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Efficiency analysis of a hard-coal-fired supercritical power plant with a four-end high-temperature membrane for air separation

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  • Kotowicz, Janusz
  • Michalski, Sebastian

Abstract

The supercritical power plant analyzed in this paper consists of the following elements: a steam turbine, a hard-coal-fired oxy-type pulverized fuel boiler, an air separation unit with a four-end-type high-temperature membrane and a carbon dioxide capture unit. The electrical power of the steam turbine is 600 MW, the live steam thermodynamic parameters are 650°C/30 MPa, and the reheated steam parameters are 670°C/6 MPa. First of all the net efficiency was calculated as functions of the oxygen recovery rate. The net efficiency was lower than the reference efficiency by 9–10.5pp, and a series of actions were thus proposed to reduce the loss of net efficiency. A change in the boiler structure produced an increase in the boiler efficiency of 2.5–2.74pp. The range of the optimal air compressor pressure ratio (19–23) due to the net efficiency was also determined. The integration of all installations with the steam turbine produced an increase in the gross electric power by up to 50.5 MW. This operation enabled the replacement of the steam regenerative heat exchangers with gas–water heat exchangers. As a result of these alterations, the net efficiency of the analyzed power plant was improved to 5.5pp less than the reference efficiency.

Suggested Citation

  • Kotowicz, Janusz & Michalski, Sebastian, 2014. "Efficiency analysis of a hard-coal-fired supercritical power plant with a four-end high-temperature membrane for air separation," Energy, Elsevier, vol. 64(C), pages 109-119.
  • Handle: RePEc:eee:energy:v:64:y:2014:i:c:p:109-119
    DOI: 10.1016/j.energy.2013.11.006
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    1. Nemitallah, Medhat A. & Habib, Mohamed A. & Mezghani, K., 2015. "Experimental and numerical study of oxygen separation and oxy-combustion characteristics inside a button-cell LNO-ITM reactor," Energy, Elsevier, vol. 84(C), pages 600-611.
    2. Kotowicz, Janusz & Michalski, Sebastian, 2016. "Thermodynamic and economic analysis of a supercritical and an ultracritical oxy-type power plant without and with waste heat recovery," Applied Energy, Elsevier, vol. 179(C), pages 806-820.
    3. Ebrahimi, Armin & Meratizaman, Mousa & Akbarpour Reyhani, Hamed & Pourali, Omid & Amidpour, Majid, 2015. "Energetic, exergetic and economic assessment of oxygen production from two columns cryogenic air separation unit," Energy, Elsevier, vol. 90(P2), pages 1298-1316.
    4. Nikula, Riku-Pekka & Ruusunen, Mika & Leiviskä, Kauko, 2016. "Data-driven framework for boiler performance monitoring," Applied Energy, Elsevier, vol. 183(C), pages 1374-1388.
    5. Bartela, Łukasz & Skorek-Osikowska, Anna & Kotowicz, Janusz, 2015. "An analysis of the investment risk related to the integration of a supercritical coal-fired combined heat and power plant with an absorption installation for CO2 separation," Applied Energy, Elsevier, vol. 156(C), pages 423-435.
    6. Turi, Davide Maria & Chiesa, Paolo & Macchi, Ennio & Ghoniem, Ahmed F., 2016. "High fidelity model of the oxygen flux across ion transport membrane reactor: Mechanism characterization using experimental data," Energy, Elsevier, vol. 96(C), pages 127-141.
    7. Kotowicz, Janusz & Michalski, Sebastian, 2015. "Influence of four-end HTM (high temperature membrane) parameters on the thermodynamic and economic characteristics of a supercritical power plant," Energy, Elsevier, vol. 81(C), pages 662-673.
    8. Janusz Kotowicz & Sebastian Michalski & Mateusz Brzęczek, 2019. "The Characteristics of a Modern Oxy-Fuel Power Plant," Energies, MDPI, vol. 12(17), pages 1-34, September.
    9. Zima, Wiesław & Nowak-Ocłoń, Marzena & Ocłoń, Paweł, 2015. "Simulation of fluid heating in combustion chamber waterwalls of boilers for supercritical steam parameters," Energy, Elsevier, vol. 92(P1), pages 117-127.
    10. Habib, Mohamed A. & Nemitallah, Medhat A., 2015. "Design of an ion transport membrane reactor for application in fire tube boilers," Energy, Elsevier, vol. 81(C), pages 787-801.
    11. José Luis Míguez & Jacobo Porteiro & Raquel Pérez-Orozco & Miguel Ángel Gómez, 2018. "Technology Evolution in Membrane-Based CCS," Energies, MDPI, vol. 11(11), pages 1-18, November.
    12. Kotowicz, Janusz & Job, Marcin & Brzęczek, Mateusz, 2020. "Thermodynamic analysis and optimization of an oxy-combustion combined cycle power plant based on a membrane reactor equipped with a high-temperature ion transport membrane ITM," Energy, Elsevier, vol. 205(C).
    13. Janusz-Szymańska, Katarzyna & Dryjańska, Aleksandra, 2015. "Possibilities for improving the thermodynamic and economic characteristics of an oxy-type power plant with a cryogenic air separation unit," Energy, Elsevier, vol. 85(C), pages 45-61.
    14. Wu, X.D. & Xia, X.H. & Chen, G.Q. & Wu, X.F. & Chen, B., 2016. "Embodied energy analysis for coal-based power generation system-highlighting the role of indirect energy cost," Applied Energy, Elsevier, vol. 184(C), pages 936-950.
    15. Cabeza, Pablo & Silva Queiroz, Joao Paulo & Criado, Manuel & Jiménez, Cristina & Bermejo, Maria Dolores & Mato, Fidel & Cocero, Maria Jose, 2015. "Supercritical water oxidation for energy production by hydrothermal flame as internal heat source. Experimental results and energetic study," Energy, Elsevier, vol. 90(P2), pages 1584-1594.
    16. Braimakis, Konstantinos & Magiri-Skouloudi, Despina & Grimekis, Dimitrios & Karellas, Sotirios, 2020. "Εnergy-exergy analysis of ultra-supercritical biomass-fuelled steam power plants for industrial CHP, district heating and cooling," Renewable Energy, Elsevier, vol. 154(C), pages 252-269.
    17. Habib, Mohamed A. & Nemitallah, Medhat A. & Ahmed, Pervez & Sharqawy, Mostafa H. & Badr, Hassan M. & Muhammad, Inam & Yaqub, Mohamed, 2015. "Experimental analysis of oxygen-methane combustion inside a gas turbine reactor under various operating conditions," Energy, Elsevier, vol. 86(C), pages 105-114.
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