径向多层堆积的潜热填充床的热性能分析

In this paper, a spherical heat storage capsules packing structure with radial multilayer phase transition temperature gradient distribution is proposed based on the medium-high temperature packed-bed latent heat storage experimental system set up in the laboratory, and its influence on charging/discharging time and efficiency of packed-bed is simulated and analyzed. Three different combinations of radial phase transition temperatures are compared with the conventional single structure. The results show that, under the same heat storage, radial multilayer phase transition temperature gradient distribution can effectively increase the charging/discharging rate and prolong the effective heat output time. The radial three-layer structure has an effective heat flow time of 9654 s and a heat release power of 762.8 W, which is superior to other structures and has the best comprehensive thermal performance.