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Optimization of reheat pressures in thermal power plants

Author

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  • Habib, M.A.
  • Said, S.A.M.
  • Al-Zaharna, I.

Abstract

We present a procedure for optimization of the first and second reheat pressures in thermal power plants. The analysis is based on the first-law efficiency and exergy-balance equations. For analysis, the plant is divided into two main units (the steam generator and the turbine cycle). The results indicate that a range of first and second reheat pressures satisfy diffrent constraints. Improvement in the plant second-law efficiency with increased reheat pressure are due to improvements in the turbine-cycle unit. Exergy destruction in the steam generator, which accounts for more than half of the exergy destruction in the power plant, is not significantly affected by reheat pressures.

Suggested Citation

  • Habib, M.A. & Said, S.A.M. & Al-Zaharna, I., 1995. "Optimization of reheat pressures in thermal power plants," Energy, Elsevier, vol. 20(6), pages 555-565.
    • Handle: RePEc:eee:energy:v:20:y:1995:i:6:p:555-565
    DOI: 10.1016/0360-5442(94)00087-J
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    Cited by:

    1. Habib, M. A. & Said, S. A. M. & Al-Zaharna, I., 1999. "Thermodynamic optimization of reheat regenerative thermal-power plants," Applied Energy, Elsevier, vol. 63(1), pages 17-34, May.
    2. Lee, Jae Chul & Lee, Hyeon Hui & Joo, Yong Jin & Lee, Chang Ha & Oh, Min, 2014. "Process simulation and thermodynamic analysis of an IGCC (integrated gasification combined cycle) plant with an entrained coal gasifier," Energy, Elsevier, vol. 64(C), pages 58-68.
    3. Díaz Pérez, Álvaro A. & Escobar Palacio, José C. & Venturini, Osvaldo J. & Martínez Reyes, Arnaldo M. & Rúa Orozco, Dimas J. & Silva Lora, Electo E. & Almazán del Olmo, Oscar A., 2018. "Thermodynamic and economic evaluation of reheat and regeneration alternatives in cogeneration systems of the Brazilian sugarcane and alcohol sector," Energy, Elsevier, vol. 152(C), pages 247-262.
    4. Gupta, M.K. & Kaushik, S.C., 2010. "Exergy analysis and investigation for various feed water heaters of direct steam generation solar–thermal power plant," Renewable Energy, Elsevier, vol. 35(6), pages 1228-1235.

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