Thermal Conductivity and Charging & Discharging Characteristics of a Thermal Energy Storage System Blended with Al₂O₃ Nanoparticles

Abstract:

Phase change material (PCM) based thermal energy storage systems (TES) are mandatoryto utilize solar energy efficiently and effectively. Paraffin is widely used phase change material and the only disadvantage with paraffin is that its poor thermal conductivity. The objective of the study is to increase the thermal conductivity of the PCM based TES. The thermal conductivity of the paraffin PCM blended with Al₂O₃ nanoparticle with different proportions was determined both experimentally and analytically for solid and liquid states. The different volume concentrations of Al₂O₃ nanoparticle blended with paraffin are 0.01, 0.02, 0.03, 0.04, 0.05 and 0.1. The charging and discharging characteristics of the thermal energy storage system was also determined for the above mentioned different volumetric concentrations of nanoparticles blended with paraffin using an experimental set up fabricated. It was found that, Al₂O₃ nanoparticle can be blended to maximum of 0.1% volume concentration with n-tricosane paraffin without any agglomeration. The significant improvement in thermal conductivity, charging & discharging characteristics of the thermal energy storage system was observed corresponding to this proportion of blending.

• Periodical: Nano Hybrids and Composites (Volume 17)
• Pages: 10-17
• DOI: https://doi.org/10.4028/www.scientific.net/NHC.17.10
• Online since: August 2017
• Authors: K. Karunamurthy*, M. Rachit Rajesh, B. Vijaypal, Ayush Kumar
• Keywords: Nanoparticle, Phase Change Material, Thermal Conductivity, Thermal Energy Storage

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