RESEARCH ON THERMAL STRATIFICATION CHARACTERISTICS OF PIT-TYPE THERMAL ENERGY STORAGE WATER BODY WITH BUILT-IN PARTITIONS

Huang Kailiang; Dai Hanshu; Feng Guohui; Li Ainong; Meng Xianghua

doi:10.19912/j.0254-0096.tynxb.2024-1547

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 158-166. DOI: 10.19912/j.0254-0096.tynxb.2024-1547

RESEARCH ON THERMAL STRATIFICATION CHARACTERISTICS OF PIT-TYPE THERMAL ENERGY STORAGE WATER BODY WITH BUILT-IN PARTITIONS

Huang Kailiang, Dai Hanshu, Feng Guohui, Li Ainong, Meng Xianghua

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Abstract

In order to improve the temperature stratification characteristics of the pit thermal energy storage water body, the method of built-in two partitions is proposed to improve the temperature stratification characteristics, and the operating parameters are optimized to further improve the thermal performance of the water body and reduce the heat loss. The effects of inlet flow rate, inlet temperature, height and location of the partitions on the stratification characteristics of water temperature were studied by numerical simulation, and the variation trend of thermal performance was analyzed based on the Richardson number and the thermocline thickness. The results show that when the volume of the pit thermal energy storage water body is 10000 m³, the height of the partitions is 5 m, and the partitions are located 13 m from the inlet and 5 m from the outlet, the thickness of the thermocline is reduced by 22.9%, and the Richardson number Ri is increased by 53.2%. The water body has the best temperature stratification characteristics. The built-in partition can significantly optimize water temperature distribution and improve energy storage efficiency.

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thermal energy storage / thermal stratification / thermal properties / numerical simulation / optimised design / engineering feasibility

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Huang Kailiang, Dai Hanshu, Feng Guohui, Li Ainong, Meng Xianghua. RESEARCH ON THERMAL STRATIFICATION CHARACTERISTICS OF PIT-TYPE THERMAL ENERGY STORAGE WATER BODY WITH BUILT-IN PARTITIONS[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 158-166 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1547

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