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Analysis and Optimization of a s-CO 2 Cycle Coupled to Solar, Biomass, and Geothermal Energy Technologies

Author

Listed:
  • Orlando Anaya-Reyes

    (Department of Mechanical Engineering, Universidad de Guanajuato, Salamanca 36885, Mexico)

  • Iván Salgado-Transito

    (CONAHCyT—Centro de Investigaciones en Óptica A.C., Prol. Constitución 607, Fracc. Reserva Loma Bonita, Aguascalientes 20200, Mexico)

  • David Aarón Rodríguez-Alejandro

    (Department of Mechanical Engineering, Universidad de Guanajuato, Salamanca 36885, Mexico)

  • Alejandro Zaleta-Aguilar

    (Department of Mechanical Engineering, Universidad de Guanajuato, Salamanca 36885, Mexico)

  • Carlos Benito Martínez-Pérez

    (Department of Industrial Engineering, Sistema Avanzado de Bachillerato y Educación Superior en el Estado de Guanajuato, Leon 37234, Mexico)

  • Sergio Cano-Andrade

    (Department of Mechanical Engineering, Universidad de Guanajuato, Salamanca 36885, Mexico)

Abstract

This paper presents an analysis and optimization of a polygeneration power-production system that integrates a concentrating solar tower, a supercritical CO 2 Brayton cycle, a double-flash geothermal Rankine cycle, and an internal combustion engine. The concentrating solar tower is analyzed under the weather conditions of the Mexicali Valley, Mexico, optimizing the incident radiation on the receiver and its size, the tower height, and the number of heliostats and their distribution. The integrated polygeneration system is studied by first and second law analyses, and its optimization is also developed. Results show that the optimal parameters for the solar field are a solar flux of 549.2 kW/m 2 , a height tower of 73.71 m, an external receiver of 1.86 m height with a 6.91 m diameter, and a total of 1116 heliostats of 6 m × 6 m. For the integrated polygeneration system, the optimal values of the variables considered are 1437 kPa and 351.2 kPa for the separation pressures of both flash chambers, 753 °C for the gasification temperature, 741.1 °C for the inlet temperature to the turbine, 2.5 and 1.503 for the turbine pressure ratios, 0.5964 for the air–biomass equivalence ratio, and 0.5881 for the CO 2 mass flow splitting fraction. Finally, for the optimal system, the thermal efficiency is 38.8%, and the exergetic efficiency is 30.9%.

Suggested Citation

  • Orlando Anaya-Reyes & Iván Salgado-Transito & David Aarón Rodríguez-Alejandro & Alejandro Zaleta-Aguilar & Carlos Benito Martínez-Pérez & Sergio Cano-Andrade, 2024. "Analysis and Optimization of a s-CO 2 Cycle Coupled to Solar, Biomass, and Geothermal Energy Technologies," Energies, MDPI, vol. 17(20), pages 1-26, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:20:p:5077-:d:1497357
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    References listed on IDEAS

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    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. 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.
    3. Padilla, Ricardo Vasquez & Soo Too, Yen Chean & Benito, Regano & Stein, Wes, 2015. "Exergetic analysis of supercritical CO2 Brayton cycles integrated with solar central receivers," Applied Energy, Elsevier, vol. 148(C), pages 348-365.
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