{"title":"用最优控制方法对核电厂给热水器启动过程进行动态火用优化","authors":"Zhijiang Zhang, Zhaofei Tian","doi":"10.1016/j.nucengdes.2025.114163","DOIUrl":null,"url":null,"abstract":"<div><div>The operational optimization of energy systems is of great significance for the sustainable development of energy, as well as for achieving carbon peaking and carbon neutrality. This research took the feedwater heater in a nuclear power unit as the research object, developed a thermo-hydraulic model applicable to the optimization. The optimal control algorithm, which is widely used in chemical and energy systems, has been innovatively applied to nuclear power units and combined with the dynamic exergy analysis method to optimize the start-up process. The results show that although the time optimal control shortens the startup time by 19.69%, the cumulative exergy loss increases by 1 time. The optimal control with the highest exergy efficiency as the goal reduced the start-up time by 19.23%, and the accumulated exergy destruction decreased by 25.14%. This study greatly reduced the startup time of feedwater heater and improved the process exergy efficiency. This study provided important guidance for the dynamic exergy optimization of energy system start-up processes and addressed the long-standing limitation of exergy analysis being confined to steady-state conditions.</div></div>","PeriodicalId":19170,"journal":{"name":"Nuclear Engineering and Design","volume":"441 ","pages":"Article 114163"},"PeriodicalIF":2.1000,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic exergy optimization of feedwater heater start-up process in nuclear power plant using optimal control method\",\"authors\":\"Zhijiang Zhang, Zhaofei Tian\",\"doi\":\"10.1016/j.nucengdes.2025.114163\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The operational optimization of energy systems is of great significance for the sustainable development of energy, as well as for achieving carbon peaking and carbon neutrality. This research took the feedwater heater in a nuclear power unit as the research object, developed a thermo-hydraulic model applicable to the optimization. The optimal control algorithm, which is widely used in chemical and energy systems, has been innovatively applied to nuclear power units and combined with the dynamic exergy analysis method to optimize the start-up process. The results show that although the time optimal control shortens the startup time by 19.69%, the cumulative exergy loss increases by 1 time. The optimal control with the highest exergy efficiency as the goal reduced the start-up time by 19.23%, and the accumulated exergy destruction decreased by 25.14%. This study greatly reduced the startup time of feedwater heater and improved the process exergy efficiency. This study provided important guidance for the dynamic exergy optimization of energy system start-up processes and addressed the long-standing limitation of exergy analysis being confined to steady-state conditions.</div></div>\",\"PeriodicalId\":19170,\"journal\":{\"name\":\"Nuclear Engineering and Design\",\"volume\":\"441 \",\"pages\":\"Article 114163\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Engineering and Design\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0029549325003401\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Engineering and Design","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0029549325003401","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Dynamic exergy optimization of feedwater heater start-up process in nuclear power plant using optimal control method
The operational optimization of energy systems is of great significance for the sustainable development of energy, as well as for achieving carbon peaking and carbon neutrality. This research took the feedwater heater in a nuclear power unit as the research object, developed a thermo-hydraulic model applicable to the optimization. The optimal control algorithm, which is widely used in chemical and energy systems, has been innovatively applied to nuclear power units and combined with the dynamic exergy analysis method to optimize the start-up process. The results show that although the time optimal control shortens the startup time by 19.69%, the cumulative exergy loss increases by 1 time. The optimal control with the highest exergy efficiency as the goal reduced the start-up time by 19.23%, and the accumulated exergy destruction decreased by 25.14%. This study greatly reduced the startup time of feedwater heater and improved the process exergy efficiency. This study provided important guidance for the dynamic exergy optimization of energy system start-up processes and addressed the long-standing limitation of exergy analysis being confined to steady-state conditions.
期刊介绍:
Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology.
Fundamentals of Reactor Design include:
• Thermal-Hydraulics and Core Physics
• Safety Analysis, Risk Assessment (PSA)
• Structural and Mechanical Engineering
• Materials Science
• Fuel Behavior and Design
• Structural Plant Design
• Engineering of Reactor Components
• Experiments
Aspects beyond fundamentals of Reactor Design covered:
• Accident Mitigation Measures
• Reactor Control Systems
• Licensing Issues
• Safeguard Engineering
• Economy of Plants
• Reprocessing / Waste Disposal
• Applications of Nuclear Energy
• Maintenance
• Decommissioning
Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.