By choosing Ba(OH)2·8H2O as phase change heat storage material and taking heat pipe as the heat transfer element

a heat pipe phase change energy storage system was designed.The heat storage performance of the system was explored by changing the experimental conditions.The results show that:The thermal homogeneity of the heat pipe in the regenerator is good.With an increase in the heating fluid temperature and flow rate

the temperature of the phase change material increases and the phase transformation time decreases.With an decrease in inlet temperature and inlet flow

the temperature difference of inlet and outlet fluid increases.When the inlet temperature decreases and the inlet flow increases

the heat storage efficiency decreases.When the inlet temperature is 18 ℃

the heat storage efficiency reaches up to 89.2%and the highest outlet temperature is 49.5 ℃.When the inlet flow is 0.008 m3/h

the heat storage efficiency is as high as 87.5% and the highest outlet temperature is 47.4 ℃.