| 摘要: |
| 采用精确解法与积分近似相结合的方法,对一种自制相变材蓄冷材料充冷凝固过程的相变导热问题进行了求解.获得了该蓄冷介质在板式蓄冷器中凝固时的相界面移动速度,边界面热流密度随时间变化的规律,及不同工况下蓄冷板厚度与预测蓄冷时间的关系.计算结果与实验结果吻合较好.结果表明,边界面的热流密度随固相区厚度的增加而减小;预测蓄冷时间随冷媒流体温度的降低而减小,随平板厚度的增加而增加. |
| 关键词: 热工学 精确法 积分法 相变材料 凝固 传热 |
| DOI： |
| 修订日期：2004-07-05
|
| 基金项目: |
|
| Study on Heat Transfer of Phase -Change Cool- Storage Slab in Solidification |
|
|
|
| Abstract: |
| Accurate solution and approximate integral methods were applied to study the heat transfer properties of a kind of phase-change material developed in this study which contained in a slab enclosure during solidification. The movement of phase-change interface, the heat flux rate of the boundary, and the relationship of the thickness of slab and the predicted time of solidification under different cooling conditions were obtained. The calculated results seem to be in good agreement with the experimental values. It is found that the thicker of the solid, the smaller the heat flux rate; the lower the temperature of the cooling liquid and the thinner of the slab, the shorter the cool charging time. |
| Key words: Pyrology,accurate solution,integral method,phase-change material,solidification,heat transfer |
