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In order to improve the operation flexibility of coal-fired power units, a thermal system of coal-fired power system coupled with supercritical carbon dioxide (S-CO2) energy storage cycle is proposed, and the effect of operation parameters on the system irreversible loss is investigated by thermodynamic exergy analysis. The results show that, the energy storage efficiency of the system can reach 56.14%, and the S-CO2 flow rate and the S-CO2 compressor/turbine pressure ratio have a greater influence on the system exergy efficiency. With the increase of S-CO2 flow rate from 50 kg/s to 70 kg/s, the exergy efficiency of the system increases from 44.0% to 61.0%. With the increase of compressor/turbine pressure ratio from 3.0 to 6.0, the exergy efficiency of the system increases from 27.5% to 52.5%. The method proposed provides a theoretical reference for improving the coal-fired power unit operation flexibility, and provides ideas for large-scale grid connection of renewable energy.

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为提升燃煤机组运行灵活性,提出了燃煤发电集成超临界二氧化碳(S-CO2)储能循环的热力系统,并基于热力学㶲分析方法,研究了运行参数对系统不可逆损失的影响。研究结果表明:该系统储能效率可达56.14%,S-CO2流量及S-CO2压缩机/透平压比对系统㶲效率影响较大;当S-CO2流量在50 kg/s至70 kg/s间增大,系统㶲效率从44.0%增大至61.0%;当压缩机/透平压比在3.0至6.0间增大,系统㶲效率从27.5%增大至52.5%。本文提出的方法为提升燃煤机组运行灵活性提供了理论参考,并为可再生能源大规模并网提供了思路。

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曹丽华(1973),女,博士,教授,主要研究方向为热力系统集成与优化,
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李晓莉(1990),女,博士研究生,主要研究方向为热力系统集成与优化,

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集成超临界二氧化碳储能循环燃煤发电系统热力学分析
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李晓莉 , 曹丽华
热力发电 | 超临界二氧化碳循环发电系统特性研究 2023,52(6): 93-99
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热力发电 | 超临界二氧化碳循环发电系统特性研究 2023, 52(6): 93-99
集成超临界二氧化碳储能循环燃煤发电系统热力学分析
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李晓莉 , 曹丽华
作者信息
  • 东北电力大学能源与动力工程学院,吉林 吉林 132012
  • 李晓莉(1990),女,博士研究生,主要研究方向为热力系统集成与优化,

通讯作者:

曹丽华(1973),女,博士,教授,主要研究方向为热力系统集成与优化,
Thermodynamic analysis of coal-fired power generation system integrating supercritical carbon dioxide energy storage cycle
Xiaoli LI , Lihua CAO
Affiliations
  • School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China
出版时间: 2023-06-25 doi: 10.19666/j.rlfd.202208164
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为提升燃煤机组运行灵活性,提出了燃煤发电集成超临界二氧化碳(S-CO2)储能循环的热力系统,并基于热力学㶲分析方法,研究了运行参数对系统不可逆损失的影响。研究结果表明:该系统储能效率可达56.14%,S-CO2流量及S-CO2压缩机/透平压比对系统㶲效率影响较大;当S-CO2流量在50 kg/s至70 kg/s间增大,系统㶲效率从44.0%增大至61.0%;当压缩机/透平压比在3.0至6.0间增大,系统㶲效率从27.5%增大至52.5%。本文提出的方法为提升燃煤机组运行灵活性提供了理论参考,并为可再生能源大规模并网提供了思路。

燃煤机组  /  灵活性  /  超临界二氧化碳  /  㶲分析

In order to improve the operation flexibility of coal-fired power units, a thermal system of coal-fired power system coupled with supercritical carbon dioxide (S-CO2) energy storage cycle is proposed, and the effect of operation parameters on the system irreversible loss is investigated by thermodynamic exergy analysis. The results show that, the energy storage efficiency of the system can reach 56.14%, and the S-CO2 flow rate and the S-CO2 compressor/turbine pressure ratio have a greater influence on the system exergy efficiency. With the increase of S-CO2 flow rate from 50 kg/s to 70 kg/s, the exergy efficiency of the system increases from 44.0% to 61.0%. With the increase of compressor/turbine pressure ratio from 3.0 to 6.0, the exergy efficiency of the system increases from 27.5% to 52.5%. The method proposed provides a theoretical reference for improving the coal-fired power unit operation flexibility, and provides ideas for large-scale grid connection of renewable energy.

coal-fired power unit  /  flexibility  /  supercritical carbon dioxide  /  exergy analysis
李晓莉, 曹丽华. 集成超临界二氧化碳储能循环燃煤发电系统热力学分析. 热力发电, 2023 , 52 (6) : 93 -99 . DOI: 10.19666/j.rlfd.202208164
Xiaoli LI, Lihua CAO. Thermodynamic analysis of coal-fired power generation system integrating supercritical carbon dioxide energy storage cycle[J]. Thermal Power Generation, 2023 , 52 (6) : 93 -99 . DOI: 10.19666/j.rlfd.202208164
  • 吉林省教育厅科研项目(JJKH20220099KJ)
2023年第52卷第6期
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文章信息
doi: 10.19666/j.rlfd.202208164
  • 接收时间:2022-08-12
  • 首发时间:2026-01-23
  • 出版时间:2023-06-25
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  • 收稿日期:2022-08-12
基金
Scientific Research Project of Jilin Provincial Department of Education(JJKH20220099KJ)
吉林省教育厅科研项目(JJKH20220099KJ)
作者信息
    东北电力大学能源与动力工程学院,吉林 吉林 132012

通讯作者:

曹丽华(1973),女,博士,教授,主要研究方向为热力系统集成与优化,
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2种不同金属材料的力学参数

Family
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Number of
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种数
Number of
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Percentage of
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Genus
种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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