IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v155y2018icp1-14.html
   My bibliography  Save this article

Improved design of supercritical CO2 Brayton cycle for coal-fired power plant

Author

Listed:
  • Zhang, Yifan
  • Li, Hongzhi
  • Han, Wanlong
  • Bai, Wengang
  • Yang, Yu
  • Yao, Mingyu
  • Wang, Yueming

Abstract

As an advanced power cycle, supercritical CO2 (sCO2) Brayton cycle has been considered as a promising alternative of conventional steam Rankine cycle for coal-fired power plants. The sCO2 power cycle must be improved to deal with coal-fired system integration constraints since coal-fired boiler is significantly different from nuclear and CSP heaters. The inlet temperature of the working fluid entering coal-fired boiler in sCO2 cycle is much higher than that in steam cycle, as it can be preheated more sufficiently in recuperators. Hence, the exhaust heat of coal-fired boiler flue gas cannot be fully utilized itself. It is of great importance to study on how to make good use of the exhaust heat of flue gas. An in-house code of sCO2 Brayton cycle tailored for coal-fired power plant was developed at first. Then, three improved cycle layouts for better utilization of the exhaust heat of flue gas were proposed, which were assessed in depth based on comprehensive analyses of both sCO2 boiler and cycle layout. The improved cycle with a second split flow to the boiler was proved to be the most effective one. With parameters of 31MPa/600 °C/620 °C, the maximum net efficiency was improved from a based value of 45.96% to an optimized value of 50.71%. It was also higher than that of a state-of-the-art ultra-supercritical steam power plant with same paremeters (about 46%–47%). Finally, the effects of the second split flow ratio on net efficiency were analyzed, and the equations to calculate the optimal range of second split flow ratio was derived.

