanofluid phase change material (NFPCM) with different types of surfactants for a cold thermal storage (CTS) system. The graphene nanoplatelets (GnPs) are dispersed in DI water with the addition of commonly used surfactants, such as cetyltrimethylammonium bromide, sodium dodecylbenzene sulfonate (SDBS), sodium dodecylsulfate (SDS), polysorbate (Tween80), polyvinylpyrrolidone (PVP), and gum arabic (GA). The effect on the stability of different surfactants on the colloidal solution of GnP nanofluids is analyzed by zeta potential and particle size distribution. The average zeta potential values indicate that the SDBS-GnP, SDS-GnP, and GA-GnP combinations have good stability after 72 h. The freezing experiment is performed at − 7 °C cooling bath temperature in a spherical container and reveals that the surfactants have a significant influence on the supercooling rate and freezing time. The maximum reduction of 92.16% and 84.20% is observed for GA-GnP and SDBS-GnP in the supercooling rate, respectively. The prepared NFPCM can be incorporated in the CTS system owing to its enhanced thermal transport properties to increase the energy-saving potential. Also, the reduction of supercooling facilitates the chiller to operate at higher temperatures.
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Data availability
The authors declare that all the data supporting the findings of this study are available within the article.
Abbreviations
- T :
-
Temperature/°C
- t :
-
Time/s
- f :
-
Freezing
- n :
-
Supercooling
- \(\dot{\mathrm{q }}\) :
-
Average surface heat flux/W m−2
- m :
-
Mass of PCM/kg
- λ :
-
Latent heat/KJ kg−1
- S :
-
Uncertainty
- logg:
-
Data logger
- ini:
-
Initial
- fin:
-
Final
- DI :
-
Deionized
- BF:
-
Base fluid
- GA:
-
Gum arabic
- PCM :
-
Phase change material
- DSC :
-
Differential scanning calorimetry
- RTD :
-
Resistance temperature detector
- PUF:
-
Polyurethane foam
- TEM :
-
Transmission electron microscope
- HTF :
-
Heat transfer fluid
- GnP :
-
Graphene nanoplatelet
- SDS:
-
Sodium dodecyl sulfate
- NPE:
-
Nonylphenolethoxylate
- PVP:
-
Polyvinylpyrrolidone
- HRSEM:
-
High-resolution scanning electron microscopy
- MWCNT:
-
Multi-wall carbon nanotubes
- CTES :
-
Cool thermal energy storage
- LTES:
-
Latent heat thermal energy storage
- LDPE :
-
Low-density polyethylene
- PTDC :
-
Proportionate temperature differential controller
- NFPCM :
-
Nanofluid phase change material
- SDBS:
-
Sodium dodecylbenzene sulfonate
- CTAB:
-
Cetyltrimethylammonium bromide
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Acknowledgements
The authors wish to thank the Department of Mechanical Engineering, Pondicherry Engineering College, Puducherry for the support and encouragement for carrying out this research work. The authors also like to thank the Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai for their motivation and support.
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The authors state that they did not receive any specific grant from the funding agencies in the public, commercial, or not-for-profit sectors.
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PS conducted the experiments in various surrounding conditions and consolidate the results. AK and PS interrupt the physical scenario behind the improvement of the thermophysical properties of the Phase Change Materials (PCM).
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Sundaram, P., Kalaisselvane, A. Effect of different additives on freezing characteristics and stability of GnP-aqueous-based PCM for cold thermal storage. J Therm Anal Calorim 147, 8033–8045 (2022). https://doi.org/10.1007/s10973-021-11056-y
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DOI: https://doi.org/10.1007/s10973-021-11056-y