燃煤发电耦合压缩S-CO2储能系统构建与热力学分析OA
Construction and thermodynamic analysis of a coupled compression S-CO2 energy storage system for coal-fired power generation
随着我国"双碳"目标的深入推进,风电、光伏等间歇性可再生能源发电占比不断升高,导致电网调峰调频需求急剧增加.为显著提升传统燃煤发电机组的运行灵活性,本研究提出了一种压缩超临界二氧化碳(S-CO2)储能系统与燃煤机组耦合的方案.通过建立系统热力学模型,并基于(火用)分析原理,深入研究了关键运行参数对系统整体及各组成部件不可逆损失分布的影响.研究结果表明:该系统可实现68.12％的往返效率,在三种典型运行方式下的(火用)效率分别为56.18％、57.84％和62.94％;S-CO2工质流量、压缩机组入口压力及压缩机效率是对系统(火用)效率影响最为显著的关键参数.研究成果可为未来建设S-CO2储能循环工程应用奠定理论基础.
With the in-depth advancement of China's"dual carbon"strategy,the proportion of intermittent renewable energy generation such as wind power and photovoltaic power is constantly increasing,leading to a sharp rise in the demand for peak shaving and frequency regulation in the power grid.To significantly enhance the operational flexibility of traditional coal-fired power units,this study proposes a scheme for coupling a compressed supercritical carbon dioxide(S-CO2)energy storage system with coal-fired units.By establishing a thermodynamic model of the system and based on the principle of exergy analysis,the influence of key operating parameters on the distribution of irreversible losses in the overall system and its components is deeply investigated.The research results show that the system can achieve a round-trip efficiency of 68.12％,with efficiency rates of 56.18％,57.84％,and 62.94％under three typical operating modes,respectively.The S-CO2 working fluid flow rate,compressor inlet pressure,and compressor efficiency are the key parameters that most significantly affect the system's efficiency.The research findings can lay a theoretical foundation for the future construction and application of S-CO 2 energy storage cycle engineering.
王迪;李胜杰;崔颖晗;孙灵芳;李晓莉
东北电力大学自动化工程学院,吉林吉林 132000东北电力大学自动化工程学院,吉林吉林 132000长春工业大学人文信息学院电气与电子工程学院,吉林长春 130122东北电力大学自动化工程学院,吉林吉林 132000东北电力大学能源与动力工程学院,吉林吉林 132000
能源科技
燃煤机组储能超临界二氧化碳(火用)分析
coal-fired power unitenergy storagesupercritical carbon dioxideexergy analysis
《化工学报》 2026 (4)
2147-2159,13
国家自然科学基金项目(52306004)
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