矩形阵列管封装式相变蓄热装置放热性能试验研究

Experimental Study on Heat-releasing Property of Rectangular Array Tube-encapsulated Heat Storage Device

设计出一套矩形阵列管封装式相变蓄热装置,设计并搭建相变蓄热系统试验台,采用相变材料CH_3COONa·3H_2O对其进行放热性能试验研究.结果表明:相同温差下冷流体流量越大,蓄热装置的传热系数也越大,且随放热过程进行下降速率也越缓慢.流量为500L/h,温差为(75℃-50℃)的传热系数明显比温差为(68℃-40℃)的传热系数高,但流量为300L/h和100L/h时,温差为(75℃-50℃)的传热系数却比温差为(68℃-40℃)的传热系数低.

A rectangular array tube-encapsulated phase change heat storage device was designed and a phase change heat storage system was built.Experiment was carried out by using CH_3COONa·3h_2O as heat storage material to study its heat release property.The experimental results indicated that under the same temperature difference,the greater the cold fluid flow rate is,the greater the heat transfer coefficient of the heat storage device is,and the slower the decline rate with the heat release process is.When the flow rate is 500L/h,the heat transfer coefficient of（75 ℃-50 ℃）is higher than that of（68℃-40℃）;but when the flow rate is 300 L/h and 100 L/h,the heat transfer coefficient of（75 ℃-50 ℃）is lower than that of（68 ℃-40 ℃）.