A packed bed is a good heat-storage method because of its simple structure, low cost, and good heat-transfer performance. Packed beds generally have a thermocline temperature distribution. This study analyzes a molten-salt thermocline storage system packed with a sensible heat material based on simulation and experimental research. The relationships between heat transfer and the characteristic parameters of the filling material, charging time, and initial conditions are obtained. Investigation results show that the thickness of the thermocline layer reduces with the increase in volume heat capacity but increases with time. The equivalent diameter of particles almost has zero effect on the thermocline thickness, and porosity has an indirect impact on the thickness of the thermocline layer but influences the movement speed of the thermocline. The maximum temperature difference between the fluid and solid decreases, but the range of temperature differences increases with time.

中文翻译：

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一种熔盐温跃层填充床储存系统的传热性能

填充床结构简单、成本低、传热性能好，是一种很好的蓄热方式。填充床通常具有温跃层温度分布。本研究基于模拟和实验研究分析了装有显热材料的熔盐温跃层存储系统。得到了传热与填料特性参数、充电时间和初始条件之间的关系。研究结果表明，温跃层的厚度随着体积热容量的增加而减小，但随着时间的推移而增加。颗粒当量直径对跃跃层厚度的影响几乎为零，孔隙度对跃跃层厚度有间接影响，但影响跃跃层的运动速度。