八水氢氧化钡相变材料的强化传热实验

Experiment on heat transfer enhancement of barium hydroxide octahydrate phase change material

采用差示扫描量热法(DSC)对八水氢氧化钡相变材料进行热物性分析,总结出一种针对结晶水合盐相变温度与潜热准确可靠的测量方法.通过扫描电子显微镜(SEM)获得相变材料与金属容器截面腐蚀情况的图像,证明八水氢氧化钡与紫铜有优良的相容性.分别对含/未含泡沫铜的固液相变蓄热体进行实验研究,结果表明:泡沫铜填充使相变材料在固相区内熔化时间减少了26%,增强了相变材料的传热效果,而且将八水氢氧化钡过冷度降低了50%.

The thermal properties of barium hydroxide octahydrate（Ba（OH）2·8H2O） were measured by differential scanning calorimetry（DSC）.The DSC measurement method can be used for phase change temperature and latent heat of salt hydrates.The cross section image from scanning electron microscope（SEM）indicates that Ba（OH）2·8H2O and copper present excellent compatibility.Experiments were conducted to investigate heat transfer characteristics of Ba（OH）2·8H2O with/without copper foams.The results show that melting time of the phase change material（PCM）is shortened by 26%in PCM solid zone and the heat transfer rate of the PCM is enhanced.The supercooling degree of Ba（OH）2·8H2O is reduced by 50%.