固液相变蓄能的数学模型和自然对流换热系数的实验研究  

THE MATH MODEL OF ENERGY STORAGE SYSTEM WITH SOLID-LIQUID PHASE CHANGE AND THE RESEARCH ON NATURAL CONVECTION COEFFICIENT OF HEAT TRANSFER BY EXPERIMENTS

作　　者：曾艳[1] 田怀璋[1] 余鹏[1] 高原[1] 

机构地区：[1]西安交通大学能动学院制冷与低温工程系,西安710049

出　　处：《制冷与空调》2002年第2期15-18,共4页Refrigeration and Air-Conditioning

摘　　要：引入自然对流换热系数 ,将固液蓄能数学模型简化为仅用能量方程加以描述。并通过实验测得相变过程的实际温度场 ,证明了自然对流固液相变换热的影响不可忽略 。In this paper, the math model of energy storage system with solid liquid phase change is simplified by introducing natural convection coefficient of heat transfer α. The model can be described only by an energy equation. With a series of experiments, the temperature fields of actual phase change process were gained. The experiments also proved that the effect of natural convection on phase change can't be neglected and the viewpoint that the velocity of solid liquid interface displacement will be enhanced with the augmentation of α.

关 键 词：固液相变蓄能 数学模型 自然对流换热系数 界面移动速率 

分 类 号：TB611[一般工业技术—制冷工程]