发电技术2025，Vol.46Issue(6)：1200-1211,12.DOI:10.12096/j.2096-4528.pgt.25063
基于熔盐储热的核电机组调峰特性研究
Study on Peak Shaving Characteristics of Nuclear Power Unit Based on Molten Salt Heat Storage
摘要
Abstract
[Objectives]Nuclear power units have great potential for peak-shaving.However,the peak-valley fluctuations in terminal load and the characteristics of nuclear reactors to maintain stable output seriously affect the safe and efficient operation of nuclear power peak-shaving process.Heat storage technology,which enables the storage of thermal energy,is an important way to solve the imbalance between nuclear power supply and demand.Therefore,the peak-shaving characteristics of nuclear power units based on molten salt heat storage are studied.[Methods]This study takes an actual nuclear power unit as the research object.Based on the principle of energy cascade utilization,three nuclear power peak-shaving system schemes coupled with molten salt heat storage are proposed:main steam heating molten salt,high-pressure cylinder exhaust steam heating molten salt,and electric heating molten salt.A simulation model of the coupled system is established and supplemented with targeted experimental validation.The system thermodynamic performance under five peak-shaving amplitudes of 5％,10％,15％,20％,and 25％is systematically studied.[Results]The nuclear power peak-shaving system coupled with molten salt heat storage improves the peak-shaving performance of the nuclear power unit while meeting different heating demands.The high-pressure cylinder exhaust steam heating molten salt coupled system scheme exhibits the best thermodynamic performance,followed by the main steam heating molten salt coupled system scheme,and the electric heating molten salt coupled system scheme performs the worst.Under a 25％peak-shaving amplitude,the energy efficiencies of the high-pressure cylinder exhaust steam heating molten salt coupled system scheme and the electric heating molten salt coupled system scheme are 63.76％and 37.84％,respectively,and the exergy efficiencies are 59.41％and 23.04％,respectively.[Conclusions]The proposed molten salt heat storage schemes for nuclear power units can be applied to scenarios such as municipal heating supply,providing guidance for the safe and efficient operation of nuclear power units in grid peak shaving.关键词
核电机组/调峰/熔盐储热/耦合系统/能量梯级利用/热力学分析Key words
nuclear power unit/peak-shaving/molten salt heat storage/integrated system/energy cascade utilization/thermodynamic analysis分类
能源科技引用本文复制引用
刘松洋,白云鹏,陈志董,丁亮,孙超杰,孔艳强..基于熔盐储热的核电机组调峰特性研究[J].发电技术,2025,46(6):1200-1211,12.基金项目
国家自然科学基金项目(52276062).Project Supported by National Natural Science Foundation of China(52276062). （52276062）
