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The influence of economic parameters on the optimal values of the design variables of a combined cycle plant

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  • Kotowicz, Janusz
  • Bartela, Łukasz

Abstract

This paper presents the analysis of the influence of fuel price variation on the optimal values of the design variables of the steam part of a combined cycle plant. The investigated system was a power plant with a triple-pressure heat recovery steam generator and extraction-condensation steam turbine. Fourteen design variables for the steam part were identified. The variables that were optimised were the pressure levels of the working medium in the steam part of the system, and characteristic differences of temperatures in the heat recovery steam generator. Thanks to the development of an optimising programme, based on the genetic algorithms theory, it was possible to find an optimal solution. The indices of economic efficiency, in the form of the break-even price of electricity, were chosen as the objective function in the optimisations. The results of economic optimisations were compared with the results of the optimisation, where the electric efficiency was the objective function. This paper includes an analysis of the sensitivity of the economic objective function to failures in the adherence of the optimal values of decision variables. This analysis allowed the selection of variables such that a failure results in the highest increase of the break-even price of electricity.

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  • 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.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:2:p:911-919
    DOI: 10.1016/j.energy.2009.07.014
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    References listed on IDEAS

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    Cited by:

    1. Sahu, Mithilesh Kumar & Sanjay,, 2017. "Comparative exergoeconomics of power utilities: Air-cooled gas turbine cycle and combined cycle configurations," Energy, Elsevier, vol. 139(C), pages 42-51.
    2. Kotowicz, Janusz & Bartela, Łukasz, 2012. "Optimisation of the connection of membrane CCS installation with a supercritical coal-fired power plant," Energy, Elsevier, vol. 38(1), pages 118-127.
    3. 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.
    4. Katulić, Stjepko & Čehil, Mislav & Schneider, Daniel Rolph, 2018. "Thermodynamic efficiency improvement of combined cycle power plant's bottom cycle based on organic working fluids," Energy, Elsevier, vol. 147(C), pages 36-50.
    5. Ryszard Bartnik & Waldemar Skomudek & Zbigniew Buryn & Anna Hnydiuk-Stefan & Aleksandra Otawa, 2018. "Methodology and Continuous Time Mathematical Model to Select Optimum Power of Gas Turbine Set for Dual-Fuel Gas-Steam Combined Heat and Power Plant in Parallel System," Energies, MDPI, vol. 11(7), pages 1-22, July.
    6. Kotowicz, Janusz & Michalski, Sebastian, 2015. "Influence of four-end HTM (high temperature membrane) parameters on the thermodynamic and economic characteristics of a supercritical power plant," Energy, Elsevier, vol. 81(C), pages 662-673.
    7. Kotowicz, Janusz & Bartela, Łukasz, 2011. "The influence of the legal and economical environment and the profile of activities on the optimal design features of a natural-gas-fired combined heat and power plant," Energy, Elsevier, vol. 36(1), pages 328-338.
    8. Kotowicz, Janusz & Job, Marcin & Brzęczek, Mateusz, 2020. "Thermodynamic analysis and optimization of an oxy-combustion combined cycle power plant based on a membrane reactor equipped with a high-temperature ion transport membrane ITM," Energy, Elsevier, vol. 205(C).
    9. Carcasci, Carlo & Cosi, Lorenzo & Ferraro, Riccardo & Pacifici, Beniamino, 2017. "Effect of a real steam turbine on thermoeconomic analysis of combined cycle power plants," Energy, Elsevier, vol. 138(C), pages 32-47.
    10. Skorek-Osikowska, Anna & Bartela, Łukasz & Kotowicz, Janusz & Sobolewski, Aleksander & Iluk, Tomasz & Remiorz, Leszek, 2014. "The influence of the size of the CHP (combined heat and power) system integrated with a biomass fueled gas generator and piston engine on the thermodynamic and economic effectiveness of electricity an," Energy, Elsevier, vol. 67(C), pages 328-340.
    11. Janusz-Szymańska, Katarzyna & Dryjańska, Aleksandra, 2015. "Possibilities for improving the thermodynamic and economic characteristics of an oxy-type power plant with a cryogenic air separation unit," Energy, Elsevier, vol. 85(C), pages 45-61.
    12. Kotowicz, Janusz & Brzęczek, Mateusz & Job, Marcin, 2018. "The thermodynamic and economic characteristics of the modern combined cycle power plant with gas turbine steam cooling," Energy, Elsevier, vol. 164(C), pages 359-376.
    13. 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.
    14. Nadir, Mahmoud & Ghenaiet, Adel, 2015. "Thermodynamic optimization of several (heat recovery steam generator) HRSG configurations for a range of exhaust gas temperatures," Energy, Elsevier, vol. 86(C), pages 685-695.
    15. Kotowicz, Janusz & Job, Marcin & Brzęczek, Mateusz, 2015. "The characteristics of ultramodern combined cycle power plants," Energy, Elsevier, vol. 92(P2), pages 197-211.

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