Stability analysis of TiO2–Ag nanocomposite particles dispersed paraffin wax as energy storage material for solar thermal systems

Prabhu. B and ValanArasu. A

Renewable Energy, 2020, vol. 152, issue C, 358-367

Abstract: Thermal energy storage using phase change material (PCM) gains momentum as it improves the efficiency of the solar energy thermal systems. The low thermal conductivity of PCMs can be enhanced by dispersing nanocomposite particles in PCM to enhance the performance of energy storage systems. This paper discusses the effect of ball milling on the synthesized TiO2–Ag nanocomposite particles and analyses the stability of the paraffinwax embedded with TiO2–Ag nanocomposite particles with various mass concentrations of nanocomposite particles and surfactant. The characterization studies showed that ball milling affects the physical bond between TiO2–Ag nanocomposites. Next, nanocomposite particles dispersed paraffinwax with and without surfactants SDBS, SDS and SSL were prepared. The suitable surfactant SDS and its proper mass concentration ratio of nanocomposite as 1:0.25 were identified by physical settlement study. Accelerated thermal cycling process was carried out on TiO2–Ag nanocomposite particles dispersed paraffinwax with and without SDS. Uniform dispersion of nanocomposite particles in paraffin wax was observed for the cycled samples with SDS using SEM. The improved stability, uniform dispersion of TiO2–Ag nanocomposite particles in paraffinwax and improved thermal properties have proved that this novel PCM could be used as a promising energy storage material in solar energy storage applications.

Keywords: Paraffin wax; TiO2–Ag nanocomposite; Ball milling; Stability; Solar energy storage (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:152:y:2020:i:c:p:358-367

DOI: 10.1016/j.renene.2020.01.043

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