中国电机工程学报2026，Vol.46Issue(2)：715-726,中插22,13.DOI:10.13334/j.0258-8013.pcsee.241962
燃煤半闭式超临界二氧化碳发电系统变工况性能分析
Performance Analysis of a Coal-based Semi-closed S-CO2 Cycle Under Off-design Conditions
摘要
Abstract
To achieve flexible and efficient operation of the supercritical carbon dioxide(S-CO2)power generation system across a wide load range,the off-design model of a coal-fired semi-closed S-CO2 power generation system is developed.The part-load performance of the system is studied under the basic operation mode with full-admission turbines,constant back pressure,and constant outlet temperature.Through the regulation of turbine partial admission and back pressure adjustment,system parameters are optimized.Ultimately,an efficient method using turbine partial-admission regulation and back pressure regulation in synergy is proposed for off-design operation.The results show that when operating in the low load range,the system net efficiency can be increased by reducing the turbine partial-admission degree or lowering the turbine back pressure separately,while reducing the partial-admission degree or excessively lowering the back pressure will lead to the opposite effect in the high load range.By regulating the partial-admission degree and back pressure in synergy,the net efficiency of the system can be further improved in the low load range.For the power generation unit of 600 MWe,at 30％load,the net efficiency of the system can reach 34.77％,which is 3.8 percentage points higher than that of the basic operation mode.关键词
超临界二氧化碳循环/富氧燃烧/零碳排放/变工况性能/运行策略Key words
supercritical CO2 cycle/oxy-combustion/near-zero carbon emission/off-design performance/operation strategy分类
信息技术与安全科学引用本文复制引用
郭豪,许宏宇,韩禹,辛团团,许诚..燃煤半闭式超临界二氧化碳发电系统变工况性能分析[J].中国电机工程学报,2026,46(2):715-726,中插22,13.基金项目
国家重点研发计划项目(2023YFB4102400) （2023YFB4102400）
国家自然科学基金(面上项目)(52176004).National Key R&D Program of China(2023YFB4102400) （面上项目）
Project Supported by National Natural Science Foundation of China(General Program)(52176004). （General Program）
