自然冷贮藏系统中一维动态蓄冷过程的初步研究

Preliminary study on one-dimensional dynamic cool storage in a preservation system with natural cool resource

冰动态蓄冷问题的实质是伴随有潜热释放或吸收的移动界面导热问题。由于已有的文献对自然冷贮藏系统的热力学分析涉及较少,而冰融化与凝固过程中传热规律的研究又是大规模制冰的关键,故该文从传热学角度出发,将自然冷贮藏系统中蓄冷水箱进行简化,通过试验得到相变界面随时间变化的实际曲线。在理论计算中,考虑冰层和水的导热量与水的相变潜热释放量之和等于冰层与外界的对流换热量建立数学模型,得到冰厚随时间变化的理论关系曲线。与实际曲线比较表明,理论模型能够反映冰一维动态蓄冷的实际进程。

The nature of glacial dynamic refrigeration is heat conduction in companion with the release and absorption of latent heat. The heat transfer rule is the key to large-scale ice making, while few were reported in the literature about thermodynamic analysis in preservation system with natural cool resources. The authors studied glacial thickness fluctuant curve with simplified test device and took heat transfer into account. In theory, the authors developed the complete mathematical model and indicated that the sum of thermal and latent heat flux between water and ice layer was equal to the heat of convection between ice and environment. In comparison with experimental curve, the theoretical model can reveal the real process of one-dimensional dynamic cool storage of ice. Simulating three-dimenslonal dynamic refrigeration should be considered in the further study.