Abstract
Solar energy is the most plentiful renewable energy source that has the capability to keep up with the growing demand. When the sun’s energy is not available, thermal energy storage (TES) using phase change material (PCM) is a promising technique for storage and utilization. However, PCM’s low thermal conductivity may limit its use. The use of nanomaterials to enhance the thermal conductivity is one of the prominent solutions to overcome this issue. This research work reports that graphene nanoparticles (0.1%, 0.3%, 0.5%, 0.7% and 1% mass) enhanced paraffin wax (PW) to improve the thermophysical properties and transmittance capability. Thermogravimetric analyzer (TGA), differential scanning calorimeter (DSC), Fourier transform infrared spectroscopy (FTIR) and ultra-violet visible spectroscope (UV–VIS) were used for the characterization of the base PCM and nano-enhanced phase change materials (NePCM) composites. A significant improvement of 110% in thermal conductivity was obtained at 0.7% mass ratio compared to base PW without compromising the prepared composites’ latent heat storage (LHS) capacity. TGA and FTIR outcomes demonstrated excellent thermal and chemical stability, respectively. To check the thermal reliability of composite, the PW and nanocomposite were subjected to repeated thermal cycling. The outcome evidence that the NePCM composite had consistent thermal energy storage properties even after repeated thermal cycles. The composite’s light transmission was drastically lowered by 56.34% (PW/Gr-0.5) compared to base PW, resulting in PW/Gr composite has better thermal reliability in relation to thermal conductivity and LHS than base PCM, which can be used specifically in photovoltaic thermal systems and TES.
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Abbreviations
- C.B.:
-
Carbon black
- DSC:
-
Differential scanning calorimeter
- EDX:
-
Energy dispersive X-ray spectroscopy
- E.T.:
-
Electron transport
- FESEM:
-
Field emission scanning electron microscopy
- FT-IR:
-
Fourier transform infrared spectroscopy
- G:
-
Graphene
- LHS:
-
Latent heat storage
- MWCNT:
-
Multiwall carbon nanotubes
- NePCM:
-
Nano-enhanced phase change materials
- PCM:
-
Phase change materials
- PV:
-
Photovoltaics
- PVT:
-
Photovoltaic thermal
- PW:
-
Paraffin wax
- PW/Gr:
-
Paraffin wax–graphene composite
- PT:
-
Phonon transport
- SDBS:
-
Sodium dodecyl benzene sulfate
- SWCNT:
-
Single-wall carbon nanotube
- TGA:
-
Thermal gravimetric analyzer
- TiO2 :
-
Titanium Oxide
- T.P.:
-
Thermophysical properties
- UV–VIS:
-
Ultra-violet visible spectroscopy
- TES:
-
Thermal energy storage
- α :
-
Absorbance
- η :
-
Efficiency
- µ :
-
Micron
- ɸ :
-
Concentration ratio
- ⍴ :
-
Density Kg m-3
- PWG0.1:
-
Paraffin wax with 0.1% graphene
- PWG0.3:
-
Paraffin wax with 0.3% graphene
- PWG0.5:
-
Paraffin wax with 0.5% graphene
- PWG0.7:
-
Paraffin wax with 0.7% graphene
- PWG1:
-
Paraffin wax with 1% graphene
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Acknowledgements
The authors would like to thank Universiti Malaysia Pahang (UMP) for the financial support under grant RDU233002 RDU192208 and RDU210351. The authors are also thankful to the Deanship of Scientific Research at Najran University for funding this work under the Research Groups Funding program grant code (NU/RG/SERC/11/7) and Sunway University through Sunway University International Research Network Grant Scheme 2.0 (IRNGS2.0) (STRIRNGS- SET-RCNMET-01-2021).
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IAL involved in data curation, investigation, formal analysis, and writing—original draft. AKP involved in conceptualization, methodology, formal analysis, validation, supervision, and project administration. MS involved in validation, review and editing, methodology, supervision, and project administration. BA involved in review and editing and methodology. KK involved in writing—review and editing and supervision. KS involved in validation and writing—review and editing. VVT involved in methodology and validation.
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Laghari, I.A., Pandey, A.K., Samykano, M. et al. Thermal energy harvesting of highly conductive graphene-enhanced paraffin phase change material. J Therm Anal Calorim 148, 9391–9402 (2023). https://doi.org/10.1007/s10973-023-12336-5
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DOI: https://doi.org/10.1007/s10973-023-12336-5