In this paper, an energy storage interconnected heat pump system is proposed. Numerical simulation is performed to investigate the melting and solidification processes of paraffin in a spherical heat storage unit. The influences of the spherical wall temperature, spherical heat storage unit size, and initial temperature of the phase-change material during the melting process, as well as the influence of the spherical wall temperature on the solidification process, were analyzed. The results indicated that the size of the spherical heat storage unit had the most dominant influence on the melting and solidification processes. The overall melting time was less than the overall solidification time at the same temperature difference. In the melting process, convective heat transfer invariably occurs between the liquid phase and the spherical wall, which accelerates the melting process.

中文翻译：

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储能互连热泵系统相变装置中的熔化和凝固过程分析

本文提出了一种储能互连热泵系统。进行数值模拟以研究球形储热单元中石蜡的熔化和固化过程。分析了球形壁温度，球形储热单元尺寸和相变材料在熔化过程中的初始温度的影响，以及球形壁温度对凝固过程的影响。结果表明，球形储热单元的尺寸对熔化和凝固过程影响最大。在相同温度差下，总熔化时间小于总固化时间。在熔化过程中，对流传热总是发生在液相和球形壁之间，