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Thermoeconomic evaluation of the feasibility of highly efficient combined cycle power plants

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  • Franco, Alessandro
  • Casarosa, Claudio

Abstract

The paper proposes an analysis of the feasibility of highly efficient combined plants. The aim of the paper is to discuss and analyze different strategies for the increase of the efficiency of the combined cycle power plants with respect to those usually proposed in the literature. Resorting to the optimization of the components, joined with the use of regeneration and postcombustion (reheat) in the topping cycle it is shown how the combined plant efficiency can rise well over the actually well known limit of 60%. The possibility of obtaining such a high efficiency value is confirmed also by the proposed thermoeconomic optimization, based on the minimization of the total cost of the plant per unit power, obtained referring to a common economic basis the cost of the exergy losses and the costs of the components. The feasibility of obtaining combined plant with efficiency higher than 62%, simply by best fitting the available technology and without waiting for meaningful technological improvement of the gas turbines, is demonstrated.

Suggested Citation

  • Franco, Alessandro & Casarosa, Claudio, 2004. "Thermoeconomic evaluation of the feasibility of highly efficient combined cycle power plants," Energy, Elsevier, vol. 29(12), pages 1963-1982.
    • Handle: RePEc:eee:energy:v:29:y:2004:i:12:p:1963-1982
    DOI: 10.1016/j.energy.2004.03.047
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    References listed on IDEAS

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    1. Valero, Antonio & Lozano, Miguel A. & Serra, Luis & Tsatsaronis, George & Pisa, Javier & Frangopoulos, Christos & von Spakovsky, Michael R., 1994. "CGAM problem: Definition and conventional solution," Energy, Elsevier, vol. 19(3), pages 279-286.
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    1. Colmenar-Santos, Antonio & Gómez-Camazón, David & Rosales-Asensio, Enrique & Blanes-Peiró, Jorge-Juan, 2018. "Technological improvements in energetic efficiency and sustainability in existing combined-cycle gas turbine (CCGT) power plants," Applied Energy, Elsevier, vol. 223(C), pages 30-51.
    2. Kotowicz, Janusz & Bartela, Łukasz, 2010. "The influence of economic parameters on the optimal values of the design variables of a combined cycle plant," Energy, Elsevier, vol. 35(2), pages 911-919.
    3. Rovira, Antonio & Barbero, Rubén & Montes, María José & Abbas, Rubén & Varela, Fernando, 2016. "Analysis and comparison of Integrated Solar Combined Cycles using parabolic troughs and linear Fresnel reflectors as concentrating systems," Applied Energy, Elsevier, vol. 162(C), pages 990-1000.
    4. Bassily, A.M., 2007. "Modeling, numerical optimization, and irreversibility reduction of a triple-pressure reheat combined cycle," Energy, Elsevier, vol. 32(5), pages 778-794.
    5. Bassily, A.M., 2008. "Enhancing the efficiency and power of the triple-pressure reheat combined cycle by means of gas reheat, gas recuperation, and reduction of the irreversibility in the heat recovery steam generator," Applied Energy, Elsevier, vol. 85(12), pages 1141-1162, December.
    6. Chatzimouratidis, Athanasios I. & Pilavachi, Petros A., 2009. "Technological, economic and sustainability evaluation of power plants using the Analytic Hierarchy Process," Energy Policy, Elsevier, vol. 37(3), pages 778-787, March.
    7. Zhang, Guoqiang & Yang, Yongping & Jin, Hongguang & Xu, Gang & Zhang, Kai, 2013. "Proposed combined-cycle power system based on oxygen-blown coal partial gasification," Applied Energy, Elsevier, vol. 102(C), pages 735-745.

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