摘要
将针对碳酸盐、硝酸盐等几种主要熔融盐的组成、特性及最新低熔点的研究进展做了对比;重点探讨了国内外熔融盐传热、蓄热技术的进展及应用,给出了熔融盐传热计算关联式。本文认为采用熔融盐技术可以将电站系统运行参数提高到540℃以上,系统发电效率和储热效率大幅提高,发电成本相比导热油工质电站的发电成本降低2%,采用熔融盐技术的塔式太阳能热发电系统应用前景广阔。继续开展和完善低熔点熔融盐配方及熔融盐强化换热与蓄热研究,提高蓄热系统可靠性是熔融盐技术下一步研究的重点。
Melted salts and their heat transfer and accumulation technologies are regarded as an important means to further enhance the solar energy heat power generation efficiency. A contrast was made of the advances in the study of the composition,characteristics and latest low melting points of several main salts such as carbonate salt and nitrate salts etc. The emphasis was put on an exploratory study of the advances and applications of the melted salt heat transfer and accumulation technologies in both domestics and abroad and a melted salt heat transfer calculation correlation formula was given. It is believed that to use the melted salt technologies can enhance the operating parameter of the system to over 540 ℃ and heighten the power generation efficiency and heat accumulation efficiency by a large margin with the cost of power generation being reduced by 2% when compared with that of any power plant using heat conduction oil as the working medium. Therefore,the tower type solar energy heat power generation systems adopting the melted salt technologies will have a wide application prospect. The focus for the future studies will be to continue developing and improving the low melting point melted salt formula,studying the melted salt intensified heat exchange and accumulation and enhancing the reliability of heat accumulation systems.
出处
《热能动力工程》
CAS
CSCD
北大核心
2015年第5期659-665,816,共7页
Journal of Engineering for Thermal Energy and Power
基金
中国华能集团科技项目(HNKJ13-H21)
国家能源应用技术研究及工程示范项目(NY20130103)
关键词
熔融盐
太阳能热发电
低熔点
传热
蓄热
melted salt,solar energy heat power generation,low melting point,heat transfer,heat accumulation
