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Numerical analysis of solidification of PCM in a closed vertical cylinder for thermal energy storage applications
Heat and Mass Transfer ( IF 2.2 ) Pub Date : 2020-07-14 , DOI: 10.1007/s00231-020-02911-z
Burak Izgi , Mevlut Arslan

The solidification dynamics of cylindrical encapsulated PCM have been analyzed under convective boundary conditions that relate to thermal energy storage systems. A three dimensional, transient CFD model has been solved for examinations. Besides the widely used conduction model of solidification, in this study, the effect of natural convection within the liquid layer has been considered in the numerical model. The effects of parameters such as the initial superheating temperature, the encapsulation size, and the heat transfer coefficient at the outer surface of the capsule have been examined in terms of solidification dynamics and extracted energy during the phase change process. It was found that while the diameter of encapsulation significantly affects the solidification and the energy extraction times, the effect of encapsulation height on the solidification and the energy extraction times are not notable.



中文翻译:

储热应用中垂直立式圆柱体中PCM凝固的数值分析

在与热能存储系统有关的对流边界条件下,已经分析了圆柱形封装的PCM的凝固动力学。解决了三维瞬态CFD模型以进行检查。除了广泛使用的凝固传导模型外,在本研究中,数值模型还考虑了液体层内自然对流的影响。已经根据相变过程中的凝固动力学和提取的能量检查了参数的影响,例如初始过热温度,封装尺寸和胶囊外表面的传热系数。已经发现,虽然包封的直径显着影响固化和能量提取时间,

更新日期:2020-09-10
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