Technical and Economical Effectiveness of Modernization 370 MW Power Unit Repowered by Gas Turbine with their Modernization to Cogeneration

  • Ryszard Bartnik
  • Zbigniew Buryn


This chapter presents thermodynamic and economic analysis of electric power unit with the rated capacity of 370 MW operating in a combined-cycle, which is repowered by a gas turbine in a parallel system with dual-pressure heat recovery steam generator and concurrently working in a cogeneration for steam feeding from extractions A2 and A3 in the steam turbine and LP-IP crossoverpipe. These calculations apply the mathematical model of the unit presented in Chap. 3 and Stodola-Flügel turbine passage equations for the steam turbine from Chap. 4, which illustrate the variable concentration of steam stream passing through it as a result of repowering the unit by a gas turbine and variable steam extraction for district heating purposes. In the exemplary calculations referred to an assumption is made about the value of a thermal power and its qualitative regulation as presented in Chap. 6. The economic analysis applies the methodology in Chap. 2.


Power Unit Steam Turbine District Heating Exergy Loss Power Compensation 
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  1. 1.
    Bartnik R (2008) Technical and economic efficiency account in utility power engineering. Oficyna Wydawnicza Politechniki Opolskiej, Opole (in Polish)Google Scholar
  2. 2.
    Bartnik R (2009) Combined cycle power plants, thermal and economic effectiveness. WNT, Warszawa (in Polish)Google Scholar

Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  1. 1.Faculty of Mechanical EngineeringOpole University of TechnologyOpolePoland
  2. 2.PGE Power Plant Opole SABrzezie k/OpolaPoland

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