本文在对目前常用冰蓄冷设备优缺点进行分析比较的基础上，提出圆形内带直肋片管封装式冰蓄冷单元。 对该结构蓄冷单元蓄冰、融冰传热过程进行了理论分析。建立了物理、数学模型，通过编程计算出求解结果。将求解结果与传热过程热力分析结合，得出所提出的物理模型、数学模型均能较好地反映实际蓄冰、融冰传热过程。证实了这种封装式冰蓄冷器具有较好的热工性能，可以在冰蓄冷空调系统中推广应用。应用数学模型求解时，结合了实际工程应用，从载冷剂入口温度、管径、水初始温度、肋片长度、肋片厚度以及肋片数等几个方面进行了多种工况的模拟计算。分析了各因素对蓄冰、融冰过程的影响，为结构优化提供理论基础。 对该结构蓄冷单元采用多种蓄冷介质时的能效与单一蓄冷介质时的能效进行比较。并且分析了载冷剂流速、载冷剂入口温度以及蓄放冷时间对蓄放冷率的影响。得出当采用多种蓄冷介质时，其能效要比单一蓄冷介质时提高很多的结论。 对该结构蓄冷单元蓄融冰过程进行了实验设计。

Based on the analysis and comparison of the performance and defect of the generally used ice-storage equipments, a new type of longitudinally pipe with inner fin ice-storage unit is proposed in this thesis. A series of thermodynamic analysis on charging and discharging thermal processes of this kind of ice-storage unit were done. The physical model and mathematical model of this new unit were expressed. Calculated the mathematical model through programs. Considering the mathematical result and the thermodynamic processes, we can obtain that the physical and mathematical model can better reflect the charging and discharging processes. It’s shown that this kind of ice-storage equipment has the advantages of other equipments, and can be applied widely in ice-storage air conditioners. Concerning the practical engineering application, the heat transfer fluid inlet temperatures, the radius of annulus, the initial temperature of water, the fin length, the fin thickness and the fin number were taken into account when using the above mathematical models of ice formation and melting processes. The influence of these factors to the characteristics during the freezing and melting processes of this new unit were analyzed separately, and a solid theoretical base has been founded for the configure optimization of this unit. Compared the energy efficient of the single PCM system with the energy efficient of the multiple PCMs system. And analyzed the influence of the heat transfer fluid flow speed, the heat transfer fluid inlet temperature and the time of charging-discharging to the characteristic during the charging-discharging processes. Analytical results show that the energy efficiency can be enhanced dramatically using multiple PCMs compared with single PCM system.