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Thermal characteristics analysis of double-layer cascaded capsule composite phase change energy storage material based on pore scale
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Mingxuan LI1, Linsong JIANG1, Shaoyi SUO1, Xinle YANG1, Maozhao XIE2
Thermal Power Generation | 2025, 54(3) : 33 - 42
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Thermal Power Generation | 2025, 54(3): 33-42
• Energy storage technology •
Thermal characteristics analysis of double-layer cascaded capsule composite phase change energy storage material based on pore scale
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Mingxuan LI1, Linsong JIANG1, Shaoyi SUO1, Xinle YANG1, Maozhao XIE2
Affiliations
  • 1.School of Mechanical Engineering, Liaoning Technical University, Fuxin 123099, China
  • 2.School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, China
Published: 2025-03-25 doi: 10.19666/j.rlfd.202407182
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The development of efficient energy storage technologies is critical as global energy demand rises and environmental issues become increasingly serious. Large eddy simulation is employed to model the phase change heat storage process in a packed bed system consisting of a double-layer cascade capsule-stacked structure based on the pore scale. The temperature, streamlines, and vortex distributions of phase change materials (PCMs) with various melting points and physical properties are investigated within the structure. The thermal characteristics of the capsule-type stacked structure are analyzed at different entrance velocities, and the simulation results are validated by experimental data. The simulation results demonstrate that, the interstitial flow and vorticity fields of the stacked structure exhibit significant dynamic characteristics during heat storage. At the pore scale, the phase transition induces streamline bending, vortex formation, and the increase of local velocity. After the phase transition, the flow field and vorticity tends to stabilize, with low-vorticity regions occupying most of the area. Eventually, the vortex structure is analyzed by the Q-criterion, revealing that the high-intensity vortices are primarily concentrated near the tank wall.

phase change material for energy storage  /  capsule type  /  pore scale  /  large eddy simulation  /  stacking bed
Mingxuan LI, Linsong JIANG, Shaoyi SUO, Xinle YANG, Maozhao XIE. Thermal characteristics analysis of double-layer cascaded capsule composite phase change energy storage material based on pore scale[J]. Thermal Power Generation, 2025 , 54 (3) : 33 -42 . DOI: 10.19666/j.rlfd.202407182
Funding
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  • National Natural Science Foundation of China(12302374; 12202165)
  • Basic Research Projects of Liaoning Provincial Department of Education(JYTQN2023201)
Appendix
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Year 2025 volume 54 Issue 3
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Article Info
doi: 10.19666/j.rlfd.202407182
  • Receive Date：2024-07-24
  • Online Date：2026-03-06
  • Published：2025-03-25
Article Data
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  • Received：2024-07-24
Funding
National Natural Science Foundation of China(12302374; 12202165)
Basic Research Projects of Liaoning Provincial Department of Education(JYTQN2023201)
Affiliations
    1.School of Mechanical Engineering, Liaoning Technical University, Fuxin 123099, China
    2.School of Energy & Power Engineering, Dalian University of Technology, Dalian 116024, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202407182
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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