IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v315y2025ics0360544225001082.html
   My bibliography  Save this article

Dynamic response characteristics of sCO2 mixtures under variable conditions

Author

Listed:
  • Meng, Qingqiang
  • Cao, Lihua
  • Fang, Minghui
  • Si, Heyong

Abstract

Using CO2-mixed working fluids in power cycle devices can enhance the thermal conversion efficiency of solar thermal power plants without altering the system layout. However, the dynamic characteristics of CO2-mixed working fluids in solar thermal systems remain unclear. The present study employs binary CO2 mixtures as alternative working fluids to construct a dynamic power generation system that integrates the Brayton cycle with parabolic solar energy. Based upon multi-objective optimization, the design operating parameters for the system were determined. The study also explored the dynamic characteristics of the system under mass and speed step change. The results indicated that CO2-propane achieved the highest cycle efficiency, though it was limited by a 25-s adjustment time and significant parameter oscillations, affecting its stability. In contrast, CO2-H2S demonstrated better dynamic characteristics due to its moderate thermal efficiency, excellent stability, and rapid response time. Furthermore, CO2-propane was sensitive to the compressor inlet pressure (CIP) and exhibited considerable fluctuations. When the CIP deviated from the design value, CO2-H2S experienced a temperature overshoot of up to 52 K, while CO2-propane exhibited delays in temperature and pressure due to the interactions of its physical properties, resulting in significant oscillations and a slower pressure response.

