Issue 9, 2014

A solar-thermal energy harvesting scheme: enhanced heat capacity of molten HITEC salt mixed with Sn/SiOx core–shell nanoparticles

Abstract

We demonstrated enhanced solar-thermal storage by releasing the latent heat of Sn/SiOx core–shell nanoparticles (NPs) embedded in a eutectic salt. The microstructures and chemical compositions of Sn/SiOx core–shell NPs were characterized. In situ heating XRD provides dynamic crystalline information about the Sn/SiOx core–shell NPs during cyclic heating processes. The latent heat of ∼29 J g−1 for Sn/SiOx core–shell NPs was measured, and 30% enhanced heat capacity was achieved from 1.57 to 2.03 J g−1 K−1 for the HITEC solar salt without and with, respectively, a mixture of 5% Sn/SiOx core–shell NPs. In addition, an endurance cycle test was performed to prove a stable operation in practical applications. The approach provides a method to enhance energy storage in solar-thermal power plants.

Graphical abstract: A solar-thermal energy harvesting scheme: enhanced heat capacity of molten HITEC salt mixed with Sn/SiOx core–shell nanoparticles

Supplementary files

Article information

Article type
Communication
Submitted
24 Dec 2013
Accepted
06 Feb 2014
First published
06 Feb 2014

Nanoscale, 2014,6, 4555-4559

A solar-thermal energy harvesting scheme: enhanced heat capacity of molten HITEC salt mixed with Sn/SiOx core–shell nanoparticles

C. Lai, W. Chang, W. Hu, Z. M. Wang, M. Lu and Y. Chueh, Nanoscale, 2014, 6, 4555 DOI: 10.1039/C3NR06810B

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