以水和结晶醋酸钠作换热和蓄热介质，对内纵翅片套管相变蓄热器的充、放热特性进行了实验。实验结果表明：水流速增加，充、放热速度增加；进口水温升高，充热速度越快，放热越慢。此外，综合实验数据得到了两个有关蓄热器性能的关系式。 Water and crystalline sodium acetate were used as heat transfer and heat storage mediums, and the experiments were carried out on the charge and discharge characteristics of the internal longitudinal finned phase change heat accumulators. The experimental results show that: water flow rate increases, charging and exothermic rate increases; inlet water temperature increases, the faster the heating rate, the slower the heat release. In addition, the comprehensive experimental data obtained two related to the performance of the heat exchanger.