化工学报2025，Vol.76Issue(3)：963-974,12.DOI:10.11949/0438-1157.20240631
基于相图分析的氯化物复合熔盐储热性能研究
Research on heat storage performance of chloride composite molten salt based on phase diagram analysis
摘要
Abstract
Molten salt heat storage technology is widely utilized in solar thermal power generation,power peak regulation,and the consumption of renewable energy,and the key is molten salts.Based on phase diagram thermodynamic calculation,this paper designs NaCl-KCl-ZnCl2 and NaCl-KCl-CaCl2 molten salts.The melting point of the designed NaCl-KCl-ZnCl2 molten salt is 36.6℃lower than that of the current commercial Solar Salt.The limit operating temperature of NaCl-KCl-CaCl2 molten salt is 747.5℃,which is greater than the minimum operating temperature of molten salt required for the next generation of solar thermal power generation.The effect of carbonized loofah sponge fragments(CLSF)on the thermal transient response performance of NaCl-KCl-CaCl2 molten salt is analyzed by combining infrared imaging and digital image processing technology.Compared with the ternary molten salt NaCl-KCl-CaCl2,the maximum melting enthalpy of NaCl-KCl-CaCl2/CLSF molten salt is decreased by 27.09%,the maximum thermal conductivity increased by 60.03%,and the heating time and cooling time in the same temperature range decreased by 62.50%and 39.13%respectively.Efficient heat conduction channel inside the composite molten salt is formed by CLSF,resulting in significantly improved the heat storage performance of the composite molten salt.The phase transition behavior and thermal stability of the ternary molten salt are not affected.It can be concluded that NaCl-KCl-CaCl2/CLSF composite molten salt has good thermal conductivity,thermal stability and heat storage performance,and broad application prospects.关键词
相变/复合材料/可再生能源/焓/热传导/熔盐储热Key words
phase change/composites/renewable energy/enthalpy/heat conduction/molten salt heat storage分类
能源与动力引用本文复制引用
肖俊兵,邹博,任建地,刘昌会,贾传坤..基于相图分析的氯化物复合熔盐储热性能研究[J].化工学报,2025,76(3):963-974,12.基金项目
国家自然科学基金项目(52206192) （52206192）
湖南省自然科学基金项目(2022JJ40499) （2022JJ40499）
湖南省教育厅优秀青年项目(22B0289) （22B0289）
