Abstract: Phase change heat storage is one of the most important energy-saving technologies. The research of heat transfer coefficient and heat release rate is helpful to improve the thermal efficiency and it also play a significant role in applying of phase change heat storage system. Focused on the heat release property of the staggered tube bank with paraffin thermal storage system, we measured the heat transfer coefficient and the heat release rate, and then analyzed influencing factors in terms of the number of tube rows, wind speed and other factors. The results showed that under the conditions that the wind speed was less than 3 m/s, and the temperatures varied from 20℃ to 55℃, the testing results of heat transfer coefficient were in good correspondence with the theoretical values; The heat release rate reduced with higher wind speed, and increased with the rise of the number of tube rows, which could reach up to 83%. The heat efficiency could be improved by 62% at most by prolonging heat exchange time.