热力发电2025，Vol.54Issue(3)：33-42,10.DOI:10.19666/j.rlfd.202407182
基于孔隙尺度的双层级联式胶囊型复合相变储能材料热特性分析
Thermal characteristics analysis of double-layer cascaded capsule composite phase change energy storage material based on pore scale
摘要
Abstract
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.关键词
相变储能材料/胶囊型/孔隙尺度/大涡模拟/堆积床Key words
phase change material for energy storage/capsule type/pore scale/large eddy simulation/stacking bed引用本文复制引用
李明轩,姜霖松,索少一,杨新乐,解茂昭..基于孔隙尺度的双层级联式胶囊型复合相变储能材料热特性分析[J].热力发电,2025,54(3):33-42,10.基金项目
国家自然科学基金青年基金(12302374,12202165) （12302374,12202165）
辽宁省教育厅基本科研项目(JYTQN2023201) National Natural Science Foundation of China(12302374,12202165) （JYTQN2023201）
Basic Research Projects of Liaoning Provincial Department of Education(JYTQN2023201) （JYTQN2023201）