Suggested Citation

  • Zhang, Yifan & Li, Hongzhi & Han, Wanlong & Bai, Wengang & Yang, Yu & Yao, Mingyu & Wang, Yueming, 2018. "Improved design of supercritical CO2 Brayton cycle for coal-fired power plant," Energy, Elsevier, vol. 155(C), pages 1-14.
    • Handle: RePEc:eee:energy:v:155:y:2018:i:c:p:1-14
    DOI: 10.1016/j.energy.2018.05.003
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544218308223
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2018.05.003?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. Binotti, Marco & Astolfi, Marco & Campanari, Stefano & Manzolini, Giampaolo & Silva, Paolo, 2017. "Preliminary assessment of sCO2 cycles for power generation in CSP solar tower plants," Applied Energy, Elsevier, vol. 204(C), pages 1007-1017.
    2. Yin, Hebi & Sabau, Adrian S. & Conklin, James C. & McFarlane, Joanna & Qualls, A. Lou, 2013. "Mixtures of SF6–CO2 as working fluids for geothermal power plants," Applied Energy, Elsevier, vol. 106(C), pages 243-253.
    3. Crespi, Francesco & Gavagnin, Giacomo & Sánchez, David & Martínez, Gonzalo S., 2017. "Supercritical carbon dioxide cycles for power generation: A review," Applied Energy, Elsevier, vol. 195(C), pages 152-183.
    4. Singh, Rajinesh & Kearney, Michael P. & Manzie, Chris, 2013. "Extremum-seeking control of a supercritical carbon-dioxide closed Brayton cycle in a direct-heated solar thermal power plant," Energy, Elsevier, vol. 60(C), pages 380-387.
    5. Mecheri, Mounir & Le Moullec, Yann, 2016. "Supercritical CO2 Brayton cycles for coal-fired power plants," Energy, Elsevier, vol. 103(C), pages 758-771.
    6. Le Moullec, Yann, 2013. "Conceptual study of a high efficiency coal-fired power plant with CO2 capture using a supercritical CO2 Brayton cycle," Energy, Elsevier, vol. 49(C), pages 32-46.
    7. Hanak, Dawid P. & Manovic, Vasilije, 2016. "Calcium looping with supercritical CO2 cycle for decarbonisation of coal-fired power plant," Energy, Elsevier, vol. 102(C), pages 343-353.
    8. Iverson, Brian D. & Conboy, Thomas M. & Pasch, James J. & Kruizenga, Alan M., 2013. "Supercritical CO2 Brayton cycles for solar-thermal energy," Applied Energy, Elsevier, vol. 111(C), pages 957-970.
    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. Xu, Jinliang & Sun, Enhui & Li, Mingjia & Liu, Huan & Zhu, Bingguo, 2018. "Key issues and solution strategies for supercritical carbon dioxide coal fired power plant," Energy, Elsevier, vol. 157(C), pages 227-246.
    2. Wang, Shengpeng & Zhang, Yifan & Li, Hongzhi & Yao, Mingyu & Peng, Botao & Yan, Junjie, 2020. "Thermohydrodynamic analysis of the vertical gas wall and reheat gas wall in a 300 MW supercritical CO2 boiler," Energy, Elsevier, vol. 211(C).
    3. Liu, Yaping & Wang, Ying & Huang, Diangui, 2019. "Supercritical CO2 Brayton cycle: A state-of-the-art review," Energy, Elsevier, vol. 189(C).
    4. Penkuhn, Mathias & Tsatsaronis, George, 2020. "Systematic evaluation of efficiency improvement options for sCO2 Brayton cycles," Energy, Elsevier, vol. 210(C).
    5. Olumayegun, Olumide & Wang, Meihong & Oko, Eni, 2019. "Thermodynamic performance evaluation of supercritical CO2 closed Brayton cycles for coal-fired power generation with solvent-based CO2 capture," Energy, Elsevier, vol. 166(C), pages 1074-1088.
    6. Li, Hongzhi & Zhang, Yifan & Yao, Mingyu & Yang, Yu & Han, Wanlong & Bai, Wengang, 2019. "Design assessment of a 5 MW fossil-fired supercritical CO2 power cycle pilot loop," Energy, Elsevier, vol. 174(C), pages 792-804.
    7. Yang, Jingze & Yang, Zhen & Duan, Yuanyuan, 2021. "Load matching and techno-economic analysis of CSP plant with S–CO2 Brayton cycle in CSP-PV-wind hybrid system," Energy, Elsevier, vol. 223(C).
    8. Ma, Yuegeng & Liu, Ming & Yan, Junjie & Liu, Jiping, 2017. "Thermodynamic study of main compression intercooling effects on supercritical CO2 recompression Brayton cycle," Energy, Elsevier, vol. 140(P1), pages 746-756.
    9. Marchionni, Matteo & Bianchi, Giuseppe & Tassou, Savvas A., 2018. "Techno-economic assessment of Joule-Brayton cycle architectures for heat to power conversion from high-grade heat sources using CO2 in the supercritical state," Energy, Elsevier, vol. 148(C), pages 1140-1152.
    10. Yang, Jingze & Yang, Zhen & Duan, Yuanyuan, 2020. "Off-design performance of a supercritical CO2 Brayton cycle integrated with a solar power tower system," Energy, Elsevier, vol. 201(C).
    11. Xu, Cheng & Zhang, Qiang & Yang, Zhiping & Li, Xiaosa & Xu, Gang & Yang, Yongping, 2018. "An improved supercritical coal-fired power generation system incorporating a supplementary supercritical CO2 cycle," Applied Energy, Elsevier, vol. 231(C), pages 1319-1329.
    12. Liu, Xuejiao & Zhong, Wenqi & Li, Pingjiao & Xiang, Jun & Liu, Guoyao, 2019. "Design and performance analysis of coal-fired fluidized bed for supercritical CO2 power cycle," Energy, Elsevier, vol. 176(C), pages 468-478.
    13. Yang, D.L. & Tang, G.H. & Fan, Y.H. & Li, X.L. & Wang, S.Q., 2020. "Arrangement and three-dimensional analysis of cooling wall in 1000 MW S–CO2 coal-fired boiler," Energy, Elsevier, vol. 197(C).
    14. Zhao, Yongming & Zhao, Lifeng & Wang, Bo & Zhang, Shijie & Chi, Jinling & Xiao, Yunhan, 2018. "Thermodynamic analysis of a novel dual expansion coal-fueled direct-fired supercritical carbon dioxide power cycle," Applied Energy, Elsevier, vol. 217(C), pages 480-495.
    15. Al-Sulaiman, Fahad A. & Atif, Maimoon, 2015. "Performance comparison of different supercritical carbon dioxide Brayton cycles integrated with a solar power tower," Energy, Elsevier, vol. 82(C), pages 61-71.
    16. 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).
    17. Li, Zhaozhi & Shao, Yingjuan & Zhong, Wenqi & Liu, Hao, 2023. "Optimal design and thermodynamic evaluation of supercritical CO2 oxy-coal circulating fluidized bed power generation systems," Energy, Elsevier, vol. 277(C).
    18. Linares, José Ignacio & Cantizano, Alexis & Arenas, Eva & Moratilla, Beatriz Yolanda & Martín-Palacios, Víctor & Batet, Lluis, 2017. "Recuperated versus single-recuperator re-compressed supercritical CO2 Brayton power cycles for DEMO fusion reactor based on dual coolant lithium lead blanket," Energy, Elsevier, vol. 140(P1), pages 307-317.
    19. Kunniyoor, Vijayaraj & Singh, Punit & Nadella, Karthik, 2020. "Value of closed-cycle gas turbines with design assessment," Applied Energy, Elsevier, vol. 269(C).
    20. Binotti, Marco & Astolfi, Marco & Campanari, Stefano & Manzolini, Giampaolo & Silva, Paolo, 2017. "Preliminary assessment of sCO2 cycles for power generation in CSP solar tower plants," Applied Energy, Elsevier, vol. 204(C), pages 1007-1017.

    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:155:y:2018:i:c:p:1-14. 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.