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Energy and exergy analyses of S–CO2 coal-fired power plant with reheating processes

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  • Chen, Zhewen
  • Wang, Yanjuan
  • Zhang, Xiaosong

Abstract

S–CO2 (Supercritical-CO2) coal-fired power plant is a promising technology for efficient and clean utilization of coal for power generation. The conversion and transfer of the energy and exergy in the power plants with double-reheat and single-reheat processes are studied. With the main gas parameters of 32 MPa/893.15 K, the power generation efficiencies of the S–CO2 coal-fired power plant with double-reheat and single-reheat processes are 49.06% and 48.72%, respectively. The corresponding exergy efficiencies are 48.02% and 47.69%, respectively. The origins of exergy destructions in different units are studied using the Energy Utilization Diagram (EUD) method. The exergy distributions of the power plants are presented. For the power plant with double-reheat process, the work output, the exergy exhaust into the atmosphere, the exergy destruction in combustion process, the exergy destruction in heat transfer processes, the exergy destruction caused by pressure loss, and the exergy destructions in turbo systems account for 48.02%, 9.66%, 20.45%, 17.56%, 1.08%, and 3.23% of the total exergy input of the power plant, respectively.

Suggested Citation

  • Chen, Zhewen & Wang, Yanjuan & Zhang, Xiaosong, 2020. "Energy and exergy analyses of S–CO2 coal-fired power plant with reheating processes," Energy, Elsevier, vol. 211(C).
    • Handle: RePEc:eee:energy:v:211:y:2020:i:c:s036054422031759x
    DOI: 10.1016/j.energy.2020.118651
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    References listed on IDEAS

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    1. 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).
    2. Andrey Rogalev & Vladimir Kindra & Ivan Komarov & Sergey Osipov & Olga Zlyvko, 2021. "Structural and Parametric Optimization of S-CO 2 Thermal Power Plants with a Pulverized Coal-Fired Boiler Operating in Russia," Energies, MDPI, vol. 14(21), pages 1-20, November.
    3. 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).
    4. Zhu, Meng & Zhou, Jing & Chen, Lei & Su, Sheng & Hu, Song & Qing, Haoran & Li, Aishu & Wang, Yi & Zhong, Wenqi & Xiang, Jun, 2022. "Economic analysis and cost modeling of supercritical CO2 coal-fired boiler based on global optimization," Energy, Elsevier, vol. 239(PD).
    5. Obika, Echezona & Heberle, Florian & Brüggemann, Dieter, 2024. "Thermodynamic analysis of novel mixtures including siloxanes and cyclic hydrocarbons for high-temperature heat pumps," Energy, Elsevier, vol. 294(C).

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