多管式相变储热单元的一体式拓扑优化及蓄放热性能分析  

Integrated topological optimization and heat storage and release performance analysis of multi-tube phase change heat storage units

作　　者：冯炎萍 赵明[1] 程瑞昌 FENG Yanping;ZHAO Ming;CHENG Ruichang(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《化学工程》2025年第4期18-23,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51306120)。

摘　　要：对多管式相变储热单元运用变密度的拓扑优化方法获得高效换热的翅片,研究内管数量的增加对拓扑优化翅片结构的影响,并对重构后的拓扑优化翅片进行蓄放热过程的分析。结果表明:单管和多管相变储热单元的拓扑优化翅片均成对称分布,单管单元的拓扑优化翅片出现一级分岔,而多管单元的拓扑优化翅片结构更为复杂。向外管方向延伸的翅片呈树杈型,且出现一级和二级分岔,而向内管方向延伸的翅片大多呈直肋型,少部分呈Y字型出现一级分岔,分岔的出现有利于热量的传递。对3管、9管、16管模型进行等体积占比的直肋的构建,在放热过程中3管、9管、16管拓扑模型的凝固时间比直肋模型分别减少87.24%、74.91%、78.29%;在蓄热过程中3管、9管、16管拓扑模型的熔化时间分别减少74.28%、75.04%、77.25%。证明拓扑优化翅片在蓄放热过程中能够提高相变储热单元的传热效率,且拓扑模型的温度场分布更均匀。Topological optimization method with variable density was applied to obtain efficient heat transfer fins for multi-tube phase change heat storage units.The influence of the increase of the number of inner tubes on the structure of the topological optimization fins was studied,and the heat storage and release process of the reconstructed topological optimization fins was analyzed.The results show that the topological optimization fins of single-tube and multi-tube phase change heat storage units are symmetrically distributed,and the topological optimization fins of single-tube units show primary bifurcation,while the structure of the multi-tube units is more complex.The fins extending towards the outer tube are tree-shaped and have primary and secondary bifurcation,while the fins extending towards the inner tube are mostly straight-rib-shaped,a small part of them are Y-shaped,and the emergence of bifurcations is conducive to heat transfer.The 3-tube,9-tube and 16-tube models were constructed with the same volume proportion of straight ribs.In the heat exothermic processes,the solidification time of the 3-tube,9-tube and 16-tube topological models is reduced by 87.24%,74.91%and 78.29%,respectively,compared with that of the straight-rib models.The melting time of the 3-tube,9-tube and 16-tube topological models is reduced by 74.28%,75.04%and 77.25%,respectively,which proves that the topological optimized fin can improve the heat transfer efficiency of the phase-change heat storage unit during heat storage and release,and the temperature field distribution of the topological model is more uniform.

关 键 词：多管 相变储热 拓扑优化 强化传热 数值模拟 

分 类 号：TK121[动力工程及工程热物理—工程热物理]