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Magnetically-accelerated large-capacity solar-thermal energy storage within high-temperature phase-change materials

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Abstract

Solar-thermal energy storage within phase change materials (PCMs) can overcome solar radiation intermittency to enable continuous operation of many important heating-related processes. The energy harvesting performance of current storage systems, however, is limited by the low thermal conductivity of PCMs, and the thermal conductivity enhancement of high-temperature molten salt-based PCMs is challenging and often leads to reduced energy storage capacity. Here, we demonstrate that magnetically moving mesh-structured solar absorbers within a molten salt along the solar illumination path significantly accelerates solar-thermal energy storage rates while maintaining 100% storage capacity. Such a magnetically-accelerated movable charging strategy increases the latent heat solar-thermal energy harvesting rate by 107%, and also supports large-area charging and batch-to-batch solar-thermal storage. The movable charging system can be readily integrated with heat exchanging systems to serve as energy sources for water and space heating by using abundant clean solar-thermal energy.

Graphical abstract: Magnetically-accelerated large-capacity solar-thermal energy storage within high-temperature phase-change materials

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Publication details

The article was received on 17 Feb 2019, accepted on 15 Mar 2019 and first published on 21 Mar 2019


Article type: Paper
DOI: 10.1039/C9EE00542K
Citation: Energy Environ. Sci., 2019, Advance Article

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    Magnetically-accelerated large-capacity solar-thermal energy storage within high-temperature phase-change materials

    P. Tao, C. Chang, Z. Tong, H. Bao, C. Song, J. Wu, W. Shang and T. Deng, Energy Environ. Sci., 2019, Advance Article , DOI: 10.1039/C9EE00542K

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