Suggested Citation

  • Meng, Qingqiang & Cao, Lihua & Fang, Minghui & Si, Heyong, 2025. "Dynamic response characteristics of sCO2 mixtures under variable conditions," Energy, Elsevier, vol. 315(C).
  • Handle: RePEc:eee:energy:v:315:y:2025:i:c:s0360544225001082
    DOI: 10.1016/j.energy.2025.134466
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544225001082
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.energy.2025.134466?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Aseri, Tarun Kumar & Sharma, Chandan & Kandpal, Tara C., 2021. "Estimation of capital costs and techno-economic appraisal of parabolic trough solar collector and solar power tower based CSP plants in India for different condenser cooling options," Renewable Energy, Elsevier, vol. 178(C), pages 344-362.
    2. Tafur-Escanta, Paul & López-Paniagua, Ignacio & Muñoz-Antón, Javier, 2023. "Thermodynamics analysis of the supercritical CO2 binary mixtures for Brayton power cycles," Energy, Elsevier, vol. 270(C).
    3. Rath, Sebastian & Mickoleit, Erik & Gampe, Uwe & Breitkopf, Cornelia & Jäger, Andreas, 2022. "Systematic analysis of additives on the performance parameters of sCO2 cycles and their individual effects on the cycle characteristics," Energy, Elsevier, vol. 252(C).
    4. Paul Tafur-Escanta & Robert Valencia-Chapi & Ignacio López-Paniagua & Luis Coco-Enríquez & Javier Muñoz-Antón, 2021. "Supercritical CO 2 Binary Mixtures for Recompression Brayton s-CO 2 Power Cycles Coupled to Solar Thermal Energy Plants," Energies, MDPI, vol. 14(13), pages 1-27, July.
    5. Wang, Di & Zhou, Yu & Si, Long & Sun, Lingfang & Zhou, Yunlong, 2024. "Performance study of 660 MW coal-fired power plant coupled transcritical carbon dioxide energy storage cycle: Sensitivity and dynamic characteristic analysis," Energy, Elsevier, vol. 293(C).
    6. Niu, Xiaojuan & Ma, Ning & Bu, Zhengkun & Hong, Wenpeng & Li, Haoran, 2022. "Thermodynamic analysis of supercritical Brayton cycles using CO2-based binary mixtures for solar power tower system application," Energy, Elsevier, vol. 254(PA).
    7. Wang, Xurong & Dai, Yiping, 2016. "Exergoeconomic analysis of utilizing the transcritical CO2 cycle and the ORC for a recompression supercritical CO2 cycle waste heat recovery: A comparative study," Applied Energy, Elsevier, vol. 170(C), pages 193-207.
    8. Deng, Tianrui & Li, Xionghui & Wang, Qiuwang & Ma, Ting, 2019. "Dynamic modelling and transient characteristics of supercritical CO2 recompression Brayton cycle," Energy, Elsevier, vol. 180(C), pages 292-302.
    9. Wang, Xurong & Li, Xiaoxiao & Li, Qibin & Liu, Lang & Liu, Chao, 2020. "Performance of a solar thermal power plant with direct air-cooled supercritical carbon dioxide Brayton cycle under off-design conditions," Applied Energy, Elsevier, vol. 261(C).
    10. Zhang, Qiang & Wang, Zhiming & Du, Xiaoze & Yu, Gang & Wu, Hongwei, 2019. "Dynamic simulation of steam generation system in solar tower power plant," Renewable Energy, Elsevier, vol. 135(C), pages 866-876.
    11. Liu, Yaping & Wang, Ying & Huang, Diangui, 2019. "Supercritical CO2 Brayton cycle: A state-of-the-art review," Energy, Elsevier, vol. 189(C).
    12. Pan, Lisheng & Ma, Yuejing & Li, Teng & Li, Huixin & Li, Bing & Wei, Xiaolin, 2019. "Investigation on the cycle performance and the combustion characteristic of two CO2-based binary mixtures for the transcritical power cycle," Energy, Elsevier, vol. 179(C), pages 454-463.
    13. Ma, Xiaofeng & Jiang, Peixue & Zhu, Yinhai, 2024. "Dynamic simulation and analysis of transient characteristics of a thermal-to-electrical conversion system based on supercritical CO2 Brayton cycle in hypersonic vehicles," Applied Energy, Elsevier, vol. 359(C).
    14. Ma, Ning & Meng, Fugui & Hong, Wenpeng & Li, Haoran & Niu, Xiaojuan, 2023. "Thermodynamic assessment of the dry-cooling supercritical Brayton cycle in a direct-heated solar power tower plant enabled by CO2-propane mixture," Renewable Energy, Elsevier, vol. 203(C), pages 649-663.
    15. Luu, Minh Tri & Milani, Dia & McNaughton, Robbie & Abbas, Ali, 2017. "Dynamic modelling and start-up operation of a solar-assisted recompression supercritical CO2 Brayton power cycle," Applied Energy, Elsevier, vol. 199(C), pages 247-263.
    16. Albright, Jacob & Zitney, Stephen E. & Liese, Eric, 2023. "Control methods for mitigating flow oscillations in a supercritical CO2 recompression closed Brayton cycle," Applied Energy, Elsevier, vol. 352(C).
    17. Han, Xinrui & Liu, Deying & Li, Haoyu & Wang, Yanhong & Wang, Di, 2024. "Dynamic characteristics and control method of the solar-coal energy complementary system," Energy, Elsevier, vol. 299(C).
    18. Wang, Di & Han, Xinrui & Si, Long & Zhou, Yu, 2024. "A coordinated control strategy and dynamic characteristics of coal-fired units coupled with the S-CO2 energy storage cycle," Applied Energy, Elsevier, vol. 372(C).
    19. S. Mohammad S. Mahmoudi & Sina Salehi & Mortaza Yari & Marc A. Rosen, 2017. "Exergoeconomic Performance Comparison and Optimization of Single-Stage Absorption Heat Transformers," Energies, MDPI, vol. 10(4), pages 1-28, April.
    20. Xu, Zhen & Liu, Xinxin & Xie, Yingchun, 2023. "Off-design performances of a dry-cooled supercritical recompression Brayton cycle using CO2–H2S as working fluid," Energy, Elsevier, vol. 276(C).
