混合碳酸盐的改良配制及其热物性分析  

Modified Preparation and Analysis of Thermal Physical Properties of Mixed Carbonates

作　　者：桑丽霞[1] 蔡萌[1] 任楠[1] 吴玉庭[1] 马重芳[1] 

机构地区：[1]北京工业大学环境与能源工程学院,传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京100124

出　　处：《工程热物理学报》2015年第3期615-618,共4页Journal of Engineering Thermophysics

基　　金：北京市教育委员会科技计划项目(No.KM201210005006);国家重点基础研究发展计划项目(No.2010CB227103);北京市科委计划项目(No.K2005014201201)

摘　　要：不同质量配比的6种为了开发用于太阳能高温热发电的热物性能更好的混合熔盐,本文通过添加Additive对三元碳酸盐进行改良配制,并采用差示扫描量热法和热重法测量了混合熔盐的熔点、初晶点、分解温度和比热容等热物性能。结果表明,添加Additive可使三元碳酸盐的熔点显著降低;优选混合熔盐的熔点和初品点分别降低到322.8℃和359.3℃,其分解温度维持在810℃,基于所测比热容计算的显热其热成本也相对三元碳酸盐有所降低。In order to develop the mixed molten salt used in the high temperature solar thermal power generation,the mixed molten salts were prepared by adding additives to lower the melting point and improve the thermal physical properties of ternary carbonates with different mass ratios.The melting point,initial crystallization point,decomposition temperature and specific heat were tested by using differential scanning calorimetry and thermogravimetry.The results show that melting points of 6 kinds of ternary carbonates can be reduced effectively by adding additive.The melting point,the initial crystallization point and the decomposition temperature of the optimized mixed molten salts is 328℃,359.3℃ and 810℃,respectively.By using the fitting equation of specific heat,the heat storage cost of the optimized mixed molten salts is analyzed,which is much lower than that of ternary carbonates.

关 键 词：混合熔融盐 熔点 初晶点 分解温度 蓄热成本 

分 类 号：TM615[电气工程—电力系统及自动化] TQ127.13[化学工程—无机化工]