EXPERIMENTAL STUDY ON THERMOPHYSICAL PERFORMANCE ENHANCEMENT OF PARAFFIN PHASE CHANGE MATERIALS WITH HYBRID NANOPARTICLES

Gao Hongyuan; Huang Chao; Wei Gaosheng; Du Xiaoze

doi:10.19912/j.0254-0096.tynxb.2024-0311

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (7) : 483-490. DOI: 10.19912/j.0254-0096.tynxb.2024-0311

Special Topics of Academic Papers at the 77th Annual Meeting of the China Association for Science and Technology

EXPERIMENTAL STUDY ON THERMOPHYSICAL PERFORMANCE ENHANCEMENT OF PARAFFIN PHASE CHANGE MATERIALS WITH HYBRID NANOPARTICLES

Gao Hongyuan, Huang Chao, Wei Gaosheng, Du Xiaoze

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Abstract

Paraffin waxes have great application potential in the field of low-temperature solar energy storage technology due to their wide phase transition temperature range, moderate latent heat and good chemical compatibility. In order to enhance the heat transfer/storage performance of paraffin wax, this paper gives thermophysical property enhancement study of nanocomposite phase change materials NCPCMs） dispersed by Al₂O₃, TiO₂ nanoparticles, carbon nano-fiber （CNF）, Al₂O₃+TiO₂ and Al₂O₃+CNF in paraffin. The effects of adding mono and hybrid particles on the thermophysical properties of paraffin are experimentally investigated. The samples of NCPCMs with different concentrations are successfully prepared with Span80 as surfactant. The differential scanning calorimeter and transient hot-wire method are used to measure the thermophysical properties of the samples. A scanning electron microscopy and a Fourier transform infrared spectroscopy are used to characterize the surface morphologies and chemical structures of the prepared samples. The results show that Al₂O_3, TiO₂ and CNF nanoparticles have uniformly dispersed in both mono and hybrid NCPCMs without any chemical reaction. The latent heat of paraffin decreases with the addition of Al₂O₃, TiO₂ and CNF nanoparticles in both mono and hybrid NCPCMs slightly. Compared with pure paraffin, the thermal conductivity of Al₂O₃+CNF composite with mass fraction of 1.0% increased by 36.79%, and the specific heat of liquid phase increased by 32.07%. As a conclusion, the hybrid nanoparticles of Al₂O₃+CNF shows significant potential for thermophysical property enhancement of phase change materials.

Key words

nanoparticles / paraffin waxes / heat storage / phase change materials / solar energy

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Gao Hongyuan, Huang Chao, Wei Gaosheng, Du Xiaoze. EXPERIMENTAL STUDY ON THERMOPHYSICAL PERFORMANCE ENHANCEMENT OF PARAFFIN PHASE CHANGE MATERIALS WITH HYBRID NANOPARTICLES[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 483-490 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0311

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