NUMERICAL INVESTIGATION ON THE THERMAL PERFORMANCE OF A CASCADED LATENT HEAT THERMAL ENERGY STORAGE | Zendy

Zhirong Liao | Zendy; Pengda Li | Zendy; Chao Xu | Zendy; Xing Jü | Zendy; Feng Ye | Zendy

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NUMERICAL INVESTIGATION ON THE THERMAL PERFORMANCE OF A CASCADED LATENT HEAT THERMAL ENERGY STORAGE

Author(s) -

Zhirong Liao,

Pengda Li,

Chao Xu,

Xing Jü,

Feng Ye

Publication year - 2020

Publication title -

frontiers in heat and mass transfer

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 18

ISSN - 2151-8629

DOI - 10.5098/hmt.15.10

Subject(s) - thermal fluids , thermal , thermal energy storage , frontier , heat transfer , thermal energy , latent heat , materials science , thermodynamics , nuclear engineering , mechanical engineering , process engineering , engineering , thermal resistance , political science , physics , law

This study numerically investigates the charging and discharging processes of a three-stages cascaded latent heat thermal energy storage unit using three molten salts as the phase change materials (PCMs). Each stage of the unit is a vertical shell-and-tube heat exchanger, whose shell side is filled with the PCM and air. The liquid fractions, temperatures, and accumulated thermal energy of the PCMs during the fully charging and discharging processes, as well as the effects of the HTF inlet temperature, are analyzed. The results show that lower melting temperature of the PCM causes faster charging rate and more released heat in the cascaded LHTES system. Compared with the non-cascaded LHTES systems, the cascaded LHTES systems can possess better flexibility via the selection of the PCMs.

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