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Thermodynamic and economic analysis of a SRCO2–MEOFC–HTSC multi-cycle coupled system for power and steam cogeneration utilizing medium- and high-temperature waste heat

Author

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  • Wang, Zengli
  • Zhu, Yu
  • Nie, Tao
  • Shao, Hua

Abstract

To enhance the utilization efficiency of medium- and high-temperature flue-gas waste heat, a novel power-steam cogeneration system integrating a supercritical CO2 recuperative cycle (SRCO2), a modified organic flash cycle with a two-phase expander (MEOFC), and a high-temperature steam heat pump cycle (HTSC) is proposed. A thermodynamic model was established and optimized using a particle swarm optimization algorithm with net electric output as the objective to determine operating conditions and working fluids. On this basis, the thermodynamic performance of the proposed SRCO2-MEOFC-HTSC system was compared with three existing configurations: SRCO2-organic flash cycle-HTSC (SRCO2-OFC-HTSC), SRCO2-regenerative organic flash cycle-HTSC (SRCO2-REOFC-HTSC), and SRCO2-organic rankine cycle-HTSC (SRCO2-ORC-HTSC). The evaluation was conducted from the perspectives of energy, exergy, economic impact. The results indicate that, using O-xylene as the working fluid for the organic cycle in all four coupled systems, the proposed system yields 3.3%-4.4% higher net power at an expander inlet temperature of 440 °C. After optimization, the optimal working fluid for each coupled system was identified, and under identical heat source conditions, an improvement of 7.0%-13.2% in net power output was achieved. From an economic perspective, the unit cost of energy generation is reduced by 1.8%-5.3% as the heat source temperature increases, while annual primary-energy savings are improved by 3.69%-9.49%. Regarding adaptability to heat source fluctuations, net power output increases by 68.5% to 82.4% over the heat source temperature range of 450-600 °C, demonstrating operational stability. These results confirm that the SRCO2-MEOFC-HTSC system exhibits significant advantages in energy efficiency, performance stability, and cost control.

Suggested Citation

  • Wang, Zengli & Zhu, Yu & Nie, Tao & Shao, Hua, 2026. "Thermodynamic and economic analysis of a SRCO2–MEOFC–HTSC multi-cycle coupled system for power and steam cogeneration utilizing medium- and high-temperature waste heat," Energy, Elsevier, vol. 347(C).
    • Handle: RePEc:eee:energy:v:347:y:2026:i:c:s0360544226004147
    DOI: 10.1016/j.energy.2026.140311
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    1. George Mallouppas & Elias Ar. Yfantis & Constantina Ioannou & Andreas Paradeisiotis & Angelos Ktoris, 2023. "Application of Biogas and Biomethane as Maritime Fuels: A Review of Research, Technology Development, Innovation Proposals, and Market Potentials," Energies, MDPI, vol. 16(4), pages 1-25, February.
    2. Meng, Dongyu & Liu, Qiang & Ji, Zhongli, 2022. "Effects of two-phase expander on the thermoeconomics of organic double-flash cycles for geothermal power generation," Energy, Elsevier, vol. 239(PD).
    3. Florian Raab & Lennart Böse & Harald Klein & Frank Opferkuch, 2024. "Steam Storage Rankine Cycle for Unutilized Applications in Distributed High-Temperature Waste Heat Recovery," Energies, MDPI, vol. 17(4), pages 1-26, February.
    4. Zeng, Sheng & Su, Bin & Zhang, Minglong & Gao, Yuan & Liu, Jun & Luo, Song & Tao, Qingmei, 2021. "Analysis and forecast of China's energy consumption structure," Energy Policy, Elsevier, vol. 159(C).
    5. Ho, Tony & Mao, Samuel S. & Greif, Ralph, 2012. "Increased power production through enhancements to the Organic Flash Cycle (OFC)," Energy, Elsevier, vol. 45(1), pages 686-695.
    6. Liu, Qiang & Shen, Aijing & Duan, Yuanyuan, 2015. "Parametric optimization and performance analyses of geothermal organic Rankine cycles using R600a/R601a mixtures as working fluids," Applied Energy, Elsevier, vol. 148(C), pages 410-420.
    7. Yue, Chen & Tong, Le & Zhang, Shizhong, 2019. "Thermal and economic analysis on vehicle energy supplying system based on waste heat recovery organic Rankine cycle," Applied Energy, Elsevier, vol. 248(C), pages 241-255.
    8. 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.
    9. Kim, Min Seok & Ahn, Yoonhan & Kim, Beomjoo & Lee, Jeong Ik, 2016. "Study on the supercritical CO2 power cycles for landfill gas firing gas turbine bottoming cycle," Energy, Elsevier, vol. 111(C), pages 893-909.
    10. Dzierwa, Piotr & Trojan, Marcin & Peret, Patryk & Taler, Jan & Taler, Dawid & Kaczmarski, Karol & Wrobel, Wojciech & Bator, Jakub, 2024. "Technological and economical analysis of the heat recovery system from flue gas in a thermal waste treatment plant," Energy, Elsevier, vol. 307(C).
    11. Song, Jian & Li, Xue-song & Ren, Xiao-dong & Gu, Chun-wei, 2018. "Performance analysis and parametric optimization of supercritical carbon dioxide (S-CO2) cycle with bottoming Organic Rankine Cycle (ORC)," Energy, Elsevier, vol. 143(C), pages 406-416.
    12. Tailu Li & Zeyu Wang & Jingyi Wang & Xiang Gao, 2023. "Dynamic Performance of Organic Rankine Cycle Driven by Fluctuant Industrial Waste Heat for Building Power Supply," Energies, MDPI, vol. 16(2), pages 1-24, January.
    13. Paul Njock, Julbin & Thierry Sosso, Olivier & Stouffs, Pascal & Nzengwa, Robert, 2022. "A comparative energy analysis of idealized cycles using an ammonia-water mixture for combined power/cooling," Energy, Elsevier, vol. 261(PA).
    14. Ho, Tony & Mao, Samuel S. & Greif, Ralph, 2012. "Comparison of the Organic Flash Cycle (OFC) to other advanced vapor cycles for intermediate and high temperature waste heat reclamation and solar thermal energy," Energy, Elsevier, vol. 42(1), pages 213-223.
    15. Kazemi, Shabnam & Nor, Mohamad Iskandr Mohamad & Teoh, Wen Hui, 2020. "Thermodynamic and economic investigation of an ionic liquid as a new proposed geothermal fluid in different organic Rankine cycles for energy production," Energy, Elsevier, vol. 193(C).
    16. Kim, Young Min & Sohn, Jeong Lak & Yoon, Eui Soo, 2017. "Supercritical CO2 Rankine cycles for waste heat recovery from gas turbine," Energy, Elsevier, vol. 118(C), pages 893-905.
    17. Ndamé Ngangué, Max & Nguefack Lekané, Nelson & Njock, Julbin Paul & Sosso, Olivier Thierry & Stouffs, Pascal, 2023. "Working fluid selection for a high efficiency integrated power/cooling system combining an organic Rankine cycle and vapor compression-absorption cycles," Energy, Elsevier, vol. 277(C).
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