Preparation and Properties of Nanoparticle-enhanced Composite Phase Change Material with Ceramic Porous Media

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Date

May-18

Authors

Li, Runfeng
Zhou, Yang
Duan, Xili

Journal Title

Journal ISSN

Volume Title

Publisher

CSME-SCGM

Abstract

Nanoparticle-enhanced tailing-paraffin composite phase change material (NCPCM) is fabricated by spontaneous melt infiltration. Industrial waste-iron tailing is used as raw material to prepare ceramic porous carrier with a foam-gel casting method. By adjusting the fabrication parameters, optimal NCPCM properties are obtained with paraffin content of 70%~88% and thermal conductivity of 0.351~0.490 W/(m·K), which is nearly 200% the thermal conductivity of paraffin wax. After 25 melting/solidification cycles, the nanoparticles remain well dispersion with overall stability in the composite phase change material, and the thermal conductivity slightly decreased from 0.349 to 0.317 W/ m·K. With multiple melting and solidification cycles, a low weight loss of 2.3~7.8 wt.% is demonstrated. The strength of ceramic frame is found to have a direct effect on the weight loss. Compared with exisiting nanoparticle-enhanced phase change material, the new NCPCM shows significantly improved thermal conductivity and better nanoparticle stability due to its ability to prevent nanoparticles from disposition.

Description

Paper presented at 2018 Canadian Society of Mechanical Engineers International Congress, 27-30 May 2018.

Keywords

Heat Transfer, Nanoparticle, Phase change materials, Ceramic porous media, Thermophysical properties, Dispersion

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