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Exergy-based method for analyzing the composition of the electricity cost generated in gas-fired combined cycle plants

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  • Borelli, Samuel José Sarraf
  • de Oliveira Junior, Silvio

Abstract

The proposed method to analyze the composition of the cost of electricity is based on the energy conversion processes and the destruction of the exergy through the several thermodynamic processes that comprise a combined cycle power plant. The method uses thermoeconomics to evaluate and allocate the cost of exergy throughout the processes, considering costs related to inputs and investment in equipment. Although the concept may be applied to any combined cycle or cogeneration plant, this work develops only the mathematical modeling for three-pressure heat recovery steam generator (HRSG) configurations and total condensation of the produced steam. It is possible to study any n×1 plant configuration (n sets of gas turbine and HRSGs associated to one steam turbine generator and condenser) with the developed model, assuming that every train operates identically and in steady state. The presented model was conceived from a complex configuration of a real power plant, over which variations may be applied in order to adapt it to a defined configuration under study [Borelli SJS. Method for the analysis of the composition of electricity costs in combined cycle thermoelectric power plants. Master in Energy Dissertation, Interdisciplinary Program of Energy, Institute of Eletro-technical and Energy, University of São Paulo, São Paulo, Brazil, 2005 (in Portuguese)]. The variations and adaptations include, for instance, use of reheat, supplementary firing and partial load operation. It is also possible to undertake sensitivity analysis on geometrical equipment parameters.

Suggested Citation

  • Borelli, Samuel José Sarraf & de Oliveira Junior, Silvio, 2008. "Exergy-based method for analyzing the composition of the electricity cost generated in gas-fired combined cycle plants," Energy, Elsevier, vol. 33(2), pages 153-162.
    • Handle: RePEc:eee:energy:v:33:y:2008:i:2:p:153-162
    DOI: 10.1016/j.energy.2007.06.008
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    Citations

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    Cited by:

    1. Zhiquan Wu & Shaoxiang Zhou & Liansuo An & Guoqing Shen & Hailin Shi, 2011. "Theoretical Foundation for Energy Structure Adjustment," Modern Applied Science, Canadian Center of Science and Education, vol. 5(1), pages 133-133, February.
    2. Carapellucci, Roberto & Giordano, Lorena, 2013. "A comparison between exergetic and economic criteria for optimizing the heat recovery steam generators of gas-steam power plants," Energy, Elsevier, vol. 58(C), pages 458-472.
    3. Flórez-Orrego, Daniel & de Oliveira Junior, Silvio, 2016. "On the efficiency, exergy costs and CO2 emission cost allocation for an integrated syngas and ammonia production plant," Energy, Elsevier, vol. 117(P2), pages 341-360.
    4. Variny, Miroslav & Mierka, Otto, 2011. "Technologic, economic and exergoeconomic evaluation of proposed industrial heat and power plant revamp alternatives in an industrial company in Slovakia," Energy, Elsevier, vol. 36(1), pages 424-437.
    5. Goswami, Rohtash & Das, Ranjan, 2020. "Waste heat recovery from a biomass heat engine for thermoelectric power generation using two-phase thermosyphons," Renewable Energy, Elsevier, vol. 148(C), pages 1280-1291.
    6. Naserabad, S. Nikbakht & Mehrpanahi, A. & Ahmadi, G., 2018. "Multi-objective optimization of HRSG configurations on the steam power plant repowering specifications," Energy, Elsevier, vol. 159(C), pages 277-293.
    7. Manassaldi, Juan I. & Mussati, Sergio F. & Scenna, Nicolás J., 2011. "Optimal synthesis and design of Heat Recovery Steam Generation (HRSG) via mathematical programming," Energy, Elsevier, vol. 36(1), pages 475-485.

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