摘要
以某大型光热电站高温熔盐储罐为研究对象,采用瞬态热-机械应力分析结果,依据ASME规范对储罐进行棘轮和蠕变-疲劳失效评估。结果显示:正常和异常工况下储罐均未发生棘轮失效,因异常工况下储罐壁面存在165℃的温差,其结构的棘轮应变较正常工况增加72%。异常工况下储罐会发生蠕变-疲劳失效,结构的蠕变损伤和疲劳损伤较不会失效的正常工况分别增加1.4倍和9.0倍。为避免入罐熔盐温度大幅波动给结构安全带来危害,故建议采用熔盐缓冲罐降低温度波动范围。
Taking a high temperature molten-salt storage tank of a large-scale solar thermal power tower station as the research object and according to results of transient thermal-mechanical stress analysis,ratchetting failure and creep-fatigue failure of the storage tank are evaluated based on ASME code.The results show that ratchetting failure of the storage tank will not occur under normal and abnormal conditions.Compared to ratchetting strain of structure under normal condition,the strain under abnormal condition increases by 72%,due to the temperature difference(165 ℃)on the wall of tank.Storage tank will occur creep-fatigue failure under abnormal condition and the value of creep damage and fatigue damage increase by 1.4 times and 9 times respectively compared with normal condition which does not fail.It is suggested that a molten-salt buffer tank is recommended to reduce the hazard to structure caused by temperature fluctuation of molten salt.
作者
蔡君
刘长军
郭洪辛
谈建平
曾鑫
叶冬挺
Cai Jun;Liu Changjun;Guo Hongxing;Tan Jianping;Zeng Xin;Ye Dongting(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Electric Power Generation Engineering Co.,Shanghai 201199,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2023年第4期516-521,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(11502082)。
关键词
太阳能
热能储存
有限元法
蠕变-疲劳
棘轮
solar energy
thermal energy storage
finite element method
creep-fatigue
ratchetting
