Whether the heating storing packed bed has high efficient heat charge and discharge capability is the key point in solar energy thermal power generation technology.According to energy balance between the high temperature regenerative ball and the heat transfer fluid

the exothermic process model of high temperature heat storing packed bed was established

taking the variations of phase change material(PCM)density and heat transfer coefficient between the heat transfer fluid and heat storage unit into account.The exothermic process of the regenerative packed bed was numerically simulated and the influences of several parameters on the PCM's temperature and heat transfer fluid were discussed

such as the heat transfer fluid velocity

initial temperature of the PCM

heat storage unit radius and accumulated heat packed bed porosity.The results show that

the faster the heat transfer fluid flow rate

the greater the heat release rate.The porosity goes against the heat storage unit's heat dissipation

but is good for piling bed's overall heat release and energy storage.The PCM's initial temperature has obvious influence only on sensible heat releasing stage.Reducing the PCM's initial temperature can shorten the overall heat release time.The smaller the radius of the heat storage unit

the faster the heat release rate and the larger the heat storage amount.