Mg/CaCl_2高导热传热蓄热材料的制备与性能  

Preparation and Properties of High Thermal Conductivity Mg/CaCl_2 Materials for Heat Storage and Transfer

作　　者：田禾青[1] 王维龙[1] 丁静[1] 魏小兰[2] 张健鹏[1] 欧泽森 

机构地区：[1]中山大学工学院,广州510006 [2]华南理工大学传热强化与过程节能教育部重点实验室,广州510640

出　　处：《工程热物理学报》2016年第8期1728-1731,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重点项目(No.51436009);国家自然科学基金资助项目(No.U1507113);国家自然科学基金资助项目(No.51176206);国家高技术研究发展计划(No.2012AA050604)

摘　　要：以无机盐氯化钙(CaCl_2)作为高温传热蓄热材料,添加金属镁(Mg)作为传热增强剂,采用静态熔融法制备具有高导热性能的Mg/CaCl_2传热蓄热材料。实验结果表明:在熔融状态下,镁条熔化成为小液滴并弥散分布以"金属雾"形式分散在氯化钙熔体中。金属镁的加入几乎没有改变体系的熔点,但是随着镁含量的增大,体系的潜热先减小后增大,导热系数先增大后减小。当镁添加量w(Mg)=0.1时,导热系数增大了41.17%。Calcium chloride was used as high-temperature thermal energy storage and transfer material, and magnesium was added as heat transfer enhancer. Mg/CaCl2 composites with high thermal conductivity were made by statically nfixing method. The results showed that magnesium slice would turned to droplet and dispersively distributed in molten salts in the form of metal fog. The addition of magnesium didn＇t change the melting point of system. But the latent heat showed a sharply increased at first and then decreased with the addition of magnesium loading increased, while the thermal conductivity displayed the opposite tendency. Compared with thermal conductivity of pure calcium chloride, the composites with w（Mg）=0.1 improved 41.17%.

关 键 词：氯化钙 静态熔融法 金属雾 导热系数 

分 类 号：TK512[动力工程及工程热物理—热能工程]