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Thermal performance and economic evaluation of NaCl–CaCl2 eutectic salt for high-temperature thermal energy storage

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  • Tian, Heqing
  • Wang, Weilong
  • Ding, Jing
  • Wei, Xiaolan

Abstract

Molten salts have been widely used as a kind of high-temperature thermal energy storage materials taking its advantage of high heat storage density and good stability. In this paper, the eutectic chloride salt (NaCl–CaCl2, 52-48mol.%) was prepared by a statically mixing method assessing its thermal energy storage performance for concentrating solar power (CSP) plants. The thermal properties were all determined experimentally by thermal analysis methods including melting temperature, latent heat, specific heat capacity, density, thermal expansion coefficient, thermal diffusivity and thermal conductivity. The measurement results showed that the eutectic salt has a suitable melting temperature of 512.8 °C and high latent heat of 178.4 J/g. Moreover, it exhibited an excellent thermal stability below 858 °C with no significant mass changes. Both high heat storage density and low cost price promoted its potential application for high-temperature thermal energy storage.

Suggested Citation

  • Tian, Heqing & Wang, Weilong & Ding, Jing & Wei, Xiaolan, 2021. "Thermal performance and economic evaluation of NaCl–CaCl2 eutectic salt for high-temperature thermal energy storage," Energy, Elsevier, vol. 227(C).
    • Handle: RePEc:eee:energy:v:227:y:2021:i:c:s0360544221006617
    DOI: 10.1016/j.energy.2021.120412
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    1. Naveed Hassan & Manickam Minakshi & Willey Yun Hsien Liew & Amun Amri & Zhong-Tao Jiang, 2023. "Thermal Characterization of Binary Calcium-Lithium Chloride Salts for Thermal Energy Storage at High Temperature," Energies, MDPI, vol. 16(12), pages 1-16, June.
    2. Elfeky, Karem Elsayed & Mohammed, Abubakar Gambo & Wang, Qiuwang, 2022. "Thermo-economic evaluation of PCM layer thickness change on the performance of the hybrid heat storage tank for concentrating solar power plants," Energy, Elsevier, vol. 253(C).
    3. Xiaolan Wei & Dandan Chen & Shule Liu & Weilong Wang & Jing Ding & Jianfeng Lu, 2022. "Structure and Thermophysical Properties of Molten Calcium-Containing Multi-Component Chlorides by Using Specific BMH Potential Parameters," Energies, MDPI, vol. 15(23), pages 1-14, November.

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