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Yu, Aofang & Xing, Lingli & Su, Wen & Liu, Pei, 2023. "State-of-the-art review on the CO2 combined power and cooling system: System configuration, modeling and performance," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    2. Bian, Xingyan & Wang, Xuan & Wang, Jingyu & Wang, Rui & Zhang, Xuanang & Tian, Hua & Shu, Gequn, 2024. "Transcritical CO2 mixture power for nuclear plant application: Concept and thermodynamic optimization," Energy, Elsevier, vol. 309(C).
    3. Zhang, Tao & Wu, Chuang & Li, Zhankui & Li, Bo, 2024. "Enhanced dynamic modeling of regenerative CO2 transcritical power cycles: Comparative analysis of Pham-corrected and conventional turbine models," Energy, Elsevier, vol. 313(C).
    4. Ma, Ning & Bu, Zhengkun & Fu, Yanan & Hong, Wenpeng & Li, Haoran & Niu, Xiaojuan, 2023. "An operation strategy and off-design performance for supercritical brayton cycle using CO2-propane mixture in a direct-heated solar power tower plant," Energy, Elsevier, vol. 278(PA).
    5. Yang, Jingze & Yang, Zhen & Duan, Yuanyuan, 2022. "A review on integrated design and off-design operation of solar power tower system with S–CO2 Brayton cycle," Energy, Elsevier, vol. 246(C).
    6. Roy, Dibyendu & Samanta, Samiran & Roy, Sumit & Smallbone, Andrew & Roskilly, Anthony Paul, 2023. "Multi-objective optimisation of a power generation system integrating solid oxide fuel cell and recuperated supercritical carbon dioxide cycle," Energy, Elsevier, vol. 281(C).
    7. Ma, Ning & Meng, Fugui & Hong, Wenpeng & Li, Haoran & Niu, Xiaojuan, 2023. "Thermodynamic assessment of the dry-cooling supercritical Brayton cycle in a direct-heated solar power tower plant enabled by CO2-propane mixture," Renewable Energy, Elsevier, vol. 203(C), pages 649-663.
    8. Thanganadar, Dhinesh & Fornarelli, Francesco & Camporeale, Sergio & Asfand, Faisal & Patchigolla, Kumar, 2021. "Off-design and annual performance analysis of supercritical carbon dioxide cycle with thermal storage for CSP application," Applied Energy, Elsevier, vol. 282(PA).
    9. Li, Xiaoxiao & Gurgenci, Hal & Guan, Zhiqiang & Wang, Xurong & Duniam, Sam, 2017. "Measurements of crosswind influence on a natural draft dry cooling tower for a solar thermal power plant," Applied Energy, Elsevier, vol. 206(C), pages 1169-1183.
    10. Son, Seongmin & Jeong, Yongju & Cho, Seong Kuk & Lee, Jeong Ik, 2020. "Development of supercritical CO2 turbomachinery off-design model using 1D mean-line method and Deep Neural Network," Applied Energy, Elsevier, vol. 263(C).
    11. Tong, Yongjing & Duan, Liqiang & Yang, Ming & Pang, Liping, 2022. "Design optimization of a new supercritical CO2 single reheat coal-fired power generation system," Energy, Elsevier, vol. 239(PB).
    12. Xia, Jiaxi & Wang, Jiangfeng & Lou, Juwei & Hu, Jianjun & Yao, Sen, 2023. "Thermodynamic, economic, environmental analysis and multi-objective optimization of a novel combined cooling and power system for cascade utilization of engine waste heat," Energy, Elsevier, vol. 277(C).
    13. Xiao, Tingyu & Liu, Chao & Wang, Xurong & Wang, Shukun & Xu, Xiaoxiao & Li, Qibin & Li, Xiaoxiao, 2022. "Life cycle assessment of the solar thermal power plant integrated with air-cooled supercritical CO2 Brayton cycle," Renewable Energy, Elsevier, vol. 182(C), pages 119-133.
    14. Alsawy, Tariq & Elsayed, Mohamed L. & Mohammed, Ramy H. & Mesalhy, Osama, 2024. "Accuracy assessment of the turbomachinery performance maps correction models used in dynamic characteristics of supercritical CO2 Brayton power cycle," Energy, Elsevier, vol. 309(C).
    15. Battisti, F.G. & de Araujo Passos, L.A. & da Silva, A.K., 2022. "Economic and environmental assessment of a CO2 solar-powered plant with packed-bed thermal energy storage," Applied Energy, Elsevier, vol. 314(C).
    16. Ehsan, M. Monjurul & Guan, Zhiqiang & Gurgenci, Hal & Klimenko, Alexander, 2020. "Feasibility of dry cooling in supercritical CO2 power cycle in concentrated solar power application: Review and a case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 132(C).
    17. Guo, Jia-Qi & Li, Ming-Jia & He, Ya-Ling & Xu, Jin-Liang, 2019. "A study of new method and comprehensive evaluation on the improved performance of solar power tower plant with the CO2-based mixture cycles," Applied Energy, Elsevier, vol. 256(C).
    18. Xie, Liangtao & Yang, Jianguo & Yang, Xin & Yu, Yonghua & He, Yuhai & Hu, Nao & Fan, Yu & Sun, Sicong & Dong, Fei & Cao, Bingxin, 2024. "Optimisation of Brayton cycle CO2-based binary mixtures: An application for waste heat recovery of marine low-speed diesel engines exhaust gas," Energy, Elsevier, vol. 312(C).
    19. Liu, Yunxia & Zhao, Yuanyang & Yang, Qichao & Liu, Guangbin & Li, Liansheng, 2024. "Research on compression process and compressors in supercritical carbon dioxide power cycle systems: A review," Energy, Elsevier, vol. 297(C).
    20. Zhang, Shijie & Li, Liushuai & Huo, Erguang & Yu, Yujie & Huang, Rui & Wang, Shukun, 2024. "Parameters analysis and techno-economic comparison of various ORCs and sCO2 cycles as the power cycle of Lead–Bismuth molten nuclear micro-reactor," Energy, Elsevier, vol. 295(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:315:y:2025:i:c:s0360544225001082. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.