The goal of this study is to investigate the effect of key design parameters on the thermal performance of the packed bed heat storage device by numerical calculation. A one-dimensional, non-equilibrium packed bed latent heat storage mathematical model was established and the applicability of the model was verified. The results demonstrate that the inlet temperature of the heat transfer fluid (HTF) had the greatest influence on each index. When the inlet temperature increased from 333 K to 363 K, exergy destruction increased threefold, effective heat storage time decreased by 67%, effective heat storage increased by 38%, and exergy efficiency decreased by 11%. The decrease of the capsule diameter had a positive effect on each evaluation index. According to the sensitivity analysis, the order of importance of each parameter within their variation range was HTF inlet temperature, HTF flow rate, PCM capsule size and PCM initial temperature.

这项研究的目的是通过数值计算来研究关键设计参数对填充床储热装置热性能的影响。建立了一维非平衡填充床潜热存储数学模型，并验证了该模型的适用性。结果表明，传热流体（HTF）的入口温度对每个指标的影响最大。当入口温度从333 K增加到363 K时，火用破坏增加了三倍，有效储热时间减少了67％，有效储热增加了38％，火用效率降低了11％。胶囊直径的减小对每个评价指标都有积极影响。根据敏感性分